[TRNSYS-users] How to change minimum allowed value for TYPE 560?

Janus Rathke janusrathke at gmail.com
Fri Jun 4 03:10:58 PDT 2021


Hi everybody

I am using an equation to calculate the convective heat transfer
coefficient, which i used as the input "Top Heat transfer coefficient" for
TYPE 560 solar collector.
The model works fine, but TRNSYS gives an error every time the loss
coefficient becomes negative. This will happen when the surface temperature
is below ambient temperature and convective heat transfer direction will be
reversed.

I get the error "The top loss heat coefficient must be greater than 0". I
have tried to remove this restriction, in the source code for Type 560, but
the error still emerges.

Does anybody know a way to change the allowed minimum values?
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