[Equest-users] WTWHP with ERU 100% OA and WSHP

[Bosch, Crina]

I tried the first  system described below yesterday and I didn't have
any luck until now to work the way it's supposed to. 

I will try today again the first system and then  try the second one and
see. 

Thank you for all your inputs and help. 

 

Crina Bosch
Engineer, Mechanical

 

From: Karen Walkerman [mailto:kwalkerman at gmail.com] 
Sent: Wednesday, August 03, 2011 12:08 PM
To: Kathryn Kerns
Cc: Bosch, Crina; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] WTWHP with ERU 100% OA and WSHP

 

I have not found it possible to create this type if system in eQuest.
Use of a DOA system with an energy recovery ventilator is problematic
even without the WTWHP.  What I have done is create an energy recovery
ventilator for each zone, and adjust the COP and capacities of the zone
heat pumps to account for the additional capacity and different
efficiency of the WTWHP unit.

 

I have had no real luck with WTWHP's in eQuest, and I don't know of
anyone who has used them successfully.

 

The system you describe can be created in EnergyPlus (though not
easily).

 

--

Karen

 

On Wed, Aug 3, 2011 at 11:38 AM, Kathryn Kerns
<kathryn.kerns at bceengineers.com> wrote:

Crina, what I have done in the past that is similar is:

1. in the Wizard, model your DOAs as hydronic chilled water and hot
water units and the rest of your units as WSHPs

2. in Detailed Edit, add a 2-pipe loop, a heat pump chiller, a ground
source heat exchanger loop, and a lake/well ground source heat
exchanger.

3. In Detailed Edit, convert the DOA coils to the 2 pipe loop and remove
the chilled water and hot water system.

 

That should leave you with a WSHP system and a ground loop WTWHP system.
If you want to attach the WTWHPs to the WSHP loop, look up the eQuest
literature on the Heat Pump Chiller option and see if there is a way to
do this.

 

________________________________

From: equest-users-bounces at lists.onebuilding.org on behalf of Bosch,
Crina
Sent: Tue 8/2/2011 4:04 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] WTWHP with ERU 100% OA and WSHP

Dear eQuest users, 

 

I am working on a project that has WSHP conditioning all my spaces  but
I also have energy recovery units with 100% OA and the OA is conditioned
by WTWHP's . 

Did anybody tried this kind of system before because each idea I have
and tried to apply into eQuest does not work for me today. 

Any help is appreciated. 

Thank you. 

 

Crina Bosch
Engineer, Mechanical

 


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