avril14's profile - activity

Limit Heat Exchanger Approach Temp I'm modeling a Fluid-to-Fluid HX as an integrated waterside economizer, and in operat

Waterside Economizer, Chillers Not Turning On I'm having the opposite problem of a lot of the other posts I've seen. My

I'm getting thousands of the same warning and it's actually crashing my model without any errors.

* Warning * MapShadeDeploymentOrderToLoopNumber: found empty map for window in zone LO2 OFFICEW5 THERMALZONE

I'm not sure what this is referring to, any suggestions on how to fix it? Thanks!

Hm ok, I tried to assign multiple shading controls to the same zone so that's probably what's doing it. I'll try to simp

MapShadeDeployment Warning I'm getting thousands of the same warning and it's actually crashing my model without any err

Wrap Around Coil Controls Has anyone ever modeled a wrap around coil in Open Studio? My AHU set up looks like this with

I'm trying to generate a biquadratic curve for a heat pump water heater (HPWH Heating Cap Function Temp). In the EnergyPlus CurveFitTool the INPUT tab asks for Indoor Air Dry-Bulb Temperature and Outdoor Air Dry-Bulb Temperature as the independent variables. Obviously Indoor Air Dry-Bulb Temp doesn't make sense in this case, can I just use the EWT? Or should it be something else?

When I use the values I have all the coefficients are zero, but I'm wondering if it's because I have too many constant values? If anyone has any suggestions I'd really appreciate it. Thanks!

@justinshultz I think I did eventually figure out the issue here with some help from a colleague. The spreadsheet is cal

Biquadratic Curves for HPWH I'm trying to generate a biquadratic curve for a heat pump water heater (HPWH Heating Cap Fu

Curve Fit Tool Independent Variables I'm trying to generate a biquadratic curve for a heat pump water heater (HPWH Heati

That was referring to another Unmet Hours post I had seen, I wasn't having that issue. There is no boiler in my model, t

That was referring to another Unmet Hours post I had seen, I wasn't having that issue. There is no boiler in my model, t

I removed the DOAS system and the cooling and heating energy jumped way up. Which makes it seem like the VRF does take i

I had this same issue and this video was helpful in fixing the surfaces which were oriented the wrong way: https://www.y

I have a water-cooled VRF system with DOAS set up in Energy Plus. The condenser loop is a ground loop. The VRF is set to autosize, but it isn't meeting the heating loads for the building. I've seen a few other posts with similar issues, where the condenser loop gets too cold and the VRF shuts off, but that doesn't seem to be happening here. It looks like there is always flow in the VRF system, just not enough. I've tried hard sizing the flow but I'm still not getting enough heating capacity and the DOAS is overcompensating. If anyone has any insights I would really appreciate it. IDF file is here. Thanks!

You're right, the DOAS was the issue. I intended for the DOAS to provide all ventilation but did not set the OA in the V

Water-Cooled VRF Not Meeting Heating Load I have a water-cooled VRF system with DOAS set up in Energy Plus. The condense

I tried testing a few things and it seems like you're right. Thank you! Now I'll just have to figure out what's wrong wi

The equipment is in the right order but it's still using the DOAS first. I think because of the order of the plant loops

Water-Cooled VRF Priority I managed to set up a water-cooled VRF system in Open Studio, but I'm having a problem with th

I managed to figure this out eventually. For anyone else having the same issue, I made a few changes but I think what ul

I tried hard sizing the heat pump but that didn't have any effect. You can take a look at the file here if you have any

GSHP with Radiant, no flow in radiant loop I'm modeling a GSHP loop, with secondary loops for radiant heating and coolin

GSHP with Radiant, no flow in radiant loop I'm modeling a GSHP loop, with secondary loops for radiant heating and coolin

This issue sounds very similar to what's happening with my model, but it looks like this was resolved. https://github.co

Central Heat Pump System Object is Crashing Measure Manager When I add a central heat pump system to my model the measur

I'm assuming that's the problem because it's being used in all three loops and none of them are working. There is no DHW

Water-to-Water Heat Pump Component Not Working I'm modeling a GSHP loop, with secondary loops for radiant heating and co