ice storage in openstudio does not change results

asked 2017-08-15 15:33:59 -0600

hj630
41 ●1

updated 2017-08-16 08:33:02 -0600

Hi, I am trying to see the impact of ice storage. I added a ice storage in the chiller loop supply side, in parrallel to chiller. However, when I re run the model, it does not chagne the results compared to without ice storage. Is there any control I need to implement? Thanks image description

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I added a screenshot. I tried to put the ice storage in parrallel or in downstream of chiller but either case the results is the same as without ice storage. I wonder if there is anything else I need to put in there, such as setpoint

hj630 ( 2017-08-16 08:33:58 -0600 )edit

Dear @hj630 , I am working on a similar project with academic goals. Can you share your experience with Ice storage modeling with me?

Mehrdad Vojdani ( 2020-05-09 18:05:37 -0600 )edit

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answered 2017-08-16 07:35:59 -0600

Liam
174 ●1 ●6

I don't have much experience with ice storage in OS, but there are quite a few posts on this site for ice storage in both OS/EP. It may be helpful to insert a screenshot of your ice storage object in OS with the ice tank highlighted so all settings can be seen and people can comment/provide suggestions.

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thanks for your suggestions. I added it. I have read all the thread, a few are having the same problem as mine and have no solution.

hj630 ( 2017-08-16 10:38:57 -0600 )edit

Aha - most examples I see have the ice storage in parallel; you have it in series here. Unless control is setup properly, flow always goes through the chiller. Try adding in parallel.

Liam ( 2017-08-16 13:04:04 -0600 )edit

I tried the parrallel way too, do I just put the ice storage under the chiller? Or I added another chiller in parallel to the existing chiller and but the ice storage downstream? I see the E+ example file did it this way and only let one chiller one at the same time to represent one chiller with two chiller modeled.

hj630 ( 2017-08-17 08:27:34 -0600 )edit

I think you want one chiller and one tank, in parallel. Also - what are the units of tank capacity? Maybe its too small?

Liam ( 2017-08-19 06:59:45 -0600 )edit

I tried similar configuration with the E+ example file but the openstudio just wont turn on the ice storage. I put a CHW setpoint manager right after the chiller to make it produce low temp CHW (w/ glycol)to charge ice storage but it ignore the setpoint manager..

hj630 ( 2017-08-29 12:12:32 -0600 )edit

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