[TRNSYS-users] Useful energy gain type539

[Jeff Thornton]

Circulate water through the collector when there is little or no
solar radiation and the inlet temperature is above the ambient
temperature. 

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 07/25/2012 4:26 pm, Richard Thygesen wrote: 

> Dear Trnsys users!

> 
> I wonder how it is possible to get a negative "useful energy gain"
from solar collector type 539 during some timesteps. 
> 
> I have read
the documentation without any success of finding the answer for this
question. 
> 
> Best regards 
> 
> RICHARD THYGESEN
 
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