Solar Thermal Electric Power Generation System and Heating Medium Supply System

• US 20100175365A1
• Filed: 10/20/2006
• Published: 07/15/2010
• Est. Priority Date: 08/10/2006
• Status: Active Grant

• Current Assignee: Kawasaki Jukogyo Kabushiki Kaisha
• Original Assignee: Kawasaki Jukogyo Kabushiki Kaisha
• Inventors: Ota, Hideaki
• Granted Patent: US 8,468,827 B2
• Time in Patent Office: Days
• US Class Current: 60/39.181
• CPC Class Codes: F01K 23/10 with exhaust fluid of one cycle heating the fluid in another cycle F01K17/025 takes precedence
• CPC Class Codes: F03G 6/005 Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
• CPC Class Codes: F24S 23/74 with trough-shaped or cylindro-parabolic reflective surfaces
• CPC Class Codes: F24S 90/00 Solar heat systems not otherwise provided for
• CPC Class Codes: F28F 27/02 for controlling the distribution of heat-exchange media between different channels static flow control means in header boxes F28F9/026; arrangements of guide plates or guide vanes F28F9/22, F28F25/12
• CPC Class Codes: Y02E 10/46 Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
• CPC Class Codes: Y02E 20/16 Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Abstract

A heating medium supply system is provided which is capable of sufficiently suppressing a temperature fluctuation of a heating medium, by the time when a heat exchanging device recovers heat of the heating medium, by leveling the temperature fluctuation fluctuating inevitably with time. The heating medium supply system includes: a heat collecting unit configured to heat a liquid heating medium by sunlight; a heat exchanging device configured to heat water supplied thereto by means of the heating medium supplied thereto from the heat collecting unit; heating medium supply piping for supplying the heating medium from the heat collecting unit to the heat exchanging device; and a heating medium heater for heating the heating medium and a temperature measuring device configured to measure a temperature of the heating medium, which are provided on the heating medium supply piping.

Claims

1. A heating medium supply system comprising:

a heating system configured to heat a liquid heating medium by sunlight;

a heat exchanging device configured to heat water supplied thereto by means of the heating medium supplied thereto from said heating system;

a heating medium supply passage for supplying the heating medium from said heating system to said heat exchanging device; and

a heater for heating the heating medium and a temperature measuring device configured to measure a temperature of the heating medium, which are provided on said heating medium supply passage.

2. The heating medium supply system according to claim 1, wherein said heater is configured to operate so that the temperature of the heating medium to be measured by said temperature measuring device does not fall below a predetermined temperature.

3. The heating medium supply system according to claim 1, wherein:

said heating medium supply passage is provided with a temperature fluctuation suppressing device for suppressing a temperature fluctuation of the heating medium; and

said temperature fluctuation suppressing device has plural heating medium passages allowing the heating medium to pass therethrough, and an inlet and an outlet for the heating medium, whereby the heating medium flowing into said temperature fluctuation suppressing device from said heating medium supply passage through said inlet is allowed to pass through said plural heating medium passages at time-lags to form respective streams, which are then joined together before flowing out of said temperature fluctuation suppressing device into said heating medium supply passage through said outlet.

4. The heating medium supply system according to claim 1, wherein said heater has plural heating medium passages allowing the heating medium to pass therethrough, an inlet and an outlet for the heating medium, and heating means for heating the heating medium passing through said plural heating medium passages, whereby the heating medium flowing into said heater from said heating medium supply passage through said inlet is allowed to pass through said plural heating medium passages at time-lags to form respective streams, which are then joined together before flowing out of said heater into said heating medium supply passage through said outlet.

5. A solar thermal electric power generation system comprising:

a steam turbine;

a heating medium supply system having a heat exchanging device for generating steam to be supplied to said steam turbine and configured to supply said heat exchanging device with a heating medium for heating water therein; and

a steam supply passage for supplying steam from said heat exchanging device to said steam turbine, wherein

said heating medium supply system is a heating medium supply system as recited in claim 1.

6. The solar thermal electric power generation system according to claim 5, further comprising:

a gas turbine; and

a waste heat recovery boiler configured to generate steam by utilizing waste heat of said gas turbine and supply steam thus generated to said steam turbine, wherein;

said waste heat recovery boiler comprises an evaporating section having a steam drum and a superheating section; and

steam generated by heating of water supplied to said waste heat recovery boiler is supplied to said steam turbine.

7. The solar thermal electric power generation system according to claim 6, wherein said steam supply passage interconnects said heat exchanging device of said heating medium supply system and said steam drum to allow steam from said heat exchanging device and steam generated by said waste heat recovery boiler to be mixed together in said steam drum and then supplied to said steam turbine through said superheating section.

8. The solar thermal electric power generation system according to claim 6, wherein:

said evaporating section and said superheating section are interconnected through a steam passage provided with a steam mixer; and

said steam supply passage interconnects said heat exchanging device of said heating medium supply system and said steam mixer to allow steam from said heat exchanging device and steam generated by said waste heat recovery boiler to be mixed together in said steam mixer and then supplied to said steam turbine through said superheating section.

9. The solar thermal electric power generation system according to claim 7, wherein said superheating section is provided with a burner for heating steam.

10. The solar thermal electric power generation system according to claim 7, wherein:

said steam supply passage is branched into a first steam passage connected to said waste heat recovery boiler and a second steam passage connected to said steam turbine without passing through said waste heat recovery boiler; and

said second steam passage is provided with a superheating device for superheating steam.

11. An integrated solar combined cycle electric power generation system comprising:

a steam turbine;

a gas turbine;

a waste heat recovery boiler configured to generate steam by utilizing waste heat of said gas turbine and supply steam thus generated to said steam turbine;

a heating medium supply system having a heat exchanging device for generating steam to be supplied to said steam turbine and configured to supply said heat exchanging device with a heating medium for heating water therein;

a steam supply passage for supplying steam from said heat exchanging device to said steam turbine; and

a steam fluctuation suppressing device provided on said steam supply passage for suppressing a fluctuation of steam condition, wherein;

said steam fluctuation suppressing device has plural steam passages allowing steam to pass therethrough, and an inlet and an outlet for steam, whereby steam flowing into said steam fluctuation suppressing device from said steam supply passage through said inlet is allowed to pass through said plural steam passages at time-lags to form respective streams, which are then joined together before flowing out of said steam fluctuation suppressing device into said steam supply passage through said outlet; and

said heating medium supply system further comprises a heating system configured to heat a liquid heating medium by sunlight, and a heating medium supply passage for supplying the heating medium from said heating system to said heat exchanging device.

12. The integrated solar combined cycle electric power generation system according to claim 11, wherein said heating medium supply system is a heating medium supply system comprising:

a heating system configured to heat a liquid heating medium by sunlight;

a heat exchanging device configured to heat water supplied thereto by means of the heating medium supplied thereto from said heating system;

a heating medium supply passage for supplying the heating medium from said heating system to said heat exchanging device; and

a heater for heating the heating medium and a temperature measuring device configured to measure a temperature of the heating medium, which are provided on said heating medium supply passage.

13. The integrated solar combined cycle electric power generation system according to claim 12, wherein:

said waste heat recovery boiler comprises an evaporating section having a steam drum, and a superheating section;

said steam supply passage interconnects said heat exchanging device of said heating medium supply system and said steam drum to allow steam from said heat exchanging device and steam generated by said waste heat recovery boiler to be mixed together in said steam drum and then supplied to said steam turbine.

14. The integrated solar combined cycle electric power generation system according to claim 12, wherein:

said waste heat recovery boiler comprises an evaporating section having a steam drum, and a superheating section;

said evaporating section and said superheating section are interconnected through a steam passage provided with a steam mixer; and

said steam supply passage interconnects said heat exchanging device of said heating medium supply system and said steam mixer to allow steam from said heat exchanging device and steam generated by said waste heat recovery boiler to be mixed together in said steam mixer and then supplied to said steam turbine.

15. The integrated solar combined cycle electric power generation system according to claim 13 or 14, wherein said superheating section is provided with a burner for heating steam.

16. The integrated solar combined cycle electric power generation system according to claim 13, wherein:

said steam supply passage is branched into a first steam passage connected to said waste heat recovery boiler and a second steam passage connected to said steam turbine without passing through said waste heat recovery boiler; and

said second steam passage is provided with a superheating device for superheating steam.