A
BSTRACT
This paper reports the experimental investigation of
Thai Modern Façade Wall (TMF) and Thai Modern
Façade Wall with Fin (TMF-WF) developed by RCSEE
(Rattanakosin College for Sustainable Energy and
Environment). The TMF composed of two layers, the
outer layer is different materials (fiber glass cement and
aluminum plates) and the inner layer is clear glass. The
TMF-WF has three layers; both layers are same the TMF
and the third layer is aluminum fin installed front of the
outer layer. They are opening air vents on the bottom
(room side) and the top (ambient side). The size of
opening was 0.14 x 0.60 m². TMF and TMF-WF were
investigated the performance and compared to the Double
Glass Window (DGW). Experimental results were
showed the average indoor illuminance of TMF-WF and
TMF was higher than the standard illuminance by about
1,300 lux and 2,000 lux, respectively. The air flow rate
and number of air change by about
0.005- 0.013 m
3
/s (18-
46.8 m
3
/hr) and 2-12 ACH
, respectively.
Keywords: Thai Modern Façade Wall with Fin, Thai
Modern Façade Wall, Double Glass Window, Datlighting,
Illuminance.
I
NTRODUCTION
Thailand is in the tropical climate zone, the effect of
the ambient condition has almost throughout the year.
The solar energy is one the effect to increase the cooling
load of the space room which is depending on the
architectural and engineering designs. The last decade in
Thailand, the solar chimney has promoted to integrate on
the building envelope for heat gain reduction and
enhancing air ventilation. Building Scientific Research
Center (BSRC) was proposed the performance of the new
configuration Trombe wall [1] namely the Partially-
Glazed Modified Trombe Wall (PG-MTW), it composed
of a masonry wall with glass block on the outer side and a
combination of gypsum with aluminum foil board and
acrylic panel on the inner side, the air gap space is 14 cm.
The upper (ambient side) and lower (room side) opening
air vents are equal sizes. Two units of PG-MTW were
compared the conventional Modified Trombe Wall
(MTW). The experimental results were highly
recommended for heat gain reduction and providing
indoor illuminance level. After that, BSRC proposed the
Glazed Solar Chimney Wall (GSCW) [2]; it composed of
Corresponding Author:
double glass panes with an air gap space and opening air
vents at the top and bottom of the unit. The results were
presented the experimental and numerical model; the
results confirmed that it suitable for hot countries and
enhanced air ventilation through the GSCW. In summer
2009, Dr. Withaya Puangsombut conducted to investigate
the performance of the Solar Chimney Window (SCW)
which was installed on the school building [3]. The SCW
composed of the louver glass on the outer side and the
inner side is glass pane, the spacing between both panes
is 0.065 m. Two types of louver glass (clear glass and
translucent glass) were used on the outer side and the
inner side is clear glass. The experimental results were
confirmed the confident for using the concept of solar
chimney to improve the indoor condition. An
enhancement the SCW by installed the curtain between
air gap spaces, two configurations of curtain namely
synthetic curtains [4] and natural hemp curtains [5] were
proposed. The SCW with synthetic curtains composed of
the louver glass on the outside and the inside is clear
glass, the surface area is 0.77 m
2
.
The air gap space is
0.065 m. The experimental results could reduce the room
temperature and induced air ventilation by about 2.5
C
and 55 m
3
/hr. The SCW with natural hemp curtain was
investigated the heat gain reduction and air ventilation.
The results were showed the high performance for
providing thermal comfort in the space room.
This paper presents the Thai Modern Façade Wall for
reducing daylighting into the space room, and providing
the natural ventilation.
E
XPERIMENTAL SET
-
UP
The small separate models for experiment are shown
in Figures 1 and 2. The DGW put to comparison between
TMF and TMF-WF. The sizing of the DGW is same
dimensions and sizing was 0.14 x 0.60 x 2.14 m. The
DGW is made of double plane consisted of clear glass
pane 0.60 x 2.00 x 0.06 m with an air gap and openings
located at the bottom (room side clear glass pane) and at
the top (ambient side). The size of openings was 0.14 x
0.60 m² and 0.14 m air gap. They were integrated into the
south facing of two small houses. The sizings of the room
were 1.50 x 1.50 x 2.40 m shown in Figure 3. The wall
and ceiling were built by gypsum board. They were
located on the top floor of 4
th
floor commercial building
at the Soi-Rewadi, Bangkraso, Meung, Nonthaburi and
Coordinate was 13
85’N, 100
50’E. Three types of
façade wall are considered as follows:
Daylighting and Thermal Performance of
Thai Modern Façade Wall
T. Ananacha
1
, W. Puangsombut
1
, J. Hirunlabh
2
, and J. Khedari
1, 2
1
Departmet of Sustainable Energy and Environment Technology and Management
2
Senior Academic Committee of Rattanakosin College for Sustainable Energy and Environment,
Rattanakosin College for Sustainable Energy and Environment, Rajamangala University of Technology Rattanakosin
96 Moo 3, Puttamonthon Sai 5, Salaya Puttamonthon, Nakhon Pathom, 73170 (Thailand)
2013 International Conference on Alternative Energy in Developing Countries and Emerging Economies
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