[Equest-users] Strange Winter Cooling with Chiller

[Michael Andelman]

Check your chilled water loop operation.  The default is standby, so your
loop is running 24/7.  Pump energy is often enough of a load to the loop to
require the chillers to cycle on.

 

Mike

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Carol
Gardner
Sent: Tuesday, August 31, 2010 12:26 PM
To: Chris Jones
Cc: Equest User
Subject: Re: [Equest-users] Strange Winter Cooling with Chiller

 

I wonder if the electric loads are associated with pumps for your chilled
water system? I'd Google eQUEST reports to see if Marlin or others have
written about this. I suspect that it's just an auxiliary load associated
with moving the chilled water, or cooling tower fans, that you needn't worry
about.

Let us know what you find out.

Carol

On Tue, Aug 31, 2010 at 9:17 AM, Chris Jones <cj at enersave.ca> wrote:

Check the LOOP-OPERATION - STANDBY, DEMAND-ONLY, SNAP.
With STANDBY you may see electrical consumption when no system has a load.

At 08:12 AM 31/08/2010, YinRic wrote:

Hi All,

Have you happened to meet problem with strange cooling in winter when you
choose chiller as cooling source?

I have a typical 2-storey office building (with no extraordinary internal
cooling load) modelled using eQuest. Whenever I choose "chilled water coils"
as cooling source, some cooling energy appears in the "Electric Consumption"
graph for Jan and Feb, although the SS-I report indicates no sensible or
latent cooling energy in these two months. When I change the cooling source
into "DX Coils", the cooling energy in winter simply disappeared.

Attempting to fix the problem, in the "air-side system" window under wizard
mode, all I used are default values to avoid wrong inputs, and I chose "no
heating" in winter, but the problem still exist.

This is a LEED project approaching deadline. If anyone could help me out,
that would be greatly appreciated.

Thanks,
Rick, LEED AP
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Chris Jones
14 Oneida Avenue
Toronto, ON M5J 2E3.
Tel.  416-203-7465
Fax. 416-946-1005


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-- 
Carol Gardner PE

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