Carbon dioxide prediction model for VAV system part-load evaluation

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Heating, Piping and Air Conditioning; (United States)

OSTI ID:5944719

Meckler, M ^[1]

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1. Meckler Engineers Group, Encino, CA (United States)

Development of an interactive indoor air quality (IAQ) computer program is particularly helpful in evaluating the more critical variable air volume (VAV) systems, which respond to net space demands for heating and cooling by introducing more or less cooling air into a conditioned space. This article demonstrates the development of such an interactive IAQ/HVAC design computer program. This program is now used by the author's office staff to ensure that ventilation rates selected are capable of satisfying minimum ventilation requirements (in a worst-case scenario in any occupied zone by investigating each zone on a real-time, hourly basis, etc.) and still maintain satisfactory balance between IAQ and energy consumption levels. A step-by-step procedure of their proposed dynamic modeling methodology, employing the alternative IAQ procedure as outlined in paragraph 6.2 of ASHRAE Standard 62-1989 for a ventilation demand-driven system, is described. In addition, estimated time-varying CO[sub 2] concentrations for a representative Los Angeles high-rise office building, the VAV system of which was recently analyzed (employing various outside design air flow rates ranging from 15 through 20 cfm per person) is presented. Estimated CO[sub 2] concentration levels are then be compared to those actually measured through monitoring (once the building is occupied) and can also be used to facilitate IAQ commissioning. This IAQ compliance computer program simultaneously evaluates both thermal comfort and IAQ criteria for various building occupancies.

• OSTI ID: 5944719
• Journal Information: Heating, Piping and Air Conditioning; (United States), Journal Name: Heating, Piping and Air Conditioning; (United States) Vol. 65:1; ISSN HPAOAM; ISSN 0017-940X
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320107* -- Energy Conservation
Consumption
& Utilization-- Building Systems-- (1987-)
AIR POLLUTION
BUILDINGS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
COMPUTER-AIDED DESIGN
COMPUTERIZED SIMULATION
DESIGN
ENERGY SYSTEMS
INDOOR AIR POLLUTION
OFFICE BUILDINGS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
SIMULATION
SPACE HVAC SYSTEMS