System and method for fossil fuel and solar energy-complementary distributed energy supply

Abstract

The invention discloses a system and a method for fossil fuel and solar energy-complementary distributed energy supply. Natural gas enters into a gas-turbine generator set to generate electricity. Discharge smoke enters into a high pressure steam generator to form high pressure steam. The discharge smoke from the high pressure steam generator enters into a flue gas waste heat exchanger to heat heating water or is directly discharged into a chimney. The high pressure steam from the high pressure steam generator and medium pressure steam from a solar driven steam generator are poured respectively into a high pressure steam inlet and a medium pressure steam inlet of a high-pressure section turbine. Exhaust steam from the high-pressure section turbine can be fed into a steam-water type heat exchanger to heat heating water or to drive an absorption refrigerator to carry out refrigeration, and also can be fed into a low-pressure section turbine to sequentially produce expansion work. The system can realize combined supply of heat and power, can realize independent power generation, can be integrated with a solar device and can only adopt natural gas as a fuel. The system and the method fully use a solar energy resource and realize integrated utilization of fossil energy and renewable energy sources.

Description

technical field [0001] The invention relates to the field of energy technology, and is a distributed energy supply system and method that integrates key energy system technologies such as gas-steam combined cycle, solar heat utilization and combined cooling, heating and power supply, and complementary fossil fuel and solar energy. Background technique [0002] Solar energy resources are characterized by instability, discontinuity, and low energy flow density, so there are some problems in using solar energy alone for heating, cooling or power generation. When using conventional solar energy utilization methods for heating or cooling, the energy supply is unstable, and there is a contradiction between unstable and discontinuous solar energy resources and relatively stable heating and cooling demands; The solar energy is small, so it is difficult to generate electricity alone, while the conventional solar thermal power generation system often has the problems of unstable power...

AI Technical Summary

Problems solved by technology

However, most of the current distributed energy systems are only cascaded utilization of power waste heat, and rarely involve the use of renewable energy. For areas with abundant renewable energy, if they can be integrated into the distributed energy system, it will be possible. Reduce consumption of fossil energy while improving overall energy efficiency

There are abundant solar energy resources in many areas of our country, but they are only used for heating domestic hot water or heating, and there is a lack of effective utilization methods

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