For industrial chiller refrigeration unit failures, when the operating pressure and temperature of the system exceed the normal range, in addition to the indoor and outdoor environmental temperature changes, we mainly consider the relationship between the suction temperature and the discharge temperature. In fact, when the exhaust temperature of the system is very close to the intake temperature. When the suction temperature increases, the exhaust temperature will also increase relatively. Otherwise, it is reduced. After understanding their relationship, we can master and control it well, which will make the refrigeration unit run better and save energy.
In addition, it is necessary to pay attention to the influence of the change of suction pressure on the refrigeration unit. When the refrigeration unit is running, its suction pressure and the evaporation temperature and the flow rate of the refrigerant have a close system. For a system using an expansion valve, the suction pressure is related to the opening degree of the expansion valve, the amount of refrigerant charged, the cooling efficiency of the compressor, and the size of the load. For systems using capillary tubes, the suction pressure is related to the condensing pressure, cooling capacity, compressor and load size. When checking the refrigeration unit. Install a pressure gauge on the suction pipe. This can detect the suction pressure and play an important role in fault analysis.
