How to use a WaterHeater:HeatPump in OS ?

asked 2016-04-12 03:28:48 -0500

Urado gravatar image

updated 2016-04-12 03:48:21 -0500

I have spent a lot of time trying to use the WaterHeater:HeatPump in OS but I always have a problem with heat loads. First I used a standard boiler (which works perfectly) and then I followed @Kyle Benne instructions to use this component instead.

However, this post (see @Archmage's answer) shows there are significant differences between the two systems. My problem is similar but I can't figure exactly what I have to add and where. I tried to add at least a HeatExchanger:FluidToFluid but It caused node problems... I think I need some help to understand this component before doing more tests.

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What's the manifestation of your problem? And have you autosized your waterheater:mixed? OS is missing the WaterHeater:Sizing objects, so don't

Julien Marrec gravatar image Julien Marrec  ( 2016-04-12 07:28:51 -0500 )edit

Same problem that the post I linked in my question : no heat provided to my loop. I have two parameters autosized in waterheater:mixed : use and source side design flow rate. It could be the problem... I have to test this.

Edit : same problem if I hard sized these two parameters !

Urado gravatar image Urado  ( 2016-04-12 07:39:56 -0500 )edit

Make sure the heat pump is connected to the loop and the control is setup correctly. Refer to the input out reference of energyplus is any fields are not clear.

BL gravatar image BL  ( 2016-04-12 08:04:22 -0500 )edit

@Bo_Lin The waterheater:heatpump is a zonal object, it is defined in my thermal zone and connected to the hot water loop through the waterheater:mixed (water tank). For the control, I use the same configuration I used for a standard boiler, which works perfectly. This posts seems to show that I have to add some objects such as a HeatExchanger:FluidToFluid so I need some clarifications.

Urado gravatar image Urado  ( 2016-04-12 08:14:55 -0500 )edit