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[TRNSYS-users] Cooling Coil - Bypass Factor Approach



Dear TRNSYS users,

 

I write because I have a doubt about the assumptions made behind cooling coil model by means of bypass factor approach (type 508 – TESS Library).

 

I know that for heating coil type 753 (TESS Library):

 

T_out_air=T_su_air*BPF+(1-BPF)*T_out_coil

 

And if

 

Minimal capacitance=Water flow capacitance

 

T_out_water=T_su_air

 

It means that a heat exchanger efficiency equal to 1.

 

 

For cooling coils

 

Sensible heat exchange

It seems that for this condition, the assumption made is the same as for heating coils. Is it right?

 

Dehumidification

I’ve tried to find a similar relationship but I haven’t been able. Could anyone explain me this?

 

Thank you in advance!

 

Roberto Ruiz