Overheating of the working fluid in the water ring vacuum pump
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Both the gas being pumped and C9, which serves as the working fluid, have a temperature of around 30°C before entering the vacuum pump system. Why does their temperature rise to nearly 70°C after entering the liquid ring vacuum pump to function as a circulating fluid? Please explain
The water ring vacuum pump, also known as a water ring compressor, compresses gases and does work; as a result, the temperature rises. The circulating fluid is also heated due to intense mixing, which is why it needs to be cooled to below its bubble point temperature at the inlet pressure. I’m not sure if the answer is satisfactory; please let me know
How can artificial means be used to lower the temperature of the working fluid a bit, without having a significant impact on the system’s vacuum level?
The impact is very significant; it is necessary to add a Lengning easy-flow tank
It mainly affects vacuum level, as well as causing environmental pollution
If possible, the circulating liquid can be replaced by continuously adding fresh water to the gas-liquid separation tank and draining the old liquid out, thereby lowering the temperature of the gas-liquid separation tank first. This approach will work to some extent. It is also best to treat the heat exchangers of the unit in order to find out the reasons for the decrease in their heat exchange capacity.
The method on the seventh floor is correct! Do it as instructed.
Keep the working fluid in circulation, continuously adding new fluid while also removing it through the overflow port. Some water ring vacuum pumps are equipped with coolers, which must be turned on to cool the working fluid.
1) The specific heat of C9 is much lower than that of water； 2) When using C9 as the working fluid, it is necessary to recover part of the condensation that occurs during the process (the latent heat of condensation is relatively high). If the flow rate remains similar to that when water is used as the working fluid, with an inlet temperature of 30 degrees and an outlet temperature of over 70 degrees, this is quite possible ； 3) Solution: By adding another working fluid circulation pump to increase the flow rate of the working fluid, it is possible to reduce the outlet temperature ； But it must not exceed the maximum allowable flow rate of the working fluid ； 4) Note: Increasing the flow rate of the working fluid may lead to an increase in shaft power.
When a water ring pump is in operation, it does work on the liquid ring, generating heat; if this process is repeated, more and more heat is accumulated, leading to an increase in the temperature of the working fluid. To achieve a closed-loop circulation of the working fluid in modern liquid ring pumps, a heat exchanger must be installed before the fluid enters the pump in order to lower its temperature.