Condensers are used to heat air (gas) due to the heat received from Freon (R) condensing inside the pipes. Air cooled condensers are widely used in a wide variety of refrigeration systems, chillers and heat pumps. Hot freon in a gaseous state is supplied to the upper part of the condenser, then condenses in tubes cooled by an air stream, and in the liquid phase enters the lower part of the condenser. Structurally, the condenser, as well as the evaporator, is a heat exchanger consisting of copper pipes installed in rows in a rectangular heat exchanger body. The pipes are sequentially soldered into common collectors, which are also made of red-copper pipes of a larger diameter. The collectors are combined into one inlet and one outlet. The outer part of the pipes has plates made of brass, aluminum, steel, performing the function of ribbing. Heat exchange is carried out through the plates between air (gases) and freon inside the pipes. The heat transfer coefficient K in condensers with forced air circulation across the tube bundle due to the operation of the fan reaches values of 25-37 W / (m2 K).
Air cooled condensers can be designed for all types of refrigerants.
Refrigeration machine schematic diagram
1 - compressor;
2 - evaporator;
3 - TRV (thermostatic valve);
4 - capacitor
An air-cooled condenser, in this scheme, solves the problem of cooling and condensing freon, or heating air or gases to the design parameters.
|Pipe material|| Copper, steel|
|Finning material||Brass, aluminum, steel|
|Pipe spacing in the tube sheet, mm||4; 6; eight; other|
|Air throughput, nm 3 / h||1000 ... 200000|
|Refrigerant||R134A, R404A, R407C, others|
|Operating temperature range, ºC||-50 ... +50|
|Working pressure in the refrigerant circuit, bar||30, others on request|
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