HORIZONTAL TYPE CONDENSING UNIT Explanation of the heat transfer process of the condenser of the four major components: We often talk about the refrigeration heat exchanger of the chiller, mainly referring to the condenser and the evaporator, which are two of the four major refrigeration components. to the ability and efficiency of the system to absorb and release heat. Both the condenser and the evaporator involve phase change heat transfer, which is a major feature of these two refrigeration heat exchangers. In addition, there are intercoolers, subcoolers, etc. in some refrigeration systems, the principle of which is similar to that of general heat exchangers.
As for the cooling water tower used by HORIZONTAL TYPE CONDENSING UNIT, it is an indispensable water cooling device for large centralized refrigeration systems. Although it cannot be regarded as a refrigeration heat exchanger, it does participate in heat exchange. We also classify it in this category.
So, what is the heat transfer process? In the HORIZONTAL TYPE CONDENSING UNIT refrigeration system, the high-temperature and high-pressure refrigerant vapor entering the condenser is condensed into liquid by the air or cooling water in the surrounding environment; the low-temperature refrigerant liquid entering the evaporator is removed from the surrounding air or refrigerant. It absorbs heat and gasifies, so that the temperature of a certain area drops and the purpose of refrigeration is achieved. The process of transferring heat between the refrigerant and the surrounding fluid through the tube wall is called a heat transfer process.
According to the form of the solid wall, there are mainly three heat transfer processes in the commonly used HORIZONTAL TYPE CONDENSING UNIT, namely, the heat transfer process through the flat wall, the heat transfer process through the round tube, and the heat transfer process through the wall.
1. Flat-wall heat transfer: When the heat transfer wall is a flat plate, or can be approximated as a flat wall, heat is transferred from the high-temperature liquid on one side to the low-temperature fluid on the other side through the wall, forming a heat transfer through the flat wall. heat transfer.
2. Round tube heat transfer: In the condenser and evaporator of HORIZONTAL TYPE CONDENSING UNIT, a large number of copper and steel heat transfer tubes are used, so heat transfer through round tubes is very common.
3. Heat transfer of the wall: It can be seen from the HORIZONTAL TYPE CONDENSING UNIT heat transfer equation that the heat transfer per unit time not only increases with the increase of the heat transfer coefficient, but also increases with the increase of the heat transfer surface. . When the heat transfer coefficient increases to a certain extent and it is difficult to increase, the heat transfer can be increased by increasing the heat transfer denomination, usually by processing fins or fins on the heat exchange wall.