| Affiliation: | 1. National Institute of Advanced Industrial Science and Technology (AIST), Department of Energy and Environment, Fukushima Renewable Energy Institute, Renewable Energy Research Center, 2-2-9 Machiikedai, Koriyama, Fukushima 963-0298, Japan;2. National Institute of Advanced Industrial Science and Technology (AIST), National Metrology Institute of Japan (NMIJ), Research Institute for Physical Measurement, Advanced Quantum Measurement Group, Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan;3. Meiyo Electric Co., Ltd., 485 Nanatsushinya, Shimizu-ku, Shizuoka 424-0066, Japan;4. Netsushin Co., Ltd., 2079-7 Kamitome, Miyoshi, Iruma-gun, Saitama 354-0045, Japan;5. KEI System Co., Ltd., 1-5-1 Ikuno, Ikunonishi, Ikuno-ku, Osaka 544-0024, Japan |
| Abstract: | Monitoring the temperature in liquid hydrogen (LH2) storage tanks on ships is important for the safety of maritime navigation. In addition, accurate temperature measurement is also required for commercial transactions. Temperature and pressure define the density of liquid hydrogen, which is directly linked to trading interests. In this study, we developed and tested a liquid hydrogen temperature monitoring system that uses platinum resistance sensors with a nominal electrical resistance of approximately 1000 Ω at room temperature, PT-1000, for marine applications. The temperature measurements were carried out using a newly developed temperature monitoring system under different pressure conditions. The measured values are compared with a calibrated reference PT-1000 resistance thermometer. We confirm a measurement accuracy of ±50 mK in a pressure range of 0.1 MPa–0.5 MPa. |
