Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
2

Unmet heating and cooling hours question

asked 2018-05-08 14:06:43 -0500

Arch2010 gravatar image

updated 2018-05-08 22:46:56 -0500

I'm experimenting with energy modeling using Openstudio through Honeybee. I modeled a building and I used the ideal air load system. I got some unmet heating and cooling hours. Shouldn't an ideal air load system yield 0 unmet heating and cooling hours considering it is ideal (energy coming in the zone = energy going out of the zone)? Am I misunderstanding something here!

edit retag flag offensive close merge delete

Comments

@Arch2010 could you post a link to your model?

Avi gravatar imageAvi ( 2018-05-09 10:48:49 -0500 )edit

2 Answers

Sort by ยป oldest newest most voted
2

answered 2018-05-09 07:32:33 -0500

The ZoneHVAC:IdealLoadsAirSystem can also be used to model a real system. For "ideal" modeling make sure the inputs for Cooling Limit and Heating Limit are set to "NoLimit" and that the Cooling/Heating Availability Schedule input fields are blank (always available). If this still produces unmet hours, plot zone temp, zone set point temperature and unmet hours reports (then zoom in on a few days) to see when this is happening.

edit flag offensive delete link more

Comments

@rraustad, I didn't know that I have to set the cooling and heating limit to no limit. Thanks!

Arch2010 gravatar imageArch2010 ( 2018-05-13 14:49:43 -0500 )edit
-1

answered 2018-05-09 01:44:35 -0500

TomB gravatar image

Check the occupancy schedule versus HVAC schedule

edit flag offensive delete link more

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

 

Question Tools

1 follower

Stats

Asked: 2018-05-08 14:06:43 -0500

Seen: 58 times

Last updated: May 09