The impact of demand-controlled and economizer ventilation strategies on energy use in buildings
Abstract
The overall objective of this work was to evaluate typical energy requirements associated with alternative ventilation control strategies for constant-air-volume (CAV) systems in commercial buildings. The strategies included different combinations of economizer and demand-controlled ventilation, and energy analyses were performed for four typical building types, eight alternative ventilation systems, and twenty US climates. Only single-zone buildings were considered so that simultaneous heating and cooling did not exist. The energy savings associated with economizer and demand-controlled ventilation strategies were found to be very significant for both heating and cooling. In general, the greatest savings in electrical usage for cooling with the addition of demand-controlled ventilation occur in situations where the opportunities for economizer cooling are less. This is true for warm and humid climates and for buildings that have relatively low internal gains (i.e., low occupant densities). As much as 20% savings in electrical energy for cooling were possible with demand-controlled ventilation. The savings in heating energy associated with demand-controlled ventilation were generally much larger but were strongly dependent upon the building type and occupancy schedule. Significantly greater savings were found for buildings with highly variable occupancy schedules and large internal gains (i.e., restaurants) as compared with office buildings. In somemore »
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Colorado, Boulder, CO (US)
- OSTI Identifier:
- 20085601
- Resource Type:
- Conference
- Resource Relation:
- Conference: ASHRAE Annual Meeting, Seattle, WA (US), 06/18/1999--06/23/1999; Other Information: PBD: 1999; Related Information: In: ASHRAE Transactions: Technical and symposium papers presented at the 1999 annual meeting in Seattle, Washington of the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.; Volume 105, Part 2, by Geshwiler, M.; Harrell, D.; Roberson, T. [eds.], 1360 pages.
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; COMMERCIAL BUILDINGS; VENTILATION SYSTEMS; CONTROL SYSTEMS; COMPARATIVE EVALUATIONS; ENERGY CONSUMPTION; ECONOMIZERS; ENERGY ANALYSIS; CLIMATES; ENERGY EFFICIENCY; SPACE HVAC SYSTEMS
Citation Formats
Brandemuehl, M J, and Braun, J E. The impact of demand-controlled and economizer ventilation strategies on energy use in buildings. United States: N. p., 1999.
Web.
Brandemuehl, M J, & Braun, J E. The impact of demand-controlled and economizer ventilation strategies on energy use in buildings. United States.
Brandemuehl, M J, and Braun, J E. 1999.
"The impact of demand-controlled and economizer ventilation strategies on energy use in buildings". United States.
@article{osti_20085601,
title = {The impact of demand-controlled and economizer ventilation strategies on energy use in buildings},
author = {Brandemuehl, M J and Braun, J E},
abstractNote = {The overall objective of this work was to evaluate typical energy requirements associated with alternative ventilation control strategies for constant-air-volume (CAV) systems in commercial buildings. The strategies included different combinations of economizer and demand-controlled ventilation, and energy analyses were performed for four typical building types, eight alternative ventilation systems, and twenty US climates. Only single-zone buildings were considered so that simultaneous heating and cooling did not exist. The energy savings associated with economizer and demand-controlled ventilation strategies were found to be very significant for both heating and cooling. In general, the greatest savings in electrical usage for cooling with the addition of demand-controlled ventilation occur in situations where the opportunities for economizer cooling are less. This is true for warm and humid climates and for buildings that have relatively low internal gains (i.e., low occupant densities). As much as 20% savings in electrical energy for cooling were possible with demand-controlled ventilation. The savings in heating energy associated with demand-controlled ventilation were generally much larger but were strongly dependent upon the building type and occupancy schedule. Significantly greater savings were found for buildings with highly variable occupancy schedules and large internal gains (i.e., restaurants) as compared with office buildings. In some cases, the primary heating energy was virtually eliminated by demand-controlled ventilation as compared with fixed ventilation rates. For both heating and cooling, the savings associated with demand-controlled ventilation are dependent on the fixed minimum ventilation rate of the base case at design conditions.},
doi = {},
url = {https://www.osti.gov/biblio/20085601},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jul 01 00:00:00 EDT 1999},
month = {Thu Jul 01 00:00:00 EDT 1999}
}