Effective means to reduce the resistance of condenser heat transfer system

Effective means to reduce the resistance of condenser heat transfer system

To ensure that the condenser has a higher heat transfer coefficient, it is necessary to reduce the resistance in the system. There are three ways to achieve this goal. Once the resistance in the condenser is reduced, the heat transfer coefficient will naturally increase, and the cooling effect will be better.

One way is to try to use asymmetrical condensers, that is, condensers with unequal cross-sectional areas, which can change the wave geometry on both sides of the plate according to the heat transfer characteristics and pressure drop requirements of the hot and cold fluids to form cold and hot runners. Cross-sectional area of circulation.

　　 In contrast, the heat transfer coefficient of an asymmetric condenser has a small drop, and the pressure drop is greatly reduced. When the flow of the cold and heat medium is relatively large, the use of an asymmetric single-process heat exchanger can reduce the plate area than a symmetrical single-process heat exchanger.

　　 Another way is to add a heat exchanger bypass pipe to the condenser, especially when the flow of cold and heat medium is relatively large, which helps to reduce the flow into the heat exchanger and reduce the resistance. To facilitate adjustment, a regulating valve can also be installed on the bypass pipe.

　　 This way of changing the resistance of the condenser should be a countercurrent arrangement, so that the temperature of the cold medium exiting the heat exchanger is higher, and the temperature of the cold medium after the confluence of the heat exchanger outlet can meet the design requirements. The bypass pipe of the heat exchanger can ensure that the heat exchanger has a higher heat transfer coefficient and reduce the resistance of the heat exchanger.

　　 In addition, the use of multi-process combinations in the condenser can also reduce resistance, mainly by using more processes on the small flow side to increase the flow rate and obtain a higher heat transfer coefficient. On the large flow side, fewer processes are used to reduce the resistance of the cooler.

There will be a mixed flow pattern in the condenser of the multi-process combination, so the average heat transfer temperature difference is slightly lower; and the fixed end plate and the movable end plate of the condenser using the multi-process combination are both connected, so it is in the maintenance work The workload will be relatively large.