[Equest-users] Cooling Energy Consumption in Winter

[Keith Swartz]

Vamshi,

Something else to check is the economizer low limit. The default for many systems is to shut off the economizer and turn on a compressor whenever the outside temperature drops below 45F. To eliminate the low limit (to let the economizer operate no matter how cold it is outside), right click on the field and select "Restore Default."

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Keith Swartz, PE, BEMP, LEED AP
Senior Energy Engineer | Energy Center of Wisconsin | Madison.Chicago.Minneapolis
608.210.7123 | www.ecw.org<http://www.ecw.org/>

From: Nick Caton [mailto:ncaton at smithboucher.com]
Sent: Wednesday, June 12, 2013 2:27 PM
To: Sami, Vikram; John Aulbach; vamshi ranga; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Cooling Energy Consumption in Winter

Hi Vamshi,

Echoing the discussion so far, we can only guess with as little info as has been provided.  Are you trying to justify the results?  Do you perceive this behavior as a problem or unexpected?  Why?

Is the model exhibiting lots of unmet hours or showing any other signs that the modeled systems aren't operating correctly?

Assuming the model is set up correctly, reasons to expect such behavior may include any combination of:

*        Building is located in a climate where little/no heating is typically required in the winter (I also understand India includes tropical/monsoon climates with persistently warm winter months).

*        Building features substantial internal heat gains (people and equipment loads) leading to year-round cooling

*        Building envelope is very well (or perhaps overly well) insulated, holding internal heat gains in through the winter (and so requiring cooling instead of heating)

*        Building envelope by design invites excessive solar gains in the winter through glazing

*        Scheduling of select cooling equipment (such as a chiller) is forcing it to operate through hours where there is little-to-no demand

*        Buildings with occupied "core" spaces removed from the exterior envelope, and especially those with significant internal gains, should be expected to require year-round cooling where other spaces may require seasonal heating.

This isn't an exhaustive list by any stretch, but what comes to my mind first.  Hope this helps you to better define your problem (if there is one)!

~Nick


[cid:image001.jpg at 01CE680E.50F1AE50]

NICK CATON, P.E.
SENIOR ENGINEER

Smith & Boucher Engineers
25501 west valley parkway, suite 200
olathe, ks 66061
direct 913.344.0036
fax 913.345.0617
www.smithboucher.com

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Sami, Vikram
Sent: Wednesday, June 12, 2013 1:39 PM
To: John Aulbach; vamshi ranga; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Cooling Energy Consumption in Winter

Also - location - India is very generic. India is a large country with different weather patterns and climatic considerations depending on where you are. Depending on the location, and your building, cooling energy in winter might not be surprising.

Vikram Sami
Associate Partner



ZGF ARCHITECTS LLP
T 206.521.3509 E vikram.sami at zgf.com<mailto:vikram.sami at zgf.com>
925 Fourth Avenue, Suite 2400
Seattle, WA 98104


From: equest-users-bounces at lists.onebuilding.org<mailto:equest-users-bounces at lists.onebuilding.org> [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of John Aulbach
Sent: Wednesday, June 12, 2013 11:35 AM
To: vamshi ranga; equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Subject: Re: [Equest-users] Cooling Energy Consumption in Winter

Sir:

I believe we will need the .INP.p and .PD2 files. I am unfamiliar with Indian weather patterns.

John R. Aulbach

From: vamshi ranga <vamshiranga at gmail.com<mailto:vamshiranga at gmail.com>>
To: "equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>" <equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>>
Sent: Wednesday, June 12, 2013 8:13 AM
Subject: [Equest-users] Cooling Energy Consumption in Winter

Dear All,

I end up with getting cooling energy consumption in winter months and my heating energy comes negligible.

I am using "Packaged Single Zone system", Location - India. Can anyone tell the reason.

Thanks,
Vamshi.

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