Gas-fired absorption chiller

Mechanical equipment that is used to generate chilled water for cooling of buildings. Conventional chillers use electricity as the energy source, whereas gas-fired absorption chillers use clean-burning natural gas. While conventional chillers have a compressor and use refrigerants to produce cooling, absorption chillers contain an absorber, generator, pump, and heat exchanger, and they do not use ozone-depleting substances. The absorption cycle uses environmentally friendly working fluids, namely, water (refrigerant) and lithium bromide (absorbent). Some absorption chillers use ammonia as the refrigerant and water as the absorbent.

References in periodicals archive

The gas-fired absorption chiller system at the Main Library makes it unique among CALS properties.

Case study: CALS sees energy savings

* In order to meet a simultaneous need for both chilled and hot water and still maximize energy-cost avoidance, Honeywell installed a 300-ton gas-fired absorption chiller. This allowed for a supply of 300 tons of chilled water while simultaneously producing 600 gallons per minute of 102-degree water.

Energy audit leads to big savings for Lucent Technologies

* CFC- and HCFC-free natural gas-fired absorption chillers will be used for heating and cooling in place of conventional fossil fuel-driven electric systems.

Durst's Four Times Square: a lesson in high-rise environmental responsibility

Direct, gas-fired absorption chillers offer a COP of 1.3 and can be used as chiller-heaters, eliminating the need for a separate boiler.

Take the bite out of CFC replacement by improving chiller plant efficiency

These factors suggest that the best cooling choice is a hybrid approach, in which gas-fired absorption chillers are used during peak electric rate periods and electricity-driven centrifugal chillers are used at other times.

Design challenges in absorption chillers

In "The New Economics of Gas Cooling," Mike Byars of The Trane Co., LaCrosse, WI, spoke on the benefits of bringing gas-fired absorption chillers on-line in tandem with thermal energy storage and traditional units during chiller conversions/replacements.

Environmental savvy: 1994's passport to HVAC harmony

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