What are the factors that affect the evaporation capaci […]
What are the factors that affect the evaporation capacity of the air-cooled chiller evaporator?
The main indicators to measure the Water Cooled Evaporatorof the air-cooled chiller are the heat transfer coefficient and the heat transfer surface. In order to improve the efficiency of the evaporator, the heat transfer coefficient should first be improved. Then the key to improving the heat transfer coefficient is to improve the convective heat transfer between the refrigerant and the heat transfer tube wall.
Because the surface heat transfer coefficient when the refrigerant is boiling is much greater than the heat transfer coefficient between the vapor and the tube wall, the contact surface between the liquid and the tube wall in the evaporator should be large, and the vapor generated during boiling should be quickly discharged. In fact, it is more difficult to improve the heat transfer coefficient.
When the heat transfer coefficient is constant, the size of the heat exchange surface determines the evaporation capacity of the air-cooled chiller evaporator. Increasing the number of heat transfer tubes and using finned tubes (finned tubes) can effectively increase the heat transfer surface, which are common measures to improve the evaporation capacity.
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