I want to know the power required by a building in EnergyPlus but I do not know which output should I use

asked 2019-10-04 07:18:47 -0500

mayks's avatar

updated 2019-10-10 10:35:21 -0500

I'm simulating a small room in Denmark and I'm going to add a heat pump system as well as PCM. To know the nominal capacity of the heat pump system i want to know first the power required by the building. Does anyone which output shoul I use?

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I don't know if I understood you well, but you can simulate your room with an ideal heating system, where you only define the heating setpoint as well as a schedule for it. As an output you'll choose Ideal system heating rate. This is of course an ideal system and gives you an approximate under perfect conditions.

Roccan's avatar Roccan  ( 2019-10-04 12:03:49 -0500 )edit

Hi! Thank you for answering. But I still do not understand how to introduce an ideal heat pump. I do not know anyone who can help me and I’m a little bit overwhelmed. When I simulate the heating setpoint (20-25) the system can not resch those temperatures and somehow change the setpoints to 16.

mayks's avatar mayks  ( 2019-10-07 02:09:07 -0500 )edit

Ok, try using the object ZoneHVAC:IdealLoadsAIrSystem. There you'll define some basic parameters of the ideal system as well as an availability schedule. If you look in the example files as well as in the Input/Output Reference, you should get a good idea of how it works. In order to control the ideal system, you will also need a Thermostat. There are different ways on how you can model this. The simplest would be to set a constant heating and/or cooling setpoint, or you can define it via schedule. Hope this helps.

Roccan's avatar Roccan  ( 2019-10-08 10:01:08 -0500 )edit