Industrial cold water machine ten requirements for refrigerants

usually cold water factory produce of industrial cold water machine mainly consists of screw chiller, the wind cold water machine, water, cold water machine, open the cold water machine, low temperature cold water machine, etc, these water chiller in addition to 100% performance tests before they go out, but good filling refrigerant and lubricant convenient customer installed directly use. So, in terms of refrigerant selection, what are the detail questions or guidelines should pay attention to?

let's call these industrial cold water machine, the refrigerant in fact there are some common requests, such as:

1, the critical temperature is higher, phase change under normal temperature or low temperature usually able to attack. This is the basic request of refrigerant steam refrigeration in the cold water machine; 2, suitable for full steam pressure. Transpiration best don't pressure below the atmospheric pressure. Mechanism to avoid air leakage into the cold water cooling system. Condensing pressure cannot be too high, to avoid too much cold water machine and equipment increased. Together, the ratio of the condensing pressure and transpiration also do not want too big, avoid austerity final temperature is too high and the decline of gas transmission coefficient of printing machine. 3, the condensation temperature is low, avoid the refrigerant in the evaporation temperature setting.

4, viscosity and density is smaller, to reduce the flow resistance loss of the industrial mechanism of cold cold water system;

5, the thermal conductivity of ointment. With progress of heat exchanger heat transfer coefficient and reduce the heat transfer area and the metal material consumption;

6, the adiabatic index, can make the chiller power consumption decreases, and tightening process gas temperature at the end of the crunch but high;

7, small heat capacity of liquid. Can reduce the loss of throttling process unit;

8, improve the degree of thermal properties of the loop as large as possible;

9, blasting, non-toxic, not burning, not can't afford to corrode the metal, and lubricating oil chemistry, high temperature not differentiation and harmless to the human body;

10, the price is cheap, easy to obtain;

usually cold water factory produce of industrial cold water machine throughout the use of refrigerant R22, of course, these types of refrigerant can also according to customer's request to select factory practice. About refrigerant selection, also have the corresponding principles: on the premise of thinking basic request, should also be combined with thinking refrigeration compressed tectonic pattern and cold water machine the usefulness of what kind of working medium resolution to use. Such as: in the enclosed squeeze machine, the refrigerant and the motor coil want to touch, so can't use like to work with copper ammonia refrigerants. Household air-conditioning refrigerator refrigerant is expected in the non-toxic, not burning, not burst. Thus each kind of refrigerant selection is inductive thinking results.

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