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

Thermostat setpoint at peak load is 0

asked 2015-04-24 15:36:09 -0600

updated 2017-05-03 19:10:34 -0600

I'm running the RefBldgHospitalNew2004_Chicago.idf example file on EnergyPlus v8.2-Update 1 and noticing that the HVAC Sizing Summary: Zone Cooling and Zone Heating: Thermostat Setpoint Temperature at Peak Load is 0 C.

image description

The hourly variables for Thermostat Cooling Setpoint Temperature and Thermostat Heating Setpoint Temperature are between 18 and 25 C.

I've noticed this in other models that I have run. Any ideas on why this value is 0?

edit retag flag offensive close merge delete


If you don't get a response here you might want to take this to the EnergyPlus helpdesk.

macumber gravatar image macumber  ( 2015-04-28 17:36:38 -0600 )edit

I have the same problem in some simulations!

Geraldo Pithon gravatar image Geraldo Pithon  ( 2015-04-29 20:28:18 -0600 )edit

my observation (or suspicion) is that sometimes a zero value is displayed as output when values are actually missing, e.g. in ResultsViewer.

OS-user-AT gravatar image OS-user-AT  ( 2015-07-17 13:13:26 -0600 )edit

1 Answer

Sort by ยป oldest newest most voted

answered 2015-07-22 18:08:31 -0600

updated 2015-08-23 06:20:06 -0600

This is a result of using ThermostatSetpoint:DualSetpoint. Since there are two set point temperatures, one for cooling and one for heating, the choice of which of those temperatures to use for reporting was never included (coded) such that this specific table had non-zero values. Change to the single cooling and heating set point (or cooling or heating only) type and you should see the non-zero data.

Here's a view of the table after correcting the problem: C:\fakepath\CorrectedZoneTempSP_HVACSumaryTable.jpg

edit flag offensive delete link more


@rraustad thanks for the answer! This one had been bugging me for a while.

Eric Ringold gravatar image Eric Ringold  ( 2015-07-22 18:17:58 -0600 )edit
rraustad gravatar image rraustad  ( 2015-07-27 08:43:06 -0600 )edit

Your Answer

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

Add Answer


Question Tools



Asked: 2015-04-24 15:36:09 -0600

Seen: 620 times

Last updated: Aug 23 '15