【Mechanical Equipment Technology Edition】Daily Question 201708023: Subcooling in refrigeration principles – Earn wealth and Haichuan coins! !
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Starting today, in order to enhance communication among those interested in marine equipment, we have launched the 【Daily Question】 initiative on the Mechanical Equipment Technology forum. We encourage everyone to participate actively so that we can all progress and improve together! ! ! Rewards: 3 wealth for active participation, 10-15 wealth for correct answers. This question is valid for two days; no scoring will be given after that. Question: “Subcooling” refers to the cooling of the refrigerant liquid at the outlet of the condenser before it is sent to the evaporator. What is your understanding of supercooling? It is best to analyze it in conjunction with a pressure-enthalpy diagram (highest score plus wealth and HaiChuan coins)! If you want to learn more in depth, we can discuss it together. Answer: Throttling to reduce pressure generates flashing gas, which enters the evaporator and affects heat exchange. Subcooling can effectively reduce the generation of flash gas (as can be seen from the pressure-enthalpy diagram, cooling from 3-3’ to the saturation liquid temperature further reduces the temperature; during the throttling process from 3’-4’, the fluid is initially in a liquid state before reaching the saturation liquid state, and this process reduces the amount of flash gas). ================================ Promotion campaign: Petrochemical sector – “Creative Ideas for Energy Savings” campaign (the second phase is currently in full swing) http://bbs.hcbbs.com/thread-1666758-1-1.html (Source: Haichuan Chemical Industry Forum) 2017 Coal Chemical Industry – “My Technical Upgrades” http://bbs.hcbbs.com/thread-1786290-1-1.html (Source: Haichuan Chemical Industry Forum)
A liquid whose temperature is below the freezing point but which does not solidify or crystallize is called a supercooled liquid. Supercooled liquid is unstable; the addition of just a small amount of crystals of this substance can trigger crystallization and raise the temperature of the supercooled liquid back to its freezing point.
A liquid whose temperature is below the freezing point but which does not solidify or crystallize is called a supercooled liquid. Supercooled liquid is unstable; the addition of just a small amount of crystals of this substance can trigger crystallization and raise the temperature of the supercooled liquid back to its freezing point.
A liquid whose temperature is below the freezing point but which does not solidify or crystallize is called a supercooled liquid. Supercooled liquid is unstable; the addition of just a small amount of crystals of this substance can trigger crystallization and raise the temperature of the supercooled liquid back to its freezing point.
Throttling to reduce pressure generates flashing gas, which enters the evaporator and affects heat exchange. Subcooling can effectively reduce the generation of flash gas (as can be seen from the pressure-enthalpy diagram, cooling from 3-3’ to the saturation liquid temperature further reduces the temperature; during the throttling process from 3’-4’, it starts in the liquid region before reaching the saturated liquid state, and this process reduces the amount of flash gas)
Throttling to reduce pressure generates flashing gas, which enters the evaporator and affects heat exchange. Subcooling can effectively reduce the generation of flash gas (as can be seen from the pressure-enthalpy diagram, cooling from 3-3’ to the saturation liquid temperature further reduces the temperature; during the throttling process from 3’-4’, it starts in the liquid region before reaching the saturated liquid state, and this process reduces the amount of flash gas)
I think subcooling and superheating are similar. Subcooling refers to the condition where, at a certain pressure, the temperature of the refrigerant is lower than its condensation temperature; this allows for a reduction in the gas phase and an improvement in heat exchange efficiency. I’m not quite familiar with pressure-enthalpy diagrams
Throttling to reduce pressure generates flashing gas, which enters the evaporator and affects heat exchange. Subcooling can effectively reduce the generation of flash gas (as can be seen from the pressure-enthalpy diagram, cooling from 3-3’ to the saturation liquid temperature further reduces the temperature; during the throttling process from 3’-4’, it starts in the liquid region before reaching the saturated liquid state, and this process reduces the amount of flash gas)
Throttling to reduce pressure generates flashing gas, which enters the evaporator and affects heat exchange. Subcooling can effectively reduce the generation of flash gas (as can be seen from the pressure-enthalpy diagram, cooling from 3-3’ to the saturation liquid temperature further reduces the temperature; during the throttling process from 3’-4’, it starts in the liquid region before reaching the saturated liquid state, and this process reduces the amount of flash gas)