[TRNSYS-users] GSHP-suystem

[caria.roberto at tiscali.it]

hello everyone,
I'm using type 31b, type 556 and type 557a to simulate a GSHP-system 
but I don't understand some parameters:

Type 31b: the loss coeffcient has a default value of 20 kJ/hr.m^2.K 
but I think that common values are about of 6000 kJ/hr.m^2.K: does 
anyone know exact formula to determinate this parameter?

Type 556: does anyone know exact formula to determinate the flow 
convection coefficient and the no-flow convection coefficient?

Type 557a: 
wich is the value of "reference temperature" (PAR 20)? does anyone 
know exact formula to determinate it?
Can I assume as initial surface temperature (PAR 30) average air 
temperature? 
When is the "Initial thermal gradient" different to zero? And how 
could I know an exact value? 
Finally I need to know the meaning of the parameter 32 and its 
maximum and minimum temperature.    
Sorry for excessive questions
thanks in advance
Roberto



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