Natural gas power generation unit cogeneration, also known as gas cogeneration system, is a power generation method that uses natural gas as fuel and utilizes waste heat for energy recovery and utilization during the power generation process. The basic principle is as follows:
1. Combustion power generation: Natural gas is burned as fuel and converted into mechanical energy through a gas engine or gas turbine, driving the rotor of the generator to rotate.
2. Power output: Generators convert mechanical energy into electrical energy, generate alternating or direct current, and input it into the power grid or supply it to users.
3. Waste heat recovery: A large amount of waste heat is generated during the gas power generation process, which is mostly directly discharged in conventional power plants. The cogeneration system uses heat exchangers to recover waste heat.
4. Thermal energy utilization: The recovered waste heat can be used for heating, steam supply, or other industrial processes. For example, waste heat can be used for boiler heating, refrigeration, heating, or industrial heating, improving energy efficiency.
Through the cogeneration system, natural gas power generation units can not only provide electricity, but also fully utilize waste heat to achieve comprehensive energy utilization, thereby improving overall energy utilization efficiency. At the same time, the cogeneration system also has environmental and economic benefits, which can reduce greenhouse gas emissions and save energy resources.