[TRNSYS-users] Inquiry for energy balance for Zones (NTYPE 904)

[Sakulpipatsin, P.]

Dear Sir/Madam,

 

I would like to ask you some questions about energy balance for Zones
(NTYPE 904). The energy balance equation is in "the Type 56 user'
manual" I enclosed the balance information to this mail.

 

1.    I used the example of TRNSYS16, Restaurant, and looked at energy
balance for a zone in the example. All hourly energy balances
(BAL_ENERGY), generated by TRNSYS16, are not zero. However the attached
manual says that the values should be always 0. I also did energy
balance for a single zone model (using TYPE 56) and the results were
also not zero. Could you please give me a reason why they are not zero?
In a result file of NTYPE 904, there is a column of "REL_BAL_ENERGY"
What is the "REL_BAL_ENERGY"?

2.    In the energy balance equation, what is the QWGAIN? When I did
energy balance for those examples (in item 1), all values of the QWGAIN
are zero. Could you please explain why all the results are zero?

3.    In the energy balance equation, what is the QTRANS? Does the value
equal to summation of difference between QT_RGain_i and QCOMI for all
surfaces covering the zone? The definitions of QT_RGain_i and QCOMI are
in item 4.2.9.6 in the attached file. I thought in this way because only
QT_RGain_i and QCOMI of NTYPE 906 (intem 4.2.9.6 in the manual) come
from the inner surface nodes. And only QTRANS from the energy balance
equation interacts the inner surface nodes (when QWGAIN is zero).

 

Could you please answer my questions? Thank you very much.

 

Best regards,

 

Poppong Sakulpipatsin, MSc.

 

Doctoral researcher, Building Services 

Faculty of Architecture, Delft University of Technology 

Berlageweg 1, 2628 CR Delft, The Netherlands 

Tel. +31-15-278-5955

Fax  +31-15-278-4178 

e-mail P.Sakulpipatsin at bk.tudelft.nl 

http://bk.tudelft.nl/bt/installaties
<http://bk.tudelft.nl/bt/installaties> 

 

 

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