運輸交通機関用太陽水素メタノールエネルギーシステム

概要

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A solar hydrogen-methanol energy system for transportation sector in Japan is proposed in view of fossil fuels conservation and CO_2 emission suppression. It is assumed that all the fuel oil used by land transportations except railroads, 85.2 billion liters a year, is replaced by 165 million tons a year of methanol. The methanol is synthesized and refined in Australia, and is transported to Japan by 55 methanol tankers of 228000DW. Hydrogen, one material of methanol, is produced there with solar photovoltaic arrays of 8870km^2 on the present technical level. CO_2, the other material of methanol, is liquefied after being recovered from fossil fuel fired power plants in Japan and is transported to Australia by 121 LCO_2 tankers of 144000DW. Next, the energy investment in prime system elements and CO_2 emission involved are estimated. It is the energy investment and CO_2 emission in the photovoltaic installation that account for nearly all of them in this system. Supposing that the life of the system is 30 years and the photovoltaic cells are manufactured based on the present technical level, this system can reduce fossil fuel consumption and CO_2 emission to about one-third of the present one. With the future technological progress in photovoltaic cells, the effect of introducing the system will better.
独立行政法人海上技術安全研究所の論文
1998-11-11