Several aspects of screw chiller selection must be known! As long as these aspects are clear, the product will not be unusable. So what are these aspects? The following is a detailed introduction by the editor of Shenzhen Amy Hi Tech Refrigeration Co., Ltd
As we all know, screw chillers are widely used in industry. Take our Amigo factory as an example, many new energy industries, such as the production of positive and negative pole materials, vacuum coated glass, gypsum building materials, and Taishan gypsum, use screw chillers.
Screw chiller is named as screw chiller because its key component compressor is screw chiller. Heat dissipation methods are divided into water-cooled screw chiller and air-cooled screw chiller. The cooling capacity of screw chillers ranges from 100kw/h to 860kw/h, and special large chillers can be customized. Because of their advantages such as high operating efficiency, good refrigeration, fewer vulnerable parts, and low failure rate, they have a rising trend year by year in the industrial equipment market!
And how to choose the right screw chiller for the dazzling array of chillers? Now let's follow Amy High Refrigeration Technology.
1. Firstly, the model can be selected according to the load control of screw chiller. As for the refrigeration system with long operation time under low load, the multi head screw compressor unit is selected to save energy. The double head and three head screw chillers can automatically determine the capacity of the open compressor as the load changes, so as to ensure that the open compressor is in operation and save power.
2. The load range and use frequency of the chiller should be considered. The multi head screw chiller has excellent partial load performance. The screw chiller can be selected according to the actual situation of the factory. For example, in the glass hot bending machine equipment workshop and the sand mill equipment workshop, one to many centralized cooling is usually used. One high-power water chiller is equipped with several sand mills, and the hot bending machine is used for cooling.
At this time, screw chiller is used to save energy and facilitate operation and maintenance.
3. When screw chiller is selected, the actual refrigerating capacity of chiller is related to the following points:
a. The chilled water outlet temperature and return water temperature of the refrigerator are the inlet and outlet water temperature of the shell and tube evaporator.
b. The inlet water temperature, flow rate and dirt coefficient of the cooling circulating water of the refrigerator refer to the inlet and outlet water temperature of the condenser.
c. If the air-cooled screw unit is selected, pay attention to the ambient temperature and humidity, which will directly affect the efficiency and service life of the refrigerator.
d. Screw chillers are used in special chemical, pharmaceutical, aerospace, machinery, aviation, chemical fiber and other industries. If there are special requirements, it is necessary to make clear to the Kedley technicians in advance, such as whether the electrical appliances are explosion-proof, and whether the shell and tube evaporator is anti-corrosion.
4. When selecting screw chiller, pay attention to the operating current of normal industrial production, mainly the current limit of motor and the current value of shaft power.
5. Under the nominal flow condition, the outlet temperature of chilled water shall not exceed 15 ℃, and the evaporation temperature shall not be higher than that of the screw unit, otherwise the liquid return will be severe, causing liquid hammer. The outdoor dry bulb temperature shall not exceed 43 ℃.
The above are some important selection precautions that Amy High Refrigeration Technology told friends. You need to use them flexibly to ensure that you can buy your own screw chiller.
You are welcome to pay attention to the official website of Amy High Refrigeration Technology, and we will continuously update you with little knowledge in the chiller industry.