Low temperature air with high IAQ for dry climates

Journal Article · Sun Jan 01 00:00:00 EST 1995 · ASHRAE Journal (American Society of Heating, Refrigerating and Air-Conditioning Engineers); (United States)

OSTI ID:6497489

Scofield, C M ^[1]; Des Champs, N H ^[2]

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1. Conservation Mechanical Systems, Sebastopol, CA (United States)
2. Des Champs Labs. Inc., Natural Bridge Station, VA (United States)

This article describes how low temperature supply air and air-to-air heat exchangers can furnish 100% outdoor air with reduced peak energy demands. The use of low temperature supply air systems in arid climates greatly simplifies the air-conditioning design. Risks associated with moisture migration and sweating of duct and terminal equipment are reduced. Insulation and vapor barrier design requirements are not nearly as critical as they are in the humid, ambient conditions that exist in the eastern United States. The introduction of outdoor air to meet ASHRAE Standard 62-1989 becomes far less taxing on the mechanical cooling equipment because of the lower enthalpy levels of the dry western climate. Energy costs to assure indoor air quality (IAQ) are lower than for more tropical climates. In arid regions, maintaining acceptable indoor relative humidity (RH) levels becomes a major IAQ concern. For the western United States, coupling an air-to-air heat exchanger to direct (adiabatic) evaporative coolers can greatly reduce low temperature supply air refrigeration energy requirements and winter humidification costs while ensuring proper ventilation.

• OSTI ID: 6497489
• Journal Information: ASHRAE Journal (American Society of Heating, Refrigerating and Air-Conditioning Engineers); (United States), Vol. 37:1; ISSN 0001-2491
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
OFFICE BUILDINGS
AIR QUALITY
EVAPORATIVE COOLING
SPACE HVAC SYSTEMS
ENERGY EFFICIENCY
HUMIDITY CONTROL
INDOOR AIR POLLUTION
AIR POLLUTION
BUILDINGS
CONTROL
COOLING
EFFICIENCY
ENERGY SYSTEMS
ENVIRONMENTAL QUALITY
POLLUTION
320107* - Energy Conservation
Consumption
& Utilization- Building Systems- (1987-)