초록 ▼

A method of recovering energy from a cool compressed gas, compressed liquid, vapor, or supercritical fluid is disclosed which includes incrementally expanding the compressed gas, compressed liquid, vapor, or supercritical fluid through a plurality of expansion engines and heating the gas, vapor, com

A method of recovering energy from a cool compressed gas, compressed liquid, vapor, or supercritical fluid is disclosed which includes incrementally expanding the compressed gas, compressed liquid, vapor, or supercritical fluid through a plurality of expansion engines and heating the gas, vapor, compressed liquid, or supercritical fluid entering at least one of the expansion engines with a low quality heat source. Expansion engines such as turbines and multiple expansions with heating are disclosed.

대표청구항 ▼

We claim: 1. A method of recovering energy from a compressed gas, comprising incrementally expanding the compressed gas through a plurality of expansion engines and heating the gas entering at least one of the expansion engines with a low quality heat source, wherein the gas entering the expansion

We claim: 1. A method of recovering energy from a compressed gas, comprising incrementally expanding the compressed gas through a plurality of expansion engines and heating the gas entering at least one of the expansion engines with a low quality heat source, wherein the gas entering the expansion engines and the low quality heat source are less than about 250째 C. 2. The method of claim 1, wherein the compressed gas is heated at least once after expansion. 3. The method of claim 1, wherein the compressed gas is both heated and expanded at least twice. 4. The method of claim 1, wherein the compressed gas is expanded at least three times and heated at least twice. 5. The method of claim 1, wherein the energy is recovered in a power plant and at least some of the expansion engines are turbines. 6. The method of claim 1, wherein the compressed gas is provided by the compression stripping of CO2 from flue gas in a power plant. 7. The method of claim 6, wherein the compressed gas for the power plant is at a pressure of not less than about 1,000 psia. 8. The method of claim 6, wherein the compressed gas from the power plant is at a pressure of not less than about 5,000 psia. 9. The method of claim 6, wherein the low quality heat is provided from a cooling water in a power plant. 10. The method of claim 9, wherein the low quality heat is provided from a flue gas condensate in a power plant. 11. The method of claim 9, wherein the temperature difference between the low quality heat source and the gas being heated therewith is less than about 350째 C. 12. A method of recovering energy from a compressed remediated flue gas substantially free of CO2, SO2 and H2O at a pressure of not less than about 1000 psia, comprising incrementally expanding the compressed gas through a plurality of turbines and heating the gas entering at least one turbine by passing the gas in heat exchange relationship with a low quality source of heat wherein the temperature differential between the gas and the low quality source of heat is less than about 350째 C. 13. The method of claim 12, wherein the low quality heat source is a liquid in a fossil fuel power plant. 14. The method of claim 13, wherein the compressed gas is heated at least once prior to expansion. 15. The method of claim 14, wherein the compressed gas is at a pressure not less than about 5000 psia. 16. The method of claim 15, wherein the compressed gas is a remediated flue gas from a fossil fuel power plant. 17. A method of recovering energy from a compressed remediated CO2 supercritical fluid, liquid, or vapor stream, comprising: incrementally expanding the compressed supercritical-fluid/vapor/liquid through a plurality of turbines and heating the vapor/liquid entering at least one turbine by passing the supercritical-fluid/liquid/vapor in heat exchange relationship with a low quality source of heat wherein the temperature differential between the supercritical-fluid/liquid/vapor and the low quality source of heat is less than about 350째 C. and the remediated CO2 is at a pressure of not less than about 1106 psia. 18. The method of claim 17, wherein the low quality heat source is a cooling liquid in a fossil fuel power plant. 19. The method of claim 18, wherein the compressed supercritical-fluid/liquid/vapor is heated at least once prior to expansion. 20. The method of claim 1, wherein the compressed gas are compressed flue gases.