エネルギ観点から見た船舶の建造

抄録

Forecast of energy shortage were already stimulating the research and development of various saving energy systems, and the requirement of adequate analysis of energy consumption was emphasized.
This paper notes the‘Energy Budget Method’for shipbuilding for the purpose of the evaluation of energy consumption.
In general, the energy content of final products is made up of two parts; the direct energy content, the energy purchased by the firm for making and selling the products; and the indirect energy content, the energy used in the manufacture of supplies and in the service.
And the‘Energy Budget Method’is one of the means for analysing the direct and indirect energy cost of products.
In the shipbuilding field, our study shows the indirect energy, used for extracting and refining the materials and manufacturing the main engines and auxiliaries is far more than the direct energy which convert the materials into final ships in the shipyards.
For the purpose of minimization of the energy required in the construction of ships, the wider systems optimization processes, in its industry's suppliers, and in its suppliers of materials, to be considered.