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The water-cooled condenser mentioned here is mainly used in water-cooled chillers. Its function is to convert the high-temperature refrigerant vapor discharged from the compressor into a liquid refrigerant, which is an important way for the refrigeration system to concentrate heat release to the surrounding environment. The equipment is one of the four major components of the chiller, and its quality directly affects the cooling capacity and cooling efficiency.
During the working process of the water-cooled chiller refrigeration system, the outer surface temperature of the condenser is generally close to normal temperature, and it does not feel hot when touched by hand. Once it is found that the surface temperature is too high, the cause should be immediately identified and measures should be taken to eliminate this phenomenon.
Under normal circumstances, the main reason for the increase in the temperature of the condenser is the problem of the cooling water. There are usually the following four situations:
1. The position of the cooling water inlet pipe and outlet pipe is wrong
The normal installation position is generally low water inlet pipe, high water outlet pipe, and "low in and high out". If the water inlet pipe is in a high position, the cooling water cannot be fully swirled in the condenser, the heat transfer area will become smaller, and the cooling will be reduced. The agent vapor cannot be effectively condensed, so that the surface temperature of the condenser rises.
2. The quality of cooling water is too poor
As a result, the inner wall of the cooling water pipe in the condenser is scaled, and the thermal resistance increases, which affects the heat exchange between the refrigerant and the cooling water and reduces the heat transfer effect. This kind of failure often occurs in chillers that have been used for a long time and have not been cleaned regularly. The solution is to remove the limescale.
3. Insufficient cooling water and insufficient water pressure.
The water-cooled condenser relies on cooling water to take away the latent heat released by the refrigerant vapor condenser, so the cooling water pressure is not enough, the flow rate does not meet the rated requirements, the heat dissipation capacity will be limited, and eventually the outer surface temperature of the condenser will rise. .
4. The cooling water temperature is too high, higher than the rated working temperature.
The higher the temperature of the cooling water, the smaller the cooling temperature difference of the refrigerant and the smaller the heat transfer, the refrigerant cannot be effectively cooled, and the surface temperature of the condenser will increase.
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