Wuxi Guanya Refrigeration Technology co., ltd

Explosion-proof high and low temperature one machine evaporator use note

Each accessory in the explosion-proof high and low temperature integrated machine is more important. Among them, the evaporator has one of the four major accessories, and the refrigeration effect has a certain degree. What are the main choices of the explosion-proof high and low temperature one-piece evaporator?

Due to the influence of the height of the refrigerant liquid column, the evaporation temperature at the bottom of the flooded evaporator is higher than the evaporation temperature of the liquid surface. Different refrigerants have different effects on the evaporating temperature of different liquid levels depending on the height of the hydrostatic fluid. Regardless of the refrigerant, the lower the evaporation temperature of the liquid surface, the greater the effect of the hydrostatic height on the evaporation temperature. Therefore, the effect of the hydrostatic height on the evaporation temperature can be ignored only when the evaporation pressure is high. When the evaporation temperature is low, it cannot be ignored. That is to say, it is uneconomical to use a full liquid evaporator at this time.

If the evaporation temperature is lower than the solidification temperature of the brine, the brine may freeze. In the latter process of the brine, the temperature of the brine is lower and there is a greater likelihood of freezing. When water is used as the brine, it is theoretically possible that the inner wall temperature of the tube can be as low as 0 °C. However, for safety reasons, the inner wall temperature of the tube at the outlet end of the subsequent process is usually kept above 0.5 °C. In the case of brine as a coolant, according to the same principle, the inner wall temperature of the pipe should be higher than the solidification temperature of the brine by more than 1 °C.

The pressure loss caused by the refrigerant flowing through the evaporator inevitably causes the pressure p2 of the refrigerant at the outlet of the evaporator to be lower than the pressure p1 at the inlet, thereby lowering the suction pressure of the compressor, resulting in a decrease in the refrigeration capacity. According to different models, the choice of evaporator is also different, such as box type explosion-proof high and low temperature integrated machine, using water tank coil evaporator; open explosion-proof high and low temperature machine and screw type explosion-proof high and low temperature machine, The shell and tube evaporator is used; for the acid and alkali resistant explosion-proof high and low temperature integrated machine, a titanium tube evaporator or a stainless steel plate exchanger can be selected. An explosion-proof high and low temperature integrated machine can have a variety of options, of course, can be customized according to user needs.

The choice of explosion-proof high and low temperature one-piece evaporator must pay attention to the fact that the evaporator of Wuxi Guanya explosion-proof high and low temperature integrated machine is the evaporator of the selected brand manufacturer, so that it is more efficient in operating the explosion-proof high and low temperature integrated machine.


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