[Equest-users] Excessive pumping power consumption

zhaoyongqing1987 zhaoyongqing1987 at 126.com
Wed Dec 4 19:05:05 PST 2013


you can set pump schedule in chilled water loop to force pump running as per building operating hours .

yongqing zhao

At 2013-12-04 05:12:08,"John Aulbach" <jra_sac at yahoo.com> wrote:

Then there is a cooling load that is not shutting off. A space on 24/7? Send the .INP and .PD2. And version number. Not all of us have gone to 3.65.
 
John


From: Javed Iqbal <eee.javed at gmail.com>
To: John Aulbach <jra_sac at yahoo.com>
Cc: equest-users <equest-users at lists.onebuilding.org>
Sent: Tuesday, December 3, 2013 1:08 PM
Subject: Re: [Equest-users] Excessive pumping power consumption



Yes, All the chilled water loop operation is on demand. As such there is no heating so all the problem is on chilled water pump.


Thanks!!



On Tue, Dec 3, 2013 at 4:01 PM, John Aulbach <jra_sac at yahoo.com> wrote:

Javel:
 
Did you put the entity (chiller, boiler) that the pump is serving on DEMAND? Otherwise, the pump will never stop.
 
John R. Aulbach, PE


From: Javed Iqbal <eee.javed at gmail.com>
To: equest-users <equest-users at lists.onebuilding.org>
Sent: Tuesday, December 3, 2013 12:58 PM
Subject: [Equest-users] Excessive pumping power consumption



Dear All,


I'm simulating a large commercial building for LEED compliance. There i am facing a major issue in pumping power annual consumption. The proposed case pumping power is almost 7 times higher than the ASHRAE baseline case which  has great impact on my overall anticipated savings. I've generated hourly report to see the pump operations power and found propose case pump is running all year round whereas baseline is running as per building operating hours. I've thoroughly checked all the schedules assigned and it seems fine to me. My gut feeling is there is some load which is driving the pump to run throughout the year. I would appreciate if someone can give expert advice to troubleshoot this.




Thanks in Advance!!


--





Javed Iqbal, LEED AP, CEA
Sr. Energy Analyst 












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--





Javed Iqbal, LEED AP, CEA
Sr. Energy Analyst 











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