The Green Towns Programme is a 10-year plan to make HDB towns more sustainable and liveable. The programme will focus on reducing energy consumption, recycling rainwater, and cooling HDB towns. The programme aims to reduce energy consumption in HDB towns by 15% from 2020’s levels by 2030.
Solar panels will be installed on more HDB blocks to power common services with clean energy. Solar energy that is harnessed is first used to power common services (e.g. lifts, lights and water pumps) in HDB estates in the day, with excess energy channelled to the electrical grid. On average, HDB blocks are able to achieve net-zero energy consumption at common areas.
With the installation of more solar panels, HDB aims to stretch our solar target to achieve solar power generation of 540 MWp by 2030. This target is equivalent to the energy needed in a year to power 135,000 4-room HDB flats.
Smart LED lighting will be installed at all common areas of HDB estates, such as corridors and stairways, to further reduce energy consumption.
The system is equipped with sensors and smart analytics to gradually light up the path the user will be taking in advance and dim down after that. It will also send alert to maintenance team when a fault is detected. Compared with conventional LED lighting, smart LED lighting can further reduce energy used for lighting by up to 60%.
HDB will be working with Town Councils on the rolling out of Smart LED lighting.
As part of HDB’s efforts to help towns conserve water, HDB has developed the UrbanWater Harvesting System (UWHS), which is an innovative solution that integrates dual functions of harvesting rainwater and detention of stormwater into one system.
The UWHS collects rainwater and stores it in an underground tank. The harvested rainwater is treated before being recycled for washing of common areas and watering of plants, which reduces the use of potable water for these activities by more than 50%. At the same time, it also detains the stormwater before releasing to the public drains at a lower discharge rate. This helps to mitigate the risk of flooding and obviating the need for expensive drainage upgrading works.
The UWHS will be piloted at selected sites.
Cool coatings contain pigments that reflect the heat of the sun. Surfaces treated with cool coatings absorb less heat during the day. As a result, they emit less heat at night, leading to a cooling effect on the environment, which can help mitigate the Urban Heat Island effect and improve thermal comfort for residents.
Cool coatings will be piloted at a neighbourhood on building façades, roofs, and pavements. Upon successful completion of the pilot, the application of cool coatings can be extended to more estates.
HDB will introduce more greenery in the form of urban farms, extensive greenery, or community gardens to the top decks of selected Multi-Storey Car Parks (MSCPs) in HDB estates.
Extensive greenery on the top decks of MSCPs soften the urban environment as visual relief, and mitigate heat gain by helping to reduce surface and ambient temperatures. This will be implemented using the Prefabricated Extensive Green (PEG) Roof Tray System, a lightweight and modular system developed by HDB as an extensive greenery solution for building rooftops. The PEG roof trays can also be used for community gardening, which can bring together residents with similar interests to co-create spaces and beautify the estates.
HDB has been working with SFA to introduce Urban farming to selected MSCPs. Developing alternative spaces for urban farming is one of the initiatives driven by SFA. This is in line with the ‘30 by 30’ target to build up the local agri-food industry’s capability and capacity to produce 30% of our nutritional needs locally and sustainably by 2030.
Extensive greenery using PEG Roof Tray system
Urban Farms. Photos courtesy of Citiponics.