Concentrated solar power generation using solar receivers
Inventive concentrated solar power systems using solar receivers, and related devices and methods, are generally described. Low pressure solar receivers are provided that function to convert solar radiation energy to thermal energy of a working fluid, e.g., a working fluid of a power generation or thermal storage system. In some embodiments, low pressure solar receivers are provided herein that are useful in conjunction with gas turbine based power generation systems.
1. A power generation system, comprising:
a solar receiver constructed and arranged to heat a gas at a pressure of less than or equal to 2 atmospheres;
a gas turbine;
a thermal storage unit; and
a blower; wherein
an outlet of the gas turbine and an outlet of the thermal storage unit are fluidically connected to an inlet of the blower, and an outlet of the blower is fluidically connected to an inlet of the solar receiver, such that a portion of the gas heated by the solar receiver includes one or both of an exhaust stream of the gas turbine and an exhaust stream of the thermal storage unit supplied to the solar receiver via the blower.
2. The system of claim 1 , wherein the exhaust stream of the gas turbine is not substantially further compressed before being transported to the solar receiver.
3. The system of claim 1 , wherein the system is configured to adjust a flow rate of an exhaust stream of the blower fed to the solar receiver based at least in part on a condition of a gas stream feeding the inlet of the blower.
4. The system of claim 3 , wherein the condition is the temperature of the gas stream feeding the inlet of the blower.
5. The system of claim 3 , wherein the condition is the pressure of the gas stream feeding the inlet of the blower.
6. The system of claim 3 , wherein the condition is the flow rate of the gas stream feeding the inlet of the blower.
7. The system of claim 1 , wherein a gas transported to the solar receiver from the blower has a pressure of less than 1.5 atmospheres.
8. The system of claim 7 , wherein the gas transported to the solar receiver from the blower has a pressure of less than 1.25 atmospheres.
9. The system of claim 8 , wherein the gas transported to the solar receiver from the blower has a pressure of less than 1.1 atmospheres.
10. The system of claim 1 , wherein the blower is directly fluidically connected to the solar receiver.
11. The system of claim 1 , wherein the thermal storage unit is constructed and arranged to be operated at a pressure of less than or equal to 2 atmospheres.
12. The system of claim 1 , wherein the thermal storage unit is located within a tower structure of a power tower.
13. A method of generating power, comprising:
producing power using a gas at a pressure of greater than 2 atmospheres within a gas turbine;
transporting at least a portion of an exhaust stream of the gas turbine to a blower;
transporting at least a portion of an exhaust stream of a thermal storage unit to the blower;
transporting at least a portion of an exhaust stream of the blower to a solar receiver, wherein the exhaust stream transported from the blower to the solar receiver has a pressure of less than or equal to 2 atmospheres;
heating the exhaust stream of the blower within the solar receiver to produce a heated receiver exhaust stream; and
feeding the heated receiver exhaust stream to the thermal storage unit.