May I ask, what should be noted during the commissioning of a refrigeration machine?
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As the title suggests, what aspects need to be considered during the commissioning of a refrigeration unit? How long does a commissioning cycle count as successful? What are the main steps required for such a commissioning process? Is it possible to carry out the commissioning without a heat load?
A heat load is necessary; it is recommended that the trial run last at least 4 hours. Since the poster did not provide that type of freezer, a commissioning plan cannot be formulated.
For that screw chiller unit with a capacity of 124.2 KW, which features dual-stage compression per unit, what issues should be taken into consideration during the individual testing of such a chiller?
The absence of heat load can cause liquid to be present in the compressor return gas, which is dangerous!
1. Lubricant temperature 2. Inlet pressure 3. Outlet pressure 4. Current 5. Vibration 6. Whether inlet temperature matches inlet pressure
I’m very sorry; my computer doesn’t have any Chinese input options. You can reduce the flow rate of coolant in the refrigeration compressor. An increase in the suction pressure of the refrigeration compressor will lower the temperature of the heat exchanger. During normal operation of the refrigeration compressor, it’s necessary to check the level and temperature of the lubricating oil, as well as the suction pressure, among other things.
8# shangwt Liquid impact refers to the situation where liquid refrigerant enters the compressor’s suction inlet; during compression, liquids are difficult to compress, which can cause damage to the equipment. Of course, no explosion occurs, but the equipment will still be damaged.
A refrigeration system is a closed-loop system; the four processes in a refrigeration system are compression – condensation – throttling – evaporation. The evaporation process is the process of heat load exchange; without a heat load, the refrigerant cannot evaporate (that is, it cannot turn into a gas). If it cannot evaporate, it will not be drawn in by the compressor for compression, and one can imagine the consequences!