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      position: EnglishChannel > Innovation China > Article

      LNG Storage Helps Energy Efficiency

      Source: Science and Technology Daily | 2022-03-10 10:09:08 | Author: TANG Zhexiao

      LNG storage tanks in Yancheng Binhai Port Industrial Park. (PHOTO: VCG)

      By TANG Zhexiao

      It is treated as a fuel for the energy transition, is incredibly dense, and is a colourless fossil fuel that can be conveniently transported in ships around the world like crude oil, yet produces half as much carbon as coal when it burns.

          Liquefied natural gas (LNG), is a kind of natural gas that has been cooled down to liquid form for ease and safety of non-pressurized storage or transport.

          Chinese state -run energy firm CNOOC announced on February 20 that it has completed pouring concrete for the platforms of six LNG storage tanks in Yancheng Binhai Port Industrial Park, Jiangsu province.

          As the largest of its kind in the world, the tanks are designed and built to have a total designed storage capacity of 270,000 cubic meters.

          Innovation during the construction

          China's first industrialized LNG plant was completed and put into operation in November 2001. To date, more than 230 LNG plants have been built, widely distributed in Inner Mongolia Autonomous Region, Xinjiang Uygur Autonomous Region, Shaanxi and Sichuan provinces.

          After years of scientific research, CNOOC has successfully solved the design problems and realized a number of technological breakthroughs in the field of LNG storage tanks.

          The six completed tank main bodies have a total pouring volume of 70,860 cubic meters, equivalent to 30 standard Olympic size swimming pools. Each storage tank is 60 meters high, equivalent to the height of the National Stadium (the Bird's Nest), and can stack three Boeing 747 at the same time.

          For mass concrete pouring, the concrete expands with heat if effective temperature control measures are not taken, said Ren Jianxun, deputy manager of the Yancheng LNG Terminal project extension department.

          To deal with this problem, the project team made innovations. Four groups of 16 temperature sensors were assembled on the upper, middle, lower and surface of each pouring area. With accuracy as low as 0.1 ℃ and data stored in the cloud, technicians can monitor temperature in real time to realize intelligent and precise temperature control.

          Meanwhile, the pouring area was adjusted to a 45-degree symmetrical arrangement, reducing the length of the construction joints, effectively preventing cracks and improving the construction quality.

         Clean energy helps carbon neutrality

          Against the background of energy transition and upgrading, natural gas is recognized clean and environmentally friendly worldwide, because of its lower emissions than coal of carbon dioxide, sulfide, soot and nitrogen oxides, with the same power generation. In addition, the gas-fired units of natural gas power generation have fast start-stop speed, strong load adaptability, and flexible operation, which is conducive to improving the security of the power grid.

          Upon completion at the end of 2023, the project will include ten tanks, including six new ultra-large tanks with an annual LNG processing capacity of six million tons each year, according to CNOOC.

          Based on the residents' daily gas consumption, such capacity can be used for people's livelihood in Jiangsu province for about 28 month. The project can also achieve emission reduction of 28.5 million tons of carbon dioxide and 232,500 tons of sulfur dioxide, equivalent to planting 60 million trees, accelerating the green development of the Yangtze River Economic Belt.

          Li Feng, general manager of the project, said LNG is set to be a green and clean energy supply station, featureing facilities for power generation and hydrogen production with gas. It is of great importance for optimizing the energy structure and achieve carbon peaking and carbon neutrality.

      Editor: 湯哲梟

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