Solar Building Integrated Photovoltaic Glass:
Overview:
Invention
of #solar photovoltaics has reshaped the energy scenario of the world. Oil
crisis in 1970 has created momentum for solar energy harvesting and solar PV
has emerged as a game changing technology. Abundant solar radiation (174
Petawatts) which is of free in nature can be trapped and converted in to useful
power without any emissions.
Solar PV
panels will occupy certain amount of area depending on the solar density value
(Watts per meter square).Many advancements came in improving this value but
still the space became an important constraint. This constraint is providing
greater resistance for commercial buildings to go for solar energy harvesting.
Since commercial spaces consumes nearly 40% of world’s energy consumption,
proper addressing of this constraint will provide greater benefits.
There came
a new technology called solar BIPV glass which can be integrated in to a
building as a building material which can solve the above mentioned problem of
space requirement.
Solar BIPV:
Building
integrated photovoltaics is the latest transparent glass used as a
building material & as an energy-generating device, capturing the sunlight
and transforming it into electricity. It is made up of 2 or more panes of heat treated, safety glass, which provides the same thermal and sound
insulation, and natural light as a conventional architectural glass. Thus, this
can be installed in place of conventional
glass on building facades, curtain walls, atriums, canopies and terrace
floor, among others.
By providing similar thermal performance as that of a conventional
glass, along with emission and cost free electricity from the sun, buildings
can drastically improve their energy efficiency, decrease operational costs,
and reduce their carbon footprint.
Features:
Generates
free and clean electricity by turning buildings into vertical power generating
stations.
Allows
natural light in, and filters 99% harmful UV radiation, and up to 95% IR
radiation.
Works as
a revenue- accelerator,
since it is the only building material that pays off! Also installed buildings
enjoys long term energy savings, tax credits and incentives as the technology
comes under solar.
These can
be customized in shape, color, size, thickness, and semi-transparency
degrees, easing its integration within any project and design.
Installer
friendly. From a mechanical standpoint, its installation is performed the same
way as installing conventional glass.
Two types of solar BIPV are available in the market like Amorphous and
crystalline.
Sample specifications of both the types were mentioned as below.
(Source: From Solar BIPV supplier Data Sheet)
Amorphous type:
THICKNESS CONFIGURATION (mm)**
|
SHGC
|
U value m2
|
U value ft2
|
External Light Reflection
|
Transparency
|
Peak Power
|
%
|
**W/m2K
|
Btu/h
ft2F
|
%
|
%
|
(Wp/m2
|
|
3.2+4
|
41%
|
5,7
|
1.00
|
7,6%
|
30,0%
|
28
|
6T+3.2+6T*
|
37%
|
5,2
|
0.92
|
7,3%
|
30,0%
|
28
|
6T+3.2+6T/12Air/6T
|
19%
|
2,7
|
0.48
|
7,3%
|
30,0%
|
28
|
6T+3.2+6T/12Air/6T low-e
|
17%
|
1,6
|
0.28
|
7,3%
|
30,0%
|
28
|
6T+3.2+6T/12Argon/6T low-e
|
17%
|
1,2
|
0.21
|
7,3%
|
30,0%
|
28
|
6T+3.2+6T/12Argon/4/12Argon/6T low-e
|
17%
|
1,0
|
0.18
|
7,3%
|
30,0%
|
28
|
Crystalline type:
THICKNESS CONFIGURATION (mm)**
|
SHGC
|
Valor U m2
|
U value ft2
|
External Light Reflection
|
Transparency
|
%
|
**W/m2K
|
Btu/h
ft2F
|
%
|
%
|
|
6T+6T
|
40%
|
5,5
|
0.97
|
8,3%
|
38,0%
|
6T+6T/12Air/6T
|
22%
|
2,7
|
0.48
|
8,3%
|
38,0%
|
6T+6T/12Air/6T low-e
|
20%
|
1,6
|
0.28
|
8,3%
|
38,0%
|
6T+6T/12Argon/6T low-e
|
20%
|
1,2
|
0.21
|
8,3%
|
38,0%
|
6T+6T/12Argon/4/12Argon/6T
low-e
|
20%
|
1,0
|
0.18
|
8,3%
|
38,0%
|
HVAC demand reduction with Solar BIPV:
Typical IRR & Payback:
Typical payback period is nearly 3 years. Average annual return during
the first 30 years of the investment is like 90%.
No comments:
Post a comment