Image: Akasaka Heating and Cooling
The Japanese energy supplier Akasaka heating and cooling has unveiled plans to use green hydrogen to produce heat and electricity for the Akasaka 5-Chome district heating system in Minato-Ku, Central Tokyo.
“This new development marks the first such initiative for district heating and cooling company in Central Tokyo,” the company added. “By using green hydrogen to generate electricity with fuel cells and change some fuels from city gas, Akanetsu wants to help reduce CO2 emissions in the production of cooling and heat.”
Akasaka heating and cooling will involve green hydrogen from an unknown location in Japan and transport by truck to the underground facility in Tokyo. The hydrogen is stored in 1,350 normal cubic meters (NM3) hydrogen storage tanks.
The company said that the alloy tanks store safely and compact hydrogen by adsing it on a special alloy, reducing the gas volume to a thousandth of the original size. In contrast to conventional liquid hydrogen tanks and high -pressure containers, hydrogen is adsorbed on storage alloys treated with a low pressure of less than 1 megapascal (MPA). The use of non-hazardous alloys that do not ignite near fire ensures that the system is safe for installation in buildings.
Akanetsu said it will integrate the hydrogen with Panasonic Fuel Cell Systems, set for installation by October 2025 and operational in January 2026. Each system will have a capacity of 5 kW and generate electricity for use in the factory, supplying power to LED lights, air conditioning and emergency results.
The remaining hydrogen is mixed 50:50 with natural gas 13A and used in two hydrogen mixing combustion boilers, each with a converted steam volume of 2,000 kilograms per hour (kg/h). The boilers provide heating to a group of buildings in the district.
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