Singapore''s First Utility-scale Energy Storage System. Through a partnership
Khoo Teck Puat Hospital, Singapore
The hospital developed an energy reduction plan that centered around the installation of a photovoltaic system to reduce energy use and carbon emissions of the hospital.
A solar photovoltaic (PV) system is a renewable energy technology that converts sunlight into electrical energy. The system consists of several components, including solar panels, inverters, batteries (optional), and other electrical components.Solar PV systems can be used for a variety of applications, such as lighting, low-power equipment, and small plug loads. This allowed the hospital to reduce energy consumption during the daytime. In addition, it reduces dependency on fossil fuel-based electricity.
Energy use has a significant impact on patients and health care workers. The cost of energy affects patient services and leads to higher costs. Poor air quality and increased greenhouse gas emissions can exacerbate respiratory conditions, allergies, and other health issues. Embracing sustainable energy practices can contribute to improved air quality, leading to better overall health outcomes.
The hospital aims to use energy-efficient equipment and install a clean energy system to reduce dependency on fossil fuel-powered electrical sources. This will reduce the carbon dioxide emissions of the facility and minimize environmental impact.
The strategy involved raising awareness, education, and collaboration among staff, the community, and partners, including:
The Green and Sustainability Committee together with facilities management and biomedical engineering lead the hospital''s energy and water efficiency initiatives to curb carbon emissions.
The strategy is driven by the hospital''s facilities management and includes cross-collaboration with the Housing Development Board (HDB) to install a solar PV system on the hospital building. HDB had extensive experience with solar PV installations, with different phases covering most HDB flat rooftops where practicable.
Hospital management is very supportive of any plans that will contribute to carbon reduction and sustainability. Case studies of similar solar PV installations based on leasing models accelerated the decision to install solar PV at the hospital.
Facilities management staff were involved with the solar PV installation along with the service provider. The service provider takes care of the maintenance and operation of the solar PV system, as it is based on a leasing model. Facilities management staff received adequate training to monitor the energy generated. It took about nine months to complete the solar PV installation on three towers of the hospital.
The hospital set a target to generate 1% of clean energy based on average monthly consumption. It is achievable with sufficient sunlight and a good irradiance level. Clean energy generation is tracked through a dashboard or local meter. The minimum guarantee of clean energy is 30, 989 kWh with sufficient irradiance.
There is no cost to the hospital as it is built based on a leasing model. Installation and maintenance costs will be undertaken by the service provider. The hospital will receive a 68% discount off the tariff rates charged by Singapore Power, the national grid provider of Singapore. This model also eliminates any maintenance costs due to wear and tear.
The hospital will obtain clean energy at a 68% discount off the national tariff rates. In addition, the facility will not incur any cost related to the maintenance of the solar PV system. There has been a total of 154,722 KG CO₂ emissions saved from the clean energy generated. This also has an environmental benefit, as there is an avoidance of 368,504 kWh that would have been generated by fossil fuel-based equipment. The solar PV system was commissioned and put into service in July 2021.
Financial benefits are achieved by avoiding the maintenance and operating costs of the solar PV system. This led to a reduction of approximately S$300,000 (USD 225,146) in the installation cost. The service provider needs to ensure the solar PV is in optimum condition to recover the cost through tariff rate sharing.
The secondary benefits are reduced air pollution and increased value of the green buildings. This also leads to job creation in the solar industry for system maintenance.
The Sembcorp Energy Storage System is Southeast Asia's largest energy storage system. (Photo: Sembcorp Industries)
SINGAPORE: The largest energy storage system in Southeast Asia opened on Jurong Island on Thursday (Feb 2), in another push for solar power adoption in Singapore.
The Sembcorp Energy Storage System has a maximum storage capacity of 285 megawatt-hours (MWh), enabling it to meet the electricity needs of about 24,000 households in four-room flats for one day in a single discharge.
EMA required the energy storage system to be completed by last December in view of ongoing developments in the global energy market, said Ms Jeanette Lim, EMA''s director of industry development.
This was so the facility could "provide energy, reserves and/or regulation services to enhance Singapore''s grid resilience and manage any protracted market and energy supply volatility", she said.
The largest energy storage system in Southeast Asia opened on Jurong Island on Thursday (Feb 2), in another push for solar power adoption in Singapore. Michelle Teo reports.
"Its rapid response time to store and supply power in milliseconds is essential in mitigating solar intermittency caused by changing weather conditions in Singapore''s tropical climate," Sembcorp and EMA said in a joint media release.
"It can also provide reserves to the power grid, which frees up power generation plants to generate more electricity to meet demand, when needed."
EMA chief executive Ngiam Shih Chun said the energy storage system will complement the authority''s efforts to maximise solar adoption, as well as enhance the power grid''s stability and resilience.
The deployment of the utility-scale facility means that Singapore has achieved its 200 MWh energy storage target ahead of time, he noted.
Singapore previously announced a target of deploying at least 200 MWh of energy storage systems beyond 2025 as part of the Singapore Green Plan 2030.
Minister for Manpower and Second Minister for Trade and Industry Tan See Leng said solar power was Singapore''s most viable source of clean energy, and scaling up its deployment was a key initiative to decarbonise the power sector.
The country has doubled its solar capacity since 2020, with more than 700 megawatt-peak (MWp) currently installed, added the minister, who spoke at the opening of the facility.
Singapore aims to increase solar capacity to at least 2 gigawatt-peak (2 GWp) by 2030, equivalent to powering about 350,000 households a year. This is expected to meet around 3 per cent of projected electricity demand.
The Sembcorp Energy Storage System comprises more than 800 large-scale battery units, whose charge and discharge cycles are centrally managed according to grid supply and demand.
Sembcorp, which also operates an energy storage system fleet in the United Kingdom, has a battery storage portfolio of 709 MWh.
About Singapore hospital energy storage
As the photovoltaic (PV) industry continues to evolve, advancements in Singapore hospital energy storage have become critical to optimizing the utilization of renewable energy sources. From innovative battery technologies to intelligent energy management systems, these solutions are transforming the way we store and distribute solar-generated electricity.
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