[TRNSYS-users] Tinlet<Tamb collector

[Sancho,Fernando]

Hello Trnsys-Community;
 
I want to simulate a Solar loop where the inlet temperature to the collector field is constant (12ºaprox.)and usually lower than ambient temperature.
In this case I CAN NOT use the regular collector efficency equations, can I?
I read it somewhere and  it makes sense, we would get a positive gain in the term with (Tinlet-Tamb) but still losses in the cuadratic one...
How can I model this situation from the ASHRAE data of the collector?
 
Thanks a lot
Any tip would be appreciated
 
 
 
Fernando Sancho 
PHÖNIX SonnenWärme AG

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PHÖNIX Sonnenwärme AG
Am Treptower Park 28-30
D-12435 Berlin