hi trnsys users ,
   
  I have a problem in fixing the parameter 8 in type 71 'the negative of second 
order efficiency coefficient ' .I tried to modify this parameter by changing 
the default value but it returns again in the initial value made by trnsys ' 
0.00833 w/m^2.K^2' .I must change this value because I want to create another 
industrial type . 
   
  What efficiency mode do I take ?
   
   In type 71 : Is the flow rate at test conditions per m^2 of the collector 
area or of another surface ? I mean if I change the value of the collector area 
, automatically I must change the flow rate at test conditions ?
   
  Please help me 
   
  thanks ; best reagrds 
   
  zouhour  
   
   
   
   
   
   

                
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