| 摘要 |
PROBLEM TO BE SOLVED: To produce a cold accumulating medium derived from a gas hydrate within a range of 0 deg.C to minus 50 deg.C, without being subjected to the regulation of a high-pressure gas safety law and regulations. SOLUTION: A cold accumulating vessel is supplied with a specified quantity of liquefied petroleum gas after being charged with alcohol aqueous solution in specified concentration so as to cool that alcohol aqueous solution, and then liquefied petroleum gas of a specified quantity per unit time is sucked and is discharged into the above alcohol aqueous solution. It is to be desired that the alcohol aqueous solution should be ethylene glycol aqueous solution or ethanol aqueous solution. For liquefied petroleum gas, it is to be desired that one or more should be selected and used from among propane, butane, pentane, and hexane. |
