Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question
9

Thermostat setpoint at peak load is 0

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

jmcneill's avatar

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

__AmirRoth__'s avatar

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

Comments

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

macumber's avatar macumber  ( 2015-04-28 17:36:38 -0600 )edit

I have the same problem in some simulations!

Geraldo Pithon's avatar 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's avatar OS-user-AT  ( 2015-07-17 13:13:26 -0600 )edit
add a comment

1 Answer

Sort by ยป oldest newest most voted
11

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

rraustad's avatar

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

Jamie Bull's avatar

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

Comments

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

ericringold's avatar ericringold  ( 2015-07-22 18:17:58 -0600 )edit

Github issue #5048 https://github.com/NREL/EnergyPlus/is...

rraustad's avatar rraustad  ( 2015-07-27 08:43:06 -0600 )edit
add a comment

Your Answer

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

Add Answer

Training Workshops

Careers

Question Tools

3 followers

subscribe to rss feed

Stats

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

Seen: 741 times

Last updated: Aug 23 '15

About | Help | Privacy | Legal | Contact
Site design and logo: Copyright © 2015 Big Ladder Software LLC. All rights reserved.
The Unmet Hours and Big Ladder names and logos are trademarks of Big Ladder Software LLC.
User contributions licensed under the Creative Commons Attribution Share Alike 3.0 License.
Powered by