subject: Air Cooled Chillers In Air Conditioning And Refrigeration [print this page] To work optimally human beings require a comfortable environment. Needless to say the temperature must be ideal, not too hot nor too cold. Hot weather makes a person sweat and irritable. To tide over this problem, deliver comfort and increase worker productivity, air conditionersare used extensively in offices, hospitals and commercial buildings. For some industries and research facilities cooling is a critical requirement.
A rugged machine which promises optimum cooling is needed in homes and commercialestablishments and in recreation centers like malls and cinemas. Chillersare the devices which produce the low temperatures and pleasant feeling when we step into a mall from the hot exterior.
Chillers achieve the cooling and aredesigned to suit differentpurposes. They maybe water cooled and air cooled screw chillers, water cooled and air cooled scroll chillers, MRI chillers and Ammonia screw chillers.
Air cooled chillers employ a cycle of evaporation and condensation processes insidea closed system to reduce the temperature ofthe air around. These are more efficient than Freon-based chillers used in refrigerators. The evaporator consists of a frame of tubes around a chamber which is connected to a compressor. The compressor joins a condenser which in-turn is connected to the evaporator. Air cooled chiller does not mean water is not used at all. Actually water is not employed to absorb waste heat but used otherwise.
The liquid refrigerant in evaporator chamber makes water in surrounding tubes cold by radiation. This chilled water passes via circuit to be cooled and absorbs heat making the region around it cold. When the water becomes hot it radiates heat to the refrigerant inevaporator and vaporizes it. This vapour on passing through compressor is subjected to high pressure and heat which is then sent to condenser. This has a series of air-cooled vanes where heat is given off to surrounding air. The vapour liquefies here and goes back to evaporator to continue the chilling process.
Many air cooled chiller manufacturers specialize in making chillers for specific industries like plastics and pharmaceuticals and so on. Robust chillers are imperativein deep freeze store houses which refrigerate meat, fruits and vegetables besides in central cooling of huge malls and office buildings.
Residential buildings, high rises and hugevillaswith central air-conditioning facilities require air cooled chillers specially designed for the purpose. Manufacturers deliver value throughcomfort cooling or providing process cooling solutions to industries.
