Question-and-Answer Resource for the Building Energy Modeling Community

Zone Cooling Design Supply Air Temperature Input Method

asked 2015-04-17 15:11:35 -0500

Yan
1181 ●3 ●14 https://www.linkedin.c...

Hi, all

I would like to size the system design supply airflow rates for my baseline case based on a supply-air-to-room-air difference (ASHRAE90.1 requirement). I think in EnergyPlus, it is realized by choosing "Temperature Difference" in the "Zone Cooling Design Supply Air Temperature Input Method" under "Sizing:Zone" section. Is it corret? If so, is there any similar function in OpenStudio? I didn't find the related function in OpenStudio.

Yan

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2015-04-18 17:01:11 -0500

MatthewSteen

10077 ●18 ●25 https://www.nrel.gov/b...

updated 2015-04-18 17:39:58 -0500

You're correct, the EP object to do this is Sizing:Zone. However, as of OS 1.7.0 the Zone Cooling/Heating Design Supply Air Temperature Input Method field is not available in the App or the SDK and uses the default SupplyAirTemperature choice.

These inputs are available in the OS App via Thermal Zones tab > Cooling Sizing Parameters and Heating Sizing Paramters buttons. I set these values to +/- 20F of the zone setpoint temperature to comply with 90.1 Appendix G.

image description

edit flag offensive delete link

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

Careers

Question Tools

2 followers

Stats

Asked: 2015-04-17 15:11:35 -0500

Seen: 1,025 times

Last updated: Apr 18 '15

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.

Zone Cooling Design Supply Air Temperature Input Method edit