[TRNSYS-users] No output from Type 74, CPC collector

[Paul.Kohlenbach at csiro.au]

Hi everyone,
 
I am experiencing a problem using type 74, the CPC collector. I have it
connected to the type 109 (TMY2) weather reader with the following
inputs:
 
-ambient temperature,
-incident radiation,
-incidence angle,
-zenith angle,
-solar azimuth angle,
-collector slope
 
I am using axis orientation mode 2. I also use a constant input fluid
temperature and mass flow. 
 
The problem I am experiencing is a fluid outlet temperature that is
slightly lower than the input temperature (i.e. affected only by the
thermal loss due to the temperature difference to ambient). There is no
heat transfer to the absorber tube although there is radiation going
into it.
 
If I use the same weather data and input setup on any other collector
model it works fine.
 
Has anyone experienced this before and maybe a solution to this?
 
Thanks!
Paul
 
Paul Kohlenbach
Postdoctoral Research Fellow
Distributed Generation
CSIRO Energy Technology
10 Murray Dwyer Circuit
Steel River Estate
Mayfield West, 2304  NSW,  Australia
Tel: (02) 4960 6107
Fax: (02) 4960 6111
Email: paul.kohlenbach at CSIRO.au
 
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