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How to adjust the high pressure of the condenser

In the operation of small chillers, changes in temperature will cause changes in condensing pressure. Especially in summer, high condensing pressure will cause the continuous increase of compressor power consumption and the gradual decrease of refrigeration capacity, which indirectly makes the circulation of low-temperature chillers worse. The condensing pressure must be appropriately reduced.In the operation of small chillers, changes in temperature will cause changes in condensing pressure.In the operation of small chillers, changes in temperature will cause changes in condensing pressure.

Then, in winter, the condensing pressure of the unit is too low, the power of the throttle valve is not enough, and the high-pressure liquid pipe is affected by heating factors, which will reduce the capacity of the throttle valve, so it is necessary to control the condensing pressure of the low temperature water cooler. Therefore, the condensing pressure must be controlled throughout the year.Then, in winter, the condensing pressure of the unit is too low, the power of the throttle valve is not enough, and the high-pressure liquid pipe is affected by heating factors, which will reduce the capacity of the throttle valve, so it is necessary to control the condensing pressure of the low temperature water cooler.

Then, in winter, the condensing pressure of the unit is too low, the power of the throttle valve is not enough, and the high-pressure liquid pipe is affected by heating factors, which will reduce the capacity of the throttle valve, so it is necessary to control the condensing pressure of the low temperature water cooler. Therefore, the condensing pressure must be controlled throughout the year.Then, in winter, the condensing pressure of the unit is too low, the power of the throttle valve is not enough, and the high-pressure liquid pipe is affected by heating factors, which will reduce the capacity of the throttle valve, so it is necessary to control the condensing pressure of the low temperature water cooler.

For example, a water-cooled condenser can control the condensing pressure by adjusting the flow rate of cooling water. Install the regulating valve on the cooling water outlet pipe of the condenser. The water regulating valve has two modes: one is the temperature water regulating valve, which uses the temperature of the condenser cooling water outlet to send indirect information. It has a thermostat that inserted in the condensate outlet. When the water temperature increases, the valve opens greatly; when the water temperature decreases, the valve closes very little. The other is the pressure-type water regulating valve, which sends information directly from the condensing pressure and draws the pressure signal from the condenser.

When the condensing pressure gradually increases, the valve opening becomes larger; when the condensing pressure decreases, the valve closes smaller to change the cooling water flow of the condenser.

There is another special case: the water-cooled condenser adopts an independent cooling tower cooling water circulation system. In order to prevent the condensation pressure from being too low, it can be adjusted by a water flow bypass valve, which makes part of the water sent from the condenser to the cooling tower for cooling, and the other part is returned bypass entrance.

For large-scale cryogenic chillers, if multiple cooling water pumps are used to supply water to the water condenser in parallel, the number of pumps can be changed according to the constant change of the condensing pressure to adjust the cooling water flow.


Post time: Nov-19-2020