Knowledge Of Plate heat exchange

Hofmann： www.hfm-phe.com First, the fluorine - water heat exchanger in the water system air conditioning host, plays with the secondary refrigerant heat transfer effect. Generally there are three forms of heat exchanger, A. double pipe heat exchanger; B. shell and tube heat exchanger; C plate heat exchanger. A and B are generally used in large units, with small pressure loss, low water quality requirements, not easy to plug, C general used in small units, with small size, high efficiency, But the water quality requirements are also high. The water system host, must have a heat exchanger, if not the plate must also be other type. Second, the central air-conditioning water system use a small heating boiler to make auxiliary heating, also cascade a heat exchanger, usually the plate in front of the air conditioning host which is behind the circulating water pump in the main channel. It is used for the air conditioning system water and boiler heating water (the...

The heat transfer coefficient of the sewage heat exchanger is small or the heat transfer area is insufficient, which cause the heat pump main engine condition to deteriorate, the low efficiency, the insufficient output. The heat exchanger's pressure capacity is insufficient, to cause the Large deformation to internal part connection, stress concentration, fatigue damage, finally the leakage of water. The fact that heat exchanger blocking capacity is not good, or resistance is too large will increase the system pump consumption. After blocked, if heat exchanger structural design has not convenient clean up maintenance measures, it will cause the burden of operation and maintenance. In fact, the cost of sewage heat exchanger costs about 15% of the entire heat pump room, which is not the main investment part, but plays a vital role. Therefore, this paper suggests that investors do not have to save; because increasing about 20% of the heat transfer area is just to increase their...