- Volume 31 Issue 2
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Simulation Study of Hydrogen Liquefaction Process Using Helium Refrigeration Cycle
헬륨 냉동사이클을 이용한 수소액화 공정모사 연구
- Park, Hoey Kyung (Future Environment and Energy Research Institute, Sangmyung University) ;
- Park, Jin-Soo (Future Environment and Energy Research Institute, Sangmyung University)
- Received : 2019.12.12
- Accepted : 2020.02.06
- Published : 2020.04.10
Compared to gaeous hydrogen, liquid hydrogen has approximately 1/800 volume, 800 times higher volumetric energy density at the same pressure, and the advantage of lower explosion risk and easier transportation than gaseous hydrogen. However, hydrogen liquefaction requires larger scale facility investment than simple compression storage method. Therefore, the research on energy-saving hydrogen liquefaction processes is highly necessary. In this study, helium/neon (mole ratio 80 : 20) refrigeration cycle was investigated as the main refrigeration process for hydrogen liquefaction. Process simulation for less energy consumption were carried out using PRO/II with PROVISION V10.2 of AVEVA. For hydrogen liquefaction, energy consumption was compared in three cases: Using a helium/neon refrigerant cycle, a SMR+helium/neon refrigerant cycle, and a C3-MR+helium/neon refrigerant cycle. As a result, the total power consumptions of compressors required to liquefy 1 kg of hydrogen are 16.3, 7.03 and 6.64 kWh, respectively. Therefore, it can be deduced that energy usage is greatly reduced in the hydrogen liquefaction process when the pre-cooling is performed using the SMR process or the C3MR process, which have already been commercialized, rather than using only the helium/neon refrigeration cycle for the hydrogen liquefaction process.
Supported by : 한국연구재단
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