HeatPump:PlantLoop:EIR:Heating adding heat to source loop instead of removing

[rmcclung]

The HeatPump:PlantLoo:EIR:Heating adds heat to the source loop instead of removing it. The output variable "Heat Pump Source Side Outlet Temperature" is reporting the correct temperature, being lower than the inlet temperature. But the "System Node Temperature" for the same node is source heat pump inlet temperature plus the temp difference, not minus the temp difference. And the source loop is behaving as it is seeing the higher temperature, with heat added, not the lower temperature, with heat removed.

Also, not shown in this file, but having multiple, parallel heat pump objects, all branches request flow when unnecessary
Next 42 Results GSHP3b bug report.txt

[mitchute]

It looks like the energy is flowing in the right direction for both heating and cooling. The first plot is for the example file from Jan 1-7 using the Chicago EPW; the second is for July 1-7.

I'm going to close this, but reopen feel free to reopen if the issue can be replicated.

[rmcclung]

The heating reported was not the problem, it’s the temperature coming out of the condenser, one variable is reporting the correct number, but the other variable is not. And the condesnor loop is behaving as though the wrong temperature is coming out. The heat pump is effectively heating both the building and the ground source. From: Matt Mitchell <[email protected]> Sent: Wednesday, September 23, 2020 8:53 AM To: NREL/EnergyPlus <[email protected]> Cc: Ruth McClung <[email protected]>; Author <[email protected]> Subject: Re: [NREL/EnergyPlus] HeatPump:PlantLoop:EIR:Heating adding heat to source loop instead of removing (#8147) It looks like the energy is flowing in the right direction for both heating and cooling. The first plot is for the example file from Jan 1-7 using the Chicago EPW; the second is for July 1-7. [Screen Shot 2020-09-23 at 9 48 43 AM]<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fuser-images.githubusercontent.com%2F2985979%2F94036920-0cc47980-fd82-11ea-9279-d8c0a7d509cf.png&data=02%7C01%7Crmcclung%40morrisonhershfield.com%7C04a0558dd72e490f80a008d85fd8b57a%7Cb63667b94c0f4ac6ae6ef4973407857c%7C0%7C0%7C637364731672444301&sdata=0kIp0P%2FRdmfUIr7Sk4ZLZumF44JzRLQ8OxiaZhC496Y%3D&reserved=0> [Screen Shot 2020-09-23 at 9 48 54 AM]<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fuser-images.githubusercontent.com%2F2985979%2F94036930-10f09700-fd82-11ea-8484-dfeb8a308bca.png&data=02%7C01%7Crmcclung%40morrisonhershfield.com%7C04a0558dd72e490f80a008d85fd8b57a%7Cb63667b94c0f4ac6ae6ef4973407857c%7C0%7C0%7C637364731672444301&sdata=xCRY%2BehxcQ33ESzas0czRq9zggxXx2hZoxuy9ZeI%2BiQ%3D&reserved=0> I'm going to close this, but reopen feel free to reopen if the issue can be replicated. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FNREL%2FEnergyPlus%2Fissues%2F8147%23issuecomment-697583594&data=02%7C01%7Crmcclung%40morrisonhershfield.com%7C04a0558dd72e490f80a008d85fd8b57a%7Cb63667b94c0f4ac6ae6ef4973407857c%7C0%7C0%7C637364731672454295&sdata=VIXsGNQ5EdWdEz5QBJJOhmQZrsjJTRHXjAVGuL93oUs%3D&reserved=0>, or unsubscribe<https://can01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fnotifications%2Funsubscribe-auth%2FAE7WN7KD2MPUJRMW3I6W5G3SHIKUVANCNFSM4OWXV2JA&data=02%7C01%7Crmcclung%40morrisonhershfield.com%7C04a0558dd72e490f80a008d85fd8b57a%7Cb63667b94c0f4ac6ae6ef4973407857c%7C0%7C0%7C637364731672454295&sdata=ussP4mIjg2iIraSqhQcHw%2BMvlakLBY0vfSgoVFqTzms%3D&reserved=0>.

[mitchute]

OK, I see it now. Sorry about that. I'll reopen while we investigate this.

[mitchute]

Is it Friday yet...? This previous plot is for the load side, which is not what you asked about. That does look OK.

From the HP Source Side report variables, the temps look OK.

System node temps for the condenser nodes on the heating side also look OK. These are consistent with the HP report variables.

The cooling side looks like it needs a fix. There's no flow rate, but the condenser inlet temperature is somehow not getting passed through to the outlet.

@rmcclung are there other node temperatures that you're concerned with?

[rmcclung]

Strange that the cooling side is misbehaving for you, when I run it with the Vancouver (Canada) weather file, the heating condenser side is what's showing the wrong behavior and the chiller condenser is fine. (although when there is no flow the inlet does keep updating temp while the outlet stays on the last reported temp when there was flow...which I see a lot for plant temps anyway and is pretty inconsequential)

That probably means there something wrong in both places

It probably

[mitchute]

Thanks, @rmcclung. I'll test with Vancouver.

[mitchute]

@rmcclung which version of E+ are you using? I fixed the issue you mention regarding the outlet temp not tracking the inlet temp in #8072. That will be available in the upcoming release due at the end of the month. I don't think that explains your original question, but it does make me wonder why the chiller condenser temps aren't tracking.

[rmcclung]

9.3.0