National Water Agency PUB and Sembcorp Floating Solar Singapore, a wholly-owned subsidiary of Sembcorp Industries (Sembcorp) has commence construction of the 60 megawatt-peak (MWp) floating solar photovoltaic (PV) system on Tengeh Reservoir. This marks a significant milestone in building one of the world’s largest inland floating solar PV systems, which not only helps to reduce dependency on fossil fuels and thus carbon emissions, but also builds national climate resilience for a more sustainable future.
Solar energy is Singapore’s most viable renewable energy source, but large-scale deployment of solar panels is challenging due to its dense urban landscape and limited land. Beyond rooftops and vertical spaces, PUB’s large expanse of water bodies and reservoirs can now serve the dual purpose of water catchment and electricity generation. This follows positive trial outcomes and extensive environmental studies which show that floating solar panels have minimal impact on the reservoir’s water quality and biodiversity.
This large-scale floating solar PV system at Tengeh Reservoir – the first of its kind in the region – will enable Singapore to be one of the few countries in the world to integrate green technology with water treatment. When the project begins full commercial operations next year, the amount of clean energy generated will be sufficient to power PUB’s local water treatment plants, offsetting seven percent of PUB’s annual energy needs.
Innovative design with sustainable materials and use of smart technologies to enhance operations
The project will also incorporate new innovations in floating solar PV design and construction. Every component of the system was carefully designed and selected based on Singapore’s climate conditions in order to maximise energy generation, minimise environmental and water quality impact, and be durable enough to fulfil a service lifespan of 25 years. These include double-glass PV modules instead of the single-glass variant commonly used for rooftops installations, to enhance durability in a wet and humid environment. The PV modules are supported by certified food-grade quality high density polyethylene (HDPE) floats which are UV-resistant to prevent degradation from the intense sunlight exposure.
Ng Joo Hee, Chief Executive, PUB said, “With this floating solar power plant, which we believe to be one of the largest in the world, PUB takes a big step towards enduring energy sustainability in water treatment. Solar energy is plentiful, clean and green, and is key to reducing PUB’s and also Singapore’s carbon footprint.”
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