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CentralHeatPump Not Always Recording Electricity Consumption

asked 2018-11-07 17:50:09 -0600

Lindsey Gaunt gravatar image

updated 2018-11-08 08:39:11 -0600

My model includes a CentralHeatPump (CHP) system acting as a heat recovery chiller. It is attached to a secondary supply loop on the chilled water (CHW) and hot water (HW) supply side and the demand side of the condenser water (CW) loop. Looking at hourly data, everything seems to operate fine; for example, the CHP is meeting what it can of the CHW load and rejecting heat to the hot water loop when there is a request for it, otherwise it rejects heat to the condenser water loop.

The issue I'm having is while it is meeting these CHW/HW loads, it does not always record electricity consumption. Therefore the annual cooling/heating electricity consumption is not accurately reflecting the work done by the system.

I'm thinking this is a bug in the object but any help you can give would be greatly appreciated!

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You should send your input file to so they can review the results and give a detailed answer on this problem.

rraustad gravatar image rraustad  ( 2018-11-07 21:27:09 -0600 )edit

reference helpdesk ticket 13106

MJWitte gravatar image MJWitte  ( 2018-11-15 14:25:21 -0600 )edit

Is there any solution for this issue?

s_pourm gravatar image s_pourm  ( 2018-11-30 14:09:44 -0600 )edit

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answered 2018-12-04 14:01:39 -0600

This is not the intended application for CentralHeatPumpSystem. Suggest using Chiller:Electric:EIR with heat recovery connections. (You may need to give it a condenser loop that never runs.) Or use HeatPump:WaterToWater:EquationFit:Cooling.

Repeating here suggestions from helpdesk ticket.

Adding this to open issue #5904.

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Asked: 2018-11-07 17:50:09 -0600

Seen: 164 times

Last updated: Dec 04 '18