Treatment of refrigerant leakage in chillers and subsequent issues

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This post was last edited by wawa*n*ntaozi on 2017-11-26 at 11:28. In the operation of the company’s ethanol chiller, the temperature of the coolant keeps rising; initially, with a load of around 40%, the temperature could be reduced to -40°C, but by the time the load reached 90%, the temperature could only drop to -30°C. Therefore, it is assumed that there is a refrigerant leak. Contact the manufacturer for handling. The leak was caused by cracks in the weld of the pipe connection at the base valve of the oil-gas separator safety valve. The image above is the photo after repair. The image above shows the location of the safety valve of the oil-gas separator. The attached file is the video of the leak. After fixing the leak, the workshop added 8 bottles of Freon and started up the equipment for a trial run. The graph above shows the pressures in various components before operation, while the graph below shows those pressures after operation when the machine is stopped. Based on the current situation, the pressure after operation is around 3 bar; a portion of liquid remains in the condenser and evaporator, which results in a lower pressure when at rest. After restarting recently, the load capacity increased to 60%, and the temperature of the cryogen was -40°C. Excuse me, is there still a leak in the chiller? Chemical Equipment and Machinery