Explosive Evaporating Phenomena of Cryogenic Fluids by Direct Contacting Normal Temperature Fluids

T Watanabe, H Maehara, S Itoh

Abstract


Cryogenic fluids have characteristics such as thermal stratification and flashing by pressure release in storage vessel. The mixture of the extreme low temperature fluid and the normal temperature fluid becomes the cause which causes pressure vessel and piping system crush due to explosive boiling and rapid freezing. In recent years in Japan, the demand of cryogenic fluids like a LH2, LNG is increasing because of the advance of fuel cell device technology, hydrogen of engine, and stream of consciousness for environmental agreement. These fuel liquids are cryogenic fluids. On the other hand, as for fisheries as well, the use of a source of energy that environment load is small has been being a pressing need. And, the need of the ice is high, as before, for keeping freshness of marine products in fisheries. Therefore, we carried out the experiments related to promotion of evaporating cryogenic fluids and generation of ice, in the contact directly of the water and liquid nitrogen. From the results of visualization, phenomena of explosive evaporating and ice forming were observed by using video camera.

Full Text:

PDF

References


Fukusako, S. and Inaba, H., "Phenomena of heat transfer under low temperature environment and its applications", Yokendo Ltd., 1996, (in Japanese).

Seki, N., "Refrigeration and air conditioning engineering", Morikita Ltd., 1991, (in Japanese).

Fan, S. C., Chu, J. C. and Scott, L. E., 1968, "Thermal Stratification in Closed Cryogenic Containers", Adv. Cryogenic. Eng., Vol.14, pp.249-257.

Watanabe, T., Hanaoka, Y. and Tokura, I., 1995, "Flashing Phenomena of Liquid Nitrogen in a Pressure Vessel", Trans. JSME, (in Japanese), Vol.61, No.585, pp.1849-1854. CrossRef

Watanabe, T., Hanaoka, Y. and Tokura, I., 1998, "Flashing Phenomena of Liquid Nitrogen in a Pressure Vessel: Part 2: Mist formation and Behavior of the Liquid Surface in the Early Depressurization Process", Heat Trans. Japanese Research, Vol.27, No.5, pp.327-335. CrossRef




DOI: http://dx.doi.org/10.1260/1750-9548.6.2.107

Copyright (c) 2016 The International Journal of Multiphysics