When using HORIZONTAL TYPE CONDENSING UNIT in industrial production, you should pay attention to how to choose an evaporator, and briefly analyze what problems should be paid attention to when choosing an evaporator for HORIZONTAL TYPE CONDENSING UNIT: The evaporator is one of the four major components of the refrigeration system, and it is the key to the cooling effect and efficiency. final manifestation.
Evaporators are generally designed and equipped by HORIZONTAL TYPE CONDENSING UNIT manufacturers, and users do not need to choose. However, in order to better maintain the refrigeration system and ensure its efficient operation, the following points should be noted:
1. The effect of liquid level height on evaporation temperature. Due to the influence of the height of the refrigerant liquid column of HORIZONTAL TYPE CONDENSING UNIT, 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 at different liquid levels by the hydrostatic height. No matter which refrigerant, the lower the evaporating temperature of the liquid level, the greater the influence of the hydrostatic height on the evaporating 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 becomes uneconomical to use a flooded evaporator at this time.
2. The possibility of refrigerant freezing. If the evaporating temperature is lower than the freezing temperature of the refrigerant, the refrigerant may freeze. In the last process of the refrigerant, the temperature of the refrigerant is the lowest and the possibility of freezing is the greatest. When water is used as the refrigerant, theoretically, the temperature of the inner wall of the tube can be as low as 0°C. But for the sake of safety, the temperature of the inner wall of the pipe at the outlet end of the last process is usually kept above 0.5°C. For the case of brine as the refrigerant, according to the same principle, the temperature of the inner wall of the tube should be higher than the solidification temperature of the refrigerant by more than 1 °C.
3. The pressure loss of HORIZONTAL TYPE CONDENSING UNIT refrigerant in the evaporator. The pressure loss caused by the refrigerant flowing through the evaporator will inevitably make the pressure p2 of the refrigerant at the outlet of the evaporator lower than the pressure p1 at the inlet, thereby reducing the suction pressure of the compressor and reducing the cooling capacity. According to different models, the choice of evaporator is also different, such as HORIZONTAL TYPE CONDENSING UNIT, use water tank coil type evaporator; open type condenser and screw type condenser, use shell and tube type evaporator; for acid resistance Alkaline chiller, choose titanium tube evaporator or stainless steel plate exchanger. A chiller has a variety of options, and of course, it can be customized according to user needs.