Absorption Coolers
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Absorption Coolers use heat rather than electricity as their energy source. Because natural gas is the most common heat source for absorption cooling, it is also referred to as gas-fired cooling. Other potential heat sources include propane, solar-heated water, or geothermal-heated water. Although mainly used in industrial or commercial settings, absorption coolers are commercially available for large residential homes.
An absorption cooling cycle relies on three basic principles
- When a liquid is heated it boils (vaporizes) and when a gas is cooled it condenses
- Lowering the pressure above a liquid reduces its boiling point
- Heat flows from warmer to cooler surfaces.