【Mechanical Equipment Technology Edition】Daily Question 201804010: Important Case Analysis of Refrigeration Units
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This post was last edited by YORK Industrial Refrigeration on 2018-4-10 at 17:33. This year’s 【Daily Question】is divided into three categories: screw refrigeration compressors, refrigeration systems, and oil circuits, aiming to provide a comprehensive understanding of refrigeration technology. (If you encounter something you don’t know or can’t answer, please actively look up information; by doing so, your skills will improve!) ) All participants in the comments on this post will receive 1-3 units of wealth as a reward; those who provide complete answers will get 10-15 units, with the reward valid for one week. ============================== Dual-machine, two-stage screw compressors –35°C unit, using Freon as the refrigerant and ethylene glycol as the coolant. Main phenomena: 1. The temperature of ethylene glycol cannot be reduced. 2. The low-pressure compressor experiences cyclic loading and unloading. 3. The intermediate pressure is high. 4. The high-pressure compressor remains at full load. Please analyze what the possible causes of these faults might be How can the phenomena in the above four points be explained? ============================== High-quality promotions: Mechanical equipment——Videos on the repair and adjustment of York compressors https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1806833 Mechanical equipment——Maintenance procedures for York screw compressors https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1806833 Mechanical equipment——Upgrading of York Quinton control centers https://bbs.hcbbs.com/thread-1804837-1-1.html Mechanical equipment——Major repairs of GEA Grasox screw compressors https://bbs.hcbbs.com/thread-1800467-1-1.html Mechanical equipment——Disassembly and maintenance of British HOWDEN screw compressors https://bbs.hcbbs.com/thread-1832529-1-1.html Mechanical equipment——Disassembly and maintenance of Japanese Maekawa MYCOM screw compressors https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=
Let’s learn it*; I hope to see the correct answer
If the temperature of ethylene glycol cannot be reduced, it may be due to a malfunction in the cooling system； The cyclic loading and unloading in the low-pressure machine may be caused by a problem with the sealing ring ； A high intermediate pressure may be due to the opening degree of the pipeline valves, or poor cooling efficiency ； The high-pressure compressor may not be able to lower its cooling temperature when operating at full load
If the temperature of ethylene glycol cannot be reduced, it may be due to a malfunction in the cooling system； The cyclic loading and unloading in the low-pressure machine may be caused by a problem with the sealing ring ； A high intermediate pressure may be due to the opening degree of the pipeline valves, or poor cooling efficiency ； The high-pressure compressor may not be able to lower its cooling temperature when operating at full load
I don’t even dare to answer this question...... I’m afraid of looking stupid
Only by answering can one realize the gaps in understanding~~ It’s okay if it’s someone you know; there’s no need to be afraid~