[Equest-users] 회신: I need to get help to "Cooling Setpoint Control: OA Reset" (urgent)!

허정숙 jasmine.hue at lge.com
Tue Jan 14 19:21:22 PST 2014


Dear 

 

Thanks. I am wondering if chiller itself energy saving with using OA reset
control. I was more expecting more like 3% (only for chiller itself energy
saving) with and without using the control, but it is less than 1%.. As
information reveals that chilled water temperature set point reset control
will save about 2% per degree Fahrenheit. I am not sure if my simulation is
correct. 

 

Also, wondering if you ever have done with set-temperature reset control
according to space load (as load varies - time variable) with eQuest.
Thanks very much 

Cheers 

 

 

보낸 사람: Jeon, MiYoung [mailto:MiYoung.Jeon at tetratech.com] 
보낸 날짜: Wednesday, January 15, 2014 11:29 AM
받는 사람: 허정숙; equest-users at lists.onebuilding.org
제목: RE: [Equest-users] I need to get help to "Cooling Setpoint Control:
OA Reset" (urgent)!

 

Energy saving from OA-reset control depends on the design values and
weather data.

If you model OA-reset control, electric consumption for the space cool,
heat rejection and pump & fan will be reduced. 

I just ran a test to inform you the effects of OA-reset and as a result, an
electric consumption saving is 2 %.

This is just one of various cases. In order to get a precise result, you
should predict the saving using the hourly report and  weather data as well.

 

Thank you.

 

Miyoung Jeon  LEED AP BD+C| Modeling Engineer

Direct: +82.2.2051.5097 | Fax: +82.070.4170.4101 | mjeon at cosentini.com

 

Tetra Tech International Korea Inc. | Cosentini 

3F Dongyoung Bldg. 891-62 Daechi4-Dong Gangnam-Gu | Seoul, Korea 135-840 |
http://www.cosentini.com/korea.html

 

From: 허정숙 [mailto:jasmine.hue at lge.com] 
Sent: Wednesday, January 15, 2014 10:23 AM
To: Jeon, MiYoung; equest-users at lists.onebuilding.org
Subject: 회신: [Equest-users] I need to get help to "Cooling Setpoint
Control: OA Reset" (urgent)!

 

Thanks for your reply 

I already tried this but my problem is not that the result is not much of
what I expected.. not much saving from this OA rest control. I am wondering
if I did it in a correct way

 

보낸 사람: Jeon, MiYoung [mailto:MiYoung.Jeon at tetratech.com] 
보낸 날짜: Wednesday, January 15, 2014 9:58 AM
받는 사람: 허정숙; equest-users at lists.onebuilding.org
제목: RE: [Equest-users] I need to get help to "Cooling Setpoint Control:
OA Reset" (urgent)!

 

Dear Jasmine,

 

You can model ‘OA Reset Set-point control’ using chilled water loop’s
controls. 

There are four control sequences. (Fixed, OA-reset, Scheduled, Load-reset)

See the picture below. If you need help, feel free to contact me.

 

Thank you.

 

cid:image003.jpg at 01CF11D7.535D0680

 

 

Miyoung Jeon  LEED AP BD+C| Modeling Engineer

Direct: +82.2.2051.5097 | Fax: +82.070.4170.4101 | mjeon at cosentini.com

 

Tetra Tech International Korea Inc. | Cosentini 

3F Dongyoung Bldg. 891-62 Daechi4-Dong Gangnam-Gu | Seoul, Korea 135-840 |
http://www.cosentini.com/korea.html

 

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-
bounces at lists.onebuilding.org] On Behalf Of 허정숙
Sent: Wednesday, January 15, 2014 8:26 AM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] I need to get help to "Cooling Setpoint Control: OA
Reset" (urgent)!

 

Dear eQuest expert, 

 

Is there anyone who have experienced with modeling the chilled water supply
reset according to “OA Reset Set-point control” in Cooling? In other
words, chilled water supply temperature will be changeable according to OA
temperature (Lower OA temp, high chilled water supply temp). Can you help
me out on how to set up the model in order for this to be working
successfully. 

 

I really need to model this as accurate as possible. Your help would be
greatly appreciative. Thanks so much for your help in advance. Cheers  

 

 

 

허정숙 과장 (Jasmine Hue), LEED AP, CEM 

Manager, BdMS Product Planning Group 

BdMS Business Unit/ AE/ LGE

jasmine.hue at lge.com

M: (+82)-10-3576-6194

T: (+82)-2-3777-2896

보안문구

 

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