[Equest-users] 2 Pipe Loops

[Brian Fountain]

Omer

It seems to me that a loop-to-loop heat pump would better represent the system you are describing.   It can feed hot water and chilled water loops rather than requiring a 2-pipe loop to dictate whether it is in heating or cooling mode.   Further,  it can respond to the higher of the heating or cooling loop loads.

Brian

On Jan 22, 2023, 9:58 AM, at 9:58 AM, Omer Moltay via Equest-users <equest-users at lists.onebuilding.org> wrote:
>Dear All,
>
>I am using two different 2 pipe loops for both HW and CHW produced by a
>
>ground coupled heat pump. Each of these loops is only in heating or 
>cooling mode throughout the year. This is necessary as eQuest requires
>a 
>2 pipe loop for modeling a chiller heat pump (although the CHW 2 pipe 
>loop might also have been a cooling loop - but the result does not
>change).
>
>Attached is a simple model that features what I have just described.
>The 
>simulation run always gives the error that there is zero design flow in
>
>the loops, whatever I try (I have tried using secondary loops as well 
>but did not work).
>
>It would help me a lot if anyone could point out what could be wrong 
>with this set-up?
>
>Best,
>
>Ömer Moltay, LEED AP BD+C, ASHRAE BEMP, ASHRAE CPMP
>Mimta EcoYapi, LEED Proven Provider
>Hekimsuyu Cad. 559. Sk.
>No:39 34255 Kucukkoy Istanbul Turkey
>Tel: 90-212-617-2296
>Fax: 90-212-617-2297
>Mobile: 90-533-957-1394
>www.eco-yapi.com <http://www.eco-yapi.com>
>
>
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