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,

?mer 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