運輸交通機関の水素エネルギーシステム化による省石油とCO_2低減

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A concept of hydrogen energy system for the transportation system in Japan is designed and analyzed in view of fossil fuel conservation and CO_2 emission suppression. It is assumed that all the fuel oil used by the transportation media, 69 million kiloliter a year, is replaced by 9.8 million ton/year of liquefied hydrogen (LH_2). The liquefied hydrogen is produced in the South Pacific Ocean with solar photovoltaic cells on a large number of rafts of which total area is about 6000 km^2. The hydrogen is transported to Japan by 270 LH_2 tankers of which capacity is 125000 m^3. All the elements of the hydrogen energy system are supposed to be manufactured or constructed with the conventional energies such as coal, oil and electricity. Therefore the hydrogen energy system requires some investment of the conventional energies to build itself although it produces 100 % of the hydrogen energy as the fuel for the transportation media. The largest part of the energy investment in the hydrogen energy system is the one in the hydrogen production subsystem. As the technologies progress, the energy investment in the hydrogen production subsystem may be improved to one fourth of the one at present. In this case the hydrogen energy system can save 78 % of the petroleum energy which the current transportation system would consume and can suppress 81 % of the CO_2 emission which the petroleum consumption by the transportation media would release.
独立行政法人海上技術安全研究所の論文
1990-07-30

運輸交通機関の水素エネルギーシステム化による省石油とCO_2低減

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