Sample records for ventilation enthalpy recovery

  1. Enthalpy Wheels Come of Age: Applying Energy Recovery Ventilation to Hospitality Venues in Hot, Humid Climate

    E-Print Network [OSTI]

    Wellford, B. W.

    2000-01-01T23:59:59.000Z

    ventilation to hospitality venues in hot, humid climates need not be complex. This paper proposes guidelines that can facilitate application of the technology by specifiers or other construction professionals. These guidelines address evaluation of typical...

  2. ENERGY IMPACTS OF VARIOUS RESIDENTIAL MECHANICAL VENTILATION STRATEGIES 

    E-Print Network [OSTI]

    Vieira, R.; Parker, D.; Lixing, G.; Wichers, M.

    2008-01-01T23:59:59.000Z

    . Enthalpy recovery ventilation units tend to use more energy overall - despite the heat recovery - than supply or exhaust only ventilation systems, due to using twice as much fan energy. This paper presents simulation results for eight ventilation strategies...

  3. Formaldehyde Transfer in Residential Energy Recovery Ventilators

    E-Print Network [OSTI]

    ;1. INTRODUCTION Mechanical ventilation systems were once considered unnecessary for single-family, US homes

  4. The Energy Saving Potential of Membrane-Based Enthalpy Recovery in Vav Systems for Commercial

    E-Print Network [OSTI]

    for Commercial Office Buildings Authors, Liping Wang, Philip Haves, and John Breshears Environmental Energy POTENTIAL OF MEMBRANE-BASED ENTHALPY RECOVERY IN VAV SYSTEMS FOR COMMERCIAL OFFICE BUILDINGS Liping Wang1 in EnergyPlus. A case using a desiccant wheel for energy recovery was also investigated for comparison

  5. Development of a High Latent Effectiveness Energy Recovery Ventilator with Integration into Rooftop Package Equipment

    SciTech Connect (OSTI)

    Gregory M. Dobbs; Norberto O. Lemcoff; Frederick J. Cogswell; Jeffrey T. Benolt

    2006-03-01T23:59:59.000Z

    This Final Report covers the Cooperative Program carried out to design and optimize an enhanced flat-plate energy recovery ventilator and integrate it into a packaged unitary (rooftop) air conditioning unit. The project objective was to optimize the design of a flat plate energy recovery ventilator (ERV) core that compares favorably to flat plate air-to-air heat exchanger cores on the market and to cost wise to small enthalpy wheel devices. The benefits of an integrated unit incorporating an enhanced ERV core and a downsized heating/cooling unit were characterized and the design of an integrated unit considering performance and cost was optimized. Phase I was to develop and optimize the design of a membrane based heat exchanger core. Phase II was the creation and observation of a system integrated demonstrator unit consisting of the Enhanced Energy Recovery Ventilator (EERV) developed in Phase I coupled to a standard Carrier 50HJ rooftop packaged unitary air conditioning unit. Phase III was the optimization of the system prior to commercialization based on the knowledge gained in Phase II. To assure that the designs chosen have the possibility of meeting cost objectives, a preliminary manufacturability and production cost study was performed by the Center for Automation Technologies at RPI. Phase I also included a preliminary design for the integrated unit to be further developed in Phase II. This was to assure that the physical design of the heat exchanger designed in Phase I would be acceptable for use in Phase II. An extensive modeling program was performed by the Center for Building Performance & Diagnostics of CMU. Using EnergyPlus as the software, a typical office building with multiple system configurations in multiple climatic zones in the US was simulated. The performance of energy recovery technologies in packaged rooftop HVAC equipment was evaluated. The experimental program carried out in Phases II and III consisted of fabricating and testing a demonstrator unit using Carrier Comfort Network (CCN) based controls. Augmenting the control signals, CCN was also used to monitor and record additional performance data that supported modeling and conceptual understanding. The result of the testing showed that the EERV core developed in Phase I recovered energy in the demonstrator unit at the expected levels based on projections. In fact, at near-ARI conditions the core recovered about one ton of cooling enthalpy when operating with a three-ton rooftop packaged unit.

  6. Ventilative cooling

    E-Print Network [OSTI]

    Graça, Guilherme Carrilho da, 1972-

    1999-01-01T23:59:59.000Z

    This thesis evaluates the performance of daytime and nighttime passive ventilation cooling strategies for Beijing, Shanghai and Tokyo. A new simulation method for cross-ventilated wind driven airflow is presented . This ...

  7. RECOMMENDED VENTILATION STRATEGIES FOR ENERGY-EFFICIENT PRODUCTION HOMES

    E-Print Network [OSTI]

    -port exhaust ventilation fan, and that builders offer balanced heat- recovery ventilation to buyersLBNL-40378 UC-000 RECOMMENDED VENTILATION STRATEGIES FOR ENERGY-EFFICIENT PRODUCTION HOMES Judy A of Energy under Contract No. DE-AC03-76SF00098. #12;i Abstract This report evaluates residential ventilation

  8. Demand Controlled Ventilation and Classroom Ventilation

    E-Print Network [OSTI]

    Fisk, William J.

    2014-01-01T23:59:59.000Z

    2 -based demand controlled ventilation using ASHRAE Standardoptimizing energy use and ventilation. ASHRAE TransactionsWJ, Grimsrud DT, et al. 2011. Ventilation rates and health:

  9. DEMAND CONTROLLED VENTILATION AND CLASSROOM VENTILATION

    E-Print Network [OSTI]

    Fisk, William J.

    2014-01-01T23:59:59.000Z

    for demand controlled ventilation in commercial buildings.The energy costs of classroom ventilation and some financialEstimating potential benefits of increased ventilation

  10. Demand Controlled Ventilation and Classroom Ventilation

    E-Print Network [OSTI]

    Fisk, William J.

    2014-01-01T23:59:59.000Z

    use of demand control ventilation systems in general officedemand controlled  ventilation systems, Dennis DiBartolomeo the demand controlled ventilation system increased the rate 

  11. Field and Laboratory Study of a Ground-Coupled Water Source Heat Pump with an Integral Enthalpy Exchange System for Classrooms

    E-Print Network [OSTI]

    Domitrovic, R.; Hayzen, G. J.; Johnson, W. S.; Chen, F. C.

    2002-01-01T23:59:59.000Z

    technologies is needed to increase the dehumidification abilities of equipment without compromising energy efficiency or the need for fresh ventilation air. To study the effectiveness of integrated heat pump and enthalpy exchange equipment, a nominal 4-ton...

  12. Ventilation Model

    SciTech Connect (OSTI)

    H. Yang

    1999-11-04T23:59:59.000Z

    The purpose of this analysis and model report (AMR) for the Ventilation Model is to analyze the effects of pre-closure continuous ventilation in the Engineered Barrier System (EBS) emplacement drifts and provide heat removal data to support EBS design. It will also provide input data (initial conditions, and time varying boundary conditions) for the EBS post-closure performance assessment and the EBS Water Distribution and Removal Process Model. The objective of the analysis is to develop, describe, and apply calculation methods and models that can be used to predict thermal conditions within emplacement drifts under forced ventilation during the pre-closure period. The scope of this analysis includes: (1) Provide a general description of effects and heat transfer process of emplacement drift ventilation. (2) Develop a modeling approach to simulate the impacts of pre-closure ventilation on the thermal conditions in emplacement drifts. (3) Identify and document inputs to be used for modeling emplacement ventilation. (4) Perform calculations of temperatures and heat removal in the emplacement drift. (5) Address general considerations of the effect of water/moisture removal by ventilation on the repository thermal conditions. The numerical modeling in this document will be limited to heat-only modeling and calculations. Only a preliminary assessment of the heat/moisture ventilation effects and modeling method will be performed in this revision. Modeling of moisture effects on heat removal and emplacement drift temperature may be performed in the future.

  13. Ventilation Model

    SciTech Connect (OSTI)

    V. Chipman

    2002-10-05T23:59:59.000Z

    The purpose of the Ventilation Model is to simulate the heat transfer processes in and around waste emplacement drifts during periods of forced ventilation. The model evaluates the effects of emplacement drift ventilation on the thermal conditions in the emplacement drifts and surrounding rock mass, and calculates the heat removal by ventilation as a measure of the viability of ventilation to delay the onset of peak repository temperature and reduce its magnitude. The heat removal by ventilation is temporally and spatially dependent, and is expressed as the fraction of heat carried away by the ventilation air compared to the fraction of heat produced by radionuclide decay. One minus the heat removal is called the wall heat fraction, or the remaining amount of heat that is transferred via conduction to the surrounding rock mass. Downstream models, such as the ''Multiscale Thermohydrologic Model'' (BSC 2001), use the wall heat fractions as outputted from the Ventilation Model to initialize their post-closure analyses. The Ventilation Model report was initially developed to analyze the effects of preclosure continuous ventilation in the Engineered Barrier System (EBS) emplacement drifts, and to provide heat removal data to support EBS design. Revision 00 of the Ventilation Model included documentation of the modeling results from the ANSYS-based heat transfer model. The purposes of Revision 01 of the Ventilation Model are: (1) To validate the conceptual model for preclosure ventilation of emplacement drifts and verify its numerical application in accordance with new procedural requirements as outlined in AP-SIII-10Q, Models (Section 7.0). (2) To satisfy technical issues posed in KTI agreement RDTME 3.14 (Reamer and Williams 2001a). Specifically to demonstrate, with respect to the ANSYS ventilation model, the adequacy of the discretization (Section 6.2.3.1), and the downstream applicability of the model results (i.e. wall heat fractions) to initialize post-closure thermal models (Section 6.6). (3) To satisfy the remainder of KTI agreement TEF 2.07 (Reamer and Williams 2001b). Specifically to provide the results of post-test ANSYS modeling of the Atlas Facility forced convection tests (Section 7.1.2). This portion of the model report also serves as a validation exercise per AP-SIII.10Q, Models, for the ANSYS ventilation model. (4) To further satisfy KTI agreements RDTME 3.01 and 3.14 (Reamer and Williams 2001a) by providing the source documentation referred to in the KTI Letter Report, ''Effect of Forced Ventilation on Thermal-Hydrologic Conditions in the Engineered Barrier System and Near Field Environment'' (Williams 2002). Specifically to provide the results of the MULTIFLUX model which simulates the coupled processes of heat and mass transfer in and around waste emplacement drifts during periods of forced ventilation. This portion of the model report is presented as an Alternative Conceptual Model with a numerical application, and also provides corroborative results used for model validation purposes (Section 6.3 and 6.4).

  14. DOWNHOLE ENTHALPY MEASUREMENT IN GEOTHERMAL

    E-Print Network [OSTI]

    Stanford University

    SGP-TR-186 DOWNHOLE ENTHALPY MEASUREMENT IN GEOTHERMAL WELLS WITH FIBER OPTICS Nilufer Atalay June 2008 Financial support was provided through the Stanford Geothermal Program under Idaho National University Stanford Geothermal Program Interdisciplinary Research in Engineering and Earth Sciences STANFORD

  15. Demand Controlled Ventilation and Classroom Ventilation

    E-Print Network [OSTI]

    Fisk, William J.

    2014-01-01T23:59:59.000Z

    to districts for ventilation, heating, and cooling.   Thus G is the gas use for heating ventilation  air, G i  is the air  gas use for heating ventilation air  the time elapsed 

  16. Impact of Independently Controlling Ventilation Rate per Person and Ventilation

    E-Print Network [OSTI]

    1 Impact of Independently Controlling Ventilation Rate per Person and Ventilation Rate per Floor Impact of Independently Controlling Ventilation Rate per Person and Ventilation Rate per Floor Area

  17. Recovering Energy From Ventilation and Process Airstreams

    E-Print Network [OSTI]

    Cheney, W. A.

    RECOVERING ENERGY FROM VENTILATION AND PROCESS AIRSTREAMS Heat Exchangers and contaminant Recovery William A. Cheney united Air Specialists, Inc. Cincinnati, Ohio The high cost of energy has prompted industry to look for new ways to reduce... 17-19, 1986 CONTAMINANT RECOVERY The ability to capture waste energy from an airstream, while simultaneously condensing hydrocarbon vapors, is a rela tively new technique in the heat-recovery market. In this process, high concentra tions...

  18. Meeting Residential Ventilation Standards

    E-Print Network [OSTI]

    ventilation standards, including American Society of Heating, Refrigerating, and Air-conditioning EngineersLBNL 4591E Meeting Residential Ventilation Standards Through Dynamic Control of Ventilation Systems (ASHRAE) Standard 62.2, specify continuous operation of a defined mechanical ventilation system to provide

  19. Meeting Residential Ventilation Standards Through Dynamic Control of Ventilation Systems

    E-Print Network [OSTI]

    Sherman, Max H.

    2011-01-01T23:59:59.000Z

    2007. Review of residential ventilation technologies. HVAC&Rof intermittent ventilation for providing acceptable indoorResidential Integrated Ventilation Controller. Energy

  20. Economizer Control Using Mixed Air Enthalpy

    E-Print Network [OSTI]

    Feng, J.; Liu, M.; Pang, W.

    2007-01-01T23:59:59.000Z

    economizer is db-temperature based economizer. Table7. Economizer Operation Testing Period: April.3 rd ~Aug. 22 th ,2007 Temperature- based Economizer Mixed-air enthalpy economizer Operation hours 888 1251 Energy saving - 15.7% 6...

  1. DEMAND CONTROLLED VENTILATION AND CLASSROOM VENTILATION

    SciTech Connect (OSTI)

    Fisk, William J.; Mendell, Mark J.; Davies, Molly; Eliseeva, Ekaterina; Faulkner, David; Hong, Tienzen; Sullivan, Douglas P.

    2014-01-06T23:59:59.000Z

    This document summarizes a research effort on demand controlled ventilation and classroom ventilation. The research on demand controlled ventilation included field studies and building energy modeling. Major findings included: ? The single-location carbon dioxide sensors widely used for demand controlled ventilation frequently have large errors and will fail to effectively control ventilation rates (VRs).? Multi-location carbon dioxide measurement systems with more expensive sensors connected to multi-location sampling systems may measure carbon dioxide more accurately.? Currently-available optical people counting systems work well much of the time but have large counting errors in some situations. ? In meeting rooms, measurements of carbon dioxide at return-air grilles appear to be a better choice than wall-mounted sensors.? In California, demand controlled ventilation in general office spaces is projected to save significant energy and be cost effective only if typical VRs without demand controlled ventilation are very high relative to VRs in codes. Based on the research, several recommendations were developed for demand controlled ventilation specifications in the California Title 24 Building Energy Efficiency Standards.The research on classroom ventilation collected data over two years on California elementary school classrooms to investigate associations between VRs and student illness absence (IA). Major findings included: ? Median classroom VRs in all studied climate zones were below the California guideline, and 40percent lower in portable than permanent buildings.? Overall, one additional L/s per person of VR was associated with 1.6percent less IA. ? Increasing average VRs in California K-12 classrooms from the current average to the required level is estimated to decrease IA by 3.4percent, increasing State attendance-based funding to school districts by $33M, with $6.2 M in increased energy costs. Further VR increases would provide additional benefits.? Confirming these findings in intervention studies is recommended. ? Energy costs of heating/cooling unoccupied classrooms statewide are modest, but a large portion occurs in relatively few classrooms.

  2. Development of a Residential Integrated Ventilation Controller

    E-Print Network [OSTI]

    Walker, Iain

    2013-01-01T23:59:59.000Z

    Comparative Evaluation of Ventilation Systems. ” ASHRAEChimneys for Residential Ventilation. ” AIVC 25 Conference.1995. “Controlled Ventilation Options for Builders. ” Energy

  3. Does Mixing Make Residential Ventilation More Effective?

    E-Print Network [OSTI]

    Sherman, Max

    2011-01-01T23:59:59.000Z

    Mechanical Ventilation Systems. ” Int. J. Ventilation, 6(4),Residential Mechanical Ventilation Systems. ” ASHRAE HVAC&Rfor Extension of Ventilation System Tracer Gas Testing. ”

  4. Performance of ventilators for noninvasive positive pressure ventilation in children

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Performance of ventilators for noninvasive positive pressure ventilation in children Brigitte title: ventilators for noninvasive ventilation Supports and grants: The research of Brigitte Fauroux;2 Abstract The aim of the study was to evaluate the performance characteristics of all the ventilators

  5. Ventilation Model Report

    SciTech Connect (OSTI)

    V. Chipman; J. Case

    2002-12-20T23:59:59.000Z

    The purpose of the Ventilation Model is to simulate the heat transfer processes in and around waste emplacement drifts during periods of forced ventilation. The model evaluates the effects of emplacement drift ventilation on the thermal conditions in the emplacement drifts and surrounding rock mass, and calculates the heat removal by ventilation as a measure of the viability of ventilation to delay the onset of peak repository temperature and reduce its magnitude. The heat removal by ventilation is temporally and spatially dependent, and is expressed as the fraction of heat carried away by the ventilation air compared to the fraction of heat produced by radionuclide decay. One minus the heat removal is called the wall heat fraction, or the remaining amount of heat that is transferred via conduction to the surrounding rock mass. Downstream models, such as the ''Multiscale Thermohydrologic Model'' (BSC 2001), use the wall heat fractions as outputted from the Ventilation Model to initialize their post-closure analyses. The Ventilation Model report was initially developed to analyze the effects of preclosure continuous ventilation in the Engineered Barrier System (EBS) emplacement drifts, and to provide heat removal data to support EBS design. Revision 00 of the Ventilation Model included documentation of the modeling results from the ANSYS-based heat transfer model. Revision 01 ICN 01 included the results of the unqualified software code MULTIFLUX to assess the influence of moisture on the ventilation efficiency. The purposes of Revision 02 of the Ventilation Model are: (1) To validate the conceptual model for preclosure ventilation of emplacement drifts and verify its numerical application in accordance with new procedural requirements as outlined in AP-SIII-10Q, Models (Section 7.0). (2) To satisfy technical issues posed in KTI agreement RDTME 3.14 (Reamer and Williams 2001a). Specifically to demonstrate, with respect to the ANSYS ventilation model, the adequacy of the discretization (Section 6.2.3.1), and the downstream applicability of the model results (i.e. wall heat fractions) to initialize post-closure thermal models (Section 6.6). (3) To satisfy the remainder of KTI agreement TEF 2.07 (Reamer and Williams 2001b). Specifically to provide the results of post-test ANSYS modeling of the Atlas Facility forced convection tests (Section 7.1.2). This portion of the model report also serves as a validation exercise per AP-SIII.10Q, Models, for the ANSYS ventilation model. (4) To asses the impacts of moisture on the ventilation efficiency.

  6. Ventilation Air Preconditioning Systems

    E-Print Network [OSTI]

    Khattar, M.; Brandemuehl, M. J.

    1996-01-01T23:59:59.000Z

    simply and cost-effectively with a dual path arrangement that treats and controls the ventilation air independently of the recirculation air. The Electric Power Research Institute (EPRI)--the nonprofit R&D arm of the electric utility industry... particular type of application. EPRI is developing variations of the dual path concept to meet different reeofit and new construction markets. Figure 6. Ventilation Air Conditioner as a Separate Unit EPRVCALMAC System: Separate Unit for Ventilation Air...

  7. Meeting Residential Ventilation Standards Through Dynamic Control of Ventilation Systems

    E-Print Network [OSTI]

    Sherman, Max H.

    2011-01-01T23:59:59.000Z

    Dynamic Control of Ventilation Systems M.H. Sherman and I.S.a defined mechanical ventilation system to provide minimumair as part of ventilation system operation changes with

  8. Building Science- Ventilation

    Broader source: Energy.gov [DOE]

    This presentation was given at the Summer 2012 DOE Building America meeting on July 25, 2012, and addressed the question "What are the best ventilation techniques"

  9. Meeting Residential Ventilation Standards Through Dynamic Control of Ventilation Systems

    E-Print Network [OSTI]

    Sherman, Max H.

    2011-01-01T23:59:59.000Z

    with a detailed heating, ventilation, and air conditioning (well as ventilation systems integrated into heating (naturalventilation standards, including American Society of Heating,

  10. Meeting Residential Ventilation Standards Through Dynamic Control of Ventilation Systems

    E-Print Network [OSTI]

    Sherman, Max H.

    2011-01-01T23:59:59.000Z

    Rudd. 2007. Review of residential ventilation technologies.2009. EISG Final Report: Residential Integrated VentilationDesign and Operation of Residential Cooling Systems. Proc.

  11. Effect of Ventilation Strategies on

    E-Print Network [OSTI]

    1 Effect of Ventilation Strategies on Residential Ozone Levels Iain S. Walker ventilation used to reduce concentrations of indoor-generated pollutants. When assessing the effect of deliberate ventilation on occupant health one should consider not only

  12. Recommended Ventilation Strategies for Energy-Efficient Production Homes

    SciTech Connect (OSTI)

    Roberson, J.; Brown, R.; Koomey, J.; Warner, J.; Greenberg, S.

    1998-12-01T23:59:59.000Z

    This report evaluates residential ventilation systems for the U.S. Environmental Protection Agency's (EPA's) ENERGY STAR{reg_sign} Homes program and recommends mechanical ventilation strategies for new, low-infiltration, energy-efficient, single-family, ENERGY STAR production (site-built tract) homes in four climates: cold, mixed (cold and hot), hot humid, and hot arid. Our group in the Energy Analysis Department at Lawrence Berkeley National Lab compared residential ventilation strategies in four climates according to three criteria: total annualized costs (the sum of annualized capital cost and annual operating cost), predominant indoor pressure induced by the ventilation system, and distribution of ventilation air within the home. The mechanical ventilation systems modeled deliver 0.35 air changes per hour continuously, regardless of actual infiltration or occupant window-opening behavior. Based on the assumptions and analysis described in this report, we recommend independently ducted multi-port supply ventilation in all climates except cold because this strategy provides the safety and health benefits of positive indoor pressure as well as the ability to dehumidify and filter ventilation air. In cold climates, we recommend that multi-port supply ventilation be balanced by a single-port exhaust ventilation fan, and that builders offer balanced heat-recovery ventilation to buyers as an optional upgrade. For builders who continue to install forced-air integrated supply ventilation, we recommend ensuring ducts are airtight or in conditioned space, installing a control that automatically operates the forced-air fan 15-20 minutes during each hour that the fan does not operate for heating or cooling, and offering ICM forced-air fans to home buyers as an upgrade.

  13. Laboratory Evaluation of Energy Recovery Ventilators

    SciTech Connect (OSTI)

    Kosar, D.

    2013-05-01T23:59:59.000Z

    This document is no longer available. Please contact Stacey.Rothgeb@nrel.gov for further information.

  14. Energy Recovery Ventilator Membrane Efficiency Testing

    E-Print Network [OSTI]

    Rees, Jennifer Anne

    2013-05-07T23:59:59.000Z

    ) vc Kinematic Viscosity (m2/s) W Width of Duct (m) w Absolute Humidity (kg water/ kg air) ? Efficiency (%) ? Density of Fluid (kg/m3) ? Viscosity of Fluid (Pa*s) Subscripts a Air c Cold Side c Convective c Cross Sectional Area h Hot Side... .................................................. 55 Figure 25 Cold Side Temperatures vs. Ambient ................................................ 55 Figure 26 Relative Humidities vs. Ambient ........................................................ 56 xi Page Figure 27 Hot Side...

  15. Multifamily Ventilation Retrofit Strategies

    SciTech Connect (OSTI)

    Ueno, K.; Lstiburek, J.; Bergey, D.

    2012-12-01T23:59:59.000Z

    In multifamily buildings, central ventilation systems often have poor performance, overventilating some portions of the building (causing excess energy use), while simultaneously underventilating other portions (causing diminished indoor air quality). BSC and Innova Services Corporation performed a series of field tests at a mid-rise test building undergoing a major energy audit and retrofit, which included ventilation system upgrades.

  16. Ventilation Behavior and Household Characteristics in New California Houses

    E-Print Network [OSTI]

    Price, Phillip N.; Sherman, Max H.

    2006-01-01T23:59:59.000Z

    pollutant sources get more ventilation. • Except householdshealth issues motivate ventilation behavior. • Security andQuality, IAQ, mechanical ventilation systems, ventilation

  17. Why We Ventilate

    SciTech Connect (OSTI)

    Logue, Jennifer M.; Sherman, Max H.; Price, Phil N.; Singer, Brett C.

    2011-09-01T23:59:59.000Z

    It is widely accepted that ventilation is critical for providing good indoor air quality (IAQ) in homes. However, the definition of"good" IAQ, and the most effective, energy efficient methods for delivering it are still matters of research and debate. This paper presents the results of work done at the Lawrence Berkeley National Lab to identify the air pollutants that drive the need for ventilation as part of a larger effort to develop a health-based ventilation standard. First, we present results of a hazard analysis that identified the pollutants that most commonly reach concentrations in homes that exceed health-based standards or guidelines for chronic or acute exposures. Second, we present results of an impact assessment that identified the air pollutants that cause the most harm to the U.S. population from chronic inhalation in residences. Lastly, we describe the implications of our findings for developing effective ventilation standards.

  18. Formation enthalpies by mixing GGA and GGA + U calculations

    E-Print Network [OSTI]

    Jain, Anubhav

    Standard approximations to the density functional theory exchange-correlation functional have been extraordinary successful, but calculating formation enthalpies of reactions involving compounds with both localized and ...

  19. Enthalpy and mass flowrate measurements for two-phase geothermal...

    Open Energy Info (EERE)

    by Tracer dilution techniques Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Enthalpy and mass flowrate measurements for two-phase...

  20. Mixed-Mode Ventilation and Building Retrofits

    E-Print Network [OSTI]

    Brager, Gail; Ackerly, Katie

    2010-01-01T23:59:59.000Z

    Page 15 Mixed-Mode Ventilation and Building RetrofitsEngineers. 2000. Mixed-mode ventilation. CIBSE ApplicationsMichael. 2000. Hybrid Ventilation Systems: An Arup Approach

  1. Cooling airflow design tool for displacement ventilation.

    E-Print Network [OSTI]

    Schiavon, Stefano; Bauman, Fred

    2009-01-01T23:59:59.000Z

    Tool for Displacement Ventilation: User Notes 2|Page 5.air  temperature.   Ventilation effectiveness is equivalent for Displacement  Ventilation (Chen and Glicksman 2003).  

  2. Infiltration in ASHRAE's Residential Ventilation Standards

    E-Print Network [OSTI]

    Sherman, Max

    2008-01-01T23:59:59.000Z

    of  the effective natural ventilation rate with weather to  Residential  Ventilation  Requirements”.  LBNL  57236.  and  M.H.   Sherman  "Ventilation  Behavior  and  Household 

  3. Equivalence in Ventilation and Indoor Air Quality

    E-Print Network [OSTI]

    Sherman, Max

    2012-01-01T23:59:59.000Z

    event, the intermittent ventilation equations of Sherman,of the energy impact of ventilation and associated financialReview of Residential Ventilation Technologies. Berkeley,

  4. Design methods for displacement ventilation: Critical review.

    E-Print Network [OSTI]

    Schiavon, Stefano

    2006-01-01T23:59:59.000Z

    Displacement ventilation in non-industrial premises, REHVADisplacement ventilation in non-industrial premises, REHVAof displacement ventilation in non-industrial premises. The

  5. Equivalence in Ventilation and Indoor Air Quality

    E-Print Network [OSTI]

    Sherman, Max

    2012-01-01T23:59:59.000Z

    the use of mechanical ventilation systems in the same way asand operating ventilation systems with variable amounts ofto determine the ventilation system’s operation. We presume

  6. Infiltration in ASHRAE's Residential Ventilation Standards

    E-Print Network [OSTI]

    Sherman, Max

    2008-01-01T23:59:59.000Z

    often need mechanical ventilation systems to meet current about mechanical ventilation systems but has a default unbalanced mechanical ventilation systems change  the 

  7. Recovery Act-Funded HVAC projects

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy was allocated funding from the American Recovery and Reinvestment Act to conduct research into heating, ventilation, and air conditioning (HVAC) technologies and...

  8. Natural ventilation and acoustic comfort A. Chilton, P. Novo, N. McBride, A. Lewis-Nunes, I. Johnston and J. Rene

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . This means that it is harder to closely regulate natural ventilation, which can result in additional heat-losses during the heating season. There is also less potential for heat-recovery in natural ventilation systemsNatural ventilation and acoustic comfort A. Chilton, P. Novo, N. McBride, A. Lewis-Nunes, I

  9. Density-Enthalpy Phase Diagram 0D Boiler Simulation

    E-Print Network [OSTI]

    Vuik, Kees

    Diagram 0D Boiler Simulation Finite Element Method Further Research Mass and Heat balances V d dt = i - eDensity-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research Finite Transitions #12;Density-Enthalpy Phase Diagram 0D Boiler Simulation Finite Element Method Further Research

  10. Enthalpy transients in fractured two-phase geothermal systems

    SciTech Connect (OSTI)

    Lippmann, M.J.; Bodvarsson, G.S.; Gaulke, S.W.

    1985-03-01T23:59:59.000Z

    Numerical modeling techniques are used to study the changes in flowing enthalpy of fluids produced from a well completed in a fractured two-phase geothermal reservoir. Complex interactions between different fracture and porous matrix parameters control the enthalpy transients. The results show that the flowing enthalpy is most sensitive to the characteristics of the relative permeability curves, the magnitude of the matrix permeability and the effective fracture porosity. Other parameters such as the thermal conductivity and fracture spacing also significantly affect the flowing enthalpy. In spite of the complex phenomena associated with enthalpy transients in fractured two-phase systems, it is possible to infer useful information about the producing geothermal reservoirs from field data. 15 refs., 13 figs., 2 tabs.

  11. Ventilation technologies scoping study

    SciTech Connect (OSTI)

    Walker, Iain S.; Sherman, Max H.

    2003-09-30T23:59:59.000Z

    This document presents the findings of a scoping study commissioned by the Public Interest Energy Research (PIER) program of the California Energy Commission to determine what research is necessary to develop new residential ventilation requirements for California. This study is one of three companion efforts needed to complete the job of determining the needs of California, determining residential ventilation requirements, and determining appropriate ventilation technologies to meet these needs and requirements in an energy efficient manner. Rather than providing research results, this scoping study identifies important research questions along with the level of effort necessary to address these questions and the costs, risks, and benefits of pursuing alternative research questions. In approaching these questions and level of effort, feasibility and timing were important considerations. The Commission has specified Summer 2005 as the latest date for completing this research in time to update the 2008 version of California's Energy Code (Title 24).

  12. Meeting Residential Ventilation Standards Through Dynamic Control of Ventilation Systems

    SciTech Connect (OSTI)

    Sherman, Max H.; Walker, Iain S.

    2011-04-01T23:59:59.000Z

    Existing ventilation standards, including American Society of Heating, Refrigerating, and Air-conditioning Engineers (ASHRAE) Standard 62.2, specify continuous operation of a defined mechanical ventilation system to provide minimum ventilation, with time-based intermittent operation as an option. This requirement ignores several factors and concerns including: other equipment such as household exhaust fans that might incidentally provide ventilation, negative impacts of ventilation when outdoor pollutant levels are high, the importance of minimizing energy use particularly during times of peak electricity demand, and how the energy used to condition air as part of ventilation system operation changes with outdoor conditions. Dynamic control of ventilation systems can provide ventilation equivalent to or better than what is required by standards while minimizing energy costs and can also add value by shifting load during peak times and reducing intake of outdoor air contaminants. This article describes the logic that enables dynamic control of whole-house ventilation systems to meet the intent of ventilation standards and demonstrates the dynamic ventilation system control concept through simulations and field tests of the Residential Integrated Ventilation-Energy Controller (RIVEC).

  13. Innovative Energy Efficient Industrial Ventilation

    E-Print Network [OSTI]

    Litomisky, A.

    2005-01-01T23:59:59.000Z

    factories, we found striking dichotomy between the classical “static” design of ventilation systems and constantly changing workflow and business demands. Using data from real factories, we are able to prove that classical industrial ventilation design...

  14. RESIDENTIAL VENTILATION AND ENERGY CHARACTERISTICS*

    E-Print Network [OSTI]

    RESIDENTIAL VENTILATION AND ENERGY CHARACTERISTICS* Max Sherman Nance Matson Energy Performance Berkeley, California The role of ventilation in the housing stock is to provide fresh air and to dilute to provide this ventilation service, either directly for moving the air or indirectly for conditioning

  15. 3, 805826, 2006 Ventilation under

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    OSD 3, 805­826, 2006 Ventilation under global warming A. Gnanadesikan et al. Title Page Abstract ocean ventilation change under global warming? A. Gnanadesikan 1 , J. L. Russell 2 , and F. Zeng 3 1­826, 2006 Ventilation under global warming A. Gnanadesikan et al. Title Page Abstract Introduction

  16. The International Journal of Ventilation

    E-Print Network [OSTI]

    California at Davis, University of

    air quality and reducing energy required for heating, cooling, and ventilation. One application. Introduction Heating, cooling and ventilation can account for 50 percent of total building energy useThe International Journal of Ventilation Volume 12 Number 4 ISSN 1473 - 3315 March 2014 Contents

  17. Measure Guideline: Ventilation Cooling

    SciTech Connect (OSTI)

    Springer, D.; Dakin, B.; German, A.

    2012-04-01T23:59:59.000Z

    The purpose of this measure guideline on ventilation cooling is to provide information on a cost-effective solution for reducing cooling system energy and demand in homes located in hot-dry and cold-dry climates. This guideline provides a prescriptive approach that outlines qualification criteria, selection considerations, and design and installation procedures.

  18. Ventilation efficiencies of a desk-edge-mounted task ventilation system

    E-Print Network [OSTI]

    Faulkner, David; Fisk, William J.; Sullivan, Douglas P.; Lee, Seung Min

    2002-01-01T23:59:59.000Z

    DESK-EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner * , WJthe effectiveness of a task ventilation system with an airthe desk. The task ventilation system provided outside air,

  19. ASHRAE and residential ventilation

    SciTech Connect (OSTI)

    Sherman, Max H.

    2003-10-01T23:59:59.000Z

    In the last quarter of a century, the western world has become increasingly aware of environmental threats to health and safety. During this period, people psychologically retreated away from outdoors hazards such as pesticides, smog, lead, oil spills, and dioxin to the seeming security of their homes. However, the indoor environment may not be healthier than the outdoor environment, as has become more apparent over the past few years with issues such as mold, formaldehyde, and sick-building syndrome. While the built human environment has changed substantially over the past 10,000 years, human biology has not; poor indoor air quality creates health risks and can be uncomfortable. The human race has found, over time, that it is essential to manage the indoor environments of their homes. ASHRAE has long been in the business of ventilation, but most of the focus of that effort has been in the area of commercial and institutional buildings. Residential ventilation was traditionally not a major concern because it was felt that, between operable windows and envelope leakage, people were getting enough outside air in their homes. In the quarter of a century since the first oil shock, houses have gotten much more energy efficient. At the same time, the kinds of materials and functions in houses changed in character in response to people's needs. People became more environmentally conscious and aware not only about the resources they were consuming but about the environment in which they lived. All of these factors contributed to an increasing level of public concern about residential indoor air quality and ventilation. Where once there was an easy feeling about the residential indoor environment, there is now a desire to define levels of acceptability and performance. Many institutions--both public and private--have interests in Indoor Air Quality (IAQ), but ASHRAE, as the professional society that has had ventilation as part of its mission for over 100 years, is the logical place to provide leadership. This leadership has been demonstrated most recently by the publication of the first nationally recognized standard on ventilation in homes, ASHRAE Standard 62.2-2003, which builds on work that has been part of ASHRAE for many years and will presumably continue. Homeowners and occupants, which includes virtually all of us, will benefit from the application of Standard 62.2 and use of the top ten list. This activity is exactly the kind of benefit to society that the founders of ASHRAE envisioned and is consistent with ASHRAE's mission and vision. ASHRAE members should be proud of their Society for taking leadership in residential ventilation.

  20. Ventilation | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative JC3 RSS SeptemberRenewable Energy,Geothermal3: RedAbout(Brochure),Ventilation

  1. Ventilation Behavior and Household Characteristics in New California Houses

    E-Print Network [OSTI]

    Price, Phillip N.; Sherman, Max H.

    2006-01-01T23:59:59.000Z

    IAQ, mechanical ventilation systems, ventilation standards,to have mechanical ventilation systems resulted in anotherhave and use mechanical ventilation systems; and what is the

  2. Lightweight ventilated facade prototype: acoustic performance evaluation when the ventilation surface of

    E-Print Network [OSTI]

    Boyer, Edmond

    Lightweight ventilated facade prototype: acoustic performance evaluation when the ventilation Conference 23-27 April 2012, Nantes, France 3801 #12;1. INTRODUCTION Lightweight ventilated facades cavity is almost totally open, fully ventilated and not very wide. Therefore, its contribution

  3. Noninvasive Positive Pressure Ventilation in the Emergency

    E-Print Network [OSTI]

    Noninvasive Positive Pressure Ventilation in the Emergency Department Mei-Ean Yeow, MDa , Jairo I, 1411 East 31st Street, Oakland, CA 94602-1018, USA Noninvasive ventilation is defined as the provision ventilators consist of both negative and positive pressure ventilators. Because negative pressure ventilation

  4. Laboratory Ventilation SafetyLaboratory Ventilation Safety J. Scott WardJ. Scott Ward

    E-Print Network [OSTI]

    Farritor, Shane

    Laboratory Ventilation SafetyLaboratory Ventilation Safety J. Scott WardJ. Scott Ward #12;In 1925. Labconco CorporationLabconco Corporation #12;Laboratory VentilationLaboratory Ventilation #12;Laboratory Ventilation ProductsLaboratory Ventilation Products #12;History of Fume HoodsHistory of Fume Hoods Thomas

  5. Ventilation | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you sure you wantJoin us for|Idahothe NewUtility-Scale Solar throughVentilation

  6. Smart Ventilation - RIVEC

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretary ofSmall BusinessSecondary Ventilation Activity Inputs

  7. Natural vs. mechanical ventilation and cooling.

    E-Print Network [OSTI]

    Brager, Gail; Alspach, Peter; Nall, Daniel H.

    2011-01-01T23:59:59.000Z

    the drawbacks of each type of ventilation system helps theThe benefits of natural ventilation for occupants in com-In the strictest sense, “ventilation” refers to the exchange

  8. Air Distribution Effectiveness for Different Mechanical Ventilation

    E-Print Network [OSTI]

    LBNL-62700 Air Distribution Effectiveness for Different Mechanical Ventilation Systems Max H Effectiveness for Different Mechanical Ventilation Systems Max H. Sherman and Iain S. Walker Lawrence Berkeley National Laboratory, USA ABSTRACT The purpose of ventilation is to dilute indoor contaminants

  9. Reverse ventilation--perfusion mismatch

    SciTech Connect (OSTI)

    Palmaz, J.C.; Barnett, C.A.; Reich, S.B.; Krumpe, P.E.; Farrer, P.A.

    1984-01-01T23:59:59.000Z

    Patients having lobar airway obstruction or consolidation usually have decreases of both ventilation and perfusion on lung scans. We report three patients in whom hypoxic vasoconstriction was apparently incomplete, resulting in a ''reversed'' ventilation-perfusion mismatch. Perfusion of the hypoxic lobe on the radionuclide scan was associated with metabolic alkalosis, pulmonary venous and pulmonary arterial hypertension in these patients.

  10. Building America Webinar: Ventilation in Multifamily Buildings...

    Energy Savers [EERE]

    Ventilation in Multifamily Buildings Building America Webinar: Ventilation in Multifamily Buildings This webinar was presented by research team Consortium for Advanced Residential...

  11. FAQS Qualification Card - Confinement Ventilation and Process...

    Office of Environmental Management (EM)

    Confinement Ventilation and Process Gas Treatment FAQS Qualification Card - Confinement Ventilation and Process Gas Treatment A key element for the Department's Technical...

  12. Retrofit Ventilation Strategies in Multifamily Buildings Webinar...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Retrofit Ventilation Strategies in Multifamily Buildings Webinar Retrofit Ventilation Strategies in Multifamily Buildings Webinar Slides from the Building America webinar on...

  13. Solar Ventilation Preheating Resources and Technologies | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Ventilation Preheating Resources and Technologies Solar Ventilation Preheating Resources and Technologies Photo of a dark brown perforated metal wall is pictured on the side of an...

  14. Cardiac gated ventilation

    SciTech Connect (OSTI)

    Hanson, C.W. III [Hospital of the Univ. of Pennsylvania, Philadelphia, PA (United States). Dept. Anesthesia; Hoffman, E.A. [Univ. of Iowa College of Medicine, Iowa City, IA (United States). Div. of Physiologic Imaging

    1995-12-31T23:59:59.000Z

    There are several theoretic advantages to synchronizing positive pressure breaths with the cardiac cycle, including the potential for improving distribution of pulmonary and myocardial blood flow and enhancing cardiac output. The authors evaluated the effects of synchronizing respiration to the cardiac cycle using a programmable ventilator and electron beam CT (EBCT) scanning. The hearts of anesthetized dogs were imaged during cardiac gated respiration with a 50 msec scan aperture. Multi slice, short axis, dynamic image data sets spanning the apex to base of the left ventricle were evaluated to determine the volume of the left ventricular chamber at end-diastole and end-systole during apnea, systolic and diastolic cardiac gating. The authors observed an increase in cardiac output of up to 30% with inspiration gated to the systolic phase of the cardiac cycle in a non-failing model of the heart.

  15. Literature Review of Displacement Ventilation 

    E-Print Network [OSTI]

    Cho, S.; Im, P.; Haberl, J. S.

    2005-01-01T23:59:59.000Z

    . Energy Systems Laboratory, Texas A&M University System Page 9 IV. REFERENCES Chen, Q., Glicksman, L.R., Yuan, X., Hu, S. Yang, X. 1999. Performance evaluation and development of design guidelines for displacement ventilation, Final report... testing, and a tracer gas (CO 2 ) step-up procedure. Alamdari, F., Butler, D.J.G., Grigg, P.F., Shaw, M. R. 1998. Chilled ceilings and displacement ventilation. Renewable Energy, Vol. 15, Issues 1-4, pp. 300-305. Abstract: Displacement ventilation...

  16. Ventilation Based on ASHRAE 62.2

    E-Print Network [OSTI]

    Indoor Ventilation Based on ASHRAE 62.2 Arnold Schwarzenegger Governor California Energy Commission Ventilation (ASHRAE 62.2) Minimum Best Practices Guide - Exhaust-Only Ventilation Introduction: The California/ASHRAE Standard 62.2-2007, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings (ASHRAE

  17. Laboratory Ventilation Management Ralph Stuart, CHO

    E-Print Network [OSTI]

    Pawlowski, Wojtek

    Laboratory Ventilation Management Program Ralph Stuart, CHO Ellen Sweet, Laboratory Ventilation Specialist Cornell Department of Environmental Health and Safety 3/29/2013 #12;Laboratory Ventilation.1.2 Design and Construction Standards 10 7.1.3 Carbon Dioxide Ventilation Effectiveness Protocol 10 7.2 Job

  18. STATE OF CALIFORNIA MECHANICAL VENTILATION AND REHEAT

    E-Print Network [OSTI]

    STATE OF CALIFORNIA MECHANICAL VENTILATION AND REHEAT CEC-MECH-3C (Revised 08/09) CALIFORNIA ENERGY COMMISSION MECHANICAL VENTILATION AND REHEAT MECH-3C PROJECT NAME DATE MECHANICAL VENTILATION §121(b)2 REHEAT'D V.A. Max of D or G Design Ventilation Air cfm 50% of Design Zone Supply cfm B x 0.4 cfm/ft² Max

  19. Equivalence in Ventilation and Indoor Air Quality

    SciTech Connect (OSTI)

    Sherman, Max; Walker, Iain; Logue, Jennifer

    2011-08-01T23:59:59.000Z

    We ventilate buildings to provide acceptable indoor air quality (IAQ). Ventilation standards (such as American Society of Heating, Refrigerating, and Air-Conditioning Enginners [ASHRAE] Standard 62) specify minimum ventilation rates without taking into account the impact of those rates on IAQ. Innovative ventilation management is often a desirable element of reducing energy consumption or improving IAQ or comfort. Variable ventilation is one innovative strategy. To use variable ventilation in a way that meets standards, it is necessary to have a method for determining equivalence in terms of either ventilation or indoor air quality. This study develops methods to calculate either equivalent ventilation or equivalent IAQ. We demonstrate that equivalent ventilation can be used as the basis for dynamic ventilation control, reducing peak load and infiltration of outdoor contaminants. We also show that equivalent IAQ could allow some contaminants to exceed current standards if other contaminants are more stringently controlled.

  20. Literature Review of Displacement Ventilation

    E-Print Network [OSTI]

    Cho, S.; Im, P.; Haberl, J. S.

    Performance Evaluation and Design Guidelines for Displacement Ventilation” by Chen and Clicksman (2003), were used to begin the literature search. Their references include papers, articles, and web sites presenting major contributions to the understanding...

  1. Ventilation efficiencies and thermal comfort results of a desk-edge-mounted task ventilation system

    E-Print Network [OSTI]

    Faulkner, D.; Fisk, W.J.; Sullivan, D.P.; Lee, S.M.

    2003-01-01T23:59:59.000Z

    EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner, WJ Fisk, DPDESK-EDGE-MOUNTED TASK VENTILATION SYSTEM D Faulkner * , WJcomfort of a task ventilation system with an air supply

  2. Multifamily Individual Heating and Ventilation Systems, Lawrence, Massachusetts (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-11-01T23:59:59.000Z

    The conversion of an older Massachusetts building into condominiums illustrates a safe, durable, and cost-effective solution for heating and ventilation systems that can potentially benefit millions of multifamily buildings. Merrimack Valley Habitat for Humanity (MVHfH) partnered with U.S. Department of Energy Building America team Building Science Corporation (BSC) to provide high performance affordable housing for 10 families in the retrofit of an existing mass masonry building (a former convent). The original ventilation design for the project was provided by a local engineer and consisted of a single large heat recovery ventilator (HRV) located in a mechanical room in the basement with a centralized duct system providing supply air to the main living space and exhausting stale air from the single bathroom in each apartment. This design was deemed to be far too costly to install and operate for several reasons: the large central HRV was oversized and the specified flows to each apartment were much higher than the ASHRAE 62.2 rate; an extensive system of ductwork, smoke and fire dampers, and duct chases were specified; ductwork required a significant area of dropped ceilings; and the system lacked individual ventilation control in the apartments

  3. Energy saving strategies with personalized ventilation in tropics

    E-Print Network [OSTI]

    Schiavon, Stefano; Melikov, Arsen; Chandra Sekhar, Chandra Sekhar

    2010-01-01T23:59:59.000Z

    integrated personalized ventilation for minimizing crossMelikov, Personalized ventilation, Indoor Air, vol. 14 (to personalized and mixing ventilation, Indoor Air 14 (

  4. Quantitative relationship of sick building syndrome symptoms with ventilation rates

    E-Print Network [OSTI]

    Fisk, William J.

    2009-01-01T23:59:59.000Z

    P. Miettinen (1995). "Ventilation rate in office buildings2005). Outdoor air ventilation and work- related symptoms inand Q. H. Lei (2006). "Ventilation and performance in office

  5. Measured Air Distribution Effectiveness for Residential Mechanical Ventilation Systems

    E-Print Network [OSTI]

    Sherman, Max H.

    2008-01-01T23:59:59.000Z

    6 th AIVC Conference “Ventilation Strategies and MeasurementAir Infiltration and Ventilation Centre, U.K. 1985REFERENCES ASHRAE. 2007. “Ventilation for Acceptable Indoor

  6. Optimization of Occupancy Based Demand Controlled Ventilation in Residences

    E-Print Network [OSTI]

    Mortensen, Dorthe K.

    2012-01-01T23:59:59.000Z

    of intermittent ventilation for providing acceptable indoor253. CEN, EN15665: Ventilation for buildings - Determiningcriteria for residential ventilation systems, 2009. CEN,

  7. Summary of Workshop: Barriers to Energy Efficient Residential Ventilation

    E-Print Network [OSTI]

    Sherman, Max

    2008-01-01T23:59:59.000Z

    Improved controls for ventilation systems, including betterEfficient Residential Ventilation Held on January 10, 2008Consumers Manufacturers / Ventilation Industry Public Sector

  8. AUTOMATIC VARIABLE VENTILATION CONTROL SYSTEMS BASED ON AIR QUALITY DETECTION

    E-Print Network [OSTI]

    Turiel, Isaac

    2011-01-01T23:59:59.000Z

    saon Automatic Variable Ventilation Control Systems Based onL Kusuda, "Control Ventilation to Conserve Energy While t·79-3 Automatic variable ventilation control systems based on

  9. New Air Cleaning Strategies for Reduced Commercial Building Ventilation Energy

    E-Print Network [OSTI]

    Sidheswaran, Meera

    2010-01-01T23:59:59.000Z

    VOCs substitute for ventilation in commercial buildings? ."Gorfain J (2008). Analysis of ventilation data from the U.S.Commercial Building Ventilation Energy Meera Sidheswaran,

  10. On The Valuation of Infiltration towards Meeting Residential Ventilation Needs

    E-Print Network [OSTI]

    Sherman, Max H.

    2008-01-01T23:59:59.000Z

    Related to Residential Ventilation Requirements”. LBNLP.N. and M.H. Sherman "Ventilation Behavior and HouseholdReview of Residential Ventilation Technologies”, LBNL 57730.

  11. Advanced Controls and Sustainable Systems for Residential Ventilation

    E-Print Network [OSTI]

    1 Advanced Controls and Sustainable Systems for Residential Ventilation William J.N. Turner & Iain..................................................................................................................... 8 Residential Ventilation Standards..........................................................................................9 Passive and Hybrid Ventilation

  12. Energy-saving strategies with personalized ventilation in cold climates

    E-Print Network [OSTI]

    Schiavon, Stefano; Melikov, Arsen

    2009-01-01T23:59:59.000Z

    Journal of heating, Ventilation and Refrigeration Research,on Cold Climate, Heating, Ventilation and Air-Conditioning,Ventilation Effectiveness, Federation of European Heating

  13. CO2 MONITORING FOR DEMAND CONTROLLED VENTILATION IN COMMERCIAL BUILDINGS

    E-Print Network [OSTI]

    Fisk, William J.

    2010-01-01T23:59:59.000Z

    use of demand control ventilation systems in general officethe demand controlled ventilation system increased the ratedemand controlled ventilation systems will, because of poor

  14. Energy saving strategies with personalized ventilation in tropics

    E-Print Network [OSTI]

    Schiavon, Stefano; Melikov, Arsen; Chandra Sekhar, Chandra Sekhar

    2010-01-01T23:59:59.000Z

    of a personalized ventilation system in the tropics, in:edged-mounted task ventilation system, Indoor Air, Vol. 14 (a chair-based personalized ventilation system, Building and

  15. Optimization of Occupancy Based Demand Controlled Ventilation in Residences

    E-Print Network [OSTI]

    Mortensen, Dorthe K.

    2012-01-01T23:59:59.000Z

    for residential ventilation systems, 2009. CEN, EN15251:The demand controlled ventilation system operated at a lowthe whole house ventilation system that implicitly assumes

  16. Energy-saving strategies with personalized ventilation in cold climates

    E-Print Network [OSTI]

    Schiavon, Stefano; Melikov, Arsen

    2009-01-01T23:59:59.000Z

    potential of personalized ventilation system in the tropics,edged-mounted task ventilation system, Indoor Air, Vol. 14 (a chair-based personalized ventilation system, Building and

  17. On The Valuation of Infiltration towards Meeting Residential Ventilation Needs

    E-Print Network [OSTI]

    Sherman, Max H.

    2008-01-01T23:59:59.000Z

    from steady mechanical ventilation system. For the case ofbecause unbalanced mechanical ventilation systems change theoften need mechanical ventilation systems to meet current

  18. AUTOMATIC VARIABLE VENTILATION CONTROL SYSTEMS BASED ON AIR QUALITY DETECTION

    E-Print Network [OSTI]

    Turiel, Isaac

    2011-01-01T23:59:59.000Z

    SUt1t1ARY Mechanical ventilation systems usually provide aof any 02 based ventilation system is that a ventilationwith type of ventilation system~ weather conditions, and

  19. Advanced Controls and Sustainable Systems for Residential Ventilation

    E-Print Network [OSTI]

    Turner, William J.N.

    2014-01-01T23:59:59.000Z

    through dynamic control of ventilation systems. Energy andcontinuous mechanical ventilation systems a mean annualcompliant ASHRAE 62.2 ventilation system. Table 12: Average

  20. AUTOMATIC VARIABLE VENTILATION CONTROL SYSTEMS BASED ON AIR QUALITY DETECTION

    E-Print Network [OSTI]

    Turiel, Isaac

    2011-01-01T23:59:59.000Z

    ~saon Automatic Variable Ventilation Control Systems Based79-3 Automatic variable ventilation control systems based onof automatic variable ventilation control systems, result in

  1. Classroom HVAC: Improving ventilation and saving energy -- field study plan

    E-Print Network [OSTI]

    Apte, Michael G.; Faulkner, David; Hodgson, Alfred T.; Sullivan, Douglas P.

    2004-01-01T23:59:59.000Z

    in this study. Classroom HVAC: Improving Ventilation andV8doc.sas.com/sashtml. Classroom HVAC: Improving VentilationBerkeley, CA 94720. Classroom HVAC: Improving Ventilation

  2. Measurements of excess enthalpy in ultrafine-grained titanium dioxide

    SciTech Connect (OSTI)

    Terwilliger, C.D.; Chiang, Y.M. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Materials Science and Engineering

    1995-08-01T23:59:59.000Z

    Differential scanning calorimetry has been used to make direct measurements of the excess enthalpy of TiO{sub 2} (rutile) with an initial grain size of 30--70 nm. When the heat released during grain growth is normalized to the change in grain boundary area, the specific excess enthalpy at low temperature sn the fine grain sizes (600--780 C, 30--200 nm) is found to be 0.5--1 J/m{sup 2}, while values averaged over a larger temperature and size range (600--1,300 C, 30 nm-{approximately} 2 {micro}m) are 1.3--1.7 J/m{sup 2}. After exclusion of extraneous contributions from other heat-dissipating processes, origins of a specific grain boundary enthalpy that increases with grain size or temperature are considered, including solute segregation, changes in grain boundary structure, and contributions from grain boundary triple junctions. It is concluded that the most plausible explanation is a size-dependent nonstoichiometry of TiO{sub 2} due to the impingement of space charge layers in the temperature and grain size range of the experiments.

  3. Residential ventilation standards scoping study

    SciTech Connect (OSTI)

    McKone, Thomas E.; Sherman, Max H.

    2003-10-01T23:59:59.000Z

    The goals of this scoping study are to identify research needed to develop improved ventilation standards for California's Title 24 Building Energy Efficiency Standards. The 2008 Title 24 Standards are the primary target for the outcome of this research, but this scoping study is not limited to that timeframe. We prepared this scoping study to provide the California Energy Commission with broad and flexible options for developing a research plan to advance the standards. This document presents the findings of a scoping study commissioned by the Public Interest Energy Research (PIER) program of the California Energy Commission to determine what research is necessary to develop new residential ventilation requirements for California. This study is one of three companion efforts needed to complete the job of determining the ventilation needs of California residences, determining the bases for setting residential ventilation requirements, and determining appropriate ventilation technologies to meet these needs and requirements in an energy efficient manner. Rather than providing research results, this scoping study identifies important research questions along with the level of effort necessary to address these questions and the costs, risks, and benefits of pursuing alternative research questions. In approaching these questions and corresponding levels of effort, feasibility and timing were important considerations. The Commission has specified Summer 2005 as the latest date for completing this research in time to update the 2008 version of California's Energy Code (Title 24).

  4. Laboratories for the 21st Century: Best Practices; Energy Recovery in Laboratory Facilities (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2012-06-01T23:59:59.000Z

    This guide regarding energy recovery is one in a series on best practices for laboratories. It was produced by Laboratories for the 21st Century ('Labs 21'), a joint program of the U.S. Environmental Protection Agency and the U.S. Department of Energy. Laboratories typically require 100% outside air for ventilation at higher rates than other commercial buildings. Minimum ventilation is typically provided at air change per hour (ACH) rates in accordance with codes and adopted design standards including Occupational Safety and Health Administration (OSHA) Standard 1910.1450 (4 to 12 ACH - non-mandatory) or the 2011 American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Applications Handbook, Chapter 16 - Laboratories (6 to 12 ACH). While OSHA states this minimum ventilation rate 'should not be relied on for protection from toxic substances released into the laboratory' it specifically indicates that it is intended to 'provide a source of air for breathing and for input to local ventilation devices (e.g., chemical fume hoods or exhausted bio-safety cabinets), to ensure that laboratory air is continually replaced preventing the increase of air concentrations of toxic substances during the working day, direct air flow into the laboratory from non-laboratory areas and out to the exterior of the building.' The heating and cooling energy needed to condition and move this outside air can be 5 to 10 times greater than the amount of energy used in most office buildings. In addition, when the required ventilation rate exceeds the airflow needed to meet the cooling load in low-load laboratories, additional heating energy may be expended to reheat dehumidified supply air from the supply air condition to prevent over cooling. In addition to these low-load laboratories, reheat may also be required in adjacent spaces such as corridors that provide makeup air to replace air being pulled into negative-pressure laboratories. Various types of energy recovery devices and systems can substantially reduce heating and cooling energy required for conditioning spaces in laboratories. Heating and cooling systems can be downsized when energy recovery is used because these systems reduce peak heating and cooling requirements. Heating and cooling systems can also be downsized by capturing heat generated in high-load spaces and transferring it to spaces requiring reheat. There are many opportunities for energy recovery in laboratories. This guide includes descriptions of several air-to-air energy recovery devices and methods, such as using enthalpy wheels (Figure 1), heat pipes, or run-around loops in new construction. These devices generally recover energy from exhaust air. This recovered energy is used to precondition supply air during both cooling and heating modes of operation. In addition to air-to-air energy recovery options, this guide includes a description of a water-to-water heat recovery system that collects heat from high-load spaces and transfers it to spaces that require reheat. While air-to-air recovery devices provide significant energy reduction, in some laboratory facilities the amount of energy available in the exhaust air exceeds the pre-heat and pre-cooling needed to maintain supply air conditions. During these periods of time, controls typically reduce the energy recovery capacity to match the reduced load. If the energy recovered in the exhaust is not needed then it is rejected from the facility. By using a water-to-water recovery system, it is possible to significantly reduce overall building energy use by reusing heating or cooling energy generated in the building before it is rejected to the outdoors. Laboratory managers are encouraged to perform a life-cycle cost analysis of an energy-recovery technology to determine the feasibility of its application in their laboratory. Usually, the shortest payback periods occur when the heating and cooling load reduction provided by an energy recovery system allows the laboratory to install and use smaller heating (e.g., hot water or steam) and cooling (e.g., c

  5. Summary of Workshop: Barriers to Energy Efficient Residential Ventilation

    E-Print Network [OSTI]

    Sherman, Max

    2008-01-01T23:59:59.000Z

    for whole-house ventilation, local exhaust ventilation,by mechanical ventilation. Standard 62.2 also requires localVentilation • Mechanical system meeting Section 4 or 'other methods" when approved by LDP • Local

  6. Equivalence in Ventilation and Indoor Air Quality

    E-Print Network [OSTI]

    Sherman, Max

    2012-01-01T23:59:59.000Z

    dryers, and other local ventilation. ? Occupant activitiesventilation such as that provided by economizers or intermittent locallocal kitchen and bath exhausts, but a large part of the standard focuses on the continuous mechanical whole-house ventilation.

  7. SIMPLIFIED METHODS FOR COMBINING MECHANICAL VENTILATION AND NATURAL INFILTRATION

    E-Print Network [OSTI]

    Modera, M.

    2011-01-01T23:59:59.000Z

    of Heating and Ventilating, Royal Institute of Technology,Heating and Ventilating The Royal Institute of Technology

  8. Ventilation-Synchronous Magnetic Resonance Microscopy of Pulmonary Structure and Ventilation in

    E-Print Network [OSTI]

    Ventilation-Synchronous Magnetic Resonance Microscopy of Pulmonary Structure and Ventilation helium (3 He) gas to acquire images that dem- onstrate pulmonary vasculature and ventilated airways of these structures relative to the less vascular surrounding tissues. A constant- flow ventilator was developed

  9. We compared the efficacy of positive pressure ventilation (PPV) vs negative pressure ventilation (NPV) in providing

    E-Print Network [OSTI]

    Shadmehr, Reza

    the rationale for the use ofintermittent assisted ventilation is based on the premise that it alleviates muscleWe compared the efficacy of positive pressure ventilation (PPV) vs negative pressure ventilationEMG), minute ventilation (VE),tidal volume (VT), and end-tidal CO (etCOÃ during 15 minutes of PPV and NPV

  10. Building America Webinar: Retrofit Ventilation Strategies in...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Strategies in Multifamily Buildings Webinar Building America Webinar: Retrofit Ventilation Strategies in Multifamily Buildings Webinar This webinar, presented by...

  11. Procedures and Standards for Residential Ventilation System

    E-Print Network [OSTI]

    1 Procedures and Standards for Residential Ventilation System Commissioning: An Annotated and by the California Energy Commission under Pier Contract 500-08-061. Key terms: residential, ventilation.C. and C.P. Wray. 2013. Procedures and Standards for Residential Ventilation System Commissioning

  12. Reduceret energiforbrug til ventilation af bygninger

    E-Print Network [OSTI]

    Reduceret energiforbrug til ventilation af bygninger hvori der systematisk er valgt lav. 23. November 2007 #12;#12;Reduced energy use for ventilation of buildings through selection of low ventilation rate on perceived quality of air polluted by different materials, small ­ scale and full ­ scale

  13. Humidity Implications for Meeting Residential Ventilation Requirements

    E-Print Network [OSTI]

    1 LBNL-62182 Humidity Implications for Meeting Residential Ventilation Requirements Iain S. Walker for Meeting Residential Ventilation Requirements ABSTRACT In 2003 ASHRAE approved the nation's first residential ventilation standard, ASHRAE Standard 62.2. Because meeting this standard can significantly change

  14. Hysteresis effects in hybrid building ventilation

    E-Print Network [OSTI]

    Flynn, Morris R.

    = Heating, ventilation & air conditioning Buildings and energy consumption #12;· Notwithstanding this energy-breeze, displacement ventilation dissipate internal heat gains e.g. from kitchen stove · Wintertime: Spaces filledHysteresis effects in hybrid building ventilation Morris R. Flynn Dept. of Mechanical & Aerospace

  15. Nuclear reactor control rod cluster for enthalpy rise compensation

    SciTech Connect (OSTI)

    Freeman, T.R.

    1987-07-07T23:59:59.000Z

    This patent describes a control arrangement for use with a nuclear fuel assembly having guide thimbles to provide enthalpy rise compensation, comprising: (a) a spider assembly; and (b) control rodlets containing neutron absorber material, supported at their upper ends from the spider assembly in a pattern which matches that of the guide thimbles and extending generally parallel to one another downwardly for insertion into the guide thimbles of the fuel assembly; (c) the control rodlets arranged in a cluster having a higher axial neutron absorption capability at an upper portion than at a lower portion; each control rodlet varying in axial neutron absorption capability from every other rodlet.

  16. Air change effectiveness in laboratory tests of combined chilled ceiling and displacement ventilation.

    E-Print Network [OSTI]

    Schiavon, Stefano; Bauman, Fred; Tully, Brad; Rimmer, Julian

    2011-01-01T23:59:59.000Z

    for Displacement Ventilation. Atlanta: ASHRAE. ISO. 1993.ceiling and displacement ventilation systems. Energy andceiling and displacement ventilation systems. Submitted to

  17. 16 P R O G R E S S R E S E a R c h & D i S c O v E R y Nu-Air Ventilation Systems began nearly three

    E-Print Network [OSTI]

    Brownstone, Rob

    three decades ago designing and manufacturing heat recovery ventilation (HRV) systems--vital pieceLeft)JulioMilitzerandBrianGibbon SandorFizli sector: Heating and ventilation Mission: Nu-Air is an important supplier of air exchanger16 P R O G R E S S R E S E a R c h & D i S c O v E R y Nu-Air Ventilation Systems began nearly

  18. Development of a Residential Integrated Ventilation Controller

    SciTech Connect (OSTI)

    Staff Scientist; Walker, Iain; Sherman, Max; Dickerhoff, Darryl

    2011-12-01T23:59:59.000Z

    The goal of this study was to develop a Residential Integrated Ventilation Controller (RIVEC) to reduce the energy impact of required mechanical ventilation by 20percent, maintain or improve indoor air quality and provide demand response benefits. This represents potential energy savings of about 140 GWh of electricity and 83 million therms of natural gas as well as proportional peak savings in California. The RIVEC controller is intended to meet the 2008 Title 24 requirements for residential ventilation as well as taking into account the issues of outdoor conditions, other ventilation devices (including economizers), peak demand concerns and occupant preferences. The controller is designed to manage all the residential ventilation systems that are currently available. A key innovation in this controller is the ability to implement the concept of efficacy and intermittent ventilation which allows time shifting of ventilation. Using this approach ventilation can be shifted away from times of high cost or high outdoor pollution towards times when it is cheaper and more effective. Simulations, based on the ones used to develop the new residential ventilation requirements for the California Buildings Energy code, were used to further define the specific criteria and strategies needed for the controller. These simulations provide estimates of the energy, peak power and contaminant improvement possible for different California climates for the various ventilation systems. Results from a field test of the prototype controller corroborate the predicted performance.

  19. Sulfide scaling in low enthalpy geothermal environments; A survey

    SciTech Connect (OSTI)

    Criaud, A.; Fouillac, C. (Bureau de Recherches Geologiques et Minieres (BRGM), 45 - Orleans (France))

    1989-01-01T23:59:59.000Z

    A review of the sulfide scaling phenomena in low-temperature environments is presented. While high-temperature fluids tend to deposit metal sulfides because of their high concentrations of dissolved metals and variations of temperature, pressure and fluid chemistry, low temperature media are characterized by very low metal content but much higher dissolved sulfide. In the case of the goethermal wells of the Paris Basin, detailed studies demonstrate that the relatively large concentrations of chloride and dissolved sulfide are responsible for corrosion and consequent formation of iron sulfide scale composed of mackinawite, pyrite and pyrrhotite. The effects of the exploitation schemes are far less important than the corrosion of the casings. The low-enthalpy fluids that do not originate from sedimentary aquifers (such as in Iceland and Bulgaria), have a limited corrosion potential, and the thin sulfide film that appears may prevent the progress of corrosion.

  20. Particle deposition in ventilation ducts

    SciTech Connect (OSTI)

    Sippola, Mark R.

    2002-09-01T23:59:59.000Z

    Exposure to airborne particles is detrimental to human health and indoor exposures dominate total exposures for most people. The accidental or intentional release of aerosolized chemical and biological agents within or near a building can lead to exposures of building occupants to hazardous agents and costly building remediation. Particle deposition in heating, ventilation and air-conditioning (HVAC) systems may significantly influence exposures to particles indoors, diminish HVAC performance and lead to secondary pollutant release within buildings. This dissertation advances the understanding of particle behavior in HVAC systems and the fates of indoor particles by means of experiments and modeling. Laboratory experiments were conducted to quantify particle deposition rates in horizontal ventilation ducts using real HVAC materials. Particle deposition experiments were conducted in steel and internally insulated ducts at air speeds typically found in ventilation ducts, 2-9 m/s. Behaviors of monodisperse particles with diameters in the size range 1-16 {micro}m were investigated. Deposition rates were measured in straight ducts with a fully developed turbulent flow profile, straight ducts with a developing turbulent flow profile, in duct bends and at S-connector pieces located at duct junctions. In straight ducts with fully developed turbulence, experiments showed deposition rates to be highest at duct floors, intermediate at duct walls, and lowest at duct ceilings. Deposition rates to a given surface increased with an increase in particle size or air speed. Deposition was much higher in internally insulated ducts than in uninsulated steel ducts. In most cases, deposition in straight ducts with developing turbulence, in duct bends and at S-connectors at duct junctions was higher than in straight ducts with fully developed turbulence. Measured deposition rates were generally higher than predicted by published models. A model incorporating empirical equations based on the experimental measurements was applied to evaluate particle losses in supply and return duct runs. Model results suggest that duct losses are negligible for particle sizes less than 1 {micro}m and complete for particle sizes greater than 50 {micro}m. Deposition to insulated ducts, horizontal duct floors and bends are predicted to control losses in duct systems. When combined with models for HVAC filtration and deposition to indoor surfaces to predict the ultimate fates of particles within buildings, these results suggest that ventilation ducts play only a small role in determining indoor particle concentrations, especially when HVAC filtration is present. However, the measured and modeled particle deposition rates are expected to be important for ventilation system contamination.

  1. Solar Ventilation Preheating Resources and Technologies

    Broader source: Energy.gov [DOE]

    This page provides a brief overview of solar ventilation preheating (SVP) technologies supplemented by specific information to apply SVP within the Federal sector.

  2. Equivalence in Ventilation and Indoor Air Quality

    E-Print Network [OSTI]

    Sherman, Max

    2012-01-01T23:59:59.000Z

    Equivalence in Ventilation and Indoor Air Quality M. H.have a method for determining equivalence in terms of eitherwe need to establish an equivalence principle that allows

  3. Development of a Residential Integrated Ventilation Controller

    E-Print Network [OSTI]

    Walker, Iain

    2013-01-01T23:59:59.000Z

    systems such as those sold by Honeywell, and Aprilaire. Forin the world. Honeywell (http://yourhome.honeywell.com/US/Products/Ventilation/ ) Honeywell makes a line of economy

  4. Natural Ventilation | Department of Energy

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated CodesTransparency VisitSilver Toyota1Resourceloading newNatural Ventilation

  5. Ventilation Behavior and Household Characteristics in New California Houses

    E-Print Network [OSTI]

    Price, Phillip N.; Sherman, Max H.

    2006-01-01T23:59:59.000Z

    and Mechanical Ventilation: Use of Local Exhaust Fans:pollutants. Large ventilation fans can cause local thermallocal contaminants such as those from kitchen and bathroom activities, then minimum building ventilation

  6. Commissioning Residential Ventilation Systems: A Combined Assessment of

    E-Print Network [OSTI]

    Commissioning Residential Ventilation Systems: A Combined Assessment of Energy and Air Quality ventilation systems are being installed in new California homes. Few measurements are available of commissioning residential whole- house ventilation systems that are intended to comply

  7. External Authorities and Peers Laboratory Ventilation Management Program

    E-Print Network [OSTI]

    Pawlowski, Wojtek

    External Authorities and Peers Laboratory Ventilation Management Program Guidance Document External Authorities and Peers This group encompasses external groups who do not manage laboratory ventilation systems to laboratory ventilation management. Roles Responsibilities Tracking Indicator Laboratory science peers

  8. HVAC EFFICIENCY BUSINESS CASE DEMAND CONTROL KITCHEN VENTILATION

    E-Print Network [OSTI]

    California at Davis, University of

    HVAC EFFICIENCY BUSINESS CASE DEMAND CONTROL KITCHEN VENTILATION Selecting, financing ventilation (DCKV) for kitchen exhaust hoods. Implementation can be relatively simple in either new of demand control kitchen ventilation (DCKV) in many small, medium, and large kitchen exhaust hood

  9. RESEARCH ARTICLE Open Access Noninvasive ventilation reduces energy

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    RESEARCH ARTICLE Open Access Noninvasive ventilation reduces energy expenditure in amyotrophic with a shift of the burden of ventilation to extradiaphragmatic inspiratory muscles, including neck muscles prognostic value. We hypothesized that noninvasive ventilation (NIV) would relieve inspiratory neck muscles

  10. Infiltration in ASHRAE's Residential Ventilation Standards

    SciTech Connect (OSTI)

    Sherman, Max

    2008-10-01T23:59:59.000Z

    The purpose of ventilation is to dilute or remove indoor contaminants that an occupant could be exposed to. It can be provided by mechanical or natural means. ASHRAE Standards including standards 62, 119, and 136 have all considered the contribution of infiltration in various ways, using methods and data from 20 years ago. The vast majority of homes in the United States and indeed the world are ventilated through natural means such as infiltration caused by air leakage. Newer homes in the western world are tight and require mechanical ventilation. As we seek to provide acceptable indoor air quality at minimum energy cost, it is important to neither over-ventilate norunder-ventilate. Thus, it becomes critically important to correctly evaluate the contribution infiltration makes to both energy consumption and equivalent ventilation. ASHRAE Standard 62.2 specifies how much mechanical ventilation is considered necessary to provide acceptable indoor air quality, but that standard is weak on how infiltration can contribute towards meeting the total requirement. In the past ASHRAE Standard 136 was used to do this, but new theoretical approaches and expanded weather data have made that standard out of date. This article will describe how to properly treat infiltration as an equivalent ventilation approach and then use new data and these new approaches to demonstrate how these calculations might be done both in general and to update Standard 136.

  11. Hybrid Ventilation Optimization and Control Research and Development...

    Energy Savers [EERE]

    Hybrid Ventilation Optimization and Control Research and Development Hybrid Ventilation Optimization and Control Research and Development Lead Performer: Massachusetts Institute of...

  12. Ventilation System to Improve Savannah River Site's Liquid Waste...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Ventilation System to Improve Savannah River Site's Liquid Waste Operations Ventilation System to Improve Savannah River Site's Liquid Waste Operations August 28, 2014 - 12:00pm...

  13. Case Study - The Challenge: Improving Ventilation System Energy...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Ventilation System Energy Efficiency in a Textile Plant Case Study - The Challenge: Improving Ventilation System Energy Efficiency in a Textile Plant This case study examines how...

  14. Workers Remove Glove Boxes from Ventilation at Hanford's Plutonium...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Remove Glove Boxes from Ventilation at Hanford's Plutonium Finishing Plant Workers Remove Glove Boxes from Ventilation at Hanford's Plutonium Finishing Plant January 28, 2015 -...

  15. Critical Question #2: What are the Best Practices for Ventilation...

    Energy Savers [EERE]

    2: What are the Best Practices for Ventilation Specific to Multifamily Buildings? Critical Question 2: What are the Best Practices for Ventilation Specific to Multifamily...

  16. air ventilation rate: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Requirements University of California eScholarship Repository Summary: typical existing house. Designed passive ventilation systemsPassive Ventilation by Constant Area Vents to...

  17. Adventitious ventilation: a new definition for an old mode?

    E-Print Network [OSTI]

    Schiavon, Stefano

    2014-01-01T23:59:59.000Z

    Refrigeration and Air-Conditioning Engineers (ASHRAEof ventilation and air- conditioning system types in officeto natural ventilation, air conditioning, with or without

  18. Summer Infiltration/Ventilation Test Results from the FRTF Laboratory...

    Energy Savers [EERE]

    Summer InfiltrationVentilation Test Results from the FRTF Laboratory Summer InfiltrationVentilation Test Results from the FRTF Laboratory This presentation was delivered at the...

  19. BUILDING VENTILATION AND INDOOR AIR QUALITY PROGRAM. CHAPTER FROM ENERGY AND ENVIRONMENT DIVISION ANNUAL REPORT 1978

    E-Print Network [OSTI]

    Cairns, Elton J.

    2011-01-01T23:59:59.000Z

    and in new "energy-efficient design" hospitals. Developmentenergy-efficient ventilation standards and ventilation designs

  20. Measuring Residential Ventilation System Airflows: Part 1 Laboratory

    E-Print Network [OSTI]

    1 Measuring Residential Ventilation System Airflows: Part 1 ­ Laboratory Evaluation of Airflow: residential, mechanical ventilation, measurement, ASHRAE 62.2, flow hood ABSTRACT Building codes increasingly require tighter homes and mechanical ventilation per ASHRAE Standard 62.2. These ventilation flows must

  1. THE MECHANICS OF LUNG TISSUE UNDER HIGH-FREQUENCY VENTILATION

    E-Print Network [OSTI]

    Lewis, Mark

    THE MECHANICS OF LUNG TISSUE UNDER HIGH-FREQUENCY VENTILATION MARKUS R. OWEN AND MARK A. LEWIS SIAM­1761 Abstract. High-frequency ventilation is a radical departure from conventional lung ventilation question concerns ventilator-induced damage to the lung tissue, and a clear protocol for the most effective

  2. THE MECHANICS OF LUNG TISSUE UNDER HIGH-FREQUENCY VENTILATION

    E-Print Network [OSTI]

    THE MECHANICS OF LUNG TISSUE UNDER HIGH-FREQUENCY VENTILATION MARKUS R. OWEN AND MARK A. LEWIS Abstract. High frequency ventilation is a radical departure from conventional lung ventilation question concerns ventilator induced damage to the lung tissue, and a clear protocol for the most effective

  3. Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements

    Broader source: Energy.gov [DOE]

    The webinar will focus on key challenges in multifamily ventilation and strategies to address these challenges.

  4. Midlevel ventilation's constraint on tropical cyclone intensity

    E-Print Network [OSTI]

    Tang, Brian Hong-An

    2010-01-01T23:59:59.000Z

    Midlevel ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hypothesized mechanism by which environmental vertical wind shear can constrain a TC's intensity. An idealized ...

  5. Tunnel ventilation effectiveness in fire scenarios 

    E-Print Network [OSTI]

    Colella, Francesco; Rein, Guillermo; Carvel, Ricky O; Torero, Jose L

    2010-01-01T23:59:59.000Z

    Throughout most of a tunnel network the ventilation behaviour may be approximated with a simple 1D flow model. However, there are some important - but relatively small - regions of the tunnel that require CFD analysis. The multi-scale model...

  6. Midlevel Ventilation's Constraint on Tropical Cyclone Intensity

    E-Print Network [OSTI]

    Tang, Brian Hong-An

    Midlevel ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hypothesized mechanism by which environmental vertical wind shear can constrain a tropical cyclone’s intensity. An ...

  7. A Ventilation Index for Tropical Cyclones

    E-Print Network [OSTI]

    Tang, Brian

    An important environmental control of both tropical cyclone intensity and genesis is vertical wind shear. One hypothesized pathway by which vertical shear affects tropical cyclones is midlevel ventilation—or the flux of ...

  8. Performance Assessment of Photovoltaic Attic Ventilator Fans 

    E-Print Network [OSTI]

    Parker, D. S.; Sherwin, J. R.

    2000-01-01T23:59:59.000Z

    has long been identified as a method to abate such heat gains. We present test results from using the photovoltaic (PV) attic ventilator fans in a test home to assess impact on attic and cooling energy performance....

  9. Development of a Residential Integrated Ventilation Controller

    E-Print Network [OSTI]

    Walker, Iain

    2013-01-01T23:59:59.000Z

    and Ventilation Center. Emmerich, S.J, Dols, W.S. , “LoopDA:8 Int. IPBSA Conf. (2003) Emmerich S.J. Nabinger, S. J. “53484. Wallace, L. A. , Emmerich, S. J. , and Howard-Reed,

  10. Floor-supply displacement ventilation system

    E-Print Network [OSTI]

    Kobayashi, Nobukazu, 1967-

    2001-01-01T23:59:59.000Z

    Research on indoor environments has received more attention recently because reports of symptoms and other health complaints related to indoor environments have been increasing. Heating, ventilating, and air-conditioning ...

  11. May 1999 LBNL -42975 ASHRAE'S RESIDENTIAL VENTILATION

    E-Print Network [OSTI]

    May 1999 LBNL - 42975 ASHRAE'S RESIDENTIAL VENTILATION STANDARD: EXEGESIS OF PROPOSED STANDARD 62 standard. 1 Max Sherman is a Senior Scientist at LBNL and the group leader of its Energy Performance

  12. Scale model studies of displacement ventilation

    E-Print Network [OSTI]

    Okutan, Galip Mehmet

    1995-01-01T23:59:59.000Z

    Displacement ventilation is an air conditioning method that provides conditioned air to indoor environments with the goal to improve air quality while reducing energy consumption. This study investigates the performance ...

  13. Performance Assessment of Photovoltaic Attic Ventilator Fans

    E-Print Network [OSTI]

    Parker, D. S.; Sherwin, J. R.

    2000-01-01T23:59:59.000Z

    has long been identified as a method to abate such heat gains. We present test results from using the photovoltaic (PV) attic ventilator fans in a test home to assess impact on attic and cooling energy performance....

  14. Demand Controlled Ventilation for Improved Humidity Control

    E-Print Network [OSTI]

    Rogers, J. K.

    1996-01-01T23:59:59.000Z

    Demand Controlled Ventilation for Improved Humidity Control James K. Rogers, P.E. One Blacksmith Road Chelmsford, Massachusetts ABSTRACT Recently introduced technology makes it possible to continuously monitor for humidity in numerous... is brought in for ventilation. The high "latent load" inherent in this hot, humid outside air is often the reason for installing excess chiller capacity and the cause of peak power demands. Recent concerns over poor indoor air quality (IAQ) due...

  15. Industrial Ventilation Statistics Confirm Energy Savings Opportunity

    E-Print Network [OSTI]

    Litomisky, A.

    2006-01-01T23:59:59.000Z

    is based on installed on-demand ventilation systems, where sensors and PLC are installed with each system, so data is easily collected. Another critical factor for effective dust collecting is proper air velocities in duct system. Having measured air... velocities at drops and at the main ducts of existing classical industrial ventilation designs in 90 factories, 130 systems, and 1000 drops, we have found that only a minimum of air velocities are in the recommended range. There is a striking dichotomy...

  16. Sensor-based demand controlled ventilation

    SciTech Connect (OSTI)

    De Almeida, A.T. [Universidade de Coimbra (Portugal). Dep. Eng. Electrotecnica; Fisk, W.J. [Lawrence Berkeley National Lab., CA (United States)

    1997-07-01T23:59:59.000Z

    In most buildings, occupancy and indoor pollutant emission rates vary with time. With sensor-based demand-controlled ventilation (SBDCV), the rate of ventilation (i.e., rate of outside air supply) also varies with time to compensate for the changes in pollutant generation. In other words, SBDCV involves the application of sensing, feedback and control to modulate ventilation. Compared to ventilation without feedback, SBDCV offers two potential advantages: (1) better control of indoor pollutant concentrations; and (2) lower energy use and peak energy demand. SBDCV has the potential to improve indoor air quality by increasing the rate of ventilation when indoor pollutant generation rates are high and occupants are present. SBDCV can also save energy by decreasing the rate of ventilation when indoor pollutant generation rates are low or occupants are absent. After providing background information on indoor air quality and ventilation, this report provides a relatively comprehensive discussion of SBDCV. Topics covered in the report include basic principles of SBDCV, sensor technologies, technologies for controlling air flow rates, case studies of SBDCV, application of SBDCV to laboratory buildings, and research needs. SBDCV appears to be an increasingly attractive technology option. Based on the review of literature and theoretical considerations, the application of SBDCV has the potential to be cost-effective in applications with the following characteristics: (a) a single or small number of dominant pollutants, so that ventilation sufficient to control the concentration of the dominant pollutants provides effective control of all other pollutants; (b) large buildings or rooms with unpredictable temporally variable occupancy or pollutant emission; and (c) climates with high heating or cooling loads or locations with expensive energy.

  17. Disposable colorimetric carbon dioxide detector use as an indicator of a patent airway during noninvasive mask ventilation

    E-Print Network [OSTI]

    Leone, T A; Lange, A; Rich, W; Finer, N N

    2006-01-01T23:59:59.000Z

    During Noninvasive Mask Ventilation Tina A. Leone, Allisonduring bag and mask ventilation and en- courage others toposi- tive pressure ventilation in preterm babies ventilated

  18. Recovery Act

    Broader source: Energy.gov [DOE]

    Recovery Act and Energy Department programs were designed to stimulate the economy while creating new power sources, conserving resources and aligning the nation to once again lead the global energy economy.

  19. Room air stratification in combined chilled ceiling and displacement ventilation systems.

    E-Print Network [OSTI]

    Schiavon, Stefano; Bauman, Fred; Tully, Brad; Rimmer, Julian

    2012-01-01T23:59:59.000Z

    nodal model for displacement ventilation and chilled ceiling2002. Displacement ventilation in non- industrial premises.ceiling/displacement ventilation hybrid air conditioning

  20. Assessment of Indoor Air Quality Benefits and Energy Costs of Mechanical Ventilation

    E-Print Network [OSTI]

    Logue, J.M.

    2012-01-01T23:59:59.000Z

    Energy Costs of Mechanical Ventilation KEMA-XENERGY.2004.Offermann, F. J.2009. Ventilation and indoor air quality intowards meeting residential ventilation needs. Berkeley, CA,

  1. Control of the microclimate around the head with opposing jet local ventilation

    E-Print Network [OSTI]

    Liu, Chonghui; Higuchi, Hiroshi; Arens, Edward; Zhang, Hui Ph.D

    2009-01-01T23:59:59.000Z

    of opposing jet local ventilation. AIAA 2009 Region I-NEImpact of a task-ambient ventilation system on perceived airefficiency for personalized ventilation application. Healthy

  2. Infiltration Effects on Residential Pollutant Concentrations for Continuous and Intermittent Mechanical Ventilation Approaches

    E-Print Network [OSTI]

    Sherman, Max

    2010-01-01T23:59:59.000Z

    P. (2002). Technical Note AIVC 57: Residential Ventilation.Air Infiltration and Ventilation Center (AIVC) Edwards, R.Related to Residential Ventilation Requirements. Berkeley,

  3. BUILDING VENTILATION AND INDOOR AIR QUALITY PROGRAM. CHAPTER FROM ENERGY AND ENVIRONMENT DIVISION ANNUAL REPORT 1978

    E-Print Network [OSTI]

    Cairns, Elton J.

    2011-01-01T23:59:59.000Z

    The first section on the Ventilation Program, funded by thea large study on hospital ventilation require- ments.iii Ventilation Program C. D. Hollowell, A. Anaclerio, D. W.

  4. Created: July, 2014 Laboratory Safety Design Guide Section 3 Laboratory Ventilation

    E-Print Network [OSTI]

    Queitsch, Christine

    Created: July, 2014 Laboratory Safety Design Guide Section 3 ­ Laboratory Ventilation 3-1 Section 3 LABORATORY VENTILATION Contents A. Scope .................................................................................................................3-2 B. General Laboratory Ventilation

  5. Risk Factors in Heating, Ventilating, and Air-Conditioning Systems for Occupant Symptoms in

    E-Print Network [OSTI]

    Mendell, M.J.; Lei-Gomez, Q.; Mirer, A.; Seppanen, O.; Brunner, G.

    2007-01-01T23:59:59.000Z

    LBNL-61870 Risk Factors in Heating, Ventilating, and Air-for Occupant Symptoms in Heating, Ventilating, and Air-uncertain. Characteristics of heating, ventilating, and air-

  6. BUILDING VENTILATION AND INDOOR AIR QUALITY PROGRAM. CHAPTER FROM ENERGY AND ENVIRONMENT DIVISION ANNUAL REPORT 1978

    E-Print Network [OSTI]

    Cairns, Elton J.

    2011-01-01T23:59:59.000Z

    occupants. The heating, ventilation and air conditioning (third of the heating, ventilation, and air conditioning (see Fig. 1) Heating ventilation and air conditioning (HVAC)

  7. Modelica Library for Building Heating, Ventilation and Air-Conditioning Systems

    E-Print Network [OSTI]

    Wetter, Michael

    2010-01-01T23:59:59.000Z

    for Building Heating, Ventilation and Air-Conditioningfor Building Heating, Ventilation and Air-Conditioningfor building heating, ventilation and air con- ditioning

  8. INDOOR AIR QUALITY AND ENERGY EFFICIENT VENTILATION RATES AT A NEW YORK CITY ELEMENTARY SCHOOL

    E-Print Network [OSTI]

    Young, Rodger A.

    2013-01-01T23:59:59.000Z

    To determine the yearly ventilation-heating load for thecalculations of ventilation heating load 25 in variousexi~ting school heating and ventilation conditions. It must

  9. Commissioning Residential Ventilation Systems: A Combined Assessment of Energy and Air Quality Potential Values

    E-Print Network [OSTI]

    Turner, William J.N.

    2014-01-01T23:59:59.000Z

    through dynamic control of ventilation systems. Energy andcontinuous mechanical ventilation systems a mean annualcompliant ASHRAE 62.2 ventilation system. Table 12: Average

  10. Risk Factors in Heating, Ventilating, and Air-Conditioning Systems for Occupant Symptoms in

    E-Print Network [OSTI]

    Mendell, M.J.; Lei-Gomez, Q.; Mirer, A.; Seppanen, O.; Brunner, G.

    2007-01-01T23:59:59.000Z

    for building ventilation systems." Retrieved December 15,of moisture and ventilation system contamination in U.S.installed in office ventilation systems on workers' health

  11. Relationship of SBS-symptoms and ventilation system type in office buildings

    E-Print Network [OSTI]

    Seppanen, O.; Fisk, W.J.

    2002-01-01T23:59:59.000Z

    SBS-SYMPTOMS AND VENTILATION SYSTEM TYPE IN OFFICE BUILDINGSSBS-SYMPTOMS AND VENTILATION SYSTEM TYPE IN OFFICE BUILDINGSabout the associations of ventilation system types in office

  12. Air change effectiveness in laboratory tests of combined chilled ceiling and displacement ventilation.

    E-Print Network [OSTI]

    Schiavon, Stefano; Bauman, Fred; Tully, Brad; Rimmer, Julian

    2011-01-01T23:59:59.000Z

    and displacement ventilation systems. Energy and Buildings,and displacement ventilation systems. Submitted to HVAC&R (and displacement ventilation system. According to Novoselac

  13. Procedures and Standards for Residential Ventilation System Commissioning: An Annotated Bibliography

    E-Print Network [OSTI]

    Stratton, J. Chris

    2014-01-01T23:59:59.000Z

    Residential Mechanical Ventilation Systems”. CAN/CSA-F326-of Domestic Ventilation Systems”. International EnergyPassive Stack Ventilation Systems: Design and Installation”.

  14. Energy and air quality implications of passive stack ventilation in residential buildings

    E-Print Network [OSTI]

    Mortensen, Dorthe Kragsig

    2011-01-01T23:59:59.000Z

    tighter, designed ventilation systems are more frequentlyof passive stack ventilation systems. They have been usedto having a good ventilation system and therefore also to

  15. OCCUPANT-GENERATED CO2 AS AN INDICATOR OF VENTILATION RATE

    E-Print Network [OSTI]

    Turiel, Isaac

    2012-01-01T23:59:59.000Z

    ln mechanical ventilation systems are often inconvenientlywas conducted, the ventilation system mixes outside air withon a day when the ventilation system was in the all-outside-

  16. Infiltration Effects on Residential Pollutant Concentrations for Continuous and Intermittent Mechanical Ventilation Approaches

    E-Print Network [OSTI]

    Sherman, Max

    2010-01-01T23:59:59.000Z

    of whole-house ventilation systems in meeting exposurefor residential ventilation system design is the Americanand operating ventilation systems with variable amounts of

  17. Room air stratification in combined chilled ceiling and displacement ventilation systems.

    E-Print Network [OSTI]

    Schiavon, Stefano; Bauman, Fred; Tully, Brad; Rimmer, Julian

    2012-01-01T23:59:59.000Z

    and displacement ventilation systems. HVAC&R Research, 12 (and displacement ventilation system. ASHRAE RP-1438 Finalof Displacement Ventilation System—Experimental and

  18. Performance testing of a floor-based, occupant-controlled office ventilation system

    E-Print Network [OSTI]

    Bauman, Fred; Johnston, L.; Zhang, H.; Arens, Edward A

    1991-01-01T23:59:59.000Z

    a room ment ventilation systems." ASHRAE Transactions, Vol.95, Part 2. ence, Ventilation System Performance, 18-21Fountain. 1990. "A ventilation systems in office rooms."

  19. Association of ventilation system type with SBS symptoms in office workers

    E-Print Network [OSTI]

    Seppanen, Olli; Fisk, William J.

    2001-01-01T23:59:59.000Z

    Evaluation of Swedish ventilation systems” Building andP. (1995) “Type of ventilation system in office buildingsEvaluation of ventilation system materials as sources of

  20. Energy and Cost Associated with Ventilating Office Buildings in a Tropical Climate

    E-Print Network [OSTI]

    Rim, Donghyun; Schiavon, Stefano; Nazaroff, William W

    2015-01-01T23:59:59.000Z

    heating and cooling energy demand in Switzer- land. Energyorder: 1) ventilation energy demand; 2) ventilation energythe study. Ventilation energy demand Fig 2A summarizes the

  1. BUILDING VENTILATION AND INDOOR AIR QUALITY PROGRAM. CHAPTER FROM ENERGY AND ENVIRONMENT DIVISION ANNUAL REPORT 1978

    E-Print Network [OSTI]

    Cairns, Elton J.

    2011-01-01T23:59:59.000Z

    of automatic variable ventilation control systems based onof automatic variable ventilation control systems, The Johnbe developed. Automatic Variable Ventilation Control Systems

  2. Carbon-dioxide-controlled ventilation study

    SciTech Connect (OSTI)

    McMordie, K.L.; Carroll, D.M.

    1994-05-01T23:59:59.000Z

    The In-House Energy Management (IHEM) Program has been established by the U.S. Department of Energy to provide funds to federal laboratories to conduct research on energy-efficient technology. The Energy Sciences Department of Pacific Northwest Laboratory (PNL) was tasked by IHEM to research the energy savings potential associated with reducing outdoor-air ventilation of buildings. By monitoring carbon dioxide (CO{sub 2}) levels in a building, outdoor air provided by the heating, ventilating, and air-conditioning (HVAC) system can be reduced to the percentage required to maintain satisfactory CO{sub 2} levels rather than ventilating with a higher outdoor-air percentage based on an arbitrary minimum outdoor-air setting. During summer months, warm outdoor air brought into a building for ventilation must be cooled to meet the appropriate cooling supply-air temperature, and during winter months, cold outdoor air must be heated. By minimizing the amount of hot or cold outdoor air brought into the HVAC system, the supply air requires less cooling or heating, saving energy and money. Additionally, the CO{sub 2} levels in a building can be monitored to ensure that adequate outdoor air is supplied to a building to maintain air quality levels. The two main considerations prior to implementing CO{sub 2}-based ventilation control are its impact on energy consumption and the adequacy of indoor air quality (IAQ) and occupant comfort. To address these considerations, six portable CO{sub 2} monitors were placed in several Hanford Site buildings to estimate the adequacy of office/workspace ventilation. The monitors assessed the potential for reducing the flow of outdoor-air to the buildings. A candidate building was also identified to monitor various ventilation control strategies for use in developing a plan for implementing and assessing energy savings.

  3. Definition of Total Energy budget equation in terms of moist-air Enthalpy surface flux

    E-Print Network [OSTI]

    Marquet, Pascal

    2015-01-01T23:59:59.000Z

    Uncertainty exists concerning the proper formulation of surface heat fluxes, namely the sum of "sensible" and "latent" heat fluxes, and in fact concerning these two fluxes if they are considered as separate fluxes. In fact, eddy flux of moist-air energy must be defined as the eddy transfer of moist-air specific enthalpy ($\\overline{w' h'}$), where the specific enthalpy ($h$) is equal to the internal energy of moist air plus the pressure divided by the density (namely $h = e_{\\rm int} + p/\\rho$). The fundamental issue is to compute this local (specific) moist-air enthalpy ($h$), and in particular to determine absolute reference value of enthalpies for dry air and water vapour $(h_d)_{\\rm ref}$ and $(h_v)_{\\rm ref}$. New results shown in Marquet (QJRMS 2015, arXiv:1401.3125) are based on the Third-law of Thermodynamics and can allow these computations. In this note, this approach is taken to show that Third-law based values of moist-air enthalpy fluxes is the sum of two terms. These two terms are similar to wha...

  4. Recovery Act: State Assistance for Recovery Act Related Electricity...

    Energy Savers [EERE]

    Information Center Recovery Act Recovery Act: State Assistance for Recovery Act Related Electricity Policies Recovery Act: State Assistance for Recovery Act Related...

  5. A moist "available enthalpy" norm: definition and comparison with existing "energy" norms

    E-Print Network [OSTI]

    Marquet, Pascal

    2015-01-01T23:59:59.000Z

    Moist-air norms and inner-products are currently used in atmospheric science for computing dry or moist singular vectors and for determining forecast errors or sensitivity to observations based on tangent linear and adjoint models. A new moist-air norm is defined starting from old results published in Marquet (QJRMS 1993) and based on the "Available Enthalpy" approach, namely one of the Exergy function defined in general thermodynamics. Some interesting and promising impacts of this new "Available Enthalpy" norm are described in this brief version of a paper to be submitted to the QJRMS.

  6. Computer Simulation of Cooling Effect of Wind Tower on Passively Ventilated Building 

    E-Print Network [OSTI]

    Seryak, J.; Kissock, J. K.

    2002-01-01T23:59:59.000Z

    Traditional buildings are cooled and ventilated by mechanically induced drafts. Natural ventilation aspires to cool and ventilate a building by natural means, such as cross ventilation or wind towers, without mechanical equipment. A simple computer...

  7. MODELING VENTILATION SYSTEM RESPONSE TO FIRE

    SciTech Connect (OSTI)

    Coutts, D

    2007-04-17T23:59:59.000Z

    Fires in facilities containing nuclear material have the potential to transport radioactive contamination throughout buildings and may lead to widespread downwind dispersal threatening both worker and public safety. Development and implementation of control strategies capable of providing adequate protection from fire requires realistic characterization of ventilation system response which, in turn, depends on an understanding of fire development timing and suppression system response. This paper discusses work in which published HEPA filter data was combined with CFAST fire modeling predictions to evaluate protective control strategies for a hypothetical DOE non-reactor nuclear facility. The purpose of this effort was to evaluate when safety significant active ventilation coupled with safety class passive ventilation might be a viable control strategy.

  8. Estimated costs of ventilation systems complying with the HUD ventilation standard for manufactured homes

    SciTech Connect (OSTI)

    Miller, J.D.; Conner, C.C.

    1993-11-01T23:59:59.000Z

    At the request of the US Department of Housing and Urban Development (HUD), the Pacific Northwest Laboratory estimated the material, labor, and operating costs for ventilation equipment needed for compliance with HUD`s proposed revision to the ventilation standard for manufactured housing. This was intended to bound the financial impacts of the ventilation standard revision. Researchers evaluated five possible prototype ventilation systems that met the proposed ventilation requirements. Of those five, two systems were determined to be the most likely used by housing manufacturers: System 1 combines a fresh air duct with the existing central forced-air system to supply and circulate fresh air to conditioned spaces. System 2 uses a separate exhaust fan to remove air from the manufactured home. The estimated material and labor costs for these two systems range from $200 to $300 per home. Annual operating costs for the two ventilation systems were estimated for 20 US cities. The estimated operating costs for System 1 ranged from $55/year in Las Vegas, Nevada, to $83/year in Bismarck, North Dakota. Operating costs for System 2 ranged from a low of $35/year in Las Vegas to $63/year in Bismarck. Thus, HUD`s proposed increase in ventilation requirements will add less than $100/year to the energy cost of a manufactured home.

  9. Design of a Natural Ventilation System in the Dunhuang Museum 

    E-Print Network [OSTI]

    Zhang, Y.; Guan, W.

    2006-01-01T23:59:59.000Z

    that also meets architectural standards. Natural ventilation design methods are presented in this paper. A natural ventilation system is designed in the DunHuang museum. Thermal dynamic simulation and CFD simulation were analyzed in the exhibition hall...

  10. Modeling buoyancy-driven airflow in ventilation shafts

    E-Print Network [OSTI]

    Ray, Stephen D. (Stephen Douglas)

    2012-01-01T23:59:59.000Z

    Naturally ventilated buildings can significantly reduce the required energy for cooling and ventilating buildings by drawing in outdoor air using non-mechanical forces. Buoyancy-driven systems are common in naturally ...

  11. Design of a Natural Ventilation System in the Dunhuang Museum

    E-Print Network [OSTI]

    Zhang, Y.; Guan, W.

    2006-01-01T23:59:59.000Z

    Fresh air and good air quality can be obtained by a natural ventilation system, to fulfill the requirement of near natural conditions for the psychological health of mankind. A natural ventilation system is an ecological, energy saving system...

  12. Study on Influencing Factors of Night Ventilation in Office Rooms

    E-Print Network [OSTI]

    Wang, Z.; Sun, X.

    2006-01-01T23:59:59.000Z

    A mathematical and physical model on night ventilation is set up. The fields of indoor air temperature, air velocity and thermal comfort are simulated using Airpak software. Some main influencing factors of night ventilation in office rooms...

  13. Analyzing Ventilation Effects of Different Apartment Styles by CFD

    E-Print Network [OSTI]

    Li, X.; Wang, L.; Ye, Z.

    2006-01-01T23:59:59.000Z

    in different directions have distinct ventilation environments. By compare the velocity fields of each apartment in four directions, results show that the apartment in the east has favorable ventilation effects. There are some disadvantages of other apartments...

  14. Application Study on Combined Ventilation System of Improving IAQ

    E-Print Network [OSTI]

    Hu, S.; Li, G.; Zhang, C.; Ye, B.

    2006-01-01T23:59:59.000Z

    A type of combined ventilating system is put forward in this paper. Through CFD simulation and testing of contaminant concentrations in a prototype residential room, the results demonstrate that the new ventilating system is advantageous...

  15. GASTRIC REFLUX IN MECHANICALLY VENTILATED GASTRIC FED ICU PATIENTS

    E-Print Network [OSTI]

    Schallom, Marilyn

    2013-08-31T23:59:59.000Z

    in ventilated patients is a major cause of ventilator associated pneumonia (VAP). Guidelines that recommend head of bed (HOB) elevation greater than 30? to prevent reflux, aspiration and VAP conflict with guidelines to prevent pressure ulcers which recommend HOB...

  16. A scale model study of displacement ventilation with chilled ceilings

    E-Print Network [OSTI]

    Holden, Katherine J. A. (Katherine Joan Adrienne)

    1995-01-01T23:59:59.000Z

    Displacement ventilation is a form of air-conditioning which provides good air quality and some energy savings. The air quality is better than for a conventional mixed ventilation system. The maximum amount of cooling that ...

  17. Natural ventilation : design for suburban houses in Thailand

    E-Print Network [OSTI]

    Tantasavasdi, Chalermwat, 1971-

    1998-01-01T23:59:59.000Z

    Natural Ventilation is the most effective passive cooling design strategy for architecture in hot and humid climates. In Thailand, natural ventilation has been the most essential element in the vernacular architecture such ...

  18. Study of natural ventilation in buildings with large eddy simulation

    E-Print Network [OSTI]

    Jiang, Yi, 1972-

    2002-01-01T23:59:59.000Z

    With the discovery of many economic, environmental, and health problems in sealed and mechanically ventilated buildings, the concept of natural ventilation has been revived. "Buildings that breathe" have become more and ...

  19. Control of the microclimate around the head with opposing jet local ventilation

    E-Print Network [OSTI]

    Liu, Chonghui; Higuchi, Hiroshi; Arens, Edward; Zhang, Hui Ph.D

    2009-01-01T23:59:59.000Z

    of opposing jet local ventilation. AIAA 2009 Region I-NEHead with Opposing Jet Local Ventilation Chonghui Liu 1,* ,

  20. HOSPITAL VENTILATION STANDARDS AND ENERGY CONSERVATION: CHEMICAL CONTAMINATION OF HOSPITAL AIR. FINAL REPORT.

    E-Print Network [OSTI]

    Rainer, David

    2012-01-01T23:59:59.000Z

    open bench top local exhaust ventilation, The OSHA standardsuch as local ex- haust ventilation when properly applied,

  1. HOSPITAL VENTILATION STANDARDS AND ENERGY CONSERVATION: A SUMMARY OF THE LITERATURE WITH CONCLUSIONS AND RECOMMENDATIONS, FY 78 FINAL REPORT

    E-Print Network [OSTI]

    DeRoos, R.L.

    2011-01-01T23:59:59.000Z

    on the premise that current hospital ventilation standardsand ,ventilation rates based on the premise of reducing

  2. STATE OF CALIFORNIA DEMAND CONTROL VENTILATION SYSTEMS ACCEPTANCE

    E-Print Network [OSTI]

    STATE OF CALIFORNIA DEMAND CONTROL VENTILATION SYSTEMS ACCEPTANCE CEC-MECH-6A (Revised 08/09) CALIFORNIA ENERGY COMMISSION CERTIFICATE OF ACCEPTANCE MECH-6A NA7.5.5 Demand Control Ventilation Systems DEMAND CONTROL VENTILATION SYSTEMS ACCEPTANCE CEC-MECH-6A (Revised 08/09) CALIFORNIA ENERGY COMMISSION

  3. Contribution of Gular Pumping to Lung Ventilation in Monitor

    E-Print Network [OSTI]

    Brainerd, Elizabeth

    Contribution of Gular Pumping to Lung Ventilation in Monitor Lizards Tomasz Owerkowicz,1 * Colleen that lizards are subject to a speed- dependent axial constraint that prevents effective lung ventilation during locomotion, varanids use a positive pressure gular pump to assist lung ventilation. Disabling the gular pump

  4. Care of a cardiac pt on mechanical ventilation

    E-Print Network [OSTI]

    Kay, Mark A.

    Care of a cardiac pt on mechanical ventilation CVICU New Hires Orientation Day 2 Winnie Yung, RN, MN #12;Outline · Physiology of breathing · Terminology · Intubation · Mode of mechanical ventilation· Mode of mechanical ventilation · Nursing care of a vented pt · Nursing care of a vented single

  5. STATE OF CALIFORNIA INDOOR AIR QUALITY AND MECHANICAL VENTILATION

    E-Print Network [OSTI]

    STATE OF CALIFORNIA INDOOR AIR QUALITY AND MECHANICAL VENTILATION CEC- CF-6R-MECH-05 (Revised 08 Ventilation (Page 1 of 7) Site Address: Enforcement Agency: Permit Number: 2008 Residential Compliance Forms August 2009 Ventilation for Indoor Air Quality (IAQ): All dwelling units shall meet the requirements

  6. Improved Wireless Performance from Mode Scattering in Ventilation Ducts

    E-Print Network [OSTI]

    Stancil, Daniel D.

    Improved Wireless Performance from Mode Scattering in Ventilation Ducts Benjamin E. Henty, PA 15230. henty@eirp.org and stancil@cmu.edu Abstract Ventilation ducts are a convenient present in a ventilation duct T-junction and note with some surprise that improvement in the performance

  7. AIR FLOW MODELING IN DEEP WELLS: APPLICATION TO MINING VENTILATION

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    AIR FLOW MODELING IN DEEP WELLS: APPLICATION TO MINING VENTILATION E. WITRANT1, K.H. JOHANSSON2. Introduction Traditionally, the control of large-scale systems, such as mining ventilation, has been performed to the preliminary design of the global system and automation devices. Mining ventilation provides for an interesting

  8. Experimental Study of Ventilation Performance in Laboratories with Chemical Spills

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Experimental Study of Ventilation Performance in Laboratories with Chemical Spills Mingang Chemical spills occur frequently in laboratories. The current ventilation code for laboratories recommends a ventilation rate of 12 ACH for maintaining a safe laboratory environment. On the other hand, the energy saving

  9. AIR FLOW MODELING IN DEEP WELLS: APPLICATION TO MINING VENTILATION

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    AIR FLOW MODELING IN DEEP WELLS: APPLICATION TO MINING VENTILATION E. WITRANT1, K.H. JOHANSSON2, the control of large-scale systems, such as mining ventilation, has been performed locally with decentralized of the global system and automation devices. Mining ventilation provides for an interesting exam- ple

  10. Estimating ventilation time scales using overturning stream functions

    E-Print Network [OSTI]

    Döös, Kristofer

    Estimating ventilation time scales using overturning stream functions Bijoy Thompson & Jonas for estimating ventilation time scales from overturning stream functions is proposed. The stream function may describing an ide- alized semi-enclosed ocean basin ventilated through a narrow strait over a sill

  11. Utilizing Passive Ventilation to Complement HVAC Systems in Enclosed Buildings

    E-Print Network [OSTI]

    Mountziaris, T. J.

    Utilizing Passive Ventilation to Complement HVAC Systems in Enclosed Buildings Tom Rogg REU Student are important considerations in building design. Incorporation of a combination of passive ventilation systems of the National Science Foundation. Research Objectives · To provide proof of concept that a passive ventilation

  12. Natural Ventilation Design for Houses in Thailand Chalermwat Tantasavasdia

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Natural Ventilation Design for Houses in Thailand Chalermwat Tantasavasdia , Jelena Srebricb This paper explores the potential of using natural ventilation as a passive cooling system for new house conditions in Bangkok, the study found that it is possible to use natural ventilation to create a thermally

  13. Article original Influence du mode de ventilation des litires

    E-Print Network [OSTI]

    Boyer, Edmond

    Article original Influence du mode de ventilation des litières sur les émissions gazeuses d expérimentalement l'effet de la ventilation des litières sur le devenir de l'azote, dans un élevage intensif porcin systèmes de ventilation de litière (ascendante et descendante) sont testés par rapport à un système témoin

  14. Validation of CFD Simulations for Natural Ventilation , Camille Allocca1

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Validation of CFD Simulations for Natural Ventilation Yi Jiang1 , Camille Allocca1 , and Qingyan ventilation, which may provide occupants with good indoor air quality and a high level of thermal comfort-driven and buoyancy-drive natural ventilation. The validation of the CFD models used the experimental data of wind

  15. SURFACE CIRCULATION AND VENTILATION Lynne D. Talley(1)

    E-Print Network [OSTI]

    Talley, Lynne D.

    SURFACE CIRCULATION AND VENTILATION Lynne D. Talley(1) , Rana Fine(2) , Rick Lumpkin (3) , Nikolai by high frequency radars. Ventilation and upwelling processes connect the surface layer and underlying quantitative information on formation rates and residence times, and compelling evidence of decadal ventilation

  16. Should Title 24 Ventilation Requirements Be Amended to

    E-Print Network [OSTI]

    Should Title 24 Ventilation Requirements Be Amended to include an Indoor Air Quality Procedure Ventilation Requirements Be Amended to include an Indoor Air Quality Procedure? William J. Fisk, Spencer M Berkeley, CA 94720 May 10, 2013 ABSTRACT Minimum outdoor air ventilation rates (VRs) for buildings

  17. Estimating ventilation time scales using overturning stream functions

    E-Print Network [OSTI]

    Döös, Kristofer

    Estimating ventilation time scales using overturning stream functions Bijoy Thompson & Jonas 2014 # Springer-Verlag Berlin Heidelberg 2014 Abstract A simple method for estimating ventilation time-enclosed ocean basin ventilated through a narrow strait over a sill, and the result is compared to age estimates

  18. Harms of Unintentional Leaks during Volume Targeted Pressure Support Ventilation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Harms of Unintentional Leaks during Volume Targeted Pressure Support Ventilation Sonia Khirani1 Background: Volume targeted pressure support ventilation (VT-PSV) is a hybrid mode increasingly used. The objective of the study was to determine the ability of home ventilators to maintain the preset minimal VT

  19. "Passive Ventilation in a Simple Structure" Thomas Rogg

    E-Print Network [OSTI]

    Mountziaris, T. J.

    "Passive Ventilation in a Simple Structure" Thomas Rogg Faculty Mentor: Dr. Scott Civjan, Civil & Environmental Engineering The research concept is to investigate the addition of a passive ventilation system in a greener and more efficient ventilation system. The project is in the very early stages and I have been

  20. Variable ventilation induces endogenous surfactant release in normal guinea pigs

    E-Print Network [OSTI]

    Lutchen, Kenneth

    Variable ventilation induces endogenous surfactant release in normal guinea pigs Stephen P. Arold,1. Alencar, Kenneth R. Lutchen, and Edward P. Ingenito. Variable ventilation induces endogenous surfactant.00036.2003.--Variable or noisy ventilation, which includes random breath-to-breath variations in tidal

  1. TOP DOWN VENTILATION AND COOLING Stephen A. Gage

    E-Print Network [OSTI]

    Linden, Paul F.

    TOP DOWN VENTILATION AND COOLING Stephen A. Gage G.R. Hunt P.F. Linden This paper examines the problems inherent in passively ventilating and cooling low and medium rise urban buildings. We focus openings in passive displacement ventilation systems. A solution is suggested. The concept that is examined

  2. Measuring Residential Ventilation System Airflows: Part 2 -Field

    E-Print Network [OSTI]

    1 Measuring Residential Ventilation System Airflows: Part 2 - Field Evaluation of Airflow Meter Residential Ventilation System Airflows: Part 2 - Field Evaluation of Airflow Meter Devices and System Flow, mechanical ventilation, measurement, ASHRAE 62.2, flow hood ABSTRACT The 2008 California State Energy Code

  3. Ventilation planning at Energy West's Deer Creek mine

    SciTech Connect (OSTI)

    Tonc, L.; Prosser, B.; Gamble, G. [Pacific Corp., Huntington, UT (United States)

    2009-08-15T23:59:59.000Z

    In 2004 ventilation planning was initiated to exploit a remote area of Deer Creek mine's reserve (near Huntington, Utah), the Mill Fork Area, located under a mountain. A push-pull ventilation system was selected. This article details the design process of the ventilation system upgrade, the procurement process for the new fans, and the new fan startup testing. 5 figs., 1 photo.

  4. Optimal decision making in ventilation control Andrew Kusiak*, Mingyang Li

    E-Print Network [OSTI]

    Kusiak, Andrew

    by heating, ventilating and air- conditioning (HVAC) systems. According to published statistics, HVAC systemsOptimal decision making in ventilation control Andrew Kusiak*, Mingyang Li Department of Mechanical Accepted 24 July 2009 Available online 15 August 2009 Keywords: Ventilation Air quality Multi

  5. MINING VENTILATION CONTROL: A NEW INDUSTRIAL CASE FOR WIRELESS AUTOMATION

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    % of the energy consumed by the mining process goes into the ventilation (including heating the air). It is clearMINING VENTILATION CONTROL: A NEW INDUSTRIAL CASE FOR WIRELESS AUTOMATION E. Witrant1, A. D This paper serves as an introduction to Special Session on Ventilation Control in Large-Scale Systems. We de

  6. CONFIDENTIAL: DO NOT QUOTE 1 Equivalence in Ventilation and

    E-Print Network [OSTI]

    CONFIDENTIAL: DO NOT QUOTE 1 Equivalence in Ventilation and Indoor Air Quality M. H. Sherman, I ventilate buildings to provide acceptable indoor air quality (IAQ). Ventilation standards (such as American Society of Heating, Refrigerating, and Air-Conditioning Enginners [ASHRAE] Standard 62) specify minimum

  7. Mining ventilation control: a new industrial case for wireless automation

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    system with high envi- ronmental impact: the mining ventilation. We do not pretend to solve the global ventilation is an interesting example of a large scale system with high environmental impact where advancedMining ventilation control: a new industrial case for wireless automation E. Witrant1, A. D

  8. Effect of repository underground ventilation on emplacement drift temperature control

    SciTech Connect (OSTI)

    Yang, H.; Sun, Y.; McKenzie, D.G.; Bhattacharyya, K.K. [Morrison Knudson Corporation, Las Vegas, NV (United States)

    1996-02-01T23:59:59.000Z

    The repository advanced conceptual design (ACD) is being conducted by the Civilian Radioactive Waste Management System, Management & Operating Contractor. Underground ventilation analyses during ACD have resulted in preliminary ventilation concepts and design methodologies. This paper discusses one of the recent evaluations -- effects of ventilation on emplacement drift temperature management.

  9. Enthalpies of Vaporization and Vapor Pressures of Some Deuterated Hydrocarbons. Liquid-Vapor Pressure Isotope Effects

    E-Print Network [OSTI]

    Chickos, James S.

    Enthalpies of Vaporization and Vapor Pressures of Some Deuterated Hydrocarbons. Liquid hydrocarbons and their perdeuterated analogues have been determined by correlation-gas chromatography of cyclohexane-d12 and benzene-d6. Other hydrocarbons studied include the perdeuterated forms of hexane, toluene

  10. Hood Commissioning Laboratory Ventilation Management Program

    E-Print Network [OSTI]

    Pawlowski, Wojtek

    Hood Commissioning Laboratory Ventilation Management Program Form In the interest of efficiency and effective use of our limited resources, EHS will not initiate or schedule the commissioning process for any____Other (describe) Hood is:______New _______Relocated_______Reconfigured (Describe ) Requested Commissioning Date (s

  11. Mixed-Mode Ventilation and Building Retrofits

    E-Print Network [OSTI]

    Brager, Gail; Ackerly, Katie

    2010-01-01T23:59:59.000Z

    of low-energy ventilation strategies in four generalized UKUK offices: How adaptive comfort theories might influence future low energy office refurbishment strategies’,UK Department of the Environment, Transport and the Regions’ Energy Efficiency Best Practice Programme Numerous guidelines for developing the most appropriate design strategy

  12. Does Mixing Make Residential Ventilation More Effective?

    SciTech Connect (OSTI)

    Sherman, Max; Walker, Iain

    2010-08-16T23:59:59.000Z

    Ventilation dilutes or removes indoor contaminants to reduce occupant exposure. In a multi-zone environment such as a house, there will be different dilution rates and different source strengths in every zone. The total ventilation rate is the most important factor in determining the exposure of occupants to given sources, but the zone- specific distribution of exhaust and supply air, and the mixing of ventilation air can have significant roles. Different types of ventilation systems will provide different amounts of mixing depending on several factors such as air leakage through the building envelope, air distribution systems and the location of sources and occupants. This paper reports recent results of investigations to determine the impact that air mixing has on exposures of residential occupants to prototypical contaminants of concern. Evaluations of existing field measurements and simulations reported in the literature are combined with new analyses to provide an integrated overview of the topic. The results show that for extreme cases additional mixing can be a significant factor but for typical homes looking at average exposures mixing is not helpful and can even make exposures worse.

  13. Modeling particle loss in ventilation ducts

    SciTech Connect (OSTI)

    Sippola, Mark R.; Nazaroff, William W.

    2003-04-01T23:59:59.000Z

    Empirical equations were developed and applied to predict losses of 0.01-100 {micro}m airborne particles making a single pass through 120 different ventilation duct runs typical of those found in mid-sized office buildings. For all duct runs, losses were negligible for submicron particles and nearly complete for particles larger than 50 {micro}m. The 50th percentile cut-point diameters were 15 {micro}m in supply runs and 25 {micro}m in return runs. Losses in supply duct runs were higher than in return duct runs, mostly because internal insulation was present in portions of supply duct runs, but absent from return duct runs. Single-pass equations for particle loss in duct runs were combined with models for predicting ventilation system filtration efficiency and particle deposition to indoor surfaces to evaluate the fates of particles of indoor and outdoor origin in an archetypal mechanically ventilated building. Results suggest that duct losses are a minor influence for determining indoor concentrations for most particle sizes. Losses in ducts were of a comparable magnitude to indoor surface losses for most particle sizes. For outdoor air drawn into an unfiltered ventilation system, most particles smaller than 1 {micro}m are exhausted from the building. Large particles deposit within the building, mostly in supply ducts or on indoor surfaces. When filters are present, most particles are either filtered or exhausted. The fates of particles generated indoors follow similar trends as outdoor particles drawn into the building.

  14. Ventilation of the Baltic Sea deep water

    E-Print Network [OSTI]

    Mohrholz, Volker

    , Powstaców Warszawy 55, PL­81­712 Sopot, Poland 4 Department of Oceanography, G¨oteborg University, Box 460 by thermohaline intrusions, ventilate the deep water of the eastern Gotland Basin. A recent study of the energy that about 30% of the energy needed below the halocline for deep water mixing is explained by the breaking

  15. A Bench Study of Intensive Care Unit Ventilators: New versus Old and Turbine-Based versus Compressed Gas-Based Ventilators

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . Material: Four turbine- based ventilators and nine conventional servo-valve compressed-gas ventilators were1 A Bench Study of Intensive Care Unit Ventilators: New versus Old and Turbine-Based versus patient's effort. On average, turbine-based ventilators performed better than conventional ventilators

  16. International Journal of Ventilation ISSN 1473-3315 Volume 4 No 4 Interacting Turbulent Plumes in a Naturally Ventilated Enclosure

    E-Print Network [OSTI]

    Linden, Paul F.

    International Journal of Ventilation ISSN 1473-3315 Volume 4 No 4 ________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________ 301 Interacting Turbulent Plumes in a Naturally Ventilated Enclosure P. F. Linden1 and N. B. Kaye2 1 of turbulent plumes is examined in the context of building ventilation flows. Recent models for natural

  17. On The Valuation of Infiltration towards Meeting Residential Ventilation Needs

    SciTech Connect (OSTI)

    Sherman, Max H.

    2008-09-01T23:59:59.000Z

    The purpose of ventilation is dilute or remove indoor contaminants that an occupant is exposed to. It can be provided by mechanical or natural means. In most homes, especially existing homes, infiltration provides the dominant fraction of the ventilation. As we seek to provide acceptable indoor air quality at minimum energy cost, it is important to neither over-ventilate nor under-ventilate. Thus, it becomes critically important to correctly evaluate the contribution infiltration makes to both energy consumption and equivalent ventilation. ASHRAE Standards including standards 62, 119, and 136 have all considered the contribution of infiltration in various ways, using methods and data from 20 years ago.

  18. Power Recovery

    E-Print Network [OSTI]

    Murray, F.

    , will be the use of the ASTM Theoretical Steam Rate Tables. In addition, the author's experience regarding the minimum size for power recovery units that are economic in a Culf Coast plant will be presented. INTROD\\Jr.'rION When surveying an operation... will be discussed in detail. Each term in the equation will be considered in English units. Secondly, the use of Mollier diagrams to estimate the enthalphy change between the initial and final conditions will be considered. The last method, specific to steam...

  19. Temperature stratification and air change effectiveness in a high cooling load office with two heat source heights in a combined chilled ceiling and displacement ventilation system

    E-Print Network [OSTI]

    Schiavon, Stefano; Bauman, Fred; Tully, Brad; Rimmer, Julian

    2012-01-01T23:59:59.000Z

    ceiling and displacement ventilation system. Submitted toceiling and displacement ventilation system. Submitted toceiling and displacement ventilation systems, Energy Build.

  20. Energy and Enthalpy Distribution Functions for a Few Physical Systems K. L. Wu, J. H. Wei, S. K. Lai,*, and Y. Okabe

    E-Print Network [OSTI]

    of the energy or enthalpy distribution functions of the bulk and finite-sized systems by Poland,8-17 whoEnergy and Enthalpy Distribution Functions for a Few Physical Systems K. L. Wu, J. H. Wei, S. K is devoted to extracting the energy or enthalpy distribution function of a physical system from the moments

  1. Performance Assessment of Photovoltaic Attic Ventilator Fans

    Broader source: Energy.gov [DOE]

    A case study of photovoltaic attic ventilator fans was conducted on an occupied single family home in Central Florida. Two fans were installed at mid-summer in an instrumented home where attic air temperature, meteorological conditions and space cooling electric power were measured. The home already had an attic radiant barrier, but still experienced attic air temperatures in excess of 130oF.

  2. Advanced Controls for Residential Whole-House Ventilation Systems

    SciTech Connect (OSTI)

    Turner, William; Walker, Iain; Sherman, Max

    2014-08-01T23:59:59.000Z

    Whole-house ventilation systems are becoming commonplace in new construction, remodeling/renovation, and weatherization projects, driven by combinations of specific requirements for indoor air quality (IAQ), health and compliance with standards, such as ASHRAE 62.2. Ventilation systems incur an energy penalty on the home via fan power used to drive the airflow, and the additional space-conditioning load associated with heating or cooling the ventilation air. Finding a balance between IAQ and energy use is important if homes are to be adequately ventilated while not increasing the energy burden. This study used computer simulations to examine RIVEC the Residential Integrated Ventilation Controller - a prototype ventilation controller that aims to deliver whole-house ventilation rates that comply with ventilation standards, for the minimum use of energy. Four different whole-house ventilation systems were simulated, both with and without RIVEC, so that the energy and IAQ results could be compared. Simulations were conducted for 13 US climate zones, three house designs, and three envelope leakage values. The results showed that the RIVEC controller could typically return ventilation energy savings greater than 40percent without compromising long-term chronic or short-term acute exposures to relevant indoor contaminants. Critical and average peak power loads were also reduced as a consequence of using RIVEC.

  3. Thermodynamics of Uranyl Minerals: Enthalpies of Formation of Uranyl Oxide Hydrates

    SciTech Connect (OSTI)

    K. Kubatko; K. Helean; A. Navrotsky; P.C. Burns

    2005-05-11T23:59:59.000Z

    The enthalpies of formation of seven uranyl oxide hydrate phases and one uranate have been determined using high-temperature oxide melt solution calorimetry: [(UO{sub 2}){sub 4}O(OH){sub 6}](H{sub 2}O){sub 5}, metaschoepite; {beta}-UO{sub 2}(OH){sub 2}; CaUO{sub 4}; Ca(UO{sub 2}){sub 6}O{sub 4}(OH){sub 6}(H{sub 2}O){sub 8}, becquerelite; Ca(UO{sub 2}){sub 4}O{sub 3}(OH){sub 4}(H{sub 2}O){sub 2}; Na(UO{sub 2})O(OH), clarkeite; Na{sub 2}(UO{sub 2}){sub 6}O{sub 4}(OH){sub 6}(H{sub 2}O){sub 7}, the sodium analogue of compreignacite and Pb{sub 3}(UO{sub 2}){sub 8}O{sub 8}(OH){sub 6}(H{sub 2}O){sub 2}, curite. The enthalpy of formation from the binary oxides, {Delta}H{sub f-ox}, at 298 K was calculated for each compound from the respective drop solution enthalpy, {Delta}H{sub ds}. The standard enthalpies of formation from the elements, {Delta}H{sub f}{sup o}, at 298 K are -1791.0 {+-} 3.2, -1536.2 {+-} 2.8, -2002.0 {+-} 3.2, -11389.2 {+-} 13.5, -6653.1 {+-} 13.8, -1724.7 {+-} 5.1, -10936.4 {+-} 14.5 and -13163.2 {+-} 34.4 kJ mol{sup -1}, respectively. These values are useful in exploring the stability of uranyl oxide hydrates in auxiliary chemical systems, such as those expected in U-contaminated environments.

  4. Adsorption calorimetry in enhanced oil recovery

    SciTech Connect (OSTI)

    Noll, L.A.

    1988-05-01T23:59:59.000Z

    Adsorption calorimetry is a technique which has been used at the National Institute for Petroleum and Energy Reserch (NIPER) to help in the understanding of adsorption as it impacts enhanced oil recovery by chemical flooding. Abstraction of chemicals by reservoir minerals comprises a major obstacle to the technical and economic success of this process. Adsorption is also important in other fields such as catalysis, lubrication, ore flotation, and printing. Adsorption calorimetry is useful because it measures both the amount of adsorption and its enthalpy. The enthalpy helps to guide the extrapolation of adsorption to higher temperatures as well as acting as a probe of surface properties such as heterogeneity. Adsorption calorimetry helps to distinguish physical from chemisorption. It is also useful in distinguishing water-wet from oil-wet surfaces. This paper discusses flow adsorption calorimetry. The advantage of using a flowing system over the classic immersion technique is that it is fast and easy to use, and data for the entire isotherm are collected on a single sample of solid. In flow calorimetry the surface excess amount and the thermal data are obtained simultaneously on one and the same sample of solid, thus avoiding some sampling problems. Some disadvantages of the method are somewhat short equilibration times and the cumulative nature of the data. Aspects of adsorption of special interest to enhanced oil recovery such as the nature and charge of minerals, the structure and charge of surfactants, the effects of brine and temperature, and the effects of aqueous or hydrocarbon environment are important parameters of surfactant flooding; they are treated in this paper.

  5. Final Report Balancing energy conservation and occupant needs in ventilation rate standards for Big Box stores in California: predicted indoor air quality and energy consumption using a matrix of ventilation scenarios

    E-Print Network [OSTI]

    Apte, Michael G.

    2013-01-01T23:59:59.000Z

    evaluation of displacement ventilation and dedicated outdoorB, Carlson N (2009). Ventilation requirements in a retailof Intermittent Ventilation for Providing Acceptable Indoor

  6. Final Report Balancing energy conservation and occupant needs in ventilation rate standards for Big Box stores in California: predicted indoor air quality and energy consumption using a matrix of ventilation scenarios

    E-Print Network [OSTI]

    Apte, Michael G.

    2013-01-01T23:59:59.000Z

    Air cleaning and local ventilation near strong sources bothair cleaning, and local ventilation may be needed at reducedremoval, air cleaning, and local ventilation may be the best

  7. Determination of ideal-gas enthalpies of formation for key compounds:

    SciTech Connect (OSTI)

    Steele, W.V.; Chirico, R.D.; Nguyen, A.; Hossenlopp, I.A.; Smith, N.K.

    1991-10-01T23:59:59.000Z

    The results of a study aimed at improvement of group-contribution methodology for estimation of thermodynamic properties of organic and organosilicon substances are reported. Specific weaknesses where particular group-contribution terms were unknown, or estimated because of lack of experimental data, are addressed by experimental studies of enthalpies of combustion in the condensed phase, vapor-pressure measurements, and differential scanning calorimetric (d.s.c.) heat-capacity measurements. Ideal-gas enthalpies of formation of ({plus minus})-butan-2-ol, tetradecan-1-ol, hexan-1,6-diol, methacrylamide, benzoyl formic acid, naphthalene-2,6-dicarboxylic acid dimethyl ester, and tetraethylsilane are reported. A crystalline-phase enthalpy of formation at 298.15 K was determined for naphthalene-2,6-dicarboxylic acid, which decomposed at 695 K before melting. The combustion calorimetry of tetraethylsilane used the proven fluorine-additivity methodology. Critical temperature and critical density were determined for tetraethylsilane with differential scanning calorimeter and the critical pressure was derived. Group-additivity parameters useful in the application of group- contribution correlations are derived. 112 refs., 13 figs., 19 tabs.

  8. The Ocean's Memory of the Atmosphere: Residence-Time and Ventilation-Rate Distributions of Water Masses

    E-Print Network [OSTI]

    Primeau, Francois W; Holzer, Mark

    2006-01-01T23:59:59.000Z

    in steady state. Local ventilation rates for non- steadyrespec- tively. The local ventilation fluxes regardless ofmaps of ventilation The residence-time-partitioned, local

  9. Heating, Ventilating, and Air-Conditioning: Recent Advances in Diagnostics and Controls to Improve Air-Handling System Performance

    E-Print Network [OSTI]

    Wray, Craig P.

    2008-01-01T23:59:59.000Z

    Heating, Ventilating, and Air-Conditioning: Recent Advancesthe energy efficiency of many heating, ventilating, and air-system, which delivers heating, cooling, and ventilation air

  10. THE EFFECTS OF ENERGY-EFFICIENT VENTILATION RATES ON INDOOR AIR QUALITY AT AN OHIO ELEMENTARY SCHOOL

    E-Print Network [OSTI]

    Berk, J.V.

    2013-01-01T23:59:59.000Z

    To determine the ventilation~heating load for the 2778calculations of ventilation~heating load 19 in variousthrough heating, cooling, and ventilation (see Figure l).

  11. HOSPITAL VENTILATION STANDARDS AND ENERGY CONSERVATION: A SUMMARY OF THE LITERATURE WITH CONCLUSIONS AND RECOMMENDATIONS, FY 78 FINAL REPORT

    E-Print Network [OSTI]

    DeRoos, R.L.

    2011-01-01T23:59:59.000Z

    to prelude higher ventilation heating or cooling. InRequirements: --The ventilation, heating, air conditioning,and comfort. --The ventilation, heating, air conditioning,

  12. Indoor Airflow And Pollutant Removal In A Room With Floor-Based Task Ventilation: Results of Additional Experiments

    E-Print Network [OSTI]

    Faulkner, D.

    2011-01-01T23:59:59.000Z

    C , "Displacement Ventilation Systems in Office Rooms,"Controlled Office Ventilation System," ASHRAE Transactions,of a floor-based task ventilation system designed for use in

  13. An Index for Evaluation of Air Quality Improvement in Rooms with Personalized Ventilation Based on Occupied Density and Normalized Concentration

    E-Print Network [OSTI]

    Schiavon, Stefano; Melikov, Arsen; Cermak, Radim; De Carli, Michele; Li, Xianting

    2007-01-01T23:59:59.000Z

    potential of personalized ventilation system in the tropics.edge mounted task ventilation system. Proceedings of Indoorwith a total-volume ventilation system. The index is applied

  14. HOSPITAL VENTILATION STANDARDS AND ENERGY CONSERVATION: A SUMMARY OF THE LITERATURE WITH CONCLUSIONS AND RECOMMENDATIONS, FY 78 FINAL REPORT

    E-Print Network [OSTI]

    DeRoos, R.L.

    2011-01-01T23:59:59.000Z

    laminar") flow ventilation system for patient isolation.MICHAELSEN, G. S. Ventilation system maintenance practices:1974. A new ventilation system for cleaner operating

  15. Reducing Mortality from Terrorist Releases of Chemical and Biological Agents: I. Filtration for Ventilation Systems in Commercial Building

    E-Print Network [OSTI]

    Thatcher, Tracy L.

    2011-01-01T23:59:59.000Z

    Filtration for Ventilation Systems in Commercial BuildingsFiltration for Ventilation Systems in Commercial Buildingsbuilding's mechanical ventilation system and by infiltration

  16. Energy analysis of a personalized ventilation system in a cold climate: influence of the supplied air temperature

    E-Print Network [OSTI]

    Schiavon, Stefano; Melikov, Arsen

    2008-01-01T23:59:59.000Z

    potential of personalized ventilation system in the tropics.a chair-based personalized ventilation system. Building andedged-mounted task ventilation system. Indoor Air, Vol. 14 (

  17. A Survey and Critical Review of the Literature on Indoor Air Quality, Ventilation and Health Symptoms in Schools

    E-Print Network [OSTI]

    Daisey, Joan M.

    2010-01-01T23:59:59.000Z

    between seasons and ventilation systems, Proceedings ofto Old school: ventilation system, one constructed prior toall had mechanical ventilation systems of some type. C 0

  18. A Survey and Critical Review of the Literature on Indoor Air Quality, Ventilation and Health Symptoms in Schools

    E-Print Network [OSTI]

    Daisey, Joan M.

    2010-01-01T23:59:59.000Z

    is experiencing IAQ and ventilation problems, and relatedis experiencing IAQ and ventilation problems, and relatedof air quality and ventilation problems in California

  19. HOSPITAL VENTILATION STANDARDS AND ENERGY CONSERVATION: A SUMMARY OF THE LITERATURE WITH CONCLUSIONS AND RECOMMENDATIONS, FY 78 FINAL REPORT

    E-Print Network [OSTI]

    DeRoos, R.L.

    2011-01-01T23:59:59.000Z

    the largest problem facing the ventilation engineer; sourcesthe heating and ventilation was already a problem. 6 In thethe hospital odor problem with regards to ventilation rates.

  20. Computer Simulation of Cooling Effect of Wind Tower on Passively Ventilated Building

    E-Print Network [OSTI]

    Seryak, J.; Kissock, J. K.

    2002-01-01T23:59:59.000Z

    Computer Simulation of Cooling Effect of Wind Tower on Passively Ventilated Building John Seryak Kelly Kissock Project Engineer Associate Professor Department of Mechanical and Aerospace Engineering... University of Dayton Dayton, Ohio ABSTRACT Traditional buildings are cooled and ventilated by mechanically induced drafts. Natural ventilation aspires to cool and ventilate a building by natural means, such as cross ventilation or wind towers...

  1. Microsoft Word - Determination of Class to Update Ventilation...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Solutions LLC Original Signatures on File Determination of Class Modification Update Ventilation Language for Consistency Waste Isolation Pilot Plant Carlsbad, New Mexico Permit...

  2. Summer Infiltration/Ventilation Test Results from the FRTF Laboratory

    Broader source: Energy.gov (indexed) [DOE]

    Summer InfiltrationVentilation Test Results from the FRTF Laboratory Building America Technical Review Meeting April 29-30, 2013 A Research Institute of the University of Central...

  3. Energy-saving strategies with personalized ventilation in cold climates

    E-Print Network [OSTI]

    Schiavon, Stefano; Melikov, Arsen

    2009-01-01T23:59:59.000Z

    Energy-saving strategies with personalized ventilation inalone if energy-saving strategies are not applied. TheHowever, this energy- saving strategy can be recommended

  4. Natural Ventilation for Energy Savings in California Commercial Buildings

    E-Print Network [OSTI]

    2014-01-01T23:59:59.000Z

    heating, ventilating and air conditioning survey of small2004) Workplace air-conditioning and health servicesventilating, and air-conditioning applications. Bauman, F. ,

  5. Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements

    Broader source: Energy.gov [DOE]

    This Building America webinar, held on Sept. 24, 2014, focused on key challenges in multifamily ventilation and strategies to address these challenges.

  6. Measured Air Distribution Effectiveness for Residential Mechanical Ventilation Systems

    E-Print Network [OSTI]

    Sherman, Max H.

    2008-01-01T23:59:59.000Z

    In Review J. Indoor Air) 2007 LBNL-63193 Tarantola, Albert,Gas Measurement to Determine Air Movements in a House,Measurement Techniques”, Air Infiltration and Ventilation

  7. Summary of Workshop: Barriers to Energy Efficient Residential Ventilation

    E-Print Network [OSTI]

    Sherman, Max

    2008-01-01T23:59:59.000Z

    quality problems. Traditionally residential ventilation wasquality problems such as moisture. Residential ventilationventilation air is only one way of tackling the R H problem

  8. Position paper -- Tank ventilation system design air flow rates

    SciTech Connect (OSTI)

    Goolsby, G.K.

    1995-01-04T23:59:59.000Z

    The purpose of this paper is to document a project position on required ventilation system design air flow rates for the waste storage tanks currently being designed by project W-236A, the Multi-Function Waste Tank Facility (MWTF). The Title 1 design primary tank heat removal system consists of two systems: a primary tank vapor space ventilation system; and an annulus ventilation system. At the conclusion of Title 1 design, air flow rates for the primary and annulus ventilation systems were 960 scfm and 4,400 scfm, respectively, per tank. These design flow rates were capable of removing 1,250,000 Btu/hr from each tank. However, recently completed and ongoing studies have resulted in a design change to reduce the extreme case heat load to 700,000 Btu/hr. This revision of the extreme case heat load, coupled with results of scale model evaporative testing performed by WHC Thermal Hydraulics, allow for a reduction of the design air flow rates for both primary and annulus ventilation systems. Based on the preceding discussion, ICF Kaiser Hanford Co. concludes that the design should incorporate the following design air flow rates: Primary ventilation system--500 scfm maximum and Annulus ventilation system--1,100 scfm maximum. In addition, the minimum air flow rates in the primary and annulus ventilation systems will be investigated during Title 2 design. The results of the Title 2 investigation will determine the range of available temperature control using variable air flows to both ventilation systems.

  9. Guide to Closing and Conditioning Ventilated Crawlspaces

    SciTech Connect (OSTI)

    Dickson, B.

    2013-01-01T23:59:59.000Z

    This how-to guide explains the issues and concerns with conventional ventilated crawlspaces and provides prescriptive measures for improvements that will create healthier and more durable spaces. The methods described in this guide are not the only acceptable ways to treat a crawlspace but represent a proven strategy that works in many areas of the United States. The designs discussed in this guide may or may not meet the local building codes and as such will need to be researched before beginning the project.

  10. Ventilation System Basics | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you sureReportsofDepartmentSeries |Attacks | DepartmentVentilation System Basics

  11. Microsoft Word - Ventilation System Sampling Results 1

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHighandSWPA / SPRA / USACE625 FINALOptimizationFor Immediate48Ventilation

  12. OCCUPANT-GENERATED CO2 AS AN INDICATOR OF VENTILATION RATE

    E-Print Network [OSTI]

    Turiel, Isaac

    2012-01-01T23:59:59.000Z

    1977. 7. Hunt, C.M. , "Ventilation Measurements in theJ. , and Hollowell, C.D. , Ventilation on Indoor Quality inThe Effect of Reduced Ventilation on Indoor Air Quality And

  13. Modeling indoor exposures to VOCs and SVOCs as ventilation rates vary

    E-Print Network [OSTI]

    Parthasarathy, Srinandini

    2013-01-01T23:59:59.000Z

    J. 2008. Analysis of ventilation data from the United StatesASHRAE Standard 62.1-2010, Ventilation for Acceptable Indoorto VOCs and   SVOCs as ventilation rates vary   Srinandini 

  14. Circulation . Author manuscript Ultrafast and whole-body cooling with total liquid ventilation induces

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ventilation induces favorable neurological and cardiac outcomes after cardiac arrest in rabbits Mourad decrease after resuscitation. Since total liquid ventilation (TLV) with temperature controlled ; physiology ; Liquid Ventilation ; Liver ; physiology ; Lung ; physiology ; Nervous System Physiological

  15. Oceanic ventilation and biogeochemical cycling: Understanding the physical mechanisms that produce realistic distributions of tracers and

    E-Print Network [OSTI]

    Matsumoto, Katsumi

    Oceanic ventilation and biogeochemical cycling: Understanding the physical mechanisms that produce circulation support different rates of ventilation, which in turn produce different distributions. Matsumoto, J. L. Sarmiento, R. D. Slater, and P. S. Swathi (2004), Oceanic ventilation and biogeochemical

  16. Modeling Ventilation in Multifamily Buildings John Markley, University of California, Davis -Western Cooling Efficiency Center

    E-Print Network [OSTI]

    California at Davis, University of

    Modeling Ventilation in Multifamily Buildings John Markley, University of California, Davis Efficiency Center Garth Torvestad, Benningfield Group, inc. ABSTRACT Proper ventilation is an essential that require special consideration in order to avoid excessive ventilation and energy waste. Two issues

  17. `Perfect ventilation, good sewerage and effective water closets': Urban factors in the development

    E-Print Network [OSTI]

    `Perfect ventilation, good sewerage and effective water closets': Urban factors in the development sanitation ``Perfect ventilation, good sewerage and effective water closets': Urban factors ventilation, good sewerage and effective water closets': Urban factors in the development of modern nursing

  18. Gaseous effluents from the combustion of nanocomposites in controlled-ventilation conditions

    E-Print Network [OSTI]

    Boyer, Edmond

    Gaseous effluents from the combustion of nanocomposites in controlled-ventilation conditions D on the combustion of nanocomposite samples under various ventilation conditions. Tests have been performed ammonium polyphosphate in equal proportions. During testing, the ventilation-controlled conditions were

  19. UBC Social Ecological Economic Development Studies (SEEDS) Student Report CIRS Auditorium Ventilation System

    E-Print Network [OSTI]

    Ventilation System: Adequacy Assessment, Energy Consumption and Comfort of the Living Space Provided Prepared of a project/report". #12;CEEN 596 FINAL PROJECT REPORT CIRS Auditorium Ventilation System: Adequacy Assessment...........................................................................................13 a) The Ventilation System

  20. Commissioning of a Coupled Earth Tube and Natural Ventilation System at the Acceptance Phase

    E-Print Network [OSTI]

    Pan, S.; Zheng, M.; Yoshida, H.

    In this paper, the environment and energy performance of an actual coupled earth tube and natural ventilation system in a gymnasium was measured during the acceptance phase in two operation states: no ventilation and natural ventilation. From...

  1. Sensitivity of Tropical Cyclone Intensity to Ventilation in an Axisymmetric Model

    E-Print Network [OSTI]

    Tang, Brian

    The sensitivity of tropical cyclone intensity to ventilation of cooler, drier air into the inner core is examined using an axisymmetric tropical cyclone model with parameterized ventilation. Sufficiently strong ventilation ...

  2. Numerical Simulation of a Displacement Ventilation System with Multi-heat Sources and Analysis of Influential Factors

    E-Print Network [OSTI]

    Wu, X.; Gao, J.; Wu, W.

    2006-01-01T23:59:59.000Z

    Displacement ventilation (DV) is a promising ventilation concept due to its high ventilation efficiency. In this paper, the application of the CFD method, the velocity and temperature fields of three-dimensional displacement ventilation systems...

  3. Mass and Heat Recovery

    E-Print Network [OSTI]

    Hindawai, S. M.

    2010-01-01T23:59:59.000Z

    - 1 - MASS AND HEAT RECOVERY SYSTEM SALAH MAHMOUD HINDAWI DIRECTOR HINDAWI FOR ENGINEERING SERVICES & CONTRACTING NEW DAMIETTA , EGYPT ABSTRACT : In the last few years heat recovery was under spot . and in air conditioning fields... ) as a heat recovery . and I use the water as a mass recovery . The source of mass and heat recovery is the condensate water which we were dispose and connect it to the drain lines . THE BENEFIT OF THIS SYSTEM ARE : 1) Using the heat energy from...

  4. Maintenance Guide for Greenhouse Ventilation, Evaporative Cooling Heating Systems1

    E-Print Network [OSTI]

    Watson, Craig A.

    when the need is discovered, but a good preventive maintenance program will reduce the number. This fact sheet will emphasize corrective and preventive maintenance procedures for ventilation, evaporativeAE26 Maintenance Guide for Greenhouse Ventilation, Evaporative Cooling Heating Systems1 D. E

  5. ASHRAE Standard 62.2. Ventilation and Acceptable Indoor Air Quality...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ASHRAE Standard 62.2. Ventilation and Acceptable Indoor Air Quality in Low- Rise Residential Buildings - Building America Top Innovation ASHRAE Standard 62.2. Ventilation and...

  6. Buoyancy-Driven Ventilation of Hydrogen from Buildings: Laboratory Test and Model Validation

    SciTech Connect (OSTI)

    Barley, C. D.; Gawlik, K.

    2009-05-01T23:59:59.000Z

    Passive, buoyancy-driven ventilation is one approach to limiting hydrogen concentration. We explored the relationship between leak rate, ventilation design, and hydrogen concentrations.

  7. A Survey and Critical Review of the Literature on Indoor Air Quality, Ventilation and Health Symptoms in Schools

    E-Print Network [OSTI]

    Daisey, Joan M.

    2010-01-01T23:59:59.000Z

    rate over- estimates the local ventilation rate of occupied1992); no local exhaust ventilation for photocopiers that

  8. An Index for Evaluation of Air Quality Improvement in Rooms with Personalized Ventilation Based on Occupied Density and Normalized Concentration

    E-Print Network [OSTI]

    Schiavon, Stefano; Melikov, Arsen; Cermak, Radim; De Carli, Michele; Li, Xianting

    2007-01-01T23:59:59.000Z

    Journal of heating, Ventilation and Refrigeration Research,on Cold Climate, Heating, Ventilation and Air-Conditioning,

  9. Ventilation Systems Operating Experience Review for Fusion Applications

    SciTech Connect (OSTI)

    Cadwallader, Lee Charles

    1999-12-01T23:59:59.000Z

    This report is a collection and review of system operation and failure experiences for air ventilation systems in nuclear facilities. These experiences are applicable for magnetic and inertial fusion facilities since air ventilation systems are support systems that can be considered generic to nuclear facilities. The report contains descriptions of ventilation system components, operating experiences with these systems, component failure rates, and component repair times. Since ventilation systems have a role in mitigating accident releases in nuclear facilities, these data are useful in safety analysis and risk assessment of public safety. An effort has also been given to identifying any safety issues with personnel operating or maintaining ventilation systems. Finally, the recommended failure data were compared to an independent data set to determine the accuracy of individual values. This comparison is useful for the International Energy Agency task on fusion component failure rate data collection.

  10. Measure Guideline: Selecting Ventilation Systems for Existing Homes

    SciTech Connect (OSTI)

    Aldrich, R.

    2014-02-01T23:59:59.000Z

    This document addresses adding -or improving - mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes, and this report discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards. Advantages, disadvantages, and approximate costs of various system types are presented along with general guidelines for implementing the systems in homes. CARB intends for this document to be useful to decision makers and contractors implementing ventilation systems in homes. Choosing the "best" system is not always straightforward; selecting a system involves balancing performance, efficiency, cost, required maintenance, and several other factors. It is the intent of this document to assist contractors in making more informed decisions when selecting systems. Ventilation is an integral part of a high-performance home. With more air-sealed envelopes, a mechanical means of removing contaminants is critical for indoor environmental quality and building durability.

  11. Ventilation System Effectiveness and Tested Indoor Air Quality Impacts

    SciTech Connect (OSTI)

    Rudd, A.; Bergey, D.

    2014-02-01T23:59:59.000Z

    Ventilation system effectiveness testing was conducted at two unoccupied, single-family, detached lab homes at the University of Texas - Tyler. Five ventilation system tests were conducted with various whole-building ventilation systems. Multizone fan pressurization testing characterized building and zone enclosure leakage. PFT testing showed multizone air change rates and interzonal airflow. Cumulative particle counts for six particle sizes, and formaldehyde and other Top 20 VOC concentrations were measured in multiple zones. The testing showed that single-point exhaust ventilation was inferior as a whole-house ventilation strategy. It was inferior because the source of outside air was not direct from outside, the ventilation air was not distributed, and no provision existed for air filtration. Indoor air recirculation by a central air distribution system can help improve the exhaust ventilation system by way of air mixing and filtration. In contrast, the supply and balanced ventilation systems showed that there is a significant benefit to drawing outside air from a known outside location, and filtering and distributing that air. Compared to the Exhaust systems, the CFIS and ERV systems showed better ventilation air distribution and lower concentrations of particulates, formaldehyde and other VOCs. System improvement percentages were estimated based on four System Factor Categories: Balance, Distribution, Outside Air Source, and Recirculation Filtration. Recommended System Factors could be applied to reduce ventilation fan airflow rates relative to ASHRAE Standard 62.2 to save energy and reduce moisture control risk in humid climates. HVAC energy savings were predicted to be 8-10%, or $50-$75/year.

  12. Application of CO{sub 2}-based demand-controlled ventilation using ASHRAE Standard 62: Optimizing energy use and ventilation

    SciTech Connect (OSTI)

    Schell, M.B. [Engelhard Sensor Technologies, Santa Barbara, CA (United States); Turner, S.; Shim, R.O. [Chelsea Group, Ltd., Delray Beach, FL (United States)

    1998-12-31T23:59:59.000Z

    CO{sub 2}-based demand-controlled ventilation (DCV), when properly applied in spaces where occupancies vary below design occupancy, can reduce unnecessary overventilation while implementing target per-person ventilation rates. A recent interpretation of ANSI/ASHRAE Standard 62-1989, Interpretation 1C 62-1989-27, has affirmed that carbon dioxide (CO{sub 2})-based demand-controlled ventilation (DCV) systems can use CO{sub 2} as an occupancy indicator to modulate ventilation below the maximum total outdoor air intake rate while still maintaining the required ventilation rate per person, provided that certain conditions are met. This paper, co-written by the author of the interpretation, provides guidelines on the application of CO{sub 2}-based DCV. In addition, a method is presented that allows reasonable estimates of the actual ventilation rate per person being effectively delivered to the space, based on comparing predicted CO{sub 2} ventilation levels with CO{sub 2} levels logged in an occupied space. Finally, a model is presented to evaluate various CO{sub 2}-based DCV strategies to predict their delivery of target per-person ventilation rates within the lag times required by the standard.

  13. Optimization of Occupancy Based Demand Controlled Ventilation in Residences

    SciTech Connect (OSTI)

    Mortensen, Dorthe K.; Walker, Iain S.; Sherman, Max H.

    2011-05-01T23:59:59.000Z

    Although it has been used for many years in commercial buildings, the application of demand controlled ventilation in residences is limited. In this study we used occupant exposure to pollutants integrated over time (referred to as 'dose') as the metric to evaluate the effectiveness and air quality implications of demand controlled ventilation in residences. We looked at air quality for two situations. The first is that typically used in ventilation standards: the exposure over a long term. The second is to look at peak exposures that are associated with time variations in ventilation rates and pollutant generation. The pollutant generation had two components: a background rate associated with the building materials and furnishings and a second component related to occupants. The demand controlled ventilation system operated at a low airflow rate when the residence was unoccupied and at a high airflow rate when occupied. We used analytical solutions to the continuity equation to determine the ventilation effectiveness and the long-term chronic dose and peak acute exposure for a representative range of occupancy periods, pollutant generation rates and airflow rates. The results of the study showed that we can optimize the demand controlled airflow rates to reduce the quantity of air used for ventilation without introducing problematic acute conditions.

  14. Recovery Act State Summaries | Department of Energy

    Energy Savers [EERE]

    Act State Memo Virgin Islands Recovery Act State Memo Washington Recovery Act State Memo West Virginia Recovery Act State Memo Wisconsin Recovery Act State Memo Wyoming Recovery...

  15. An empirical correlation between the enthalpy of solution of aqueous salts and their ability to form hydrates

    SciTech Connect (OSTI)

    Pandelov, S.; Werhahn, Jasper C.; Pilles, Bert M.; Xantheas, Sotiris S.; Iglev, H.

    2010-09-30T23:59:59.000Z

    The ability of aqueous salt solutions to form hydrates by cooling them at ambient pressure is probed by infrared (IR) spectroscopy by examining the structure of the spectra in the hydrogen-bonding region (3,000 - 3,800 cm-1). A collection of 75 organic and inorganic salts in saturated solutions are examined. We have found a correlation between the enthalpy of solution of the salt and its ability to form a hydrate, namely that the salt’s enthalpy of solution is lower than the standard enthalpy of fusion of ice (6 kJ/mol). This observation can serve as an empirical rule that determines whether a salt will form a hydrate upon cooling from its aqueous solution.

  16. Recovery News Flashes

    Broader source: Energy.gov (indexed) [DOE]

    SRS Recovery Act Prepares to Complete Shipment of More Than 5,000 Cubic Meters of Nuclear Waste to WIPP http:energy.govemdownloadstru-success-srs-recovery-act-prepares...

  17. Recovery Act Milestones

    ScienceCinema (OSTI)

    Rogers, Matt

    2013-05-29T23:59:59.000Z

    Every 100 days, the Department of Energy is held accountable for a progress report on the American Recovery and Reinvestment Act. Update at 200 days, hosted by Matt Rogers, Senior Advisor to Secretary Steven Chu for Recovery Act Implementation.

  18. Locating Heat Recovery Opportunities 

    E-Print Network [OSTI]

    Waterland, A. F.

    1981-01-01T23:59:59.000Z

    Basic concepts of heat recovery are defined as they apply to the industrial community. Methods for locating, ranking, and developing heat recovery opportunities are presented and explained. The needs for useful heat 'sinks' are emphasized as equal...

  19. Locating Heat Recovery Opportunities

    E-Print Network [OSTI]

    Waterland, A. F.

    1981-01-01T23:59:59.000Z

    Basic concepts of heat recovery are defined as they apply to the industrial community. Methods for locating, ranking, and developing heat recovery opportunities are presented and explained. The needs for useful heat 'sinks' are emphasized as equal...

  20. Author's personal copy Infaunal burrow ventilation and pore-water transport in muddy sediments

    E-Print Network [OSTI]

    Shull, David H.

    burrow ventilation activities of organisms. Burrow ventilation is modeled as a simple non-local exchangeAuthor's personal copy Infaunal burrow ventilation and pore-water transport in muddy sediments D: bioturbation bioirrigation biogeochemistry benthic ecology radon Boston Harbor a b s t r a c t The ventilation

  1. Cost effective combined axial fan and throttling valve control of ventilation rate

    E-Print Network [OSTI]

    Sengun, Mehmet Haluk

    Cost effective combined axial fan and throttling valve control of ventilation rate C.J. Taylor 1 P with Proportional-Integral-Plus (PIP) control of ventilation rate in mechanically ventilated agricultural buildings ventilation. The new combined fan/valve configuration is compared with a commercially available PID

  2. ENERGY ANALYSISF FOR WORKSHOPS WITH FLOOR-SUPPLY DISPLACEMENT VENTILATION UNDER THE U.S. CLIMATES

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 ENERGY ANALYSISF FOR WORKSHOPS WITH FLOOR-SUPPLY DISPLACEMENT VENTILATION UNDER THE U.S. CLIMATES ventilation systems are better than mixing ventilation systems. The benefits include indoor air quality. This research compared the energy use of a floor-supply displacement ventilation system in a large industrial

  3. Wireless Ventilation Control for Large-Scale Systems: the Mining Industrial Case

    E-Print Network [OSTI]

    Boyer, Edmond

    Wireless Ventilation Control for Large-Scale Systems: the Mining Industrial Case E. Witrant1,, A. D, for large scale systems with high environmental impact: the mining ventilation control systems. Ventilation). We propose a new model for underground ventilation. The main components of the system dynamics

  4. Ventilating Existing Homes in the US Air Infiltration Review. 2010;31(2)

    E-Print Network [OSTI]

    mechanical ventilation fan leads to reductions in other measures, such as adding insulation. This has led

  5. Text-Alternative Version of Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements

    Broader source: Energy.gov [DOE]

    Transcript of Building America webinar, "Multifamily Ventilation Strategies and Compartmentalization Requirements," held on Sept. 24, 2014.

  6. Transient blocking in multi-chamber natural ventilation M. R. Flynn and C. P. Caulfield

    E-Print Network [OSTI]

    Flynn, Morris R.

    , the system must evolve towards a ventilated terminal state in which there is outflow of buoyant fluid (inflowTransient blocking in multi-chamber natural ventilation M. R. Flynn and C. P. Caulfield Dept-energy `natural' ventilation offers an environmental benefit over building ventilation by high

  7. Particle transport in low-energy ventilation systems. Part 2: Transients and experiments

    E-Print Network [OSTI]

    Bolster, Diogo

    Particle transport in low-energy ventilation systems. Part 2: Transients and experiments- sumption is a must for efficient ventilation system design. In this work, we study the transport ventilated by low energy displacement-ventilation systems. With these results and the knowledge of typical

  8. Experimental Measurements and Numerical Simulations of Particle Transport and Distribution in Ventilated Rooms

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    was neglected, and particles were hence removed only by the ventilation system. Thus the particle removal performance of different ventilation systems can be evaluated. Three ventilation systems have been studied; Ventilation systems; Lagrangian particle tracking, CFD 1. Introduction Suspended particulate matter can serve

  9. Thermal dissociation behavior and dissociation enthalpies of methane-carbon dioxide mixed hydrates

    SciTech Connect (OSTI)

    Kwon, T.H.; Kneafsey, T.J.; Rees, E.V.L.

    2011-02-15T23:59:59.000Z

    Replacement of methane with carbon dioxide in hydrate has been proposed as a strategy for geologic sequestration of carbon dioxide (CO{sub 2}) and/or production of methane (CH{sub 4}) from natural hydrate deposits. This replacement strategy requires a better understanding of the thermodynamic characteristics of binary mixtures of CH{sub 4} and CO{sub 2} hydrate (CH{sub 4}-CO{sub 2} mixed hydrates), as well as thermophysical property changes during gas exchange. This study explores the thermal dissociation behavior and dissociation enthalpies of CH{sub 4}-CO{sub 2} mixed hydrates. We prepared CH{sub 4}-CO{sub 2} mixed hydrate samples from two different, well-defined gas mixtures. During thermal dissociation of a CH{sub 4}-CO{sub 2} mixed hydrate sample, gas samples from the head space were periodically collected and analyzed using gas chromatography. The changes in CH{sub 4}-CO{sub 2} compositions in both the vapor phase and hydrate phase during dissociation were estimated based on the gas chromatography measurements. It was found that the CO{sub 2} concentration in the vapor phase became richer during dissociation because the initial hydrate composition contained relatively more CO{sub 2} than the vapor phase. The composition change in the vapor phase during hydrate dissociation affected the dissociation pressure and temperature; the richer CO{sub 2} in the vapor phase led to a lower dissociation pressure. Furthermore, the increase in CO{sub 2} concentration in the vapor phase enriched the hydrate in CO{sub 2}. The dissociation enthalpy of the CH{sub 4}-CO{sub 2} mixed hydrate was computed by fitting the Clausius-Clapeyron equation to the pressure-temperature (PT) trace of a dissociation test. It was observed that the dissociation enthalpy of the CH{sub 4}-CO{sub 2} mixed hydrate lays between the limiting values of pure CH{sub 4} hydrate and CO{sub 2} hydrate, increasing with the CO{sub 2} fraction in the hydrate phase.

  10. Comparison of Two Ventilation Systems in a Chinese Commercial Kitchen

    E-Print Network [OSTI]

    Wan, X.; Yu, L.; Hou, H.

    2006-01-01T23:59:59.000Z

    A numerical simulation of an indoor thermal environment in a Chinese commercial kitchen has been carried out using indoor zero-equation turbulence model. Two different ventilation systems in a Chinese commercial kitchen have been simulated...

  11. Experiment on Residential Ventilation System In Actual House

    E-Print Network [OSTI]

    Tiecheng, L.

    2006-01-01T23:59:59.000Z

    Traced-gas was used in the experiment in order to evaluate the ventilation effect in different conditions in actual house. The influence of interior doors which opened or closed and vents position were considered in the experiment....

  12. Key Factors in Displacement Ventilation Systems for Better IAQ

    E-Print Network [OSTI]

    Wang, X.; Chen, J.; Li, Y.; Wang, Z.

    2006-01-01T23:59:59.000Z

    This paper sets up a mathematical model of three-dimensional steady turbulence heat transfer in an air-conditioned room of multi-polluting heat sources. Numerical simulation helps identify key factors in displacement ventilation systems that affect...

  13. Educational placements for children who are ventilator assisted

    E-Print Network [OSTI]

    Jones, David E.; Clatterburk, Chris C.; Marquis, Janet; Turnbull, H. Rutherford; Moberly, Rebecca L.

    1996-01-01T23:59:59.000Z

    Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Educational placements for children who are ventilator assisted Jones, David E;Clatterbuck, Chris C;Marquis, Janet;Turnbull, H Rutherford, III...

  14. Preconditioning Outside Air: Cooling Loads from Building Ventilation

    E-Print Network [OSTI]

    Kosar, D.

    1998-01-01T23:59:59.000Z

    HVAC equipment manufacturers, specifiers and end users interacting in the marketplace today are only beginning to address the series of issues promulgated by the increased outside air requirements in ASHRAE Standard 62- 1989, "Ventilation...

  15. Ventilation Effectiveness Research at UT-Typer Lab Houses

    Broader source: Energy.gov (indexed) [DOE]

    Ventilation Effectiveness Research at UT-Tyler Lab Houses Source Of Outside Air, Distribution, Filtration Armin Rudd Twin (almost) Lab Houses at UT-Tyler House 2: Unvented attic,...

  16. Commissioning Trial for Mechanical Ventilation System Installed in Houses

    E-Print Network [OSTI]

    Ohta, I.; Fukushima, A.

    2004-01-01T23:59:59.000Z

    , commissioning process should be introduced more often. REFERENCES (1) Roger Anneling, The P-mark system for prefabricated houses in Sweden, 1998, CADDET (2) Hirai et al, Comparison between results from ventilation network model calculation...

  17. Study of airflow and thermal stratification in naturally ventilated rooms

    E-Print Network [OSTI]

    Menchaca Brandan, María Alejandra

    2012-01-01T23:59:59.000Z

    Natural ventilation (NV) can considerably contribute to reducing the cooling energy consumption of a building and increase occupant productivity, if correctly implemented. Such energy savings depend on the number of hours ...

  18. active tracheal ventilation: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    S. MITCHELL, T. T. GLEESON, California 92717 MITCHELL, G. S., T. T. GLEESON, AND A. F. BENNETT. Ventilation and acid-base balance during (Vcoz) and 02 consumption (SOL?), and...

  19. Key Factors in Displacement Ventilation Systems for Better IAQ 

    E-Print Network [OSTI]

    Wang, X.; Chen, J.; Li, Y.; Wang, Z.

    2006-01-01T23:59:59.000Z

    This paper sets up a mathematical model of three-dimensional steady turbulence heat transfer in an air-conditioned room of multi-polluting heat sources. Numerical simulation helps identify key factors in displacement ventilation systems that affect...

  20. Natural ventilation possibilities for buildings in the United States

    E-Print Network [OSTI]

    Dean, Brian N. (Brian Nathan), 1974-

    2001-01-01T23:59:59.000Z

    In the United States, many of the commercial buildings built in the last few decades are completely mechanically air conditioned, without the capability to use natural ventilation. This habit has occurred in building designs ...

  1. Capture and Use of Coal Mine Ventilation Air Methane

    SciTech Connect (OSTI)

    Deborah Kosmack

    2008-10-31T23:59:59.000Z

    CONSOL Energy Inc., in conjunction with MEGTEC Systems, Inc., and the U.S. Department of Energy with the U.S. Environmental Protection Agency, designed, built, and operated a commercial-size thermal flow reversal reactor (TFRR) to evaluate its suitability to oxidize coal mine ventilation air methane (VAM). Coal mining, and particularly coal mine ventilation air, is a major source of anthropogenic methane emissions, a greenhouse gas. Ventilation air volumes are large and the concentration of methane in the ventilation air is low; thus making it difficult to use or abate these emissions. This test program was conducted with simulated coal mine VAM in advance of deploying the technology on active coal mine ventilation fans. The demonstration project team installed and operated a 30,000 cfm MEGTEC VOCSIDIZER oxidation system on an inactive coal mine in West Liberty, WV. The performance of the unit was monitored and evaluated during months of unmanned operation at mostly constant conditions. The operating and maintenance history and how it impacts the implementation of the technology on mine fans were investigated. Emission tests showed very low levels of all criteria pollutants at the stack. Parametric studies showed that the equipment can successfully operate at the design specification limits. The results verified the ability of the TFRR to oxidize {ge}95% of the low and variable concentration of methane in the ventilation air. This technology provides new opportunities to reduce greenhouse gas emissions by the reduction of methane emissions from coal mine ventilation air. A large commercial-size installation (180,000 cfm) on a single typical mine ventilation bleeder fan would reduce methane emissions by 11,000 to 22,100 short tons per year (the equivalent of 183,000 to 366,000 metric tonnes carbon dioxide).

  2. ENERGY IMPACTS OF VARIOUS RESIDENTIAL MECHANICAL VENTILATION STRATEGIES

    E-Print Network [OSTI]

    Vieira, R.; Parker, D.; Lixing, G.; Wichers, M.

    ENERGY IMPACTS OF VARIOUS RESIDENTIAL MECHANICAL VENTILATION STRATEGIES Robin K. Vieira, Buildings. Research Division Director Danny S. Parker Principal Research Scientist Lixing Gu Principal Research Engineer Michael Wichers... into the homes. Many of these strategies utilize the central air handler fan from the HVAC system to ventilate when the system runs. Controllers can be purchased to force the air to enter for minimum periods of time or to shut off outside air dampers after...

  3. Evaluation of pulmonary ventilation in horses during methoxyflurane anesthesia

    E-Print Network [OSTI]

    McDonald, Don Reed

    1976-01-01T23:59:59.000Z

    EVALUATION OF PULMONARY VENTILATION IN HORSES DURING METHOXYFLURANE ANESTHESIA A Thesis by DON REED McDONALD Submitted to the Graduate College of Texas A8M University in Partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE August 1976 Major Subject: Veterinary Medicine and Surgery EVALUATION OF PULMONARY VENTILATION IN HORSES DURING METHOXYFLURANE ANESTHESIA A Thesis by DON REED McDONALD Approved as to style and content by; Chairman o Committee Head...

  4. Design Alternative Evaluation No. 3: Post-Closure Ventilation

    SciTech Connect (OSTI)

    Logan, R.C.

    1999-06-22T23:59:59.000Z

    The objective of this study is to provide input to the Enhanced Design Alternatives (EDA) for License Application Design Selection (LADS). Its purpose is to develop and evaluate conceptual designs for post-closure ventilation alternatives that enhance repository performance. Post-closure ventilation is expected to enhance repository performance by limiting the amount of water contacting the waste packages. Limiting the amount of water contacting the waste packages will reduce corrosion.

  5. Air exchange effectiveness of conventional and task ventilation for offices

    SciTech Connect (OSTI)

    Fisk, W.J.; Faulkner, D.; Prill, R.J.

    1991-12-01T23:59:59.000Z

    Air quality and comfort complaints within large buildings are often attributed to air distribution problems. We define three air exchange effectiveness parameters related to air distribution. The first two indicate the indoor air flow pattern (i.e., the extent of short circuiting, mixing, or displacement flow) for an entire building or region. The third parameter is most useful for assessments of the spatial variability of ventilation. We also define the air diffusion effectiveness which indicates the air flow pattern within specific rooms or sections of buildings. The results of measurements of these parameters in US office buildings by the authors and other researchers are reviewed. Almost all measurements indicate very limited short circuiting or displacement flow between locations of air supply and removal. However, a moderate degree of short circuiting is evident from a few measurements in rooms with heated supply air. The results of laboratory-based measurements by the authors are consistent with the field data. Our measurements in office buildings do indicate that ventilation rates can vary substantially between indoor locations, probably due to variation in air supply rates between locations rather than variation in the indoor air flow patterns. One possible method of improving air distribution is to employ task ventilation with air supplied closer to the occupant`s breathing zone. We have evaluated two task ventilation systems in a laboratory setting. During most operating conditions, these systems did not provide a region of substantially increased ventilation where occupants breath. However, both systems are capable of providing substantially enhanced ventilation at the breathing zone under some operating conditions. Therefore, task ventilation is a potential option for using ventilation air more effectively.

  6. Air exchange effectiveness of conventional and task ventilation for offices

    SciTech Connect (OSTI)

    Fisk, W.J.; Faulkner, D.; Prill, R.J.

    1991-12-01T23:59:59.000Z

    Air quality and comfort complaints within large buildings are often attributed to air distribution problems. We define three air exchange effectiveness parameters related to air distribution. The first two indicate the indoor air flow pattern (i.e., the extent of short circuiting, mixing, or displacement flow) for an entire building or region. The third parameter is most useful for assessments of the spatial variability of ventilation. We also define the air diffusion effectiveness which indicates the air flow pattern within specific rooms or sections of buildings. The results of measurements of these parameters in US office buildings by the authors and other researchers are reviewed. Almost all measurements indicate very limited short circuiting or displacement flow between locations of air supply and removal. However, a moderate degree of short circuiting is evident from a few measurements in rooms with heated supply air. The results of laboratory-based measurements by the authors are consistent with the field data. Our measurements in office buildings do indicate that ventilation rates can vary substantially between indoor locations, probably due to variation in air supply rates between locations rather than variation in the indoor air flow patterns. One possible method of improving air distribution is to employ task ventilation with air supplied closer to the occupant's breathing zone. We have evaluated two task ventilation systems in a laboratory setting. During most operating conditions, these systems did not provide a region of substantially increased ventilation where occupants breath. However, both systems are capable of providing substantially enhanced ventilation at the breathing zone under some operating conditions. Therefore, task ventilation is a potential option for using ventilation air more effectively.

  7. Battleground Energy Recovery Project

    SciTech Connect (OSTI)

    Daniel Bullock

    2011-12-31T23:59:59.000Z

    In October 2009, the project partners began a 36-month effort to develop an innovative, commercial-scale demonstration project incorporating state-of-the-art waste heat recovery technology at Clean Harbors, Inc., a large hazardous waste incinerator site located in Deer Park, Texas. With financial support provided by the U.S. Department of Energy, the Battleground Energy Recovery Project was launched to advance waste heat recovery solutions into the hazardous waste incineration market, an area that has seen little adoption of heat recovery in the United States. The goal of the project was to accelerate the use of energy-efficient, waste heat recovery technology as an alternative means to produce steam for industrial processes. The project had three main engineering and business objectives: Prove Feasibility of Waste Heat Recovery Technology at a Hazardous Waste Incinerator Complex; Provide Low-cost Steam to a Major Polypropylene Plant Using Waste Heat; and ï?· Create a Showcase Waste Heat Recovery Demonstration Project.

  8. New Air Cleaning Strategies for Reduced Commercial Building Ventilation Energy

    SciTech Connect (OSTI)

    Sidheswaran, Meera; Destaillats, Hugo; Sullivan, Douglas P.; Fisk, William J.

    2010-10-27T23:59:59.000Z

    Approximately ten percent of the energy consumed in U.S. commercial buildings is used by HVAC systems to condition outdoor ventilation air. Reducing ventilation rates would be a simple and broadly-applicable energy retrofit option, if practical counter measures were available that maintained acceptable concentrations of indoor-generated air pollutants. The two general categories of countermeasures are: 1) indoor pollutant source control, and 2) air cleaning. Although pollutant source control should be used to the degree possible, source control is complicated by the large number and changing nature of indoor pollutant sources. Particle air cleaning is already routinely applied in commercial buildings. Previous calculations indicate that particle filtration consumes only 10percent to 25percent of the energy that would otherwise be required to achieve an equivalent amount of particle removal with ventilation. If cost-effective air cleaning technologies for volatile organic compounds (VOCs) were also available, outdoor air ventilation rates could be reduced substantially and broadly in the commercial building stock to save energy. The research carried out in this project focuses on developing novel VOC air cleaning technologies needed to enable energy-saving reductions in ventilation rates. The minimum required VOC removal efficiency to counteract a 50percent reduction in ventilation rate for air cleaning systems installed in the HVAC supply airstream is modest (generally 20percent or less).

  9. Temperature Dependence of the Free Energy, Enthalpy, and Entropy of P+QA Recombination in Rhodobacter sphaeroides R-26 Reaction Centers

    E-Print Network [OSTI]

    Gunner, Marilyn

    Temperature Dependence of the Free Energy, Enthalpy, and Entropy of P+QA - Charge Recombination by this thermal pathway is proportional to the equilibrium constant between P+QA - and P+H-. Thus, the free energy dependence of the charge recombination kinetics. The free energy, entropy, and enthalpy changes between P

  10. MR-compatible ventilator for small animals: computer-controlled ventilation for proton and noble gas imaging

    E-Print Network [OSTI]

    of normal breathing gas or experimental test gases. 2. Materials and methods 2.1. Overview of the ventilator/timers control electro-mechanical relays (S2072 relay board, National Instruments Interface Board), which in turn

  11. Thermochemistry of Ethyl 3-Oxobutanoate Revisited: Observance of a Non-Zero Enthalpy of Mixing between Tautomers and Its Effects

    E-Print Network [OSTI]

    Chickos, James S.

    . Equation 1 was used for this purpose. The term Cp(l)m represents the heat capacity of the liquid that was estimated by group additivity.6 Since the heat capacity of the liquid enol-ester and keto-ester estimate The enthalpies of formation of pure liquid and gas-phase ethyl 3-oxobutanoate and ethyl Z-3-hydroxy- 2-butenoate

  12. A protocol for correcting experimental fusion enthalpies to 298.15 K and it's application in indirect measurements

    E-Print Network [OSTI]

    Chickos, James S.

    ) was derived by correlating differences between experimental heat capacities of the liquid and gas phases for a series of compounds with the heat capacity of each respective liquid phase at 298.15 K. The heat capacity for enthalpies measured from 200 to 500 K. # 1998 Elsevier Science B.V. Keywords: Heat capacity corrections

  13. International Journal of Ventilation ISSN 1473-3315 Volume 10 No1 June 2011 Optimization of Occupancy Based Demand Controlled Ventilation

    E-Print Network [OSTI]

    International Journal of Ventilation ISSN 1473-3315 Volume 10 No1 June 2011 ________________________________________________________________________________________________________________________ ________________________________________________________________________________________________________________________ 49 Optimization of Occupancy Based Demand Controlled Ventilation in Residences Dorthe K. Mortensen1, the application of demand controlled ventilation in residences is limited. In this study we used occupant exposure

  14. Temperature stratification and air change effectiveness in a high cooling load office with two heat source heights in a combined chilled ceiling and displacement ventilation system

    E-Print Network [OSTI]

    Schiavon, Stefano; Bauman, Fred; Tully, Brad; Rimmer, Julian

    2012-01-01T23:59:59.000Z

    and displacement ventilation system. Submitted to Energy andand displacement ventilation system. Submitted to Energy andand displacement ventilation systems, Energy Build. 34 (

  15. A study of time-dependent responses of a mechanical displacement ventilation (DV) system and an underfloor air distribution (UFAD) system : building energy performance of the UFAD system

    E-Print Network [OSTI]

    Yu, Jong Keun

    2010-01-01T23:59:59.000Z

    Displacement Ventilation system . . . . . . . . . . 1.1.2responses of mechanical Displacement Ventilation system 2.1of Displacement Ventilation Systems . Experi- mental and

  16. Indoor Air Quality and Ventilation in Residential Deep Energy Retrofits

    SciTech Connect (OSTI)

    Less, Brennan; Walker, Iain

    2014-06-01T23:59:59.000Z

    Because airtightening is a significant part of Deep Energy Retrofits (DERs), concerns about ventilation and Indoor Air Quality (IAQ) have emerged. To investigate this, ventilation and IAQ were assessed in 17 non-smoking California Deep Energy Retrofit homes. Inspections and surveys were used to assess household activities and ventilation systems. Pollutant sampling performed in 12 homes included six-day passive samples of nitrogen dioxide (NO2), formaldehyde and air exchange rate (AER); time-resolved data loggers were used to measure particle counts. Half of the homes provided continuous mechanical ventilation. Despite these homes being twice as airtight (3.0 and 7.6 ACH50, respectively), their median AER was indistinguishable from naturally vented homes (0.36 versus 0.37 hr--1). Numerous problems were found with ventilation systems; however, pollutant levels did not reach levels of concern in most homes. Ambient NO2 standards were exceeded in some gas cooking homes that used legacy ranges with standing pilots, and in Passive House-style homes without range hoods exhausted to outside. Cooking exhaust systems were installed and used inconsistently. The majority of homes reported using low-emitting materials, and formaldehyde levels were approximately half those in conventional new CA homes (19.7 versus 36 ?g/m3), with emissions rates nearly 40percent less (12.3 versus 20.6 ?g/m2/hr.). Presence of air filtration systems led to lower indoor particle number concentrations (PN>0.5: 8.80E+06 PN/m3 versus 2.99E+06; PN>2.5: 5.46E+0.5 PN/m3 versus 2.59E+05). The results indicate that DERs can provide adequate ventilation and IAQ, and that DERs should prioritize source control, particle filtration and well-designed local exhaust systems, while still providing adequate continuous ventilation.

  17. Recovery Act Project Stories

    Broader source: Energy.gov [DOE]

    Funded by the American Recovery and Reinvestment Act, these Federal Energy Management Program (FEMP) projects exemplify the range of technical assistance provided to federal agencies.

  18. Waste Heat Recovery

    Office of Environmental Management (EM)

    DRAFT - PRE-DECISIONAL - DRAFT 1 Waste Heat Recovery 1 Technology Assessment 2 Contents 3 1. Introduction to the TechnologySystem ......

  19. Small Business Administration Recovery Act Implementation | Department...

    Broader source: Energy.gov (indexed) [DOE]

    Small Business Administration Recovery Act Implementation Small Business Administration Recovery Act Implementation Small Business Administration Recovery Act Implementation Small...

  20. Ventilation Behavior and Household Characteristics in NewCalifornia Houses

    SciTech Connect (OSTI)

    Price, Phillip N.; Sherman, Max H.

    2006-02-01T23:59:59.000Z

    A survey was conducted to determine occupant use of windows and mechanical ventilation devices; barriers that inhibit their use; satisfaction with indoor air quality (IAQ); and the relationship between these factors. A questionnaire was mailed to a stratified random sample of 4,972 single-family detached homes built in 2003, and 1,448 responses were received. A convenience sample of 230 houses known to have mechanical ventilation systems resulted in another 67 completed interviews. Some results are: (1) Many houses are under-ventilated: depending on season, only 10-50% of houses meet the standard recommendation of 0.35 air changes per hour. (2) Local exhaust fans are under-utilized. For instance, about 30% of households rarely or never use their bathroom fan. (3) More than 95% of households report that indoor air quality is ''very'' or ''somewhat'' acceptable, although about 1/3 of households also report dustiness, dry air, or stagnant or humid air. (4) Except households where people cook several hours per week, there is no evidence that households with significant indoor pollutant sources get more ventilation. (5) Except households containing asthmatics, there is no evidence that health issues motivate ventilation behavior. (6) Security and energy saving are the two main reasons people close windows or keep them closed.

  1. The CPA Equation of State and an Activity Coefficient Model for Accurate Molar Enthalpy Calculations of Mixtures with Carbon Dioxide and Water/Brine

    E-Print Network [OSTI]

    P. C. Myint; Y. Hao; A. Firoozabadi

    2015-04-20T23:59:59.000Z

    Thermodynamic property calculations of mixtures containing carbon dioxide (CO$_2$) and water, including brines, are essential in theoretical models of many natural and industrial processes. The properties of greatest practical interest are density, solubility, and enthalpy. Many models for density and solubility calculations have been presented in the literature, but there exists only one study, by Spycher and Pruess, that has compared theoretical molar enthalpy predictions with experimental data. In this report, we recommend two different models for enthalpy calculations: the CPA equation of state by Li and Firoozabadi, and the CO$_2$ activity coefficient model by Duan and Sun. We show that the CPA equation of state, which has been demonstrated to provide good agreement with density and solubility data, also accurately calculates molar enthalpies of pure CO$_2$, pure water, and both CO$_2$-rich and aqueous (H$_2$O-rich) mixtures of the two species. It is applicable to a wider range of conditions than the Spycher and Pruess model. In aqueous sodium chloride (NaCl) mixtures, we show that Duan and Sun's model yields accurate results for the partial molar enthalpy of CO$_2$. It can be combined with another model for the brine enthalpy to calculate the molar enthalpy of H$_2$O-CO$_2$-NaCl mixtures. We conclude by explaining how the CPA equation of state may be modified to further improve agreement with experiments. This generalized CPA is the basis of our future work on this topic.

  2. HOSPITAL VENTILATION STANDARDS AND ENERGY CONSERVATION: A SUMMARY OF THE LITERATURE WITH CONCLUSIONS AND RECOMMENDATIONS, FY 78 FINAL REPORT

    E-Print Network [OSTI]

    DeRoos, R.L.

    2011-01-01T23:59:59.000Z

    ALLANDER, C. and E. ABEL. Ventilation in the hospital. Sj~kh1955. BLOWERS, R. et a1. Ventilation of operating theatres.Letter: Operating theatre ventilation. 1(655): 1053-l05 L f,

  3. Ventilation and Infiltration in High-Rise Apartment Buildings Richard C. Diamond, Helmut E. Feustel and Darryl J. Dickerhoff

    E-Print Network [OSTI]

    Diamond, Richard

    1 Ventilation and Infiltration in High-Rise Apartment Buildings Richard C. Diamond, Helmut E to characterize the ventilation rates for the individual apartments. Parametric simulations were performed flow simulations suggest that the ventilation to the individual units varies considerably

  4. Heating, Ventilating, and Air-Conditioning: Recent Advances in Diagnostics and Controls to Improve Air-Handling System Performance

    E-Print Network [OSTI]

    Wray, Craig P.

    2008-01-01T23:59:59.000Z

    step in designing a ventilation system is determining theto shut down the ventilation system for a period of timeperiod with the ventilation system off (e.g. , at least 6

  5. Enthalpy of mixing of liquid Ni-Zr and Cu-Ni-Zr alloys

    SciTech Connect (OSTI)

    Witusiewicz, V.T.; Sommer, F.

    2000-04-01T23:59:59.000Z

    Since the Al-Cu-Ni-Zr system is a basis for the production of bulk amorphous materials by rapid solidification techniques from the liquid state, it is of great scientific interest to determine the partial and the integral thermodynamic functions of liquid and undercooled liquid alloys. Such data, as was pointed out previously, are important in order to understand their extremely good glass-forming ability in multicomponent metallic systems as well as for processing improvements. In order to measure the thermodynamic properties of the Al-Cu-Ni-Zr quaternary, it is necessary to have reliable thermochemical data for its constituent canaries and ternaries first. In a series of articles, the authors have reported in detail the thermodynamic properties of liquid Al-Cu, Al-Ni, Cu-Ni, Cu-Zr, Al-Zr, Al-Cu-Ni, and Al-Cu-Zr alloys. This article deals with the direct calorimetric measurements of the partial and the integral enthalpies of mixing of liquid Ni-Zr and Cu-Ni-Zr alloys and the heat capacity of liquid Ni{sub 26}Zr{sub 74}. In a subsequent article, the authors will present similar data for the liquid ternary Al-Ni-Zr and for the liquid quaternary Al-Cu-Ni-Zr alloys.

  6. Black Hole Enthalpy and an Entropy Inequality for the Thermodynamic Volume

    E-Print Network [OSTI]

    Cvetic, M; Kubiznak, D; Pope, C N

    2010-01-01T23:59:59.000Z

    In a theory where the cosmological constant \\Lambda or the gauge coupling constant g arises as the vacuum expectation value, its variation should be included in the first law of thermodynamics for black holes. This becomes dE= TdS + \\Omega_i dJ_i + \\Phi_\\alpha d Q_\\alpha + \\Theta d \\Lambda, where E is now the enthalpy of the spacetime, and \\Theta, the thermodynamic conjugate of \\Lambda, is proportional to an effective volume V = -\\frac{16 \\pi \\Theta}{D-2} "inside the event horizon." Here we calculate \\Theta and V for a wide variety of D-dimensional charged rotating asymptotically AdS black hole spacetimes, using the first law or the Smarr relation. We compare our expressions with those obtained by implementing a suggestion of Kastor, Ray and Traschen, involving Komar integrals and Killing potentials, which we construct from conformal Killing-Yano tensors. We conjecture that the volume V and the horizon area A satisfy the inequality R\\equiv ((D-1)V/{\\cal A}_{D-2})^{1/(D-1)}\\, ({\\cal A}_{D-2}/A)^{1/(D-2)}\\ge1, ...

  7. Win-CC Control Extension Development: Pressure-Enthalpy Win-CC Panel

    E-Print Network [OSTI]

    Gaona, Daniel

    2013-01-01T23:59:59.000Z

    This report reviews in detail the development and implementation of a Win-CC Control Extension for both Windows and Linux Platforms. The Control Extension consists in a Win-CC panel linked by dynamic libraries (*.dll or *.so) to the NIST Thermodynamics properties library. This linking permits to handle in real time different thermodynamic properties of a wide range of refrigerants. The Win-CC panel uses this information to produce a Pressure-Enthalpy Diagram of any required refrigeration cycle. In general, the p-H diagram enhance the understanding of the refrigeration cycle and facilitate the control and supervision of the system. Ideally, this control extension will be part of several Cooling Projects at CERN such as ATLAS IBL and CMS TIF. The development of this tool required several weeks of programming in C++ in both Linux and Windows platforms. At the end, the tool was constructed successfully and tested in both operating systems. The following sections go deeper into the develop, operation, and impleme...

  8. Recovery Boiler Corrosion Chemistry

    E-Print Network [OSTI]

    Das, Suman

    11/13/2014 1 Recovery Boiler Corrosion Chemistry Sandy Sharp and Honghi Tran Symposium on Corrosion of a recovery boiler each cause their own forms of corrosion and cracking Understanding the origin of the corrosive conditions enables us to operate a boiler so as to minimize corrosion and cracking select

  9. Mass and Heat Recovery 

    E-Print Network [OSTI]

    Hindawai, S. M.

    2010-01-01T23:59:59.000Z

    In the last few years heat recovery was under spot and in air conditioning fields usually we use heat recovery by different types of heat exchangers. The heat exchanging between the exhaust air from the building with the fresh air to the building...

  10. Recovery Act Funds at Work

    Broader source: Energy.gov [DOE]

    Funds from the American Recovery and Reinvestment Act of 2009 (Recovery Act) are being put to work to improve safety, reliability, and service in systems across the country. Here are case studies from a variety of Recovery Act programs.

  11. Water spray ventilator system for continuous mining machines

    DOE Patents [OSTI]

    Page, Steven J. (Pittsburgh, PA); Mal, Thomas (Pittsburgh, PA)

    1995-01-01T23:59:59.000Z

    The invention relates to a water spray ventilator system mounted on a continuous mining machine to streamline airflow and provide effective face ventilation of both respirable dust and methane in underground coal mines. This system has two side spray nozzles mounted one on each side of the mining machine and six spray nozzles disposed on a manifold mounted to the underside of the machine boom. The six spray nozzles are angularly and laterally oriented on the manifold so as to provide non-overlapping spray patterns along the length of the cutter drum.

  12. BUILDING VENTILATION AND INDOOR AIR QUALITY PROGRAM. CHAPTER FROM ENERGY AND ENVIRONMENT DIVISION ANNUAL REPORT 1978

    E-Print Network [OSTI]

    Cairns, Elton J.

    2011-01-01T23:59:59.000Z

    ventilation rates established by various state and localVentilation requirements are currently set by state and localventilation rates are specified in the various building codes adopted by state and local

  13. Beyond blue and red arrows : optimizing natural ventilation in large buildings

    E-Print Network [OSTI]

    Meguro, Wendy (Wendy Kei)

    2005-01-01T23:59:59.000Z

    Our growing understanding of technology and environment has expanded the complexities of producing large naturally ventilated buildings. While it may be argued that designing for natural ventilation is a straightforward, ...

  14. ASHRAE Standard 62.2. Ventilation and Acceptable Indoor Air Quality...

    Broader source: Energy.gov (indexed) [DOE]

    ensured dilution is dependent on an effective base standard for whole-house and spot ventilation. This is why the ASHRAE 62.2 residential ventilation standard is critical to...

  15. Analysis of the ventilation systems in the Dartford tunnels using a multiscale modelling approach 

    E-Print Network [OSTI]

    Colella, Francesco; Rein, Guillermo; Carvel, Ricky O; Reszka, Pedro; Torero, Jose L

    2010-01-01T23:59:59.000Z

    The capabilities of the ventilation systems in the two road tunnels at Dartford (London, UK) are analysed using a multi-scale modelling approach. Both tunnels have complex semi-transverse ventilation systems with jet fans to control longitudinal...

  16. Commissioning of a Coupled Earth Tube and Natural Ventilation System at the Design Phase

    E-Print Network [OSTI]

    Yoshida, H.; Pan, S.; Zheng, M.

    2007-01-01T23:59:59.000Z

    Natural ventilation airflow rate is generally calculated using indoor and outdoor temperature difference without consideration of thermal interaction between the ventilated air and the room in simple analytical method based on pressure balance...

  17. ASHRAE's Residential Ventilation Standard: Exegesis of Proposed Standard 62.2

    E-Print Network [OSTI]

    Sherman, M.

    2000-01-01T23:59:59.000Z

    In February 2000, ASHRAE's Standard Project Committee on "Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings", SPC 62.2P7 recommended ASHRAE's first complete standard on residential ventilation for public review...

  18. Internal Microclimate Resulting From Ventilated Attics in Hot and Humid Regions

    E-Print Network [OSTI]

    Mooney, B. L.; Porter, W. A.

    Ventilated spaces in the built environment create unique and beneficial microclimates. While the current trends in building physics suggest sealing attics and crawlspaces, comprehensive research still supports the benefits of the ventilated...

  19. Airflow Simulation and Energy Analysis in Ventilated Room with a New Type of Air Conditioning

    E-Print Network [OSTI]

    Liu, D.; Tang, G.; Zhao, F.

    2006-01-01T23:59:59.000Z

    Airflow simulation in one ventilated room with radiant heating and natural ventilation has been carried out. Three cases are compared: the closed room, the room with full openings, and the room with small openings. The radiator heating room...

  20. Analysis of Solar Passive Techniques and Natural Ventilation Concepts in a Residential Building Including CFD Simulation

    E-Print Network [OSTI]

    Quince, N.; Ordonez, A.; Bruno, J. C.; Coronas, A.

    2010-01-01T23:59:59.000Z

    step to increase energy performance in buildings is to use passive strategies, such as orientation, natural ventilation or envelope optimisation. This paper presents an analysis of solar passive techniques and natural ventilation concepts in a case...

  1. CO2 - Based Demand-Controlled Ventilation Control Strategies for Multi-Zone HVAC Systems

    E-Print Network [OSTI]

    Nassif, N.

    2011-01-01T23:59:59.000Z

    CO2-based demand-controlled ventilation DCV strategy offers a great opportunity to reduce energy consumption in HVAC systems while providing the required ventilation. However, implementing CO2-based DCV under ASHRAE 62.1.2004 through 2010...

  2. Evaluating the performance of natural ventilation in buildings through simulation and on-site monitoring

    E-Print Network [OSTI]

    Cheng, Haofan

    2013-01-01T23:59:59.000Z

    Natural ventilation in buildings is capable of reducing energy consumption while maintaining a comfortable indoor at the same time. It is important that natural ventilation is taken into consideration in the early design ...

  3. Design and prototyping of a low-cost portable mechanical ventilator

    E-Print Network [OSTI]

    Powelson, Stephen K. (Stephen Kirby)

    2010-01-01T23:59:59.000Z

    This paper describes the design and prototyping of a low-cost portable mechanical ventilator for use in mass casualty cases and resource-poor environments. The ventilator delivers breaths by compressing a conventional ...

  4. DECEMBER 24, 2011 through JANUARY 1, 2012 Heat/Ventilation Curtailment

    E-Print Network [OSTI]

    Walker, Matthew P.

    DECEMBER 24, 2011 through JANUARY 1, 2012 Heat/Ventilation Curtailment Request for Exception to Holiday Heat/Ventilation Curtailment Unit Requesting: Building: Contact Person: Specific Room(s): Address

  5. ASHRAE's Residential Ventilation Standard: Exegesis of Proposed Standard 62.2 

    E-Print Network [OSTI]

    Sherman, M.

    2000-01-01T23:59:59.000Z

    In February 2000, ASHRAE's Standard Project Committee on "Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings", SPC 62.2P7 recommended ASHRAE's first complete standard on residential ventilation ...

  6. Investigation of a radiantly heated and cooled office with an integrated desiccant ventilation unit 

    E-Print Network [OSTI]

    Gong, Xiangyang

    2009-05-15T23:59:59.000Z

    desiccant ventilation unit consumes 5.6% more primary energy than a single duct VAV system; it would consumes 11.4% less primary energy when the system is integrated with a presumed passive desiccant ventilation unit....

  7. Methodology for the evaluation of natural ventilation in buildings using a reduced-scale air model

    E-Print Network [OSTI]

    Walker, Christine E. (Christine Elaine)

    2006-01-01T23:59:59.000Z

    Commercial office buildings predominantly are designed to be ventilated and cooled using mechanical systems. In temperate climates, passive ventilation and cooling techniques can be utilized to reduce energy consumption ...

  8. Cleantech to Market Projects Spring 2011 1. Residential Ventilation Controller; PI -Iain Walker

    E-Print Network [OSTI]

    Kammen, Daniel M.

    Cleantech to Market Projects ­ Spring 2011 1. Residential Ventilation Controller; PI - Iain Walker As homes become more airtight optimizing for energy efficiency. Researchers have designed a smart ventilation system

  9. Waste Heat Recovery from High Temperature Off-Gases from Electric Arc Furnace

    SciTech Connect (OSTI)

    Nimbalkar, Sachin U [ORNL; Thekdi, Arvind [E3M Inc; Keiser, James R [ORNL; Storey, John Morse [ORNL

    2014-01-01T23:59:59.000Z

    This article presents a study and review of available waste heat in high temperature Electric Arc Furnace (EAF) off gases and heat recovery techniques/methods from these gases. It gives details of the quality and quantity of the sensible and chemical waste heat in typical EAF off gases, energy savings potential by recovering part of this heat, a comprehensive review of currently used waste heat recovery methods and potential for use of advanced designs to achieve a much higher level of heat recovery including scrap preheating, steam production and electric power generation. Based on our preliminary analysis, currently, for all electric arc furnaces used in the US steel industry, the energy savings potential is equivalent to approximately 31 trillion Btu per year or 32.7 peta Joules per year (approximately $182 million US dollars/year). This article describes the EAF off-gas enthalpy model developed at Oak Ridge National Laboratory (ORNL) to calculate available and recoverable heat energy for a given stream of exhaust gases coming out of one or multiple EAF furnaces. This Excel based model calculates sensible and chemical enthalpy of the EAF off-gases during tap to tap time accounting for variation in quantity and quality of off gases. The model can be used to estimate energy saved through scrap preheating and other possible uses such as steam generation and electric power generation using off gas waste heat. This article includes a review of the historical development of existing waste heat recovery methods, their operations, and advantages/limitations of these methods. This paper also describes a program to develop and test advanced concepts for scrap preheating, steam production and electricity generation through use of waste heat recovery from the chemical and sensible heat contained in the EAF off gases with addition of minimum amount of dilution or cooling air upstream of pollution control equipment such as bag houses.

  10. Comparison and verification of enthalpy schemes for polythermal glaciers and ice sheets with a one-dimensional model

    E-Print Network [OSTI]

    Blatter, Heinz

    2014-01-01T23:59:59.000Z

    The enthalpy method for the thermodynamics of polythermal glaciers and ice sheets is tested and verified by a one-dimensional problem (parallel-sided slab). The enthalpy method alone does not include explicitly the Stefan-type energy- and mass-flux matching conditions at the cold-temperate transition surface (CTS) that separates the upper cold from the lower temperate layer. However, these transition conditions are important for correctly determining the position of the CTS. For the numerical solution of the polythermal slab problem, we consider a two-layer front-tracking scheme as well as three different one-layer schemes that feature a single grid for both layers. Computed steady-state temperature and moisture profiles are verified with exact solutions, and transient solutions computed by the one-layer schemes are compared with those of the two-layer scheme, considered to be a reliable reference. While the conventional one-layer enthalpy scheme (that does not include the transition conditions at the CTS) ca...

  11. Recovery Act State Memos Kentucky

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    * KENTUCKY RECOVERY ACT SNAPSHOT Kentucky has substantial natural resources, including coal, oil, gas, and hydroelectric power. The American Recovery & Reinvestment Act (ARRA)...

  12. Modelica Library for Building Heating, Ventilation and Air-Conditioning Systems

    E-Print Network [OSTI]

    Wetter, Michael

    2010-01-01T23:59:59.000Z

    to a strati?ed thermal energy storage Figure 5: Model ofsystem with thermal energy storage. (to model ventilation

  13. Particle Concentration Dynamics in the Ventilation Duct after an Artificial Release: for Countering Potential Bioterriorist Attack

    E-Print Network [OSTI]

    You , Siming; Wan, Man Pun

    2014-01-01T23:59:59.000Z

    leads to In this work, the models of particle concentration dynamics in the ventilation duct following a resuspension

  14. Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements- Sean Maxwell

    Broader source: Energy.gov [DOE]

    This presentation is included in the Building America webinar, Multifamily Ventilation Strategies and Compartmentalization Requirements, on September 24, 2014.

  15. Direct ventilation of the North Pacific did not reach the deep ocean during the last deglaciation

    E-Print Network [OSTI]

    Long, Bernard

    Pacific core sites between 2710 and 3640 m, are incon- sistent with local ventilation of the lower halfDirect ventilation of the North Pacific did not reach the deep ocean during the last deglaciation S ventilated by dense waters formed in the subarctic Pacific during Heinrich Stadial 1 (HS1) of the early

  16. Premium Ventilation Package Testing Short-Term Monitoring Report Task 7

    E-Print Network [OSTI]

    Premium Ventilation Package Testing Short-Term Monitoring Report ­ Task 7 Review Draft Submittal. 00038702 RTU AirCarePlus & Premium Ventilation Program COTR - Jack Callahan (503) 230-4496 / jmcallahan Ventilation Package Testing PECI Short-Term Monitoring Report ­ Task 7 REVIEW DRAFT: 9/14/2009 2 Table

  17. Mechanical Ventilation Jairo I. Santanilla, MDa,b,*, Brian Daniel, RRTc

    E-Print Network [OSTI]

    Mechanical Ventilation Jairo I. Santanilla, MDa,b,*, Brian Daniel, RRTc , Mei-Ean Yeow, MDa leads to a delay in transfer and ventilator management falls upon the emergency medicine (EM) physician to troubleshoot or stabilize mechanically ventilated patients in the ICU. This article reviews the common modes

  18. Are the tunnel ventilation systems adapted for the different risk situations?

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Are the tunnel ventilation systems adapted for the different risk situations? B. TRUCHOT * INERIS Tunnels, France ABSTRACT The ventilation design criteria for both road and rail tunnel is based of such an approach is that it considers only the impact on the safety ventilation of the smoke propagation

  19. Ventilation of the Miocene Arctic Ocean: An idealized model study Bijoy Thompson,1

    E-Print Network [OSTI]

    Nycander, Jonas

    Ventilation of the Miocene Arctic Ocean: An idealized model study Bijoy Thompson,1 Johan Nilsson,2 the early Miocene, a feature presumably related to the opening of the Fram Strait. Here, the ventilation circulation model that includes a passive age tracer. In particular, we investigate how the ventilation

  20. Ventilation Requirements in Hot Humid Iain S. Walker and Max H. Sherman

    E-Print Network [OSTI]

    LBNL-59889 Ventilation Requirements in Hot Humid Climates Iain S. Walker and Max H. Sherman residential ventilation standard, ASHRAE Standard 62.2. Meeting this standard in new construction requires the use of mechanical ventilation, which in turn can often significantly increase the latent load faced

  1. Georgia Institute of Technology Ventilation System Testing Effective Date 04/01/02

    E-Print Network [OSTI]

    Georgia Institute of Technology Ventilation System Testing Effective Date 04/01/02 Revised 05 for measuring ventilation system performance. 2. Sash Positions a. Vertical rising sashes will be surveyed traverse measurements will be performed per the procedures described in Industrial Ventilation. b. Static

  2. Submitted to Building and Environment ON ESTIMATION OF MULTIZONE VENTILATION RATES

    E-Print Network [OSTI]

    LBL-25772 Submitted to Building and Environment ON ESTIMATION OF MULTIZONE VENTILATION RATES FROM techniques are becoming widely used to measure the ventilation rates in buildings. As more detailed describes tech- niques for improving tracer-gas derived ventilation data using physical knowledge about

  3. Floor-Supply Displacement Ventilation in a Small Office Nobukazu Kobayashi

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Floor-Supply Displacement Ventilation in a Small Office Nobukazu Kobayashi Building Technology Displacement ventilation . Computational fluid dynamics . Experimental measurements . Floor supply . Indoor air ventilation system using computational-fluid-dynamics (CFD). The experiment was carried out in a full

  4. Mechanical Ventilation for Imaging the Small Animal Lung Laurence W. Hedlund and G. Allan Johnson

    E-Print Network [OSTI]

    Mechanical Ventilation for Imaging the Small Animal Lung Laurence W. Hedlund and G. Allan Johnson lung. Because me- chanical ventilation plays a key role in high-quality, high- resolution imaging of the small animal lung, the article focuses particularly on the problems of ventilation support, control

  5. The ventilation of near-bottom shelf waters in the North-Western Black Sea

    E-Print Network [OSTI]

    Shapiro, Georgy

    The ventilation of near-bottom shelf waters in the North-Western Black Sea Georgy Shapiro, Fred of these areas to be ventilated by horizontal ex- changes during that period is assessed by a long-term time however be ventilated horizontally with deep-sea waters through isopycnal exchanges across the shelf break

  6. Ventilation and Air Quality in Indoor Ice Skating Arenas Chunxin Yang, Ph.D.1

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    Ventilation and Air Quality in Indoor Ice Skating Arenas Chunxin Yang, Ph.D.1 Philip Demokritou, and the operation strategy of the ventilation system are significant contributing factors to the indoor air quality exchange rate, air distribution method, and ventilation control strategies on the IAQ in an arena. With CFD

  7. A New Empirical Model for Predicting Single-Sided, Wind-Driven Natural Ventilation in Buildings

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    A New Empirical Model for Predicting Single-Sided, Wind-Driven Natural Ventilation in Buildings-sided natural ventilation is difficult due to the bi-directional flow at the opening and the complex flow around buildings. A new empirical model was developed that can predict the mean ventilation rate and fluctuating

  8. Changes in the Ventilation of the Oxygen Minimum Zone of the Tropical North Atlantic

    E-Print Network [OSTI]

    Changes in the Ventilation of the Oxygen Minimum Zone of the Tropical North Atlantic PETER BRANDT) ABSTRACT Changes in the ventilation of the oxygen minimum zone (OMZ) of the tropical North Atlantic centimeters per second in the depth range of the OMZ contribute to the ventilation of the OMZ. A conceptual

  9. Ventilation and acid-base balance during graded activity in lizards

    E-Print Network [OSTI]

    Bennett, Albert F.

    Ventilation and acid-base balance during graded activity in lizards G. S. MITCHELL, T. T. GLEESON, California 92717 MITCHELL, G. S., T. T. GLEESON, AND A. F. BENNETT. Ventilation and acid-base balance during (Vcoz) and 02 consumption (SOL?), and effective alveolar ventilation (Veff) were determined

  10. A case study of boundary layer ventilation by convection and coastal processes

    E-Print Network [OSTI]

    Dacre, Helen

    A case study of boundary layer ventilation by convection and coastal processes H. F. Dacre,1 S. L; published 12 September 2007. [1] It is often assumed that ventilation of the atmospheric boundary layer responsible for ventilation of the atmospheric boundary layer during a nonfrontal day that occurred on 9 May

  11. Buccal oscillation and lung ventilation in a semi-aquatic turtle, Platysternon megacephalum

    E-Print Network [OSTI]

    Brainerd, Elizabeth

    Buccal oscillation and lung ventilation in a semi-aquatic turtle, Platysternon megacephalum Kelly A including feeding, lung ventilation, buccopharyngeal respiration, thermoregulation, olfaction, defense of these buccal oscillations is 7.8 times smaller than the mean tidal volume of lung ventilation (combined mean

  12. Lobe-based Estimating Ventilation and Perfusion from 3D CT scans of the Lungs

    E-Print Network [OSTI]

    Warren, Joe

    Lobe-based Estimating Ventilation and Perfusion from 3D CT scans of the Lungs Travis McPhail Joe are the ventilation (air flow) and perfusion (blood flow) in the patient's lungs. Given the flow of air and blood as possible. The current state of the art technology for assessing the ventilation in a patient's lungs

  13. A multicenter randomized trial of computer-driven protocolized weaning from mechanical ventilation

    E-Print Network [OSTI]

    Dojat, Michel

    A multicenter randomized trial of computer-driven protocolized weaning from mechanical ventilation; Fax: 33 1 42 07 99 43 E-mail: laurent.brochard@hmn.aphp.fr Descriptor: 6. Mechanical ventilation Copyright (C) 2006 by the American Thoracic Society. #12;Running title: Automated ventilation Word count

  14. A simplified approach to describe complex diffusers in displacement ventilation for CFD simulations

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    A simplified approach to describe complex diffusers in displacement ventilation for CFD simulations to improve indoor air quality while simultaneously reduce energy demand, displacement ventilation is becom ent ventilation usin g com putational fluid dynamics (CFD) is challenging due to the com plexity

  15. Ventilation performance prediction for buildings: A method overview and recent applications

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Ventilation performance prediction for buildings: A method overview and recent applications This paper presented an overview of the tools used to predict ventilation performance in buildings. The tools ventilation performance in an entire building. The zonal models had limited applications and could be replaced

  16. Copyright 2006 Mosby, Inc., an affiliate of Elsevier Inc. Pilbeam: Mechanical Ventilation, 4th

    E-Print Network [OSTI]

    Kay, Mark A.

    Copyright © 2006 Mosby, Inc., an affiliate of Elsevier Inc. Pilbeam: Mechanical Ventilation, 4th Edition Special Techniques in Mechanical Ventilation SECTION IV: Nitric Oxide OUTLINE PROPERTIES SYSTEMS FOR DELIVERING INHALED NO I-NOvent Delivery System Continuous-Flow Ventilator System Premixed

  17. An ASAE/CSAE Meeting Presentation Paper Number: 044177 Comparison of Direct vs. Indirect Ventilation Rate

    E-Print Network [OSTI]

    Kentucky, University of

    Ventilation Rate Determination for Manure Belt Laying Hen Houses Hong Li Hongwei Xin Yi Liang Graduate. Direct measurement of ventilation rate in livestock housing can be a formidable task due a potentially viable, more flexible alternative to estimating ventilation rate. The reliability of CO2 balance

  18. Design analysis of single-sided natural ventilation Camille Allocca1

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Design analysis of single-sided natural ventilation Camille Allocca1 , Qingyan Chen2,* , and Leon Purdue Mall, West Lafayette, IN 47907-2040, USA Abstract Natural ventilation is an effective measure-sided natural ventilation by using a computational fluid dynamics (CFD) model, together with analytical

  19. Lung ventilation in vertebrates is accomplished by diverse respiratory pump mechanisms. Amniotes use an aspiration

    E-Print Network [OSTI]

    Brainerd, Elizabeth

    Lung ventilation in vertebrates is accomplished by diverse respiratory pump mechanisms. Amniotes primitive body form, and a recent study of lung ventilation in Necturus maculosus has suggested that studies). The mechanism of lung ventilation in N. maculosus is similar to the buccal pump used by lepidosirenid lungfishes

  20. COMBINED EFFECT OF WHITENING AND VENTILATION METHODS ON MICROCLIMATE AND TRANSPIRATION IN ROSE GREENHOUSE

    E-Print Network [OSTI]

    Lieth, J. Heinrich

    COMBINED EFFECT OF WHITENING AND VENTILATION METHODS ON MICROCLIMATE AND TRANSPIRATION IN ROSE, University of California, Davis 95616, CA, USA Abstract In this communication the effect of roof ventilation, roof & side ventilation (opening angle 15o and 45o ) and fan-pad cooling methods on transient response

  1. Does Mixing Make Residential Ventilation More Effective? Max Sherman, Iain Walker

    E-Print Network [OSTI]

    Does Mixing Make Residential Ventilation More Effective? Max Sherman, Iain Walker Environmental thereof or the Regents of the University of California. #12;Does Mixing Make Residential Ventilation More Effective? Max Sherman and Iain Walker, Lawrence Berkeley Lab ABSTRACT Ventilation dilutes or removes indoor

  2. Simulating Natural Ventilation in and Around Buildings by Fast Fluid Mingang Jin1

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Simulating Natural Ventilation in and Around Buildings by Fast Fluid Dynamics Mingang Jin1-765-496-7562 Fax: +1-765-494-0539 ABSTRACT Natural ventilation is a sustainable technology that can provide a well-built environment and also save energy. The application of natural ventilation to buildings requires a careful

  3. Midlevel Ventilation's Constraint on Tropical Cyclone Intensity BRIAN TANG AND KERRY EMANUEL

    E-Print Network [OSTI]

    Emanuel, Kerry A.

    Midlevel Ventilation's Constraint on Tropical Cyclone Intensity BRIAN TANG AND KERRY EMANUEL ventilation, or the flux of low-entropy air into the inner core of a tropical cyclone (TC), is a hy to assess how ventilation affects tropical cyclone intensity via two possible pathways: the first through

  4. owi'3:%l OORNL/CON-75 Effect of Forced Ventilation on

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    owi'3:%l OORNL/CON-75 Effect of Forced Ventilation on House Infiltration *CARBIDE W. P. Levins #12-eng-26 Energy Division EFFECT OF FORCED VENTILATION ON HOUSE INFILTRATION W. P. Levins DEPARTMENT 1980). v #12;EFFECT OF FORCED VENTILATION OF HOUSE INFILTRATION W. P. Levins Energy Division ABSTRACT

  5. Changes in the ventilation of the southern oceans Journal: Philosophical Transactions A

    E-Print Network [OSTI]

    Waugh, Darryn W.

    ForReview Only Changes in the ventilation of the southern oceans Journal: Philosophical=_new>here to find the code for your issue.: TM0713 Subject: Oceanography ventilation. A - Issue #12;ForReview Only Changes in the ventilation of the southern oceans Darryn W. Waugh1 Department

  6. Ventilation performance prediction for buildings: Model Assessment Qingyan Chena,b,*

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Ventilation performance prediction for buildings: Model Assessment Qingyan Chena,b,* , Kisup Leeb ventilation systems for buildings requires a suitable tool to assess the system performance-scale experimental, multizone network, zonal, and CFD) for predicting ventilation performance in buildings, which can

  7. Study of natural ventilation in buildings by large eddy simulation Yi Jiang and Qingyan Chen*

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Study of natural ventilation in buildings by large eddy simulation Yi Jiang and Qingyan Chen 02139 *Phone: (617) 253-7714, Fax: (617) 253-6152, Email: qchen@mit.edu Abstract Natural ventilation in the mechanical ventilation systems. Two subgrid-scale models of large eddy simulation (LES), a Smagorinsky

  8. Modelica Library for Building Heating, Ventilation and Air-Conditioning Systems

    E-Print Network [OSTI]

    Modelica Library for Building Heating, Ventilation and Air-Conditioning Systems Michael Wetter available Modelica library for building heating, ventilation and air conditioning systems. The library development is focused on the develop- ment of models for building heating, ventilation and air

  9. Particle transport in low-energy ventilation systems. Part 1: theory of steady states

    E-Print Network [OSTI]

    Bolster, Diogo

    , such as that pro- vided by a conventional overhead heating, ventilating and air-conditioning system, is mixingParticle transport in low-energy ventilation systems. Part 1: theory of steady states Introduction of this energy is spent on ventilation of buildings with summer time cooling account for almost 10% of the US

  10. PIERS ONLINE, VOL. 5, NO. 7, 2009 637 Ventilation Efficiency and Carbon Dioxide (CO2) Concentration

    E-Print Network [OSTI]

    Halgamuge, Malka N.

    inadequate ventilation. The American Society of Heating,Refrigerating and Air Conditioning Engineers (ASHRAEPIERS ONLINE, VOL. 5, NO. 7, 2009 637 Ventilation Efficiency and Carbon Dioxide (CO2) Concentration is approximately 400 parts per million. In this study, we investigate the relationship between ventilation

  11. Numerical Comparison of Ventilation Strategies Performance in a Single-family Dwelling

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -family house and its ventilation systems are simulated using SIMBAD Toolbox, a combined mass and heat transfer ventilation systems for a heating period. This paper deals with the simulation results with regard to indoor system, is about 22 to 31% depending on the efficiency of the heat exchanger. Balanced ventilation also

  12. A web based CBR system for heating ventilation and air conditioning systems sales support

    E-Print Network [OSTI]

    Watson, Ian

    A web based CBR system for heating ventilation and air conditioning systems sales support D describes the implementation of a case-based reasoning (CBR) system to support heating ventilation and air. Introduction Western Air is a distributor of heating ventilation and air conditioning (HVAC) systems

  13. UC Berkeley Heat/Ventilation Curtailment Period DECEMBER 24, 2011 through JANUARY 1, 2012

    E-Print Network [OSTI]

    California at Irvine, University of

    UC Berkeley Heat/Ventilation Curtailment Period DECEMBER 24, 2011 through JANUARY 1, 2012 Each year and January 1, 2012 in order to conserve energy, most campus buildings will be closed and heat and ventilation://hrweb.berkeley.edu/ for more information. Barrows Hall BUILDINGS SCHEDULED TO BE WITHOUT HEAT/VENTILATION Bechtel Engineering

  14. Natural Ventilation in Buildings: Measurement in a Wind Tunnel and Numerical Simulation with Large Eddy Simulation

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    save energy consumed by the heating, ventilating, and air- conditioning systems in a building1 Natural Ventilation in Buildings: Measurement in a Wind Tunnel and Numerical Simulation@purdue.edu Abstract Natural ventilation in buildings can create a comfortable and healthy indoor environment, and can

  15. Simulation of wind driven ventilative cooling systems for an apartment building in Beijing and Shanghai

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    1 Simulation of wind driven ventilative cooling systems for an apartment building in Beijing., Glicksman, L.R. and Norford, L.K. 2002. "Simulation of wind driven ventilative cooling systems evaluation of two passive cooling strategies, daytime ventilation and night cooling, for a generic, six

  16. Air flow and particle control with different ventilation systems in a classroom

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    Air flow and particle control with different ventilation systems in a classroom Sture Holmberg, Ph@mit.edu Phone: +1-617-253-7714, Fax: +1-617-2536152 Abstract Most ventilation and air conditioning systems. For displacement ventilation systems, designers normally assume that all pollutants follow the buoyant air flow

  17. Diagnostics and Measurements of Infiltration and Ventilation Systems in High-Rise Apartment Buildings

    E-Print Network [OSTI]

    Diamond, Richard

    Diagnostics and Measurements of Infiltration and Ventilation Systems in High-Rise Apartment without compromising air quality? We have been studying the air flows and ventilation systems in high systems that are neither efficient nor deliver satisfactory ventilation. Frequent problems include

  18. Experimental Study on Displacement and Mixing Ventilation Systems for a Patient Ward

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    Experimental Study on Displacement and Mixing Ventilation Systems for a Patient Ward Yonggao Yin., 2004). Thus, ventilation systems in hospital wards should be improved to control airborne infectious. (2008) conducted a review on designing ventilation systems for hospital wards and other multibed rooms

  19. Controllability and invariance of monotone systems for robust ventilation automation in buildings

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Controllability and invariance of monotone systems for robust ventilation automation in buildings [2] and control [3] of Heating, Ventilating and Air Conditioning (HVAC) systems leads to an improved comfort for the users and a reduction of energy consumption. Compared to traditional ceiling ventilation

  20. Usability Heuristics and Qualitative Indicators for the Usability Evaluation of Touch Screen Ventilator Systems

    E-Print Network [OSTI]

    Boyer, Edmond

    Ventilator Systems Dinesh Katre1, Ganesh Bhutkar2 , Shekhar Karmarkar3 1 Group Coordinator, Human complexity in the user interface, features and functionalities of ventilator systems can cause medical errors and cost the life of a patient. Therefore, the usability of ventilator systems is most crucial to ensure

  1. `Individual Ventilated Caging System' & `Animal Cage Changing Station' Page 1 NATIONAL INSTITUTE OF IMMUNOLOGY

    E-Print Network [OSTI]

    Bhalla, Upinder S.

    `Individual Ventilated Caging System' & `Animal Cage Changing Station' Page 1 NATIONAL INSTITUTE: (1) `Individual Ventilated Caging System' & (2) `Animal Cage Changing Station' Director, NII ­ New Document (Rs) 1 Individual Ventilated Caging System (Annexure-A) Air Handling Unit = 15 Nos. Animal

  2. On the role of mesoscale eddies in the ventilation of Antarctic intermediate water

    E-Print Network [OSTI]

    Fischlin, Andreas

    On the role of mesoscale eddies in the ventilation of Antarctic intermediate water Zouhair Lachkar Mesoscale eddies CFC-11 Ventilation Southern Ocean a b s t r a c t The spatial distribution of Antarctic and ventilation are substantially affected by mesoscale eddies. To diagnose the role of eddies, we made global CFC

  3. Data-driven classification of ventilated lung tissues using electrical impedance tomography

    E-Print Network [OSTI]

    Adler, Andy

    Data-driven classification of ventilated lung tissues using electrical impedance tomography Camille for identifying ventilated lung regions utilizing electrical impedance tomography (EIT) images rely on dividing of a data-driven classification method to identify ventilated lung ROI based on forming k clusters from

  4. Solvent recycle/recovery

    SciTech Connect (OSTI)

    Paffhausen, M.W.; Smith, D.L.; Ugaki, S.N.

    1990-09-01T23:59:59.000Z

    This report describes Phase I of the Solvent Recycle/Recovery Task of the DOE Chlorinated Solvent Substitution Program for the US Air Force by the Idaho National Engineering Laboratory, EG G Idaho, Inc., through the US Department of Energy, Idaho Operations Office. The purpose of the task is to identify and test recovery and recycling technologies for proposed substitution solvents identified by the Biodegradable Solvent Substitution Program and the Alternative Solvents/Technologies for Paint Stripping Program with the overall objective of minimizing hazardous wastes. A literature search to identify recycle/recovery technologies and initial distillation studies has been conducted. 4 refs.

  5. The CPA Equation of State and an Activity Coefficient Model for Accurate Molar Enthalpy Calculations of Mixtures with Carbon Dioxide and Water/Brine

    E-Print Network [OSTI]

    Myint, P C; Firoozabadi, A

    2015-01-01T23:59:59.000Z

    Thermodynamic property calculations of mixtures containing carbon dioxide (CO$_2$) and water, including brines, are essential in theoretical models of many natural and industrial processes. The properties of greatest practical interest are density, solubility, and enthalpy. Many models for density and solubility calculations have been presented in the literature, but there exists only one study, by Spycher and Pruess, that has compared theoretical molar enthalpy predictions with experimental data. In this report, we recommend two different models for enthalpy calculations: the CPA equation of state by Li and Firoozabadi, and the CO$_2$ activity coefficient model by Duan and Sun. We show that the CPA equation of state, which has been demonstrated to provide good agreement with density and solubility data, also accurately calculates molar enthalpies of pure CO$_2$, pure water, and both CO$_2$-rich and aqueous (H$_2$O-rich) mixtures of the two species. It is applicable to a wider range of conditions than the Spy...

  6. Energy Saving Guidelines for Portland State University Heating and Ventilation

    E-Print Network [OSTI]

    Caughman, John

    Energy Saving Guidelines for Portland State University Heating and Ventilation Conditioned spaces will be heated to a temperature range of 67-70 in the winter and cooled, where applicable, to a temperature range will not be allowed, unless approval from FPM has been granted for cases where spaces cannot otherwise be heated

  7. Measured Air Distribution Effectiveness for Residential Mechanical Ventilation Systems

    SciTech Connect (OSTI)

    Sherman, Max; Sherman, Max H.; Walker, Iain S.

    2008-05-01T23:59:59.000Z

    The purpose of ventilation is dilute or remove indoor contaminants that an occupant is exposed to. In a multi-zone environment such as a house, there will be different dilution rates and different source strengths in every zone. Most US homes have central HVAC systems, which tend to mix the air thus the indoor conditions between zones. Different types of ventilation systems will provide different amounts of exposure depending on the effectiveness of their air distribution systems and the location of sources and occupants. This paper will report on field measurements using a unique multi-tracer measurement system that has the capacity to measure not only the flow of outdoor air to each zone, but zone-to-zone transport. The paper will derive seven different metrics for the evaluation of air distribution. Measured data from two homes with different levels of natural infiltration will be used to evaluate these metrics for three different ASHRAE Standard 62.2 compliant ventilation systems. Such information can be used to determine the effectiveness of different systems so that appropriate adjustments can be made in residential ventilation standards such as ASHRAE Standard 62.2.

  8. LBNL REPORT NUMBER 53776; OCTOBER 2003 ASHRAE &Residential Ventilation

    E-Print Network [OSTI]

    LBNL REPORT NUMBER 53776; OCTOBER 2003 ASHRAE &Residential Ventilation Max Sherman Energy and Community Programs under U.S. Department of Energy Contract No. DE-AC03- 76SF00098. #12;LBNL 53776 Table......................................................................................................12 2 #12;LBNL 53776 Introduction As HVAC&R professionals, our major concern is the engineering

  9. Flash Steam Recovery Project 

    E-Print Network [OSTI]

    Bronhold, C. J.

    2000-01-01T23:59:59.000Z

    /condensate recovery system, resulting in condensate flash steam losses to the atmosphere. Using computer simulation models and pinch analysis techniques, the Operational Excellence Group (Six Sigma) was able to identify a project to recover the flash steam losses as a...

  10. Recovery Boiler Modeling 

    E-Print Network [OSTI]

    Abdullah, Z.; Salcudean, M.; Nowak, P.

    1994-01-01T23:59:59.000Z

    Preliminary computations of the cold flow in a simplified geometry of a recovery boiler are presented. The computations have been carried out using a new code containing multigrid methods and segmentation techniques. This approach is shown...

  11. Recovery Boiler Modeling

    E-Print Network [OSTI]

    Abdullah, Z.; Salcudean, M.; Nowak, P.

    Preliminary computations of the cold flow in a simplified geometry of a recovery boiler are presented. The computations have been carried out using a new code containing multigrid methods and segmentation techniques. This approach is shown...

  12. Recovery Act State Memos Montana

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... 5 RECOVERY ACT SUCCESS STORIES - ENERGY EMPOWERS * Green power transmission line given new life ......

  13. Black Hole Enthalpy and an Entropy Inequality for the Thermodynamic Volume

    E-Print Network [OSTI]

    M. Cvetic; G. W. Gibbons; D. Kubiznak; C. N. Pope

    2011-04-20T23:59:59.000Z

    In a theory where the cosmological constant $\\Lambda$ or the gauge coupling constant $g$ arises as the vacuum expectation value, its variation should be included in the first law of thermodynamics for black holes. This becomes $dE= TdS + \\Omega_i dJ_i + \\Phi_\\alpha d Q_\\alpha + \\Theta d \\Lambda$, where $E$ is now the enthalpy of the spacetime, and $\\Theta$, the thermodynamic conjugate of $\\Lambda$, is proportional to an effective volume $V = -\\frac{16 \\pi \\Theta}{D-2}$ "inside the event horizon." Here we calculate $\\Theta$ and $V$ for a wide variety of $D$-dimensional charged rotating asymptotically AdS black hole spacetimes, using the first law or the Smarr relation. We compare our expressions with those obtained by implementing a suggestion of Kastor, Ray and Traschen, involving Komar integrals and Killing potentials, which we construct from conformal Killing-Yano tensors. We conjecture that the volume $V$ and the horizon area $A$ satisfy the inequality $R\\equiv ((D-1)V/{\\cal A}_{D-2})^{1/(D-1)}\\, ({\\cal A}_{D-2}/A)^{1/(D-2)}\\ge1$, where ${\\cal A}_{D-2}$ is the volume of the unit $(D-2)$-sphere, and we show that this is obeyed for a wide variety of black holes, and saturated for Schwarzschild-AdS. Intriguingly, this inequality is the "inverse" of the isoperimetric inequality for a volume $V$ in Euclidean $(D-1)$ space bounded by a surface of area $A$, for which $R\\le 1$. Our conjectured {\\it Reverse Isoperimetric Inequality} can be interpreted as the statement that the entropy inside a horizon of a given "volume" $V$ is maximised for Schwarzschild-AdS. The thermodynamic definition of $V$ requires a cosmological constant (or gauge coupling constant). However, except in 7 dimensions, a smooth limit exists where $\\Lambda$ or $g$ goes to zero, providing a definition of $V$ even for asymptotically-flat black holes.

  14. Inverse Design Methods for Indoor Ventilation Systems Using1 CFD-Based Multi-Objective Genetic Algorithm2

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    use efficiency are three important29 indices for heating, ventilation and air-conditioning (HVAC1 Inverse Design Methods for Indoor Ventilation Systems Using1 CFD-Based Multi equilibrium and require ventilation rates of12 a space to design ventilation systems for the space

  15. Proceedings of the Intern. Conference on Passive and Low Energy Architecture (PLEA), Toulouse (2002) 577 Cost efficiency of ventilation systems

    E-Print Network [OSTI]

    Gieseler, Udo D. J.

    2002-01-01T23:59:59.000Z

    ) 577 Cost efficiency of ventilation systems for low-energy buildings with earth-to-air heat exchange residential low-energy building are simulated for different ventilation systems with earth-to-air heat, simulation 1 Author to whom correspondence should be addressed. 1) VENTILATION SYSTEMS Ventilation systems

  16. International Journal of Ventilation Volume 2 No 3 Application of CFD to Predict and Control Chemical and Biological

    E-Print Network [OSTI]

    Zhai, John Z.

    attack, since the conventional ventilation systems are not designed for such an attack. How to design ventilation systems that can protect buildings from such an attack is an urgent issue for ventilation system are especially hazardous when they are dispersed inside of a building, where traditional ventilation systems may

  17. Direct measurement of the kinetics of volume and enthalpy relaxation of an Au-based bulk metallic glass

    SciTech Connect (OSTI)

    Bünz, J.; Wilde, G. [Institute of Materials Physics, University of Münster, 48149 Münster (Germany)] [Institute of Materials Physics, University of Münster, 48149 Münster (Germany)

    2013-12-14T23:59:59.000Z

    Structural relaxation of glasses below their glass transition is a well-studied phenomenon that still poses several open issues. With the advent of bulk metallic glasses with exceptionally low glass transition temperatures, new options are available that are based on the experimental assessment of the time dependence of several different thermodynamic quantities by direct measurements with high accuracy. In this contribution the first direct measurement of the isothermal relaxation of the volume and the enthalpy of an Au-based bulk metallic glassformer are reported and discussed with respect of the characteristics describing the underlying processes.

  18. UNICOS CPC New Domains of Application: Vacuum and Cooling & Ventilation

    E-Print Network [OSTI]

    Willeman, D; Bradu, B; Ortola, J

    2011-01-01T23:59:59.000Z

    The UNICOS (UNified Industrial COntrol System) framework, and concretely the CPC (Continuous Process Control) package, has been extensively used in the domain of continuous processes (e.g. cryogenics, gas flows) and also in others specific to the LHC machine as the collimators environmental measurements interlock system. The application of the UNICOS-CPC to other kind of processes: vacuum and the cooling and ventilation cases are depicted here. One of the major challenges was to figure out whether the model and devices created so far were also adapted for other type of processes (e.g. Vacuum). To illustrate this challenge two domain use cases will be shown: ISOLDE vacuum control system and the RFQ4 and STP18 (cooling & ventilation) control systems. Both scenarios will be illustrated emphasizing the adaptability of the UNICOS CPC package to create those applications and highlighting the discovered needed features to include in a future version of the UNICOS CPC package. This paper will a...

  19. Dry Transfer Facility #1 - Ventilation Confinement Zoning Analysis

    SciTech Connect (OSTI)

    K.D. Draper

    2005-03-23T23:59:59.000Z

    The purpose of this analysis is to establish the preliminary Ventilation Confinement Zone (VCZ) for the Dry Transfer Facility (DTF). The results of this document is used to determine the air quantities for each VCZ that will eventually be reflected in the development of the Ventilation Flow Diagrams. The calculations contained in this document were developed by D and E/Mechanical-HVAC and are intended solely for the use of the D and E/Mechanical-HVAC department in its work regarding the HVAC system for the Dry Transfer Facility. Yucca Mountain Project personnel from the D and E/Mechanical-HVAC department should be consulted before use of the calculation for purposes other than those stated herein or used by individuals other than authorized personnel in D and E/Mechanical-HVAC department.

  20. Are Ventilation Filters Degrading Indoor Air Quality in California Classrooms?

    SciTech Connect (OSTI)

    Fisk, William J.; Destaillats, H.; Apte, M.G.; Destaillats,, Hugo; Fisk, Michael G. Apte and William J.

    2008-10-01T23:59:59.000Z

    Heating, ventilating, and cooling classrooms in California consume substantial electrical energy. Indoor air quality (IAQ) in classrooms affects studenthealth and performance. In addition to airborne pollutants that are emitted directly by indoor sources and those generated outdoors, secondary pollutants can be formed indoors by chemical reaction of ozone with other chemicals and materials. Filters are used in nearly all classroom heating, ventilation and air?conditioning (HVAC) systems to maintain energy-efficient HVAC performance and improve indoor air quality; however, recent evidence indicates that ozone reactions with filters may, in fact, be a source of secondary pollutants. This project quantitatively evaluated ozone deposition in HVAC filters and byproduct formation, and provided a preliminary assessment of the extent towhich filter systems are degrading indoor air quality. The preliminary information obtained will contribute to the design of subsequent research efforts and the identification of energy efficient solutions that improve indoor air quality in classrooms and the health and performance of students.

  1. LBNL-XXXXX | Logue et al., Evaluation of an Incremental Ventilation Energy Model for Estimating Impacts of Air Sealing and Mechanical Ventilation

    E-Print Network [OSTI]

    LBNL-XXXXX | Logue et al., Evaluation of an Incremental Ventilation Energy Model for Estimating. Turner, Iain S. Walker, and Brett C. Singer Environmental Energy Technologies Division June 2012 LBNL-5796E #12;LBNL-XXXXX | Logue et al., Evaluation of an Incremental Ventilation Energy Model

  2. ARM - Recovery Act

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMForms About Become a UsergovAboutRecovery Act Recovery Act Logo

  3. Comparison of Two Ventilation Systems in a Chinese Commercial Kitchen 

    E-Print Network [OSTI]

    Wan, X.; Yu, L.; Hou, H.

    2006-01-01T23:59:59.000Z

    ICEBO2006, Shenzhen, China HVAC Technologies for Energy Efficiency, Vol. IV-7-4 Comparison of Two Ventilation Systems in a Chinese Commercial Kitchen Xiongfeng Wan Likui Yu Huabo Hou Master Associate professor Master... viscosity; ? represents thermal expansion coefficient of air; T0 represents temperature of a reference point; T represents temperature; i represents gravity acceleration in i-direction. And the effective viscosity, eff? , equals the sum...

  4. Availability Analysis of the Ventilation Stack CAM Interlock System

    E-Print Network [OSTI]

    Young, J

    2000-01-01T23:59:59.000Z

    Ventilation Stack Continuous Air Monitor (CAM) Interlock System failure modes, failure frequencies, and system availability have been evaluated for the RPP. The evaluation concludes that CAM availability is as high as assumed in the safety analysis and that the current routine system surveillance is adequate to maintain this availability credited in the safety analysis, nor is such an arrangement predicted to significantly improve system availability.

  5. Evaluation of Ventilation Strategies in New Construction Multifamily Buildings

    SciTech Connect (OSTI)

    Maxwell, S.; Berger, D.; Zuluaga, M.

    2014-07-01T23:59:59.000Z

    In multifamily buildings, particularly in the Northeast, exhaust ventilation strategies are the norm as a means of meeting both local exhaust and whole-unit mechanical ventilation rates. The issue of where the 'fresh' air is coming from is gaining significance as air-tightness standards for enclosures become more stringent, and the 'normal leakage paths through the building envelope' disappear. CARB researchers have found that the majority of high performance, new construction, multifamily housing in the Northeast use one of four general strategies for ventilation: continuous exhaust only with no designated supply or make-up air source, continuous exhaust with ducted make-up air to apartments, continuous exhaust with supply through a make-up air device integral to the unit HVAC, and continuous exhaust with supply through a passive inlet device, such as a trickle vent. Insufficient information is available to designers on how these various systems are best applied. Product performance data are based on laboratory tests, and the assumption is that products will perform similarly in the field. Proper application involves matching expected performance at expected building pressures, but there is no guarantee that those conditions will exist consistently in the finished building. This research effort, which included several weeks of building pressure monitoring, sought to provide field validation of system performance. The performance of four substantially different strategies for providing make-up air to apartments was evaluated.

  6. Classroom HVAC: Improving ventilation and saving energy -- field study plan

    SciTech Connect (OSTI)

    Apte, Michael G.; Faulkner, David; Hodgson, Alfred T.; Sullivan, Douglas P.

    2004-10-14T23:59:59.000Z

    The primary goals of this research effort are to develop, evaluate, and demonstrate a very practical HVAC system for classrooms that consistently provides classrooms (CRs) with the quantity of ventilation in current minimum standards, while saving energy, and reducing HVAC-related noise levels. This research is motivated by the public benefits of energy efficiency, evidence that many CRs are under-ventilated, and public concerns about indoor environmental quality in CRs. This document provides a summary of the detailed plans developed for the field study that will take place in 2005 to evaluate the energy and IAQ performance of a new classroom HVAC technology. The field study will include measurements of HVAC energy use, ventilation rates, and IEQ conditions in 10 classrooms with the new HVAC technology and in six control classrooms with a standard HVAC system. Energy use and many IEQ parameters will be monitored continuously, while other IEQ measurements will be will be performed seasonally. Continuously monitored data will be remotely accessed via a LonWorks network. Instrument calibration plans that vary with the type of instrumentation used are established. Statistical tests will be employed to compare energy use and IEQ conditions with the new and standard HVAC systems. Strengths of this study plan include the collection of real time data for a full school year, the use of high quality instrumentation, the incorporation of many quality control measures, and the extensive collaborations with industry that limit costs to the sponsors.

  7. Recovery Act Recipient Data | Department of Energy

    Office of Environmental Management (EM)

    Recovery Act Recipient Data Recovery Act Recipient Data A listing of all Recovery Act recipients and their allocations. Updated weekly. recoveryactfunding.xls More Documents &...

  8. Some Thoughts on Econometric Information Recovery

    E-Print Network [OSTI]

    Judge, George G.

    2013-01-01T23:59:59.000Z

    Paper 1135 Some Thoughts on Econometric Information Recoverys). Some Thoughts on Econometric Information Recovery GeorgeTheoretic Approach To Econometric Information Recovery

  9. Challenges in Industrial Heat Recovery

    E-Print Network [OSTI]

    Dafft, T.

    2007-01-01T23:59:59.000Z

    This presentation will address several completed and working projects involving waste heat recovery in a chemical plant. Specific examples will be shown and some of the challenges to successful implementation and operation of heat recovery projects...

  10. Sparse recovery and Fourier sampling

    E-Print Network [OSTI]

    Price, Eric C

    2013-01-01T23:59:59.000Z

    In the last decade a broad literature has arisen studying sparse recovery, the estimation of sparse vectors from low dimensional linear projections. Sparse recovery has a wide variety of applications such as streaming ...

  11. Challenges in Industrial Heat Recovery 

    E-Print Network [OSTI]

    Dafft, T.

    2007-01-01T23:59:59.000Z

    This presentation will address several completed and working projects involving waste heat recovery in a chemical plant. Specific examples will be shown and some of the challenges to successful implementation and operation of heat recovery projects...

  12. Effect of building airtightness and fan size on the performance of mechanical ventilation systems in new U.S. houses: a critique of ASHRAE standard 62.2-2003

    E-Print Network [OSTI]

    Roberson, J.

    2004-01-01T23:59:59.000Z

    Install Residential Ventilation Systems. The Healthy HouseMechanical Ventilation Systems. Canadian StandardsCode: Whole House Ventilation Systems Research Report. 39

  13. Ventilation for an enclosure of a gas turbine and related method

    DOE Patents [OSTI]

    Schroeder, Troy Joseph (Mauldin, SC); Leach, David (Simpsonville, SC); O'Toole, Michael Anthony (Greenfield Center, NY)

    2002-01-01T23:59:59.000Z

    A ventilation scheme for a rotary machine supported on pedestals within an enclosure having a roof, end walls and side walls with the machine arranged parallel to the side walls, includes ventilation air inlets located in a first end wall of the enclosure; a barrier wall located within the enclosure, proximate the first end wall to thereby create a plenum chamber. The barrier wall is constructed to provide a substantially annular gap between the barrier wall and a casing of the turbine to thereby direct ventilation air axially along the turbine; one or more ventilation air outlets located proximate a second, opposite end wall on the roof of the enclosure. In addition, one or more fans are provided for pulling ventilating air into said plenum chamber via the ventilation air inlets.

  14. Recovery Act State Memos Nebraska

    Energy Savers [EERE]

    ... 6 RECOVERY ACT SUCCESS STORIES - ENERGY EMPOWERS * Biofuels company builds new facility in Nebraska ... 7 * Nebraska appliance rebate...

  15. Recovery Act State Memos Arkansas

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    6 RECOVERY ACT SUCCESS STORIES - ENERGY EMPOWERS * Program finds unique way to fund energy upgrades ... 7 * Green collar courses ......

  16. A Semi-Empirical Model for Studying the Impact of Thermal Mass and Cost-Return Analysis on Mixed-mode Ventilation in Office Buildings

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    -mode Ventilation in Office Buildings Haojie Wang1 and Qingyan Chen2,1,* 1 School of Mechanical Engineering, Purdue-mode ventilation that combines natural ventilation and mechanical ventilation has great potential to save cooling energy when compared to mechanical systems and is more reliable than natural ventilation systems

  17. Internal combuston engine having separated cylinder head oil drains and crankcase ventilation passages

    DOE Patents [OSTI]

    Boggs, D.L.; Baraszu, D.J.; Foulkes, D.M.; Gomes, E.G.

    1998-12-29T23:59:59.000Z

    An internal combustion engine includes separated oil drain-back and crankcase ventilation passages. The oil drain-back passages extend from the cylinder head to a position below the top level of oil in the engine`s crankcase. The crankcase ventilation passages extend from passages formed in the main bearing bulkheads from positions above the oil level in the crankcase and ultimately through the cylinder head. Oil dams surrounding the uppermost portions of the crankcase ventilation passages prevent oil from running downwardly through the crankcase ventilation passages. 4 figs.

  18. Internal combuston engine having separated cylinder head oil drains and crankcase ventilation passages

    DOE Patents [OSTI]

    Boggs, David Lee (Bloomfield Hills, MI); Baraszu, Daniel James (Plymouth, MI); Foulkes, David Mark (Erfstadt, DE); Gomes, Enio Goyannes (Ann Arbor, MI)

    1998-01-01T23:59:59.000Z

    An internal combustion engine includes separated oil drain-back and crankcase ventilation passages. The oil drain-back passages extend from the cylinder head to a position below the top level of oil in the engine's crankcase. The crankcase ventilation passages extend from passages formed in the main bearing bulkheads from positions above the oil level in the crankcase and ultimately through the cylinder head. Oil dams surrounding the uppermost portions of the crankcase ventilation passages prevent oil from running downwardly through the crankcase ventilation passages.

  19. Building America Webinar: Multifamily Ventilation Strategies and Compartmentalization Requirements- Joe Lstiburek

    Broader source: Energy.gov [DOE]

    This presentation will be delivered at the U.S. Department of Energy Building America webinar, Multifamily Ventilation Strategies and Compartmentalization Requirements, on September 24, 2014. Joe...

  20. Field Test of Room-to-Room Distribution of Outside Air with Two Residential Ventilation Systems

    SciTech Connect (OSTI)

    Hendron, R.; Anderson, R.; Barley, D.; Rudd, A.; Townsend, A.; Hancock, E.

    2008-08-01T23:59:59.000Z

    Uniform distribution of outside air is one way to ensure that residential dilution ventilation systems will provide a known amount of fresh air to all rooms.

  1. Room air stratification in combined chilled ceiling and displacement ventilation systems.

    E-Print Network [OSTI]

    Schiavon, Stefano; Bauman, Fred; Tully, Brad; Rimmer, Julian

    2012-01-01T23:59:59.000Z

    Environments. Proceedings of Indoor Air 2005: 10 thInternational Conference on Indoor Air Quality and Climate,displacement ventilation hybrid air conditioning system-

  2. BUILDING VENTILATION AND INDOOR AIR QUALITY PROGRAM. CHAPTER FROM ENERGY AND ENVIRONMENT DIVISION ANNUAL REPORT 1978

    E-Print Network [OSTI]

    Cairns, Elton J.

    2011-01-01T23:59:59.000Z

    heat exchangers; additional subcontract activities consisting of: • field survey of current practices in enforcement of ventilation regulations; COMMERCIAL ENERGY CONSUMPTION DATA (

  3. E-Print Network 3.0 - af noninvasiv ventilation Sample Search...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    materials on Summary: -polluting building materials on ventilation requirements and energy use in buildings", Proceedings of IAQVEC 2007... , Sendai, Japan, on CD-ROM....

  4. Incorporating Energy Efficiency into Disaster Recovery Efforts...

    Energy Savers [EERE]

    Incorporating Energy Efficiency into Disaster Recovery Efforts Incorporating Energy Efficiency into Disaster Recovery Efforts Better Buildings Residential Network Program...

  5. Waste Heat Recovery Opportunities for Thermoelectric Generators...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Waste Heat Recovery Opportunities for Thermoelectric Generators Waste Heat Recovery Opportunities for Thermoelectric Generators Thermoelectrics have unique advantages for...

  6. Elemental sulfur recovery process

    DOE Patents [OSTI]

    Flytzani-Stephanopoulos, M.; Zhicheng Hu.

    1993-09-07T23:59:59.000Z

    An improved catalytic reduction process for the direct recovery of elemental sulfur from various SO[sub 2]-containing industrial gas streams. The catalytic process provides combined high activity and selectivity for the reduction of SO[sub 2] to elemental sulfur product with carbon monoxide or other reducing gases. The reaction of sulfur dioxide and reducing gas takes place over certain catalyst formulations based on cerium oxide. The process is a single-stage, catalytic sulfur recovery process in conjunction with regenerators, such as those used in dry, regenerative flue gas desulfurization or other processes, involving direct reduction of the SO[sub 2] in the regenerator off gas stream to elemental sulfur in the presence of a catalyst. 4 figures.

  7. CO2 MONITORING FOR DEMAND CONTROLLED VENTILATION IN COMMERCIAL BUILDINGS

    SciTech Connect (OSTI)

    Fisk, William J.; Sullivan, Douglas P.; Faulkner, David; Eliseeva, Ekaterina

    2010-03-17T23:59:59.000Z

    Carbon dioxide (CO{sub 2}) sensors are often deployed in commercial buildings to obtain CO{sub 2} data that are used, in a process called demand-controlled ventilation, to automatically modulate rates of outdoor air ventilation. The objective is to keep ventilation rates at or above design specifications and code requirements and also to save energy by avoiding excessive ventilation rates. Demand controlled ventilation is most often used in spaces with highly variable and sometime dense occupancy. Reasonably accurate CO{sub 2} measurements are needed for successful demand controlled ventilation; however, prior research has suggested substantial measurement errors. Accordingly, this study evaluated: (a) the accuracy of 208 CO{sub 2} single-location sensors located in 34 commercial buildings, (b) the accuracy of four multi-location CO{sub 2} measurement systems that utilize tubing, valves, and pumps to measure at multiple locations with single CO{sub 2} sensors, and (c) the spatial variability of CO{sub 2} concentrations within meeting rooms. The field studies of the accuracy of single-location CO{sub 2} sensors included multi-concentration calibration checks of 90 sensors in which sensor accuracy was checked at multiple CO{sub 2} concentrations using primary standard calibration gases. From these evaluations, average errors were small, -26 ppm and -9 ppm at 760 and 1010 ppm, respectively; however, the averages of the absolute values of error were 118 ppm (16%) and 138 ppm (14%), at concentrations of 760 and 1010 ppm, respectively. The calibration data are generally well fit by a straight line as indicated by high values of R{sup 2}. The Title 24 standard specifies that sensor error must be certified as no greater than 75 ppm for a period of five years after sensor installation. At 1010 ppm, 40% of sensors had errors greater than {+-}75 ppm and 31% of sensors has errors greater than {+-}100 ppm. At 760 ppm, 47% of sensors had errors greater than {+-}75 ppm and 37% of sensors had errors greater than {+-}100 ppm. A significant fraction of sensors had errors substantially larger than 100 ppm. For example, at 1010 ppm, 19% of sensors had an error greater than 200 ppm and 13% of sensors had errors greater than 300 ppm. The field studies also included single-concentration calibration checks of 118 sensors at the concentrations encountered in the buildings, which were normally less than 500 ppm during the testing. For analyses, these data were combined with data from the calibration challenges at 510 ppm obtained during the multi-concentration calibration checks. For the resulting data set, the average error was 60 ppm and the average of the absolute value of error was 154 ppm. Statistical analyses indicated that there were statistically significant differences between the average accuracies of sensors from different manufacturers. Sensors with a 'single lamp single wavelength' design tended to have a statistically significantly smaller average error than sensors with other designs except for 'single lamp dual wavelength' sensors, which did not have a statistically significantly lower accuracy. Sensor age was not consistently a statistically significant predictor of error.

  8. Industrial Waste Heat Recovery

    E-Print Network [OSTI]

    Ward, M. E.; Solomon, N. G.; Tabb, E. S.

    1980-01-01T23:59:59.000Z

    INDUSTRIAL WASTE HEAT RECOVREY M. E. Ward and N. G. Solomon E. S. Tabb Solar Turbines International and Gas Research Institute San Diego, California Chicago, Illinois ABSTRACT i I One hundred fifty reports were reviewed along with interviews... tests, promising low temperature heat exchanger tube alloys and coated surfaces were identified. 1INTROUCTION of advanced technology heat recovery techniques 1_ Recovering waste heat from the flue gases of the pr~ary objective. Specific objectives...

  9. Recovery Act Open House

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's PossibleRadiation Protection RadiationRecord-Setting Microscopy IlluminatesHandbookRODs Recovery

  10. Summary of Workshop: Barriers to Energy Efficient Residential Ventilation

    SciTech Connect (OSTI)

    Sherman, Max; Sherman, Max

    2008-01-10T23:59:59.000Z

    The objectives for this workshop were to bring together those with different viewpoints on the implementation of energy efficient ventilation in homes to share their perspectives. The primary benefit of the workshop is to allow the participants to get a broader understanding of the issues involved and thereby make themselves more able to achieve their own goals in this area. In order to achieve this objective each participant was asked to address four objectives from their point of view: (1) Drivers for energy efficient residential ventilation: Why is this an important issue? Who cares about it? Where is the demand: occupants, utilities, regulation, programs, etc? What does sustainability mean in this context? (2) Markets & Technologies: What products, services and systems are out there? What kinds of things are in the pipeline? What is being installed now? Are there regional or other trends? What are the technology interactions with other equipment and the envelope? (3) Barriers to Implementation: What is stopping decision makers from implementing energy-efficient residential ventilation systems? What kind of barriers are there: technological, cost, informational, structural, etc. What is the critical path? (4) Solutions: What can be done to overcome the barriers and how can/should we do it? What is the role of public vs. private institutions? Where can investments be made to save energy while improving the indoor environment? Ten participants prepared presentations for the workshop. Those presentations are included in sections at the end of this workshop report. These presentations provided the principal context for the discussions that happened during the workshop. Critical path issues were raised and potential solutions discussed during the workshop. As a secondary objective they have listed key issues and some potential consensus items which resulted from the discussions.

  11. Smart Ventilation (RIVEC) - 2014 BTO Peer Review | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOriginEducationVideo »UsageSecretary ofSmall BusinessSecondarySmarttheSmartSmart Ventilation

  12. Ventilation Industrielle de Bretagne VIB | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTown of Ladoga,planning methodologiesVenkataraya Fibres Pvt Ltd VFPL JumpVentilation

  13. A Highly Salt-Dependent Enthalpy Change for Escherichia coli SSB Protein-Nucleic Acid Binding Due to Ion-Protein Interactions

    E-Print Network [OSTI]

    Lohman, Timothy M.

    A Highly Salt-Dependent Enthalpy Change for Escherichia coli SSB Protein-Nucleic Acid Binding Due ReceiVed February 5, 1996X ABSTRACT: We have examined the linkage between salt concentration association constant, Kobs, decreases with increasing salt concentration at all temperatures examined

  14. Field and Laboratory Study of a Ground-Coupled Water Source Heat Pump with an Integral Enthalpy Exchange System for Classrooms 

    E-Print Network [OSTI]

    Domitrovic, R.; Hayzen, G. J.; Johnson, W. S.; Chen, F. C.

    2002-01-01T23:59:59.000Z

    water-source heat pump, coupled with a geothermal water loop and incorporating a forced fresh-air enthalpy exchange system was installed in a typical middle school classroom in Oak Ridge, Tennessee. This project is a joint effort among Oak Ridge School...

  15. Lower-Temperature Subsurface Layout and Ventilation Concepts

    SciTech Connect (OSTI)

    Christine L. Linden; Edward G. Thomas

    2001-06-20T23:59:59.000Z

    This analysis combines work scope identified as subsurface facility (SSF) low temperature (LT) Facilities System and SSF LT Ventilation System in the Technical Work Plan for Subsurface Design Section FY 01 Work Activities (CRWMS M&O 2001b, pp. 6 and 7, and pp. 13 and 14). In accordance with this technical work plan (TWP), this analysis is performed using AP-3.10Q, Analyses and Models. It also incorporates the procedure AP-SI.1Q, Software Management. The purpose of this analysis is to develop an overall subsurface layout system and the overall ventilation system concepts that address a lower-temperature operating mode for the Monitored Geologic Repository (MGR). The objective of this analysis is to provide a technical design product that supports the lower-temperature operating mode concept for the revision of the system description documents and to provide a basis for the system description document design descriptions. The overall subsurface layout analysis develops and describes the overall subsurface layout, including performance confirmation facilities (also referred to as Test and Evaluation Facilities) for the Site Recommendation design. This analysis also incorporates current program directives for thermal management.

  16. SURVEY OF THE EXISTING APPROACHES TO ASSESS AND DESIGN NATURAL VENTILATION AND NEED FOR FURTHER DEVELOPMENTS

    E-Print Network [OSTI]

    Boyer, Edmond

    SURVEY OF THE EXISTING APPROACHES TO ASSESS AND DESIGN NATURAL VENTILATION AND NEED FOR FURTHER DEVELOPMENTS Marcello Caciolo, Dominique Marchio, Pascal Stabat Ecole des Mines de Paris- Center for Energy their attention to natural ventilation, due to the potential benefits in terms of energy consumption related

  17. Effect of fluctuating wind direction on cross natural ventilation in buildings from large eddy simulation

    E-Print Network [OSTI]

    Chen, Qingyan "Yan"

    simulation Yi Jiang and Qingyan Chen* Building Technology Program Massachusetts Institute of Technology 77 direction on cross natural ventilation in building from large eddy simulation," Building and Environment, 37 in many industrial applications. To simulate natural ventilation in buildings, however, RANS modeling has

  18. HEAT TRANSFERS IN A DOUBLE SKIN ROOF VENTILATED BY NATURAL CONVECTION IN SUMMER TIME

    E-Print Network [OSTI]

    Boyer, Edmond

    1 HEAT TRANSFERS IN A DOUBLE SKIN ROOF VENTILATED BY NATURAL CONVECTION IN SUMMER TIME P. H and the sheet metal: This is ventilation by natural convection. The remaining conductive heat from the sheet or in tropical and arid countries. In this work, radiation, convection and conduction heat transfers

  19. Building ventilation : a pressure airflow model computer generation and elements of

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Building ventilation : a pressure airflow model computer generation and elements of validation H when heating a residential building, approximately 30% of the energy loss is due to air renewal[1. Thus in tropical climates, natural ventilation affects essentially the inside comfort by favouring

  20. Infiltration Effects on Residential Pollutant Concentrations for Continuous and Intermittent Mechanical Ventilation Approaches

    SciTech Connect (OSTI)

    Sherman, Max; Logue, Jennifer; Singer, Brett

    2010-06-01T23:59:59.000Z

    The prevailing residential ventilation standard in North America, American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) Standard 62.2, specifies volumetric airflow requirements as a function of the overall size of the home and the number of bedrooms, assumes a fixed, minimal amount of infiltration, and requires mechanical ventilation to achieve the remainder. The standard allows for infiltration credits and intermittent ventilation patterns that can be shown to provide comparable performance. Whole-house ventilation methods have a substantial effect on time-varying indoor pollutant concentrations. If alternatives specified by Standard 62.2, such as intermittent ventilation, are used, short-term pollutant concentrations could exceed acute health standards even if chronic health standards are met.The authors present a methodology for comparing ASHRAE- and non-ASHRAE-specified ventilation scenarios on relative indoor pollutant concentrations. We use numerical modeling to compare the maximum time-averaged concentrations for acute exposure relevant (1-hour, 8-hour, 24-hour ) and chronic exposure relevant (1-year) time periods for four different ventilation scenarios in six climates with a range of normalized leakage values. The results suggest that long-term concentrations are the most important metric for assessing the effectiveness of whole-house ventilation systems in meeting exposure standards and that, if chronic health exposure standards are met, acute standards will also be met.

  1. 10/15/03 LBNL-53800 Residential Ventilation Standards Scoping Study

    E-Print Network [OSTI]

    10/15/03 LBNL-53800 Residential Ventilation Standards Scoping Study T-01 Lawrence Berkeley National Laboratory Report Number: LBNL-53800 OVERVIEW This document presents contract no. DE-AC03-76SF00098. #12;VENTILATIONS STANDARDS SCOPING STUDY PAGE LBNL-53800 2 TABLE

  2. Deep-Sea Coral Evidence for Rapid Change in Ventilation of the Deep North Atlantic

    E-Print Network [OSTI]

    Adkins, Jess F.

    Deep-Sea Coral Evidence for Rapid Change in Ventilation of the Deep North Atlantic 15,400 Years Ago radiocarbon and thorium-230 dates from benthic coral species reveal that the ventilation rate of the North to interstadials of longer dura- tion (5). One problem has been that the time resolution of sediments is limited

  3. Video Article Characterization of the Isolated, Ventilated, and Instrumented Mouse Lung

    E-Print Network [OSTI]

    Chesler, Naomi C.

    Video Article Characterization of the Isolated, Ventilated, and Instrumented Mouse Lung Perfused://www.jove.com/details.php?id=2690 DOI: 10.3791/2690 Keywords: Medicine, Issue 50, ex-vivo, mouse, lung, pulmonary vascular impedance of the Isolated, Ventilated, and Instrumented Mouse Lung Perfused with Pulsatile Flow. J. Vis. Exp. (50), e2690

  4. Modeling Alveolar Volume Changes During Periodic Breathing in Heterogeneously Ventilated Lungs

    E-Print Network [OSTI]

    Jeavons, Peter

    Modeling Alveolar Volume Changes During Periodic Breathing in Heterogeneously Ventilated Lungs SARA-uniform breathing pattern for a lung with an inhomogeneous gas distribution, such as that observed in some subjects of irregular breathing caused by small, poorly ventilated regions of the lung. Presented here is an extension

  5. Identifying Mathematical Models of the Mechanically Ventilated Lung Using Equation Discovery

    E-Print Network [OSTI]

    Kersting, Kristian

    1 Identifying Mathematical Models of the Mechanically Ventilated Lung Using Equation Discovery in intensive care medicine by all means. Nevertheless, it can induce severe mechanical stress to the lung, which generally impairs the outcome of the therapy. To reduce the risk of a ventilator induced lung

  6. Evaluation of the effects of contaminant injection location and injection method on the determination of overall relative room ventilation efficiency

    E-Print Network [OSTI]

    Pierce, Stephen Dale

    1994-01-01T23:59:59.000Z

    The purpose of this research is to evaluate an emerging concept called ventilation effectiveness at several points in a real room. Ventilation effectiveness was calculated using the pulse and step-up injection methods which were performed in four...

  7. THE EFFECTS OF ENERGY-EFFICIENT VENTILATION RATES ON INDOOR AIR QUALITY AT AN OHIO ELEMENTARY SCHOOL

    E-Print Network [OSTI]

    Berk, J.V.

    2013-01-01T23:59:59.000Z

    ENERGY-EFFICIENT VENTILATION RATES ON INDOOR AIR QUALITY AT AN OHIOENERGY~EFFICIENT VENTILATION RATES ON INDOOR AIR QUALITY AT AN OHIOenergy conservation opportunities i.n ten elementary schools. 1 Fairmoor Elementary School in Columbus • Ohio

  8. Economic Analysis and Optimization of Exterior Insulation Requirements for Ventilated Buildings at Power Generation Facilities with High Internal Heat Gain

    E-Print Network [OSTI]

    Hughes, Douglas E.

    2010-12-17T23:59:59.000Z

    Industrial buildings require a large amount of heating and ventilation equipment to maintain the indoor environment within acceptable levels for personnel protection and equipment protection. The required heating and ventilation equipment...

  9. Use of Statistical Approach to Design an Optimal Duct System for On-demand Industrial Exhaust Ventilation 

    E-Print Network [OSTI]

    Litomisky, A.

    2010-01-01T23:59:59.000Z

    This paper elaborates on how to use statistics to calculate optimal parameters (including duct diameters) of energy-efficient industrial ventilation systems. Based on the fan-law, on-demand ventilation can save up to 80% ...

  10. Use of Statistical Approach to Design an Optimal Duct System for On-demand Industrial Exhaust Ventilation

    E-Print Network [OSTI]

    Litomisky, A.

    2010-01-01T23:59:59.000Z

    This paper elaborates on how to use statistics to calculate optimal parameters (including duct diameters) of energy-efficient industrial ventilation systems. Based on the fan-law, on-demand ventilation can save up to 80% of electricity compared...

  11. Building America Case Study: Selecting Ventilation Systems for Existing Homes (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-12-01T23:59:59.000Z

    This document addresses adding -or improving - mechanical ventilation systems to existing homes. The purpose of ventilation is to remove contaminants from homes, and this report discusses where, when, and how much ventilation is appropriate in a home, including some discussion of relevant codes and standards. Advantages, disadvantages, and approximate costs of various system types are presented along with general guidelines for implementing the systems in homes. CARB intends for this document to be useful to decision makers and contractors implementing ventilation systems in homes. Choosing the "best" system is not always straightforward; selecting a system involves balancing performance, efficiency, cost, required maintenance, and several other factors. It is the intent of this document to assist contractors in making more informed decisions when selecting systems. Ventilation is an integral part of a high-performance home. With more air-sealed envelopes, a mechanical means of removing contaminants is critical for indoor environmental quality and building durability.

  12. Indoor-Atmospheric Radon-Related Radioactivity Affected by a Change of Ventilation Strategy

    E-Print Network [OSTI]

    Kobayashi, T

    2006-01-01T23:59:59.000Z

    The present author has kept observation for concentrations of atmospheric radon, radon progeny and thoron progeny for several years at the campus of Fukushima Medical University. Accidentally, in the midst of an observation term, i.e., February 2005, the facility management group of the university changed a strategy for the manner of ventilation, probably because of a recession: (I) tidy everyday ventilation of 7:30-24:00 into (II) shortened weekday ventilation of 8:00-21:00 with weekend halts. This change of ventilation manner brought a clear alteration for the concentrations of radon-related natural radioactivity in indoor air. The present paper concerns an investigation of the effect of the ventilation strategy on the indoor-atmospheric radon-related radioactivity.

  13. Impact of Residential Mechanical Ventilation on Energy Cost and Humidity Control

    SciTech Connect (OSTI)

    Martin, E.

    2014-01-01T23:59:59.000Z

    The DOE Building America program has been conducting research leading to cost effective high performance homes since the early 1990's. Optimizing whole house mechanical ventilation as part of the program's systems engineered approach to constructing housing has been an important subject of the program's research. Ventilation in residential buildings is one component of an effective, comprehensive strategy for creation and maintenance of a comfortable and healthy indoor air environment. The study described in this white paper is based on building energy modeling with an important focus on the indoor humidity impacts of ventilation. The modeling tools used were EnergyPlus version 7.1 (E+) and EnergyGauge USA (EGUSA). Twelve U.S. cities and five climate zones were represented. A total of 864 simulations (2*2*3*3*12= 864) were run using two building archetypes, two building leakage rates, two building orientations, three ventilation systems, three ventilation rates, and twelve climates.

  14. Recovery of organic acids

    DOE Patents [OSTI]

    Verser, Dan W. (Menlo Park, CA); Eggeman, Timothy J. (Lakewood, CO)

    2011-11-01T23:59:59.000Z

    A method is disclosed for the recovery of an organic acid from a dilute salt solution in which the cation of the salt forms an insoluble carbonate salt. A tertiary amine and CO.sub.2 are introduced to the solution to form the insoluble carbonate salt and a complex between the acid and an amine. A water immiscible solvent, such as an alcohol, is added to extract the acid/amine complex from the dilute salt solution to a reaction phase. The reaction phase is continuously dried and a product between the acid and the solvent, such as an ester, is formed.

  15. Recovery of organic acids

    DOE Patents [OSTI]

    Verser, Dan W. (Golden, CO); Eggeman, Timothy J. (Lakewood, CO)

    2009-10-13T23:59:59.000Z

    A method is disclosed for the recovery of an organic acid from a dilute salt solution in which the cation of the salt forms an insoluble carbonate salt. A tertiary amine and CO.sub.2 are introduced to the solution to form the insoluble carbonate salt and a complex between the acid and an amine. A water immiscible solvent, such as an alcohol, is added to extract the acid/amine complex from the dilute salt solution to a reaction phase. The reaction phase is continuously dried and a product between the acid and the solvent, such as an ester, is formed.

  16. ARM - Recovery Act Instruments

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadap Documentation TDMADAP :ProductsVaisala CL51Instruments Related Links RHUBC-IIActRecovery Act

  17. Summary - Caustic Recovery Technology

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2Uranium Transferon the Passing of AdmiraltheOil and Less CO2Caustic Recovery

  18. Using a Constant Volume Displacement Ventilation System to Create a Micro Climate in a Large Airport Terminal in Bangkok

    E-Print Network [OSTI]

    Simmonds, P.; Gaw, W.

    1996-01-01T23:59:59.000Z

    Using a Constant Volume Displacement Ventilation System to Create a Micro Climate in a Large Airport Terminal in Bangkok Peter Simmonds Flack + Kurtz New York Abstract In order to conserve energy and create a comfortable climate for both.... CF'D analysis was used to investigate the effectiveness of a displacement ventilation system. A displacement ventilation system pours ventilation air into a space across the floor. The temperature difference between the supply air and the room...

  19. Adjudication Concerning the Contract for the Maintenance of Pipework and Heating, Ventilating and Air-Conditioning Installations

    E-Print Network [OSTI]

    1971-01-01T23:59:59.000Z

    Adjudication Concerning the Contract for the Maintenance of Pipework and Heating, Ventilating and Air-Conditioning Installations

  20. Adjudication of a Contract for the Maintenance of Pipework and Heating, Ventilating and Air-Conditioning Installations

    E-Print Network [OSTI]

    1977-01-01T23:59:59.000Z

    Adjudication of a Contract for the Maintenance of Pipework and Heating, Ventilating and Air-Conditioning Installations