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U.S. Patent 2457400 for the original design was applied for on December 2, 1944 and issued on December 28, 1948. No patent appears to have been issued for the later production model. Further tests by the US Army at Eglin Field, Florida proved it also useful as carrier for both supplies and men.
A representative pressure–volume diagram for a refrigeration cycle. Vapour-compression refrigeration or vapor-compression refrigeration system (VCRS), [1] in which the refrigerant undergoes phase changes, is one of the many refrigeration cycles and is the most widely used method for air conditioning of buildings and automobiles.
It was originally defined as the rate of heat transfer that results in the freezing or melting of 1 short ton (2,000 lb; 907 kg) of pure ice at 0 °C (32 °F) in 24 hours. [1] [2] The modern definition is exactly 12,000 Btu IT /h (3.516853 kW). Air-conditioning and refrigeration equipment capacity in the U.S. is often specified in "tons" (of ...
Air-conditioner sizes are often given as "tons" of cooling, where 1 ton of cooling equals 12,000 BTU/h (3.5 kW). 1 ton of cooling equals the amount of power that needs to be applied continuously over a 24-hour period to melt 1 ton of ice. The annual cost of electric energy consumed by an air conditioner may be calculated as follows:
The Euclid Company of Ohio made specifically-designed off-road heavy haulers, compared with other companies that modified on-road trucks for off-road earth-hauling.. The Euclid Crane and Hoist Co., formed in 1909 and owned by George A. Armington and his five sons, had become a large, respected and profitable operation by the early 1920s.
The first residential AC was installed by 1914, and by the 1950s there was "widespread adoption of residential AC". [ 13 ] The invention of the components of HVAC systems went hand-in-hand with the Industrial Revolution , and new methods of modernization, higher efficiency, and system control are constantly being introduced by companies and ...
Each car carried 3,000 pounds (1,400 kg) of refrigerant and could maintain a temperature of minus 20 degrees Fahrenheit (−30 °C). During the 1990s, a few railcar manufacturers experimented with the use of liquid carbon dioxide (CO 2) as a cooling agent. The move was in response to rising fuel costs, and was an attempt to eliminate the ...
The Type 3 engine is a variation of the Type 1 engine with pancake cooling arrangement. Variations of the engine were produced by Volkswagen plants worldwide from 1936 until 2006 for use in Volkswagen's own vehicles, notably the Type 1 (Beetle), Type 2 (transporter), Type 3, and Type 4. Additionally, the engines were widely used in industrial ...
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