SINGAPORE - The world's largest
floating solar photovoltaic cell test-bed measuring 1ha and containing 10
different solar photovoltaic systems was launched on Tuesday (Oct 25) by
Minister for the Environment and Water Resources Masagos Zulkifli. The $11-million
test-bed - the size of about 100 five-room Housing Board flats located at
Tengeh Reservoir in Tuas - will, over the next six months, be used to study the
performance and cost-effectiveness of the various systems.
Speaking at the Asia Clean Energy Summit held at the Sands Expo
and Convention Centre, Mr Masagos said that being sustainable should not be
considered as an alternative or a trade-off to economic development.
"Rather, the pursuit of clean
and renewable energy development is a venture into greater opportunities and
growth, and also a necessary step into the green era," he said.
Each solar photovoltaic system has a capacity of 1 kilowatt peak
and will be studied with some 100 sensors and the results pitted against one
another. The floating system will also be compared against a 20 kilowatt peak
roof-top system that has been constructed in the vicinity of Tengeh Reservoir. Eventually,
the two best-performing floating solar photovoltaic systems will be chosen and
placed on a larger trial of 2 megawatt peak capacity.
The test-bed is an initiative by the Economic Development Board
(EDB) and national water agency PUB. The scientific evaluation of the various
solar photovoltaic systems will be conducted by the Solar Energy Research
Institute of Singapore (Seris). Examples of systems being tested include one
that uses bi-facial solar cells which allow sunlight to enter from both sides,
and another that has an "active cooling" feature where water is
pumped onto the solar cells to cool them down to improve their performance.
PUB will also study the environmental impact on the reservoir.
This includes the impact on water quality and biodiversity of the reservoir as
a result of the photovoltaic installations. Floating solar photovoltaic cells
are becoming an increasingly attractive way for Singapore to harness sunlight
due to limitations in roof space, and also for their higher performance. Previous
research suggests that they can be up to 20 per cent more efficient than
roof-top systems in tropical countries, and 5 per cent more efficient in
temperate countries. This is brought on by cooling effects provided by the
water body the solar panels are floating on.
"As a highly dense city state with limited space for solar
deployment, Singapore is placing emphasis on building up urban solar
capabilities which include floating solar as a key focus area. Singapore is
also positioned as a living lab for companies to test and commercialise
innovative urban solutions," said Mr Goh Chee Kiong, executive director for
cleantech at EDB.
"We are confident that the floating photovoltaic test-bed
will serve as an important reference for local and international companies to
scale up their solar technologies for global markets," he said.
EDB has also recently secured five new investments across the
fields of solar, microgrids, smart grids and energy management in Singapore
worth a total of $50 million in cumulative business expenditure over the next
five years.
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