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After several more years of refinement and field testing, on January 2, 1906, Carrier was granted U.S. patent 808,897 for an Apparatus for Treating Air, the world's first spray-type air conditioning equipment. It was designed to humidify or dehumidify air, heating water for the first function and cooling it for the second.
The efficiency of air conditioners is often rated by the seasonal energy efficiency ratio (SEER), which is defined by the Air Conditioning, Heating and Refrigeration Institute in its 2008 standard AHRI 210/240, Performance Rating of Unitary Air-Conditioning and Air-Source Heat Pump Equipment. [61]
D&H Distributing was founded as Economy Tire and Rubber, a tire retreading company, established by brothers-in-law David Schwab and Harry Spector. In 1921, the company began selling wholesale parts for automobile service industry, adding crystal radios by 1926 and moving into a distribution capacity by signing with radio manufacturer Philco.
HD Supply Holdings, Inc. (formerly Maintenance Warehouse) is an industrial distributor in North America. The company provides a broad range of products and value-added services to approximately 250,000 professional customers in maintenance, repair and operations, infrastructure and power and specialty construction sectors. [ 4 ]
D+H (originally Davis & Henderson) was a Canadian global payments and lending technology provider serving nearly 8,000 financial institutions, specialty lenders, community banks, credit unions, governments and corporations, including Canada's five largest banks. [3]
The magnetocaloric effect can be quantified with the following equation: = ((,)) ((,)) where is the adiabatic change in temperature of the magnetic system around temperature T, H is the applied external magnetic field, C is the heat capacity of the working magnet (refrigerant) and M is the magnetization of the refrigerant.
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