[Bldg-sim] ERV with increasing cooling load

[eric wang]

Hi,
 
Thanks a lot for all your replies. I changed the following settings and solved the problem.
 
Control Sequences Operation: when minimum OA 
Make air temperature cotrol: Mixed Air Reset
 
Best,
 
Shaojie

--- On Tue, 10/28/08, Kingsley, Michael L. <MICHAEL.L.KINGSLEY at saic.com> wrote:

From: Kingsley, Michael L. <MICHAEL.L.KINGSLEY at saic.com>
Subject: RE: [Bldg-sim] ERV with increasing cooling load
To: shaojieworld2006 at yahoo.com, bldg-sim at lists.onebuilding.org
Date: Tuesday, October 28, 2008, 8:09 AM

Shaojie,

Check to make sure that you are not recovering heat during hours that
you can be using the economizer.  Choose the Control Sequences:
Operation: "When Minimum OA" so that the heat recovery device will
only
operate when you cannot benefit from free cooling.

Mike

Michael L. Kingsley, PhD, PE, LEED AP
Senior Engineer/ Project Manager
SAIC
6390 Fly Road
East Syracuse, New York 13057
Phone:  (315) 437-1869  x205
Cell:     (315) 373-4081
Fax:     (315) 437-1866
Email:  kingsleym at saic.com

-----Original Message-----
From: bldg-sim-bounces at lists.onebuilding.org
[mailto:bldg-sim-bounces at lists.onebuilding.org] On Behalf Of eric wang
Sent: Monday, October 27, 2008 11:32 PM
To: bldg-sim at lists.onebuilding.org
Subject: [Bldg-sim] ERV with increasing cooling load

Hi,
 
I model a PSZ system with exhaust air heat recovery. I set the static
pressures of supply/exhaust fans as zero in ERV tab. Therefore, the fan
energy is the same with or without ERV. However, there is an increasing
cooling load in the cooling model. I changed the hourly report and
didn't find the reason. Any suggestions are highly appreciated.
 
Thanks
 
Shaojie 




      
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