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    • 3. 发明专利
    • TWO-PHASE HEAT EXCHANGER AT CONTROLLED TEMPERATURE
    • JPH08233477A
    • 1996-09-13
    • JP2152696
    • 1996-02-07
    • ELF AQUITAINE
    • BERUNAARU SUPINNUPIEERU NUBOONATARI MAZE
    • F28D15/02F25B17/00F28D20/00
    • PROBLEM TO BE SOLVED: To perform heat-exchange with a container at a specified temperature and to selectively change an exchange temperature without depending upon a heat source for a varying temperature, by a method wherein a chamber to contain a medium making thermal contact with a container to effect sorption of gas is included, and the chamber is brought into selective contact with a vaporizing or condensing seat of gas. SOLUTION: An H2 O-NH3 solution S1 being low in an NH3 content is contained in a first storage container. The solution flows along a conduit 12 toward a second storage container 18 and the conduit 12 forms a chamber to contain a medium to effect sorption of gas. Liquid ammonia is contained in an evaporator 20, and when a valve 22 is opened, ammonia is evaporated and flows toward the conduit 12 and absorbed in an H2 O-NH3 solution. By closing the valve 22 and cutting off communication between the evaporator and a solution in the conduit 12, reduction of temperature is stopped at an intermediate temperature. Thus, control of the wall surface temperature of the conduit 12 of a heat-exchanger changes a flow rate of the H2 O-NH3 solution or water ammonia and is easily performed by opening and closing the valve 22.