Makeup air systems energy-saving opportunities

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

OSTI ID:5162715

Brown, W K ^[1]

---

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-; CODEN: ASHTA
• Journal Information: ASHRAE Transactions (American Society of Heating, Refrigerating and Air-Conditioning Engineers); (United States), Vol. 96:2; Conference: Annual meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE), St. Louis, MO (United States), 9-13 Jun 1990; ISSN 0001-2505
• Country of Publication: United States
• Language: English

Related Subjects

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