Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
@pflaumingo I can confirm that I've been seeing similar results. when I change my VRF systems to EvaporativelyCooled I see a penalty for fan, cooling and heating electric energy over the year.
I have also been experiencing similar results with the water cooled variation of VRF systems in E+. The simulation is occurring in Atlanta and I'm controlling the condenser loop to float between 40F and 90F using a cooling tower and boiler.
@rraustad I believe the file you performed your test on did not heat recovery enabled. Correct? Have you performed tests on a VRF system with heat recovery enabled? I have heat recovery enabled for my tests.
My suspicion is that E+ is penalizing moderate condenser temperatures when heat recovery is enabled for some reason. This is a counter intuitive result based on my understanding of how VRF systems work.
| | 2 | No.2 Revision |
@pflaumingo I can confirm that I've been seeing similar results. when I change my VRF systems to EvaporativelyCooled I see a penalty for fan, cooling and heating electric energy over the year.
I have also been experiencing similar results with the water cooled variation of VRF systems in E+. The simulation is occurring in Atlanta and I'm controlling the condenser loop to float between 40F and 90F using a cooling tower and boiler.
@rraustad I believe the file you performed your test on did not have heat recovery enabled. Correct? Have you performed tests on a VRF system with heat recovery enabled? I have heat recovery enabled for my tests.
My suspicion is that E+ is penalizing moderate condenser temperatures when heat recovery is enabled for some reason. This is a counter intuitive result based on my understanding of how VRF systems work.
