[TRNSYS-users] Drainback solar water heater

[Jeff Thornton]

No - there is no way in the current TRNSYS library to model the
collector or pipes to model the drainback situation where air replaces
water. That being said, you could create a simulation where the water in
the collector and pipes is "thrown away" when the pump starts up each
morning until enough time has passed where water would again be filling
the system. In that way you wouldn't be penalized for the thermal losses
from the fluid to the ambient overnight. While it's not technically
perfect, it does replicate to some extent what you are trying to do.


Jeff 

---

Jeff Thornton 

_President - TESS LLC_ 

_22 N. Carroll
Street, Madison WI USA 53703_ 

_Office: (608) 274-2577 Fax: (608)
278-1475_ 

_www.tess-inc.com_ 

_E-Mail: thornton at tess-inc.com_ 

On
10/19/2013 9:35 am, Malak Dakhli wrote: 

> Hi, 
> I am modelling a
drainback SDWH with TRNSYS 17 but in such system while it's working
there is water in the collectors and when it stops the water drains to
the tank and air replaces water in the collectors. 
> My question; is
there a way how to define these two fluids in the collectors? 
> Best
regards 
> 
>> MALAK DAKHLI, ING., M.SC. Chercheuse / Researcher
>>
Chaire de recherche industrielle en technologies de l'énergie et en
efficacité énergétique (T3E) /
>> Industrial research chair in
technologies of energy and energy efficiency (T3E)
>> École de
technologie supérieure,1100 Notre-Dame Ouest, Montreal, Qc, Canada, H3C
1K3
>> +1 514 559-3889 | malak.dakhli at gmail.com [1] | malak at t3e.info [2]
| www.t3e.info [3]
> 
> LA VILLE DE LVIS, LA CONFRENCE RGIONALE DES LUS
DE CHAUDIRE-APPALACHES, NERGIE VALERO INC. ET ECOSYSTEM, PARTENAIRES ET
PILIERS DE T3E : MERCI
 

Links:
------
[1] mailto:mostafa at t3e.info
[2]
mailto:mostafa at t3e.info
[3] http://www.t3e.info/
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20131021/e80df2b7/attachment-0001.htm>