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A Servel Robur air conditioner compressor unit on Governor's Island, New York City. Servel was an American manufacturer of heating and cooling appliances, founded in 1922. Founded by Colonel William McCurdy to produce refrigerators and named National Electric Products Company, the company adapted and shortened the name "Servel" from their ...
Common absorption refrigerators use a refrigerant with a very low boiling point (less than −18 °C (0 °F)) just like compressor refrigerators.Compression refrigerators typically use an HCFC or HFC, while absorption refrigerators typically use ammonia or water and need at least a second fluid able to absorb the coolant, the absorbent, respectively water (for ammonia) or brine (for water).
Direct-cool refrigerators produce the cooling effect by a natural convection process from cooled surfaces in the insulated compartment that is being cooled. Water vapor that contacts the cooled surface freezes. Therefore, unlike frost-free units, direct-cool units require manual defrosting of the interior.
Adsorption refrigerators are available in the marketplace and are mainly used to produce chilled water from waste heat. Gas adsorption heat pumps are not currently available in the UK, but are just being introduced in Europe as small water or ground source packaged units that provide domestic, low-temperature space heating.
Cooling capacity is the measure of a cooling system's ability to remove heat. [1] It is equivalent to the heat supplied to the evaporator/boiler part of the refrigeration cycle and may be called the "rate of refrigeration" or "refrigeration capacity".
Charles Hurst and David McConnell: An Amish Paradox: Diversity and Change in the World's Largest Amish Community, Johns Hopkins University Press, Baltimore MD 2010 ISBN 9780801893988; Joe Mackall: Plain Secrets: An Outsider among the Amish, Boston, Mass. 2007. ISBN 9780807010648 (Account of a neighbor and friend to a Swartzentruber family)