Civil Engineering Reference
In-Depth Information
a winter experiment between the 4
th
and the 6
th
of February, 2011, can be observed
in Fig.
4.18
.
•
Test 4. Empty room and forced ventilation
. To estimate the unknown parameters
derived from the heat gain due to forced ventilation, i.e. using the HVAC system.
In this case, there is only one associated parameter, the correction factor of the
HVAC system, [
]. The test was performed under the following conditions: the
window and the door of the room were closed, there was no one in the room, all
the electrical appliances were turned off and the blind was closed. The results for a
winter experiment performed between 18 and 21 March, 2011 can be observed in
Fig.
4.19
. With the entire test an NMAE equal to 2
ζ
81% and an MAE of 0.22
◦
C
.
was achieved.
•
Test 5. Empty room and forced ventilation
. To validate the unknown parameter
obtained from test 4, [
]. The test was performed under the following conditions:
the window and the door of the room were closed, there was no one in the room,
all the electrical appliances were turned off and the blind was closed. In this case
an NMAE smaller than 2
ζ
5% has been achieved for the entire test. Moreover, the
results for a spring test obtained between 25 and 28 March, 2011 can be observed
in Fig.
4.20
.
.
•
Test 6. Occupied room
. To validate the behaviour of the model considering the
heat gain due to the influence of people. The test was performed under the fol-
lowing conditions: the window and the door of the room were closed, with several
disturbances due to the people going in/out and the blind was open. In this case, the
MAE is equal to 0.18
◦
C. Moreover, the results for a spring experiment performed
between 28 and 31 May, 2011 can be observed in Fig.
4.21
.
•
Test 7. Occupied room and natural ventilation
. To estimate the unknown para-
meters derived from the heat gain due to natural ventilation, [Cd, Cv]. The test
was performed under the following conditions: the door of the room was closed,
with several disturbances due to the people going in/out and the blind was open.
Moreover, the window of the room was opened and closed several times along the
test in order to evaluate natural ventilation. This test provides the worst results in
reference with the NMAE index, since its value is equal to 4
79 %. In addition,
the results for a spring experiment obtained between 20 and 25 April, 2012 can be
observed in Fig.
4.22
.
.
•
Test 8. Validation of the selected unknown parameters
. To validate the unknown
parameters obtained in the previous tests, i.e. the whole unknown parameters set,
Ψ
=
,Cd,Cv,
c
l
wind
,
c
h
wind
,
c
lim
wind
]. The test was performed
under the following conditions: the door of the room was closed with several
disturbances due to the people going in/out, use of forced ventilation and natural
ventilation through the window, and the blind was open. They are quite good since
an NMAE smaller than 4 % is obtained. Moreover, the results obtained for spring
performed between 30 and 31 May, 2012 can be observed in Fig.
4.23
.
[
U
w
, SHGC, SHGC
df
,
ζ
As it can be observed from Figs.
4.16
-
4.23
and Table
4.13
, the obtained results
with the selection of unknown parameters are quite representative since, in the worst
case, they present an NMAE, lower than 5%.
