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Heating Electricity (J) output less than the sum of the contributing parts

asked 2018-10-21 15:17:39 -0500

sirikhsand's avatar

updated 2018-10-22 08:07:09 -0500

Hi everyone,

I am trying to figure out what contributes to the Heating:Electricity output. I have looked at .mtd output file and I can see that the following contributes to the Heating:Electricity:

Heating Coil Electric Energy [J] Heating Coil Defrost Electric Energy [J] Heating Coil Crankcase Heater Electric Energy [J] Heating Coil Electric Energy [J] (Supplementary)

However, when I look at the output the addition of all of these, it is much greater than the Heating:Electricity output. Everything is in the same units and timestep. Does anyone know why the heating is less than the sum what contributes to it? What am I doing wrong?

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I ran a quick test with one of the heat pump example files and the meter agrees with the components. Please share the idf file either here or e-mail it to

MJWitte's avatar MJWitte  ( 2018-10-23 07:37:02 -0500 )edit

Hi MJWitte,

I have sent the idf file via email.

The model was created by someone else and I am checking that I can use it for my purposes. I am also having an issue where the temperature is flat while the HVAC is on, and I am trying to figure out why that is happening/the calculation behind it while heating energy dwindles away. I have attached a spreadsheet (sent via email) with some graphs.

I would appreciate any insight into this problem.

Thanks in advance, Sandi

sirikhsand's avatar sirikhsand  ( 2018-10-23 14:44:52 -0500 )edit

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answered 2018-11-06 16:59:08 -0500

Based on the idf file sent to the helpdesk, the components outputs listed in the mtd output for "Heating:Electricity" sum to the same value as the Heating Electricity reported in the Annual Building Utility Performance Summary. So it appears to be working correctly.

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ref: helpdesk ticket 13088

MJWitte's avatar MJWitte  ( 2018-11-06 16:59:34 -0500 )edit

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Asked: 2018-10-21 15:17:39 -0500

Seen: 113 times

Last updated: Nov 06 '18