[TRNSYS-users] Strange results from Type567

[David Bradley]

Chun Kwong,
 You are correct - that is a bug we found some time ago. I will send you 
modified DLLs for your Green Building Library in a separate email.
Kind regards,
 David

a8304506 at graduate.hku.hk wrote:
> Hello, Trnsys users.
>
> I try to simulate the performance of a PV panel using Type567.  However, I have
> two queries:
>
> 1.  I try to compare the performance of a glazed and unglazed PV panel, but the
> power ouputs from the two types look the same.  Is it normal?
> 2.  The output from the PV panels is very small (less than 0.1kW for 100m2 PV
> panels).  By reviewing the source code of Type567, I suspect that there is an
> error in the calculation of the "Power".  It seems that the original formula
> "POWER=TAUALPHAN*XKAT*GT*PV_EFFICIENCY" needs to be multiplied by "AREA" when
> compared with the formulation for the "Absorbed radiation" based on
> "Q_ABS=AREA*GT*TAUALPHAN*XKAT*(1.-PV_EFFICIENCY)".  Am I correct?
>
> Your reply is highly appreciated.  Thank you!
>
> Best Regards
> LEE, Chun Kwong
> Division of Building Science and Technology
> City University of Hong Kong
>
>   
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>
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>   

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David BRADLEY                      22 N. Carroll Street - Suite 370 
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