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HK Electric to commission gas-fired unit and FSRU
HK Electric is set to commission its new gas-fired unit in Q1 2022. The project includes the world’s largest FSRU which will provide HK Electric’s Lamma power station with natural gas as the city moves away from coal power
To facilitate its fuel transition from coal to gas, the public utility HK Electric is aiming to build three gas-fired units within the company’s 2019-2023 Development Plan. In 2020, power generating unit L10 of HK Electric’s Lamma power station entered into service.
HK Electric managing director Wan Chi-tin said, “With the commissioning of L10 last year, there was a substantial increase in the proportion of gas-fired generation. And with L11 coming on stream, we have taken a major step forward to provide customers with cleaner power.”
HK Electric said the project faced numerous challenges with Covid-19-related disruptions, but L11 has now been successfully synchronised to the company’s power grid. The 380-MW L11 generating unit will be used as a baseload machine and its thermal efficiency will be around 58.5%, roughly the same as L10 and much higher than the existing coal-fired units. The new unit uses combined-cycle generation technology – a widely used method to generate electricity from fossil fuel. To further enhance its emissions performance, L11 is equipped with a selective catalytic reduction system to reduce NOx emissions in the power generation process.
The planned 4-mta LNG import terminal is set to use 263,000-m³ FSRU Challenger floating storage and regasification unit to supply Lamma power plant and Black Point, a power plant operated by China Light and Power Company in Hong Kong, via subsea pipelines. Shell will supply LNG as part of a long-term deal.
Over its lifetime, the L11 unit is expected to achieve carbon emission reduction of 35M tonnes. The new unit will go through testing and commissioning before coming into commercial operation in Q1 2022 as planned and the annual proportion of gas-fired generation by HK Electric will reach more than 50%.
That will allow the company to retire an older gas-fired unit, GT57, as well as two coal-fired units sometime next year, while the remaining coal-fired units will be phased out by the early 2030s.
Mr Wan added that the installation of the gas-fired unit L12 has begun and is on track to be commissioned in 2023. When complete, it will further boost the gas-fired generation to about 70% of the company’s total output and reduce carbon emissions by 40% compared with 2005 levels.
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