Combined System of intercooled Recuperative Gas Turbine and Organic Compound Bottoming Cycle

Abstract

The invention discloses a combined system of intercooled recuperative gas turbine and organic compound bottoming cycle, comprising intercooled recuperative gas turbine, organic-gas heater, organic working substance turbine, condenser and pressure pump, the organic-gas heater is connected to recuperator of intercooled recuperative gas turbine, the organic-gas heater is connected to organic working substance turbine, the organic working substance turbine is connected to condenser, the condenser is connected to pressure pump, the pressure pump is connected to intercooler of intercooled recuperative gas turbine, the intercooler is connected to organic-gas heater; by adopting the invention, it can overcome problems of insufficient heat exchange and large exergy loss in intercooler caused by constant evaporation temperature when using subcritical organic Rankine cycle and Kalina cycle, and can also ensure that the entire system maintains a higher power generation efficiency than intercooled recuperative gas turbine and improves gas turbine power output in hot climates.

Description

BACKGROUND OF THE INVENTION1. Field of the Invention[0001]The invention relates to gas turbine, in particular to a combined system of intercooled recuperative gas turbine and organic compound bottoming cycle.2. Description of the Related Art[0002]Since the invention of the gas turbine in the 1930s, as an important engine, it has been widely used in aviation, marine propulsion, and land-based power plants. Gas turbines adopting the air Brayton cycle have higher thermal efficiency and output power, and measures to continue to improve the cycle efficiency include increasing turbine inlet temperature, adding reheating, intercooling and regeneration devices, injecting steam into the turbine, adding the steam Rankine cycle as the bottoming cycle, and etc.[0003]In terms of the power of marine gas turbines, in order to improve the efficiency of marine gas turbines, in 1946, the Rolls-Royce Holdings PLC signed a contract with the British Navy for the production of ship intercooled recuperati...

AI Technical Summary

Benefits of technology

The invention uses a supercritical organic Rankine cycle as the bottoming cycle of a combined system, which eliminates issues with traditional methods such as constant evaporation temperature and large exergy loss. This results in more efficient power generation and comparable performance to standard three pressure reheat gas-steam combined cycles. Additionally, the invention saves water resources and is suitable for arid areas and marine propulsion. The supercritical organic Rankine cycle is further cascaded with a vapor compression refrigeration cycle to adjust the temperature of the intercooled recuperative gas turbine and intercooler coolant, ensuring stable output and efficiency under extreme weather conditions. The invention also has faster start-up and better performance under partial load.

Problems solved by technology

Moreover, whether using the subcritical organic Rankine cycle as the bottoming cycle of the intercooled recuperative gas turbine and form a combined system with intercooled recuperative gas turbine, using Kalina cycle ammonia water as the bottoming cycle of the intercooled recuperative gas turbine and form a combined system with intercooled recuperative gas turbine, or adopting gas-steam combined cycle power system, it cannot overcome the problems that the gas turbine is very sensitive to the external atmosphere, and the power output will be significantly reduced in the hot and humid summer.

Images