Describe a closed cycle gas turbine power plant and its characteristics with a neat sketch.

A closed-cycle gas turbine power plant is a type of power generation system where the working fluid (usually a gas such as helium, air, or carbon dioxide) is continuously recirculated within a closed loop. Unlike an open-cycle gas turbine, where fresh air is taken in and exhaust gases are released into the atmosphere, a closed-cycle system operates with the same working fluid, which is reheated and reused. This results in higher efficiency, better control of working fluid properties, and reduced environmental impact.  

### Working Principle of Closed-Cycle Gas Turbine  
The closed-cycle gas turbine operates on the Brayton cycle, which consists of four major thermodynamic processes:  
1. Isentropic Compression (Process 1-2): The working fluid is compressed in a compressor, increasing its pressure and temperature.  
2. Isobaric Heat Addition (Process 2-3): The high-pressure fluid enters a heat exchanger (heater), where ______ __________ ______ ___ ______ ______ ________ ___.
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