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.
Highlights
It is inconvenient when it is carried with the gas and stored up when natural gas is stored up and transported to the foreign countries. the natural gas which is gas is refrigerated to less than -162 ̊C, and volume is made to decrease drastically by taking the liquefied natural gas which is an extreme low temperature fluid, and transport, storage is being made efficient
Though seawater was used for a source of heat of gasification and cold heat thrown away into the sea beforetime, in recent years, a waste is being reduced by using cold heat that an extreme low temperature fluid has by using a heat exchange vessel effectively
We tried to examine it about the evaporating promotion of the cryogenic fluid in the method that contacted a cryogenic fluid and a normal temperature fluid directly by this research without using a heat exchange vessel and generation of ice
Summary
It is inconvenient when it is carried with the gas and stored up when natural gas is stored up and transported to the foreign countries. the natural gas which is gas is refrigerated to less than -162 ̊C, and volume is made to decrease drastically by taking the liquefied natural gas which is an extreme low temperature fluid, and transport, storage is being made efficient. It tried to examine it about the evaporating promotion of the cryogenic fluid in the method that contacted a cryogenic fluid and a normal temperature fluid directly by this research
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