[TRNSYS-users] Help with two parallel ground loop heat exchangers simulation (Borehole and Horizontal Loop)

[Su Huang]

Dear All,[cid:9d9b1f70-cb4b-4c64-a737-11e5f0956170]

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I did one test with a simple GSHP system, in which one horizontal loop heat exchanger and vertical borehole heat exchanger connect in parallel with one water source heat pump.

I got a problem during the simulation. When the heat pump is not in operation (also the fluid flow rate in both ground loop heat exchangers are 0), the outlet temperature of the borehole is same as the inlet temperature of the borehole. But the outlet temperature of the horizontal loop is lower than the inlet temperature when the fluid flow rate in the pipe is 0. I cannot understand why there exists a temperature difference of the horizontal loop when the system is not in operation.

Much appreciated if anyone can help!

Many thanks! (Attached is the file).

Regards,
Su




________________________________
Su Huang

Ph.D Candidate in Sustainable Buildings Research Centre

University of Wollongong

Email: sh377 at uowmail.edu.au<mailto:sh377 at uowmail.edu.au>






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