Steam turbine plant

Abstract

The object of the present invention is to carry out a highly efficient power generation or to efficiently use an exhaust heat of a low temperature. A steam turbine plant includes a steam turbine 1 and a heating unit configured to heat a working fluid to be supplied to the steam turbine 1 . The heating unit includes a first heat source 14 using a fossil fuel or a second heat source 8 using an extracted steam from the steam turbine 1 , and a third heat source 44 not using a fossil fuel but using a waste exhaust combustion gas.

1 . A steam turbine plant comprising:
 a steam turbine; and   a heating unit configured to heat a working fluid to be supplied to the steam turbine;   wherein:   the heating unit is configured to heat the working fluid by a first heat source using a fossil fuel or a second heat source using an extracted steam from the steam turbine; and   the heating unit is configured to further heat the working fluid in a low temperature zone by a third heat source other than a solar heat, the third heat source not using a fossil fuel.   
     
     
         2 . The steam turbine plant according to  claim 1 , wherein
 the third heat source includes an exhaust combustion gas of a waste combustion furnace.   
     
     
         3 . The steam turbine plant according to  claim 1 , wherein
 the third heat source includes a steam or a hot water taken out from a ground.   
     
     
         4 . The steam turbine plant according to  claim 1 , wherein
 the third heat source includes an industrial exhaust heat.   
     
     
         5 . The steam turbine plant according to  claim 1 , wherein
 the third heat source includes an exhaust heat of a fuel battery or an internal combustion engine.   
     
     
         6 . The steam turbine plant according to  claim 1 , wherein
 the first heat source includes an exhaust gas of a gas turbine driven by burning a fossil fuel.   
     
     
         7 . The steam turbine plant according to  claim 1 , wherein
 the first heat source includes an exhaust combustion gas in a coal fired boiler.   
     
     
         8 . A steam turbine plant comprising:
 a steam turbine; and   a heating unit configured to heat a working fluid to be supplied to the steam turbine;   wherein:   the heating unit is configured to heat the working fluid by a fourth heat source using a solar heat or a second heat source using an extracted steam from the steam turbine;   the heating unit is configured to further heat the working fluid in a low temperature zone by a fifth heat source other than a solar heat; and   the fifth heat source includes an industrial exhaust heat.   
     
     
         9 . A steam turbine plant comprising:
 a steam turbine; and   a heating unit configured to heat a working fluid to be supplied to the steam turbine;   wherein:   the heating unit is configured to heat the working fluid by a fourth heat source using a solar heat or a second heat source using an extracted steam from the steam turbine;   the heating unit is configured to further heat the working fluid in a low temperature zone by a fifth heat source other than a solar heat; and   the fifth heat source includes an exhaust heat of a fuel battery or an internal combustion engine.   
     
     
         10 . The steam turbine plant according to  claim 8 , wherein
 the fourth heat source uses a heat source storing a solar heat.   
     
     
         11 . The steam turbine plant according to  claim 1 , wherein:
 the heating unit includes a first heater using the first heat source and a third heater using the third heat source; and   all or a part of the first heater and the third heater are arranged in parallel with respect to the working fluid.   
     
     
         12 . The steam turbine plant according to  claim 1 , wherein:
 the heating unit includes a second heater using the second heat source and a third heater using the third heat source; and   all or a part of the second heater and the third heater are arranged in parallel with respect to the working fluid.   
     
     
         13 . The steam turbine plant according to  claim 1 , wherein:
 the heating unit includes a first heater using the first heat source and a third heater using the third heat source; and   all or a part of the first heater and the third heater are arranged in series with respect to the working fluid.   
     
     
         14 . The steam turbine plant according to  claim 13 , wherein
 the third heater is arranged on an upstream side of the first heater.   
     
     
         15 . The steam turbine plant according to  claim 1 , wherein:
 the heating unit includes a second heater using the second heat source and a third heater using the third heat source; and   all or a part of the second heater and the third heater are arranged in series with respect to the working fluid.   
     
     
         16 . The steam turbine plant according to  claim 15 , wherein
 the third heater is arranged on an upstream side of the second heater.   
     
     
         17 . The steam turbine plant according to  claim 8 , wherein:
 the heating unit includes a fourth heater using the fourth heat source and a fifth heater using the fifth heat source; and   all or a part of the fourth heater and the fifth heater are arranged in parallel with respect to the working fluid.   
     
     
         18 . The steam turbine plant according to  claim 8 , wherein:
 the heating unit includes a second heater using the second heat source and a fifth heater using the fifth heat source; and   all or a part of the second heater and the fifth heater are arranged in parallel with respect to the working fluid.   
     
     
         19 . The steam turbine plant according to  claim 8 , wherein:
 the heating unit includes a fourth heater using the fourth heat source and a fifth heater using the fifth heat source; and   all or a part of the fourth heater and the fifth heater are arranged in series with respect to the working fluid.   
     
     
         20 . The steam turbine plant according to  claim 19 , wherein
 the fifth heater is arranged on an upstream side of the fourth heater.   
     
     
         21 . The steam turbine plant according to  claim 8 , wherein
 the heating unit includes a second heater using the second heat source and a fifth heater using the fifth heat source; and   all or a part of the second heater and the fifth heater are arranged in series with respect to the working fluid.   
     
     
         22 . The steam turbine according to  claim 21 , wherein
 the fifth heater is arranged on an upstream side of the second heater.   
     
     
         23 . The steam turbine plant according to  claim 17 , wherein
 a property of the working fluid flowing into the steam turbine is restrained from varying, by adjusting at least one or more of a flow rate of the working fluid, a received heat quantity from the third heat source or from the fifth heat source, and a rate between flowrates of the working fluid to parallel flow paths.   
     
     
         24 . The steam turbine plant according to  claim 19 , wherein
 a property of the working fluid flowing into the steam turbine is restrained from varying, by adjusting at least one or more of a flow rate of the working fluid, and a received heat quantity from the third heat source or from the fifth heat source.   
     
     
         25 . The steam turbine plant according to  claim 9 , wherein
 the fourth heat source uses a heat source storing a solar heat.   
     
     
         26 . The steam turbine plant according to  claim 9 , wherein:
 the heating unit includes a fourth heater using the fourth heat source and a fifth heater using the fifth heat source; and   all or a part of the fourth heater and the fifth heater are arranged in parallel with respect to the working fluid.   
     
     
         27 . The steam turbine plant according to  claim 9 , wherein:
 the heating unit includes a second heater using the second heat source and a fifth heater using the fifth heat source; and   all or a part of the second heater and the fifth heater are arranged in parallel with respect to the working fluid.   
     
     
         28 . The steam turbine plant according to  claim 9 , wherein:
 the heating unit includes a fourth heater using the fourth heat source and a fifth heater using the fifth heat source; and   all or a part of the fourth heater and the fifth heater are arranged in series with respect to the working fluid.   
     
     
         29 . The steam turbine plant according to  claim 28 , wherein
 the fifth heater is arranged on an upstream side of the fourth heater.   
     
     
         30 . The steam turbine plant according to  claim 9 , wherein
 the heating unit includes a second heater using the second heat source and a fifth heater using the fifth heat source; and   all or a part of the second heater and the fifth heater are arranged in series with respect to the working fluid.   
     
     
         31 . The steam turbine according to  claim 30 , wherein
 the fifth heater is arranged on an upstream side of the second heater.   
     
     
         32 . The steam turbine plant according to  claim 18 , wherein
 a property of the working fluid flowing into the steam turbine is restrained from varying, by adjusting at least one or more of a flow rate of the working fluid, a received heat quantity from the third heat source or from the fifth heat source, and a rate between flowrates of the working fluid to parallel flow paths.   
     
     
         33 . The steam turbine plant according to  claim 26 , wherein
 a property of the working fluid flowing into the steam turbine is restrained from varying, by adjusting at least one or more of a flow rate of the working fluid, a received heat quantity from the third heat source or from the fifth heat source, and a rate between flowrates of the working fluid to parallel flow paths.   
     
     
         34 . The steam turbine plant according to  claim 17 , wherein
 a property of the working fluid flowing into the steam turbine is restrained from varying, by adjusting at least one or more of a flow rate of the working fluid, a received heat quantity from the third heat source or from the fifth heat source, and a rate between flowrates of the working fluid to parallel flow paths.   
     
     
         35 . The steam turbine plant according  claim 21 , wherein
 a property of the working fluid flowing into the steam turbine is restrained from varying, by adjusting at least one or more of a flow rate of the working fluid, and a received heat quantity from the third heat source or from the fifth heat source.   
     
     
         36 . The steam turbine plant according  claim 28 , wherein
 a property of the working fluid flowing into the steam turbine is restrained from varying, by adjusting at least one or more of a flow rate of the working fluid, and a received heat quantity from the third heat source or from the fifth heat source.   
     
     
         37 . The steam turbine plant according  claim 30 , wherein
 a property of the working fluid flowing into the steam turbine is restrained from varying, by adjusting at least one or more of a flow rate of the working fluid, and a received heat quantity from the third heat source or from the fifth heat source.