Steam generation system

Abstract

A steam generation system of an embodiment has a first to fourth heating units. The first heating unit heats a first heat medium by collected solar heat. The second heating unit heats a second heat medium different from the first heat medium by the collected solar heat. The third heating unit heats water or steam by heat of the heated second heat medium. The fourth heating unit further heats the heated water or steam by heat of the heated first heat medium so as to generate steam which is further increased in temperature.

What is claimed is: 
     
         1 . A steam generation system, comprising:
 a first heating unit heating a first heat medium by collected solar heat;   a second heating unit heating a second heat medium different from the first heat medium by collected solar heat;   a third heating unit heating water or steam by heat of the heated second heat medium; and   a fourth heating unit further heating the heated water or steam by heat of the heated first heat medium so as to generate steam which is increased in temperature.   
     
     
         2 . A steam generation system, comprising:
 a first heating unit heating a first heat medium by collected solar heat;   a fifth heating unit heating water or steam by collected solar heat; and   a fourth heating unit further heating the heated water or steam by heat of the heated first heat medium so as to generate steam which is increased in temperature.   
     
     
         3 . The steam generation system according to  claim 1 , further comprising:
 a first circulation channel circulating the second heat medium between the second heating unit and the third heating unit;   a first storage unit for storing the second heat medium to be circulated;   a second circulation channel constituted of a first branch channel branching from a first branch point on the first circulation channel, passing through the first storage unit without passing through the second heating unit and the third heating unit, and further connected to a second branch point on the first circulation channel, a part of the first circulation channel connected from the second branch point to the second heating unit, the second heating unit, and a part of the first circulation channel from the second heating unit to the first branch point; and   a third circulation channel constituted of the first branch channel, a part of the first circulation channel connected from the first branch point to the third heating unit, the third heating unit, and a part of the first circulation channel from the third heating unit to the second branch point.   
     
     
         4 . The steam generation system according to  claim 1 , further comprising:
 a first circulation channel circulating the second heat medium between the second heating unit and the third heating unit;   a first heat storage unit for storing heat of the second heat medium to be circulated;   a fourth circulation channel constituted of a second branch channel branching from a third branch point on the first circulation channel, passing through the first heat storage unit without passing through the second heating unit and the third heating unit, and further connected to a fourth branch point on the first circulation channel, a part of the first circulation channel connected from the fourth branch point to the second heating unit, the second heating unit, and a part of the first circulation channel from the second heating unit to the third branch point; and   a fifth circulation channel constituted of the second branch channel, a part of the first circulation channel connected from the third branch point to the third heating unit, the third heating unit, and a part of the first circulation channel from the third heating unit to the fourth branch point.   
     
     
         5 . The steam generation system according to  claim 1 , further comprising:
 a first circulation channel circulating the second heat medium between the second heating unit and the third heating unit;   a first heat exchanger through which the second heat medium to be circulated passes;   a sixth circulation channel constituted of a third branch channel branching from a fifth branch point on the first circulation channel, passing through the first heat exchanger without passing through the second heating unit and the third heating unit, and further connected to a sixth branch point on the first circulation channel, a part of the first circulation channel connected from the sixth branch point to the second heating unit, the second heating unit, and a part of the first circulation channel from the second heating unit to the fifth branch point;   a seventh circulation channel constituted of the third branch channel, a part of the first circulation channel connected from the fifth branch point to the third heating unit, the third heating unit, and a part of the first circulation channel from the third heating unit to the sixth branch point; and   a first and second heat storage tanks each capable of storing a third heat medium,   wherein the third heat medium is transferred through:
 a first transport path from the first heat storage tank to the second heat storage tank via the first heat exchanger to exchange heat with the second heat medium; or 
 a second transport path from the second heat storage tank to the first heat storage tank via the first heat exchanger to exchange heat with the second heat medium. 
   
     
     
         6 . The steam generation system according to  claim 2 , further comprising:
 a first transfer channel passing through the fifth heating unit and transferring heated water or steam to the fourth heating unit;   a second storage unit for storing the transferred water or steam; and   a second transfer channel branching from the first transfer channel and passing through the second storage unit, and guiding water or steam from the second storage unit to the fourth heating unit.   
     
     
         7 . The steam generation system according to  claim 2 , further comprising:
 a first transfer channel passing through the fifth heating unit and transferring heated water or steam to the fourth heating unit;   a second heat storage unit for storing heat of the transferred water or steam; and   a third transfer channel branching from the first transfer channel and passing through the second heat storage unit, and guiding water or steam from the second heat storage unit to the fourth heating unit.   
     
     
         8 . The steam generation system according to  claim 1 ,
 wherein the second heat medium is oil.   
     
     
         9 . The steam generation system according to  claim 1 , further comprising:
 a tower-type heat collector having the first heating unit; and   a trough-type heat collector having the second heating unit.   
     
     
         10 . The steam generation system according to  claim 1 , further comprising
 a tower-type heat collector having the first and second heating units.   
     
     
         11 . The steam generation system according to  claim 2 , further comprising:
 a tower-type heat collector having the first heating unit; and   a trough-type heat collector having the fifth heating unit.   
     
     
         12 . The steam generation system according to  claim 2 , further comprising
 a tower-type heat collector having the first and fifth heating units.   
     
     
         13 . The steam generation system according to  claim 1 , further comprising:
 an eighth circulation channel circulating the first heat medium between the first heating unit and the fourth heating unit;   a third storage unit for storing the first heat medium to be circulated;   a ninth circulation channel constituted of a fourth branch channel branching from a seventh branch point on the eighth circulation channel, passing through the third storage unit without passing through the first heating unit and the fourth heating unit, and further connected to an eighth branch point on the eighth circulation channel, a part of the eighth circulation channel connected from the eighth branch point to the first heating unit, the first heating unit, and a part of the eighth circulation channel from the first heating unit to the seventh branch point; and   a tenth circulation channel constituted of the fourth branch channel, a part of the eighth circulation channel connected from the seventh branch point to the fourth heating unit, the fourth heating unit, and a part of the eighth circulation channel from the fourth heating unit to the eighth branch point.   
     
     
         14 . The steam generation system according to  claim 1 , further comprising:
 an eighth circulation channel circulating the first heat medium between the first heating unit and the fourth heating unit;   a third heat storage unit for storing heat of the first heat medium to be circulated;   an eleventh circulation channel constituted of a fifth branch channel branching from a ninth branch point on the eighth circulation channel, passing through the third heat storage unit without passing through the first heating unit and the fourth heating unit, and further connected to a tenth branch point on the eighth circulation channel, a part of the eighth circulation channel connected from the tenth branch point to the first heating unit, the first heating unit, and a part of the eighth circulation channel from the first heating unit to the ninth branch point; and   a twelfth circulation channel constituted of the fifth branch channel, a part of the eighth circulation channel connected from the ninth branch point to the fourth heating unit, the fourth heating unit, and a part of the eighth circulation channel from the fourth heating unit to the tenth branch point.   
     
     
         15 . The steam generation system according to  claim 1 , further comprising:
 an eighth circulation channel circulating the first heat medium between the first heating unit and the fourth heating unit;   a second heat exchanger through which the first heat medium to be circulated passes;   a thirteenth circulation channel constituted of a sixth branch channel branching from an eleventh branch point on the eighth circulation channel, passing through the second heat exchanger without passing through the first heating unit and the fourth heating unit, and further connected to a twelfth branch point on the eighth circulation channel, a part of the eighth circulation channel connected from the twelfth branch point to the first heating unit, the first heating unit, and a part of the eighth circulation channel from the first heating unit to the eleventh branch point;   a fourteenth circulation channel constituted of the sixth branch channel, a part of the eighth circulation channel connected from the eleventh branch point to the fourth heating unit, the fourth heating unit, and a part of the eighth circulation channel from the fourth heating unit to the twelfth branch point; and   a third and fourth heat storage tanks each capable of storing a fourth heat medium,   wherein the fourth heat medium is transferred through:
 a third transport path from the third heat storage tank to the fourth heat storage tank via the second heat exchanger to exchange heat with the second heat medium; or 
 a fourth transport path from the fourth heat storage tank to the third heat storage tank via the second heat exchanger to exchange heat with the second heat medium. 
   
     
     
         16 . The steam generation system according to  claim 1 ,
 wherein the first heat medium is a molten salt.   
     
     
         17 . The steam generation system according to  claim 2 , further comprising:
 an eighth circulation channel circulating the first heat medium between the first heating unit and the fourth heating unit;   a third storage unit for storing the first heat medium to be circulated;   a ninth circulation channel constituted of a fourth branch channel branching from a seventh branch point on the eighth circulation channel, passing through the third storage unit without passing through the first heating unit and the fourth heating unit, and further connected to an eighth branch point on the eighth circulation channel, a part of the eighth circulation channel connected from the eighth branch point to the first heating unit, the first heating unit, and a part of the eighth circulation channel from the first heating unit to the seventh branch point; and   a tenth circulation channel constituted of the fourth branch channel, a part of the eighth circulation channel connected from the seventh branch point to the fourth heating unit, the fourth heating unit, and a part of the eighth circulation channel from the fourth heating unit to the eighth branch point.   
     
     
         18 . The steam generation system according to  claim 2 , further comprising:
 an eighth circulation channel circulating the first heat medium between the first heating unit and the fourth heating unit;   a third heat storage unit for storing heat of the first heat medium to be circulated;   an eleventh circulation channel constituted of a fifth branch channel branching from a ninth branch point on the eighth circulation channel, passing through the third heat storage unit without passing through the first heating unit and the fourth heating unit, and further connected to a tenth branch point on the eighth circulation channel, a part of the eighth circulation channel connected from the tenth branch point to the first heating unit, the first heating unit, and a part of the eighth circulation channel from the first heating unit to the ninth branch point; and   a twelfth circulation channel constituted of the fifth branch channel, a part of the eighth circulation channel connected from the ninth branch point to the fourth heating unit, the fourth heating unit, and a part of the eighth circulation channel from the fourth heating unit to the tenth branch point.   
     
     
         19 . The steam generation system according to  claim 2 , further comprising:
 an eighth circulation channel circulating the first heat medium between the first heating unit and the fourth heating unit;   a second heat exchanger through which the first heat medium to be circulated passes;   a thirteenth circulation channel constituted of a sixth branch channel branching from an eleventh branch point on the eighth circulation channel, passing through the second heat exchanger without passing through the first heating unit and the fourth heating unit, and further connected to a twelfth branch point on the eighth circulation channel, a part of the eighth circulation channel connected from the twelfth branch point to the first heating unit, the first heating unit, and a part of the eighth circulation channel from the first heating unit to the eleventh branch point;   a fourteenth circulation channel constituted of the sixth branch channel, a part of the eighth circulation channel connected from the eleventh branch point to the fourth heating unit, the fourth heating unit, and a part of the eighth circulation channel from the fourth heating unit to the twelfth branch point; and   a third and fourth heat storage tanks each capable of storing a fourth heat medium,   wherein the fourth heat medium is transferred through:
 a third transport path from the third heat storage tank to the fourth heat storage tank via the second heat exchanger to exchange heat with the second heat medium; or 
 a fourth transport path from the fourth heat storage tank to the third heat storage tank via the second heat exchanger to exchange heat with the second heat medium. 
   
     
     
         20 . The steam generation system according to  claim 2 ,
 wherein the first heat medium is a molten salt.