石狩湾洋上風力によるエネルギーキャリアの生成と道央パイプラインを用いたエネルギー供給

抄録

Ammonia and hydrogen are attracting attention toward carbon neutrality in 2050. When these ammonia supplychains are introduced, the use of renewable energy is expected to expand. However, it takes a lot of cost and time to develop a power grid to expand renewable energy, so we will consider the case of using the existing Natural gas pipeline for energy transportation. For the ammonia supply-chain using the existing pipeline, the economic efficiency will be evaluated using the method of discounted cash flow, and the environmental performance will be evaluated from the amount of air pollutant reduction in the replaced coal-fired power generation. From the results described above, we will investigate the possibility of introducing ammonia supply-chain derived from renewable energy using the existing Natural gas pipeline. In this research, we examine Sapporo, Japan. Water electrolysis will be performed using the power of offshore wind power generated in Ishikari Bay, and the obtained hydrogen will generate ammonia, which will be transported by the existing Natural gas pipeline. The following three cases will be analyzed. When transport with ammonia, case of compressed hydrogen, and case of reinforced transmission lines. The energy and exergy flow of these cases will be clarified to obtain the total energy and exergy efficiency of the system. Use the method of discounted cash flow to analyze the payback period years from energy efficiency.