[Mobile Equipment Technology Edition] Daily Question 201805025 Refrigeration System - Refrigeration Equipment (6)
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This post was last edited by YORK Industrial Frozen on 2018-5-28 08:26. This year’s [Daily Question] is divided into three directions.: Screw refrigeration compressor, refrigeration system, and oil system will give you a comprehensive understanding of refrigeration technology. (If you encounter something you don’t know or can’t answer, please actively check the information. While doing so, your abilities will be improved! ) (Anyone who participates in commenting on this post will be rewarded with 1-3 wealth, and the answer is 10-15, valid for two days) ============================== Refrigeration system-refrigeration equipment (6): What is the role of regenerator in refrigeration system? Regenerator principle: The return air from the evaporator to the compressor exchanges heat with the liquid supply from the condenser. Superheating the return air to the compressor and subcooling the liquid supply to the condenser to increase the cooling capacity are often used in the low-temperature stage of cascade refrigeration systems. ============================== Premium promotion: Moving equipment---York compressor maintenance and debugging video https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1806833 Moving equipment---York screw compressor maintenance process https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1806833 Moving equipment---York Quantum control center upgrade https://bbs.hcbbs.com/thread-1804837-1-1.html Moving equipment---GEA Grasso screw compressor overhaul https://bbs.hcbbs.com/thread-1800467-1-1.html Moving equipment---Howden screw compressor disassembly and maintenance in the UK https://bbs.hcbbs.com/thread-1832529-1-1.html Moving equipment---Japanese Maekawa MYCOM screw compressor disassembly and maintenance https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=
The main function of the regenerator is to increase the return air temperature of the compressor, allowing the refrigerant droplets entrained by the refrigerant vapor to vaporize when it exits the evaporator, reducing the chance of a wet stroke in the fully enclosed compressor, reducing the noise generated when the compressor is working, and reducing the temperature of the liquid refrigerant in the throttling capillary tube, so that the flash gas generated when the refrigerant passes through the throttling capillary tube* * Reduce, thereby increasing the cooling capacity of the refrigeration system.
①Make the gas entering the compressor become superheated steam, reducing harmful overheating； ②Evaporate the liquid droplets entrained in the return air to prevent liquid slugging in the compressor ； ③Subcool the liquid entering the evaporator to reduce throttling losses.
The recuperative heat exchanger used in the Freon refrigeration system is a gas-liquid recuperator, which allows the refrigerant liquid condensed by the condenser to pass through the regenerator first and then go to the throttle valve.: The refrigerant vapor that absorbs heat and vaporizes in the evaporator first passes through the regenerator and then is refrigerated and compressed.
A regenerator is a device that transfers heat from one medium to another.
It increases the return air temperature of the compressor, allowing the refrigerant droplets entrained by the refrigerant vapor to vaporize when it leaves the evaporator, reducing the chance of a wet stroke in the fully enclosed compressor, reducing the noise generated when the compressor is working, and lowering the temperature of the liquid refrigerant in the throttling capillary tube, so that the flash gas generated when the refrigerant passes through the throttling capillary tube* * Reduce, thereby increasing the cooling capacity of the refrigeration system.
One is to supercool the high-pressure liquid before throttling to avoid vaporization before throttling, and at the same time increase the compressor suction temperature to reduce harmful overheating and improve compressor working conditions.； Second, refrigerants such as R12 and R502 can improve the refrigeration coefficient of their refrigeration devices. ； The third is to offset the vaporization of the liquid entrained in the gas, which can not only recover the cooling capacity but also ensure the normal oil return of the compressor.
The regenerator in the refrigeration system usually has three important functions: (1) It can improve the performance coefficient of the refrigeration system; (2) It makes the liquid leaving the condenser supercooled to avoid vaporization before throttling; (3) It allows the liquid entrained in the vapor after leaving the evaporator to vaporize before entering the compressor.
It increases the return air temperature of the compressor, allowing the refrigerant droplets entrained by the refrigerant vapor to vaporize when it leaves the evaporator, reducing the chance of a wet stroke in the fully enclosed compressor, reducing the noise generated when the compressor is working, and lowering the temperature of the liquid refrigerant in the throttling capillary tube, so that the flash gas generated when the refrigerant passes through the throttling capillary tube* * Reduce, thereby increasing the cooling capacity of the refrigeration system.
Through the regenerator, the liquid close to the ambient temperature inside the capillary tube transfers heat to the low-temperature gas inside the return pipe of the evaporator. As a result, the temperature of the liquid passing through the capillary tube drops and the temperature of the refrigerant vapor sucked into the compressor rises. Using a regenerator to perform a refrigeration cycle with regenerative heat can increase the refrigeration coefficient of the refrigeration system, thereby obtaining greater cooling capacity while consuming less electricity. The functions of the regenerator mainly include the following two aspects:: 1) Increase the return air temperature of the compressor, allowing the refrigerant droplets entrained by the refrigerant vapor to vaporize when it exits the evaporator, reducing the chance of a wet stroke in the fully enclosed compressor and reducing the noise generated by the compressor during operation. 2) Reduces the temperature of the liquid refrigerant in the throttling capillary tube, causing the flash gas generated when the refrigerant passes through the throttling capillary tube * * Reduce, thereby increasing the cooling capacity of the refrigeration system.