[TRNSYS-users] Cooling Coil - Bypass Factor Approach

[Roberto Ruiz]

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

 

 

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