[Equest-users] Exhaust Air Heat Recovery

[Paul Erickson]

Rick,

We typically model this sort of scenario outside of eQUEST as it won't do it for you.  We use hourly report values for loads/CFMs to determine the load balance and thus the operation of the heat pump chiller.  The challenge is getting a heat pump manufacturer to share performance curves with you.

Regards,
Paul

Paul Erickson  LEED(r) AP
Sustainable Practice Leader



AEI | AFFILIATED ENGINEERS, INC.
5802 Research Park Blvd. | Madison, WI  53719

P: 608.236.1112 | F: 608.238.2614
perickson at aeieng.com<mailto:perickson at aeieng.com>  |  www.aeieng.com<http://www.aeieng.com>



From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Routh Consulting Engineers
Sent: Monday, April 26, 2010 12:06 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Exhaust Air Heat Recovery

Does anyone have a suggestion on how to model a heat pump chiller with chilled water coils in zone exhaust airstreams that rejects its heat to a water loop to preheat incoming outside air to an air handling unit. The idea is to cool the exhaust airstreams from room temperature to say 50F, kind of normal chilled water cooling ranges for the exhaust side. The chiller needs to be able to make say 140F hot water for preheating use. My air handling systems are 100% outside air, it's an older laboratory building. The heat recovery chiller isn't appropriate because I don't have internal loads requiring mechanical cooling in the winter, the 100% outside air pretty much takes care of those. Any experience or suggestion anyone might have would be appreciated.

Regards,
Rick Routh
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