A composite energy system and method integrating multi-energy storage and hydrocarbon fuel preparation

Abstract

The invention discloses a composite energy system and method integrating multi-energy storage and hydrocarbon fuel preparation, including a compressed air thermochemical energy storage hydrogen production system and an internal combustion engine-turbine energy release hydrogen production system; The coupling of air and endothermic chemical reactions not only realizes the mixed storage of physical / chemical energy, but also improves the energy grade of compression heat; in the stage of energy release, gaseous fuel and air are burned in the internal combustion engine to generate electricity, and the waste heat generated is stored After the high-pressure air is recovered, it enters the turbine to generate electricity, realizing the cascade utilization of energy; in the energy storage and energy release stages, hydrogen is used as the carrier to realize the conversion of low-grade heat energy into fuel high-grade chemical energy, and realize the integration of energy storage and hydrogen production While using the application mode, the energy utilization efficiency of the system is improved.

Description

technical field [0001] The invention belongs to the technical field of energy storage and hydrocarbon fuel preparation, and in particular relates to a composite energy system and method integrating multi-energy storage and hydrocarbon fuel preparation. Background technique [0002] Due to the exhaustion of traditional fossil energy such as oil and coal, as well as the increasingly serious problems of environmental pollution and ecological damage, countries around the world have focused on the efficient use of traditional fossil energy and the sustainable development of clean new energy. Although a high proportion of new energy power supply has become the consensus of all countries in the world, the inherent volatility and uncertainty of new energy power generation will inevitably lead to large frequency fluctuations in the power grid. The random fluctuation characteristics of the power load during the operation of the power system and the unpredictability of the grid connect...

AI Technical Summary

Problems solved by technology

However, the existing compressed air energy storage technology has a technical bottleneck of large loss of available energy in terms of storage and utilization of compression heat, which reduces the energy efficiency and energy storage density of compressed air energy storage technology: traditional supplementary combustion compressed air energy storage technology Directly discharge the heat of compression to the atmosphere; although the advanced adiabatic compressed air energy storage system uses the heat accumulator to store the heat of compression, the energy grade of the heat of compression is reduced due to the inevitable heat exchange temperature difference in the heat exchange process; isothermal The compressed air energy storage system can use all the heat of compression for the expansion process, but the technology is complex and it is difficult to store it efficiently

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