Solar-gas combined cycle electrical generating system

• US 5,444,972 A
• Filed: 04/12/1994
• Issued: 08/29/1995
• Est. Priority Date: 04/12/1994
• Status: Expired due to Term

• Current Assignee: Aerojet Rocketdyne Of De, Inc. (L3Harris Technologies, Inc.)
• Original Assignee: Rockwell International Corporation
• Inventors: Moore, Roger M.
• Primary Examiner(s): Casaregola, Louis J.
• Application Number:
  US08/226,744
• Time in Patent Office: 504 Days
• Field of Search: 60/39.182, 60/39.33, 60/641.8, 60/641.11, 60/641.12, 60/641.13, 60/641.14, 60/641.15, 60/698
• US Class Current: 60/39.182
• CPC Class Codes: F02C 1/05 characterised by the type or source of heat, e.g. using nuclear or solar energy
• CPC Class Codes: F03G 6/04 gaseous F03G6/064, F03G6/068 take precedence
• CPC Class Codes: F03G 6/067 Binary cycle plants where the fluid from the solar collector heats the working fluid via a heat exchanger
• CPC Class Codes: F24S 20/20 Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
• CPC Class Codes: Y02E 10/40 Solar thermal energy, e.g. solar towers
• CPC Class Codes: Y02E 10/46 Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines

Abstract

A design of a power plant which uses hydrocarbon fuels in conjunction with solar power to produce electricity. The power plant consists of an array of heliostats for concentrating sunlight on a central solar receiver. The heat energy thus gathered is used to create steam which runs a steam turbine. Steam to run the steam turbine can alternately or modularly be obtained from the exhaust gas of a turbo-burner and fuel added to a furnace. The solar energy gathered may be stored as hot fluid in a thermal storage tank or used immediately in the power plant. A thermal shield may be employed over the solar central receiver to insulate the solar central receiver, provide leak and fire protection and shield the solar central receiver from solar radiation.

Claims

1. An electric power generation system comprising:

a gas turbo-burner turbine generator for generation electricity from a combustible fluid,

the turbo-burner turbine generator having a turbine,

the turbo-burner turbine generator having hot exhaust gas emitted from the turbine,

a primary furnace for receiving hot exhaust gas emitted from the gas turbo-burner turbine generator,

the primary furnace having a heat exchanger for heating a heat transporting fluid from the gas turbo-burner turbine generator exhaust gas,

the primary furnace having a fuel source for burning fuel to add heat to the heat exchanger and creating more thermal energy,

a steam generator for generating steam, the steam generator receiving heat from the heat transporting fluid,

a steam turbine-generator for generating electricity, the steam turbine-generator running on steam from the steam generator,

a solar central receiver for receiving sunlight,

a heliostat for concentrating sunlight on the solar central receiver for heating the solar central receiver,

the solar central receiver having a heat exchanger for transferring heat generated by the sunlight to the heat transport fluid, said heat transport fluid communicating with the steam generator for generation of steam in the steam generator, and selectively communicating with the primary furnace heat exchanger by use of a valve.

2. An electric power generation system as in claim 1 wherein;

there is a heat shield for placing over the solar collector to reduce the solar radiation striking the solar collector.

3. An electric power generation system as in claim 2 wherein;

the heat shield has insulation for preventing the solar collector from cooling off.

4. An electric power generation system as in claim 2 wherein;

there is a means for a fire suppressant system in the heat shield to control and suppress fires, oxidation, and chemical reactions in the solar central receiver.

5. An electric power generation system as in claim 1 wherein;

a thermal storage tank for storing the hot heat transfer fluid, is connected to the solar central receiver and to the primary furnace,

the thermal storage tank is also connected to the steam generator such that the stored hot heat transfer fluid supplies heat to the steam generator when solar energy to the solar central receiver or is absent.