Discussion: Circulating water supply and return water temperature
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This post was last edited by hesonchang214 on 2009-8-7 06:52. Under normal circumstances, the temperature of the circulating water supply should be lower than that of the return water. However, in our facility, the return water temperature has recently been lower than the supply water temperature. After checking the instruments, it was confirmed that this is indeed the case. The reason is that after leaving the system, the circulating water has no heat load to dissipate, so it returns directly to the circulation system. Due to the low ground temperature, the return water transfers its heat to the soil through the circulation pipes, which results in a decrease in the temperature of the return water. I just can’t figure out this result and the reason behind it; I hope someone who understands can help me out. Thank you.
This phenomenon is strange; I have never encountered it. Could you be more specific, such as the layout of the equipment and pipelines?
This post was last edited by hesonchang214 on 2009-8-7 06:52. You explained the reasons and consequences very clearly.
Hehe, dear sea friends, this afternoon I had the instrument’s thermometer removed and checked it; it turned out that the instrument was giving incorrect readings. Since the temperature underground is low, it should be able to absorb the heat from the return water, as well as the heat from the feed water. After being sent out, the circulating water feed exchanges heat with the heat load and then returns to the circulating water system; therefore, the feed water temperature is always lower than the return water temperature.