[TRNSYS-users] Type 539 solar collector useful energy gain

[Richard Thygesen]

Jeff

Thank you for replying. I have identified the problem. It was the pump heat loss to the fluid stream which accounted for the difference between the output from the collector and my calculations.
A typical newbie mistake I guess.

Best regards
Richard Thygesen

Från: Jeff Thornton [mailto:thornton at tess-inc.com]
Skickat: den 31 juli 2012 18:33
Till: trnsys-users at cae.wisc.edu
Ämne: Re: [TRNSYS-users] Type 539 solar collector useful energy gain


Richard,



I just dragged out Type 539, connected it to a TMY-3 weather file and ran it for a month.  The results from the model exactly match the results from the Qu=Mdot*Cp*(Tout-Tin) equation to the 12th decimal.  Check to make sure you have the same specific heat in both, have the correct connections etc.  If you are still running into issues then send the project to your distributor for a closer look.



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<http://www.tess-inc.com>

E-Mail: thornton at tess-inc.com<mailto:thornton at tess-inc.com>



On 07/31/2012 8:33 am, Richard Thygesen wrote:
I have a question about type 539 solar collector.
When I compare the output useful energy gain with my own calculation it doesen’t match.
Why is that and shouldn’t the useful energy gain be the same as my calculation?

I have used the following q=massflow*Cp*(Tout-Tin) to calculate the useful energy.

Best regards
Richard Thygesen

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