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

Get started with the Help page

0

Chiller Evaporator Cooling Rate

asked 2023-08-16 02:21:55 -0600

Om
49 ●6

updated 2023-08-16 09:12:10 -0600

flag of United States of America

14250 ●86 ●24 http://bigladdersoftware.com/

Hi,

I model a building in OpenStudio and try to compare the hourly chiller evaporator cooling rates between actual and modeled chillers. It seems like the modeled outputs have jumping values during the first hours as shown in the chart. I use the OS:Chiller:Electric:EIR class to model the chillers. I am not sure whether this is common or it's an error from my inputs. Could anyone please recommend some methods to deal with these first-hour spikes?

Thank you.

image description

edit retag flag offensive close merge delete

1 Answer

Sort by » oldest newest most voted

1

answered 2023-08-16 11:29:22 -0600

flag of Colombia

1414 ●14 ●13 https://www.linkedin.c...

It seems to me that there is a thermal inertia at the beginner of each day in the modeled chiller. The modeled chiller has to work more to overcome this load and then cooling demand it is less than the Actual one.

It could be interesting if the area under the curve (cooling energy) of each case is the same.

edit flag offensive delete link

Your Answer

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

Training Workshops

Careers

Question Tools

1 follower

Stats

Asked: 2023-08-16 02:21:55 -0600

Seen: 75 times

Last updated: Aug 16 '23

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