초록 ▼

A method is provided for implementing a thermodynamic cycle with district water heating capabilities that combines a simplified Kalina bottoming cycle with a district water heating plant. The preferred method includes pressurizing, vaporizing and superheating a mixture working fluid (e.g., H2O/NH3)

A method is provided for implementing a thermodynamic cycle with district water heating capabilities that combines a simplified Kalina bottoming cycle with a district water heating plant. The preferred method includes pressurizing, vaporizing and superheating a mixture working fluid (e.g., H2O/NH3) using gas turbine exhaust energy in a heat recovery vapor generator, expanding the working fluid in a turbine to produce power, and then transferring the working fluid thermal energy to the district water by condensing the working fluid in a single stage condenser. The method can also include systems that efficiently use excess thermal energy only when the district water heating demand is low, e.g., during summer months. The method according to the invention provides for economically significant increases in district water heating efficiency as compared to conventional Rankine cycles with district water heating, while decreasing the cost of both the Rankine and nominal Kalina cycles using multi-component working fluids.

대표청구항 ▼

1. A method for increasing the thermal efficiency of a combined cycle power plant using excess thermal energy to treat a municipal water source, comprising the steps of:a. vaporizing and superheating a multi-component working fluid by transferring thermal energy from a gas turbine exhaust to said wo

1. A method for increasing the thermal efficiency of a combined cycle power plant using excess thermal energy to treat a municipal water source, comprising the steps of:a. vaporizing and superheating a multi-component working fluid by transferring thermal energy from a gas turbine exhaust to said working fluid in a heat recovery vapor generator; b. first expanding the working fluid through a high pressure turbine to produce electric energy and a heat source for a downstream regenerative economizer and a regenerative boiler; c. transferring thermal energy from the outlet of said high pressure turbine to said working fluid through said regenerative economizer and said regenerative boiler; and d. condensing said working fluid by transferring thermal energy to said municipal water source.