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Cooling gas and environmental protection

If by absorbent liquid or solid adsorbent was carried out on the refrigerant vapor absorption or adsorption, recycle driving heat source heat absorption or adsorption working medium, to produce high pressure and temperature of the refrigerant vapor, such way of refrigeration, respectively called the absorption refrigeration and adsorption refrigeration; Also using heat energy sources as a driver, but using ejector suction vapor from the evaporator and compressed to high pressure, known as the steam jet refrigeration.

vapor compression refrigeration

in ordinary refrigeration temperature range, vapor compression refrigeration is the dominant mode of refrigeration. It belongs to the cooling liquid, rely on consumption of electricity or function to realize heat from low temperature heat source, the high temperature heat source heat release. In 1834 with ether as the working medium, an American inventor Mr Perkins successfully for the first time the closed cycle vapor compression refrigeration, this is the rudiment of industrial ice machine vapor compression type. After taking ammonia as the main, after a period of refrigerant in the 1930 s, the Buddha Lyon refrigerant found revolutionary to promote the development of the vapor compression refrigeration. This year, with the increasingly serious environmental problem, the application of the natural working substance such as ammonia, carbon dioxide, and to get people's attention.

here to do a simple experiment:

vapor compression refrigeration system consists of compressor, condenser, expansion valve, evaporator of four basic parts, through the pipe connect them into a sealing system.

its working process is as follows:

1) Liquid refrigerant in the evaporator at low temperature and the cooling object heat exchange, absorption of the cooling heat and boil.

2) The low pressure steam in the compressor, after compression with decorous eduction.

3) compressor discharge of high pressure gas entering the condenser, gives off heat to the cooling medium ( Is generally at room temperature with air or water) , condenses into high pressure liquid.

4) Elegant liquid flows through expansion valve ( Or other throttling element) Throttling, into a low pressure low temperature, gas and liquid two phase mixture into the evaporator, the liquid industrial ice machine in the evaporator evaporation cooling, produced by low pressure steam in the compressor again. Such a cycle, form a loop.

vapor compression refrigeration development up to now, has reached a fairly complete degree. It refrigeration temperature range from ambient temperature to - 150 ℃ can be realized, but temperature ( - Below 70 ℃) Low comprehensive performance variation; Large range of stand-alone refrigeration capacity ( From about 100 watts to several hundred kw) And specifications; Refrigeration efficiency high, nowadays it is widely used in air conditioning refrigeration, petroleum, chemical, food and other fields.
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