Experimental study of temperature sensor for an ocean-going liquid hydrogen (LH2) carrier

• Published in: Cryogenics (Guildford) 2018-04, Vol.91, p.112-117
• Main Authors: Nakano, A., Shimazaki, T., Sekiya, M., Shiozawa, H., Aoyagi, A., Ohtsuka, K., Iwakiri, T., Mikami, Z., Sato, M., Kinoshita, K., Matsuoka, T., Takayama, Y., Yamamoto, K.
• Format: Article
• Language: English
• Subjects: Generators; Hydrogen; Liquid hydrogen; Liquids; Platinum; Sensors; Temperature; Temperature sensors
• ISSN: 0011-2275; 1879-2235
• DOI: 10.1016/j.cryogenics.2018.01.007

•PT-1000 temperature sensors for an ocean-going LH2 carrier were tested in LH2.•Fundamental data of the PT-1000 temperature sensors were successfully obtained.•The measurement accuracy of the preproduction temperature sensors was within ±50 mK.•The sensors with a small diameter have an advantage in high-precision measurement.•Small bubbles in LH2 give rise to temperature fluctuations within a range of ±6 mK. The prototype temperature sensors for an ocean-going liquid hydrogen (LH2) carrier were manufactured by way of trial. All of the sensors adopted Platinum 1000 (PT-1000) resistance thermometer elements. Various configurations of preproduction temperature sensors were tested in AIST’s LH2 test facility. In the experiments, a PT-1000 resistance thermometer, calibrated at the National Metrology Institute of Japan at AIST, was used as the standard thermometer. The temperatures measured by the preproduction sensors were compared with the temperatures measured by the standard thermometer, and the measurement accuracy of the temperature sensors in LH2 was investigated and discussed. It was confirmed that the measurement accuracies of the preproduction temperature sensors were within ±50 mK, which is the required measurement accuracy for a technical demonstration ocean-going LH2 carrier.