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    • 2. 发明专利
    • APPARATUS FOR EVAPORATING LNG AND EVAPORATION
    • JPH08209158A
    • 1996-08-13
    • JP2064495
    • 1995-02-08
    • OSAKA GAS CO LTD
    • HAMADA MASAHIROSAKAMOTO HIDEYUKITERAI HIROSHI
    • C10L3/06
    • PURPOSE: To provide an LNG-evaporating apparatus which dispenses with a large-scale apparatus for dealing with ultrapeaks, requires a low initial cost, and can be run at a low operating cost by installing the first heating medium circuit passing through a heat recovery apparatus, which recovers heat from a heat supply medium, and a heat storage apparatus, and the second heat medium circuit passing through the heat storage apparatus and an LNG evaporator. CONSTITUTION: A fluid contg. heat to be recovered (e.g. a gas such as an exhaust combustion gas from a gas turbine for power generation) is introduced through a line 7 into an exhaust heat recovery apparatus 1 where heat is transferred from the fluid to the first heat medium (e.g. water) circulated by a pump through the first heat medium circuit 11. Heat recovered in the circuit 11 is at least partly transferred at a heat storage apparatus 3 from the first heat medium to the second heat medium (e.g. ethylene glycol) circulated by a pump through the second heat medium circuit 19. The storage apparatus 3 balances the amt. of exhaust heat with the amt. of heat of evaporation of LNG. An evaporated LNG is taken out through a line 23.
    • 5. 发明专利
    • STARTING SYSTEM FOR LIQUEFIED NATURAL GAS THERMAL GENERATING SET
    • JPS56148605A
    • 1981-11-18
    • JP5146280
    • 1980-04-17
    • OSAKA GAS CO LTD
    • TAKEUCHI SHIYOUZOUHISAKADO YOSHINORITERAI HIROSHI
    • F01K25/10
    • PURPOSE:To smoothly start an LNG thermal generating set by supplying liquefied gas at a predetermined gradient to lower the pressure of intermediate thermal medium in a condenser. CONSTITUTION:In starting an LNG thermal generating set, sea water 4 is supplied to raise pressure (a) of intermediate thermal medium in an evaporator 6 depending upon the temperature of sea water. On the other hand, LNG 1 is supplied at a gradient (b) of a preset flow rate to gradually lower the pressure (c) of intermediate thermal medium in a condenser 2. When the pressure (c) in the condenser 2 reaches a preset value A, a nozzle of a turbine 7 is opened whereupon, due to a larger difference of pressure at an entrance and an exit of the turbine 7, there appears an overshooting. Accordingly, the control of the pressure (c) at the point A becomes difficult and hence smooth starting cannot be ensured. Therefore, when the pressure reaches a value A+alpha which is higher by a predetermined value than the preset value, the nozzle of the turbine 7 is forcibly opened, and thereafter, when the pressure (c) reaches the preset value, the nozzle of the turbine is opened in accordance with the pressure (c), to thereby ensure smooth starting of the generating set.
    • 6. 发明专利
    • STOPPING SYSTEM FOR LIQUEFIED NATURAL GAS THERMAL GENERATING SET
    • JPS56143305A
    • 1981-11-09
    • JP4723880
    • 1980-04-09
    • OSAKA GAS CO LTD
    • TAKEUCHI SHIYOUZOUHISAKADO YOSHINORITERAI HIROSHI
    • F01K25/10F01K9/00
    • PURPOSE:To prevent occurrence of a flashing phenomenon and a mist accompanying phenomenon of an intermediate thermal medium and to ensure smooth transition to an LNG gasifying running of an LNG thermal generating set by constituting a stopping system for the generating set such that, when a turbine is to be stopped, the pressure of the intermediate thermal medium is equalized between an evaporating means and a condensing means. CONSTITUTION:In an LNG thermal generating set which employs an intermediate thermal medium (for example, propane), LNG 1 is supplied to a condenser 2 for the intermediate thermal medium and is heated to be gasified whereafter it is further heated by sea water in a heating device 3. On the other hand, the intermediate thermal medium cooled to be condensed by LNG is f ed by means of a pump 4 to an evaporator 5 and is evaporated there whereafter it is fed to a turbine 6 to which a generator G is connected. This arrangement further includes parallelly disposed large diameter bypass 8 and small diameter bypass 10. When the turbine is to be stopped, the small diameter bypass 10 is opened at the same time with closing of an inlet valve 7, and then the large diameter bypass 8 is gradually opened thereby to equalize the pressure of the intermediate thermal medium between the condenser 2 and the evaporator 5.