Wuxi Guanya Refrigeration Technology co., ltd

Selection and installation of the expansion valve for recirculating chillers

Regarding today's topic, we have the following analysis.

The selection of expansion valve plays an important role in the performance of the recirculating chiller refrigeration system. The correct choice of expansion valve will maximize the use of the evaporator and make the evaporator always be matched to the heat load.

First, the selection of thermal expansion valve.

In the recirculating chiller refrigeration system, the selection and installation of the expansion valve is very important. Only the correct selection and installation can ensure the normal operation of the unit. Therefore, when selecting the expansion valve, we can use the appropriate size of the thermal expansion valve according to the size of the evaporator load and the evaporating temperature. The capacity of the commonly used expansion valve is about 20% larger than the evaporator heat load. For small chiller refrigeration systems, gas-filled thermal expansion valves are generally used, and medium-sized recirculating chiller refrigeration systems mostly use adsorption-filled or mixed-filled expansion valves.

Second, the expansion valve installation.

1. The chiller expansion valve is installed in front of the evaporator and is usually installed in a vertical position. Considering the ease of installation and maintenance, the cooling loss is small and should be as close as possible to the inlet of the evaporator.

2. The working condition of the expansion valve for the recirculating chiller has a direct relationship with the installation position of the temperature sensing package. Because the expansion valve completely adjusts the opening size of the expansion valve by the temperature change of the temperature sensing package. The temperature sensor package is installed on the pipe at the outlet of the chiller evaporator. As the evaporator outlet pipe grows, its superheat gradually increases. Therefore, the position of the expansion valve temperature sensing package is directly related to the amount of fluid supplied from the expansion valve.

We, LNEYA, have been engaged in the manufacturing and R&D of industrial refrigeration, heating and temperature control equipment for 15 years and have experienced designers and equipment maintenance personnel. The selection and installation of the expansion valve of the recirculation chiller can be said to be very complete, which not only reduces the failure rate of the equipment, but also allows users to avoid loss of production capacity during use. If you have any questions or needs regarding recirculation chillers, you can contact us at sales@cnzlj.com.

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