| 초록 |
Constructing the infrastructure for transporting liquid hydrogen has a difficulty handling the boil-off generation due to the cryogenic condition. Therefore, the modeling and configuration of the liquid hydrogen receiving terminal including boil-off re-liquefaction is suggested. The energy consumption and economic analysis are conducted by deciding the insulation material and its thickness of the tank, the amount of send-out, and operating pressure of the recondenser. The numerical calculation of the boil-off rate in the liquid hydrogen storage tank. The result shows that if the amount of send-out is not enough to fully re-liquefy the boil-off gas, the high-pressure compressor should remove the remaining gas, which induces both higher energy consumption and operating cost. The lower boil-off rate shows lower energy consumption due to the decreased boil-off gas compressor duty, but the capital cost becomes higher due to the expensive insulation material. Therefore, since liquid hydrogen itself is a highly efficient refrigerant, using enough send-out is sufficient to handle the whole process even if the boil-off rate is high. |
