Makeup air systems energy-saving opportunities

Conference · Mon Jan 01 04:00:00 EST 1990 · ASHRAE Transactions (American Society of Heating, Refrigerating and Air-Conditioning Engineers); (United States)

OSTI ID:5162715

Brown, W K ^[1]

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1. Anderson DeBartolo Pan, Inc., Tucson, AZ (US)

Makeup air semiconductor clean spaces can vary from 1 cfm/ft{sup 2} (5.08 L/s {center dot} m{sup 2}) to 10 cfm/ft{sup 2} (50.81 L/s {center dot} m{sup 2}) and typically averages 5 cfm/ft{sup 2} (25.4 L/s {center dot} m {sup 2}). Accordingly, the energy requirements to cool, dehumidify, preheat, and/or humidify are significant and can represent 30% to 65% of the total thermal energy required to maintain a cleanroom environment. Because of high energy requirements, cost-effective means to reduce energy costs can influence unit production costs. The greatest opportunity for significant energy savings can be achieved by reducing or displacing mechanical cooling or fuel-generated heating requirements. The primary focus of this paper is to present and discuss various concepts of heat recovery, dual-temperature cooling, direct and indirect evaporative cooling, and heat rejection directed toward makeup air systems that can achieve these objectives. In addition, equipment-sizing considerations not necessarily applicable to systems that are less energy intensive or that operate continuously are explored.

• OSTI ID: 5162715
• Report Number(s): CONF-9006117--
• Conference Information: Journal Name: ASHRAE Transactions (American Society of Heating, Refrigerating and Air-Conditioning Engineers); (United States) Journal Volume: 96:2
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320106* -- Energy Conservation
Consumption
& Utilization-- Building Equipment-- (1987-)
AIR CLEANING SYSTEMS
ATMOSPHERES
BUILDINGS
CLEAN ROOMS
CONTROLLED ATMOSPHERES
COOLING SYSTEMS
COST ESTIMATION
DEHUMIDIFICATION
ENERGY CONSERVATION
ENERGY CONSUMPTION
ENERGY SYSTEMS
ENGINEERED SAFETY SYSTEMS
EQUIPMENT
HEAT RECOVERY EQUIPMENT
VENTILATION