[Equest-users] Ground Water/chilled water loop error(s)

[Kathryn Kerns]

I think you need to create 2 circulation loops: one loop is a lake/well circulation loop and the other is a chilled water loop. Create and attach a ground loop heat exchanger lake/well type to the lake/well loop. Create and attach a chiller heat pump type to the lake/well loop and the chilled water loop. The chiller heat pump type device will have energy coefficients of 1. That should do it.

I have used this system successfully with a 2 pipe circulation loop and I don't see why it wouldn't work with a chilled water loop.

 

 

 

Kathryn Kerns

Systems Specialist

BCE Engineers, Inc.

| Ph: 253.922.0446 | Fx: 253.922.0896 | 

 

 

________________________________

From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Travis Miller
Sent: Monday, October 17, 2011 2:45 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Ground Water/chilled water loop error(s)

 

Hello all:

 

I have a system that is using well water direct to the cooling coils (no heat exchanger to protect the cooling coils) at multiple air handlers in the building. I set it up with the condenser water loop tied to a ground water heat exchanger. This condenser loop then is tied to another heat exchanger on the chilled water loop to the coils.  This approach has given me an error on the condenser water loop that it has no design flow. I have been playing with the primary/secondary loop designations, even putting some made up flow values into the loops/pumps etc. but have had no luck. Any ideas?

 

I would like to eliminate heat exchangers all together and just model the 50° well water directly into the chilled water loop - any advice on how to do this? I already changed the effectiveness of the heat exchanger to 1.0. 

 

Thanks 

 

Travis Miller, PE

DC Engineering

123 W. Spruce St.

Missoula, MT 59802

P: (406)829-8828x209

F: (406)829-8829

 

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