|
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, Berlageweg
1, 2628 CR Tel.
+31-15-278-5955 Fax
+31-15-278-4178 e-mail
P.Sakulpipatsin@bk.tudelft.nl http://bk.tudelft.nl/bt/installaties |