Supercritical carbon dioxide heat supply system for peak-load shifting of distributed energy resource

Abstract

The invention discloses a supercritical carbon dioxide heat supply system for peak-load shifting of distributed energy resources. The supercritical carbon dioxide heat supply system comprises a heat pump and vortex tube system and a heat storage and supply system. According to the supercritical carbon dioxide heat supply system, surplus electric energy generated by the distributed energy resourcessuch as wind energy and solar energy is balanced out through a heat pump and the heat storage system. By means of a vortex tube, the requirement of the system for the compression ratio of a working medium compressor can be greatly lowered; cost is lowered; and practicability of the system is improved. Compared with a common heat pump heat supply system, the supercritical carbon dioxide heat supply system has the obvious beneficial effects that the actual capacity, namely consumption and absorption of the renewable energy sources, of a power grid can be greatly increased; the peak-load shifting effect is achieved; and the system contributes to pollution reduction and environmental protection.

Description

technical field [0001] The invention belongs to the field of distributed energy storage and heating, and in particular relates to a supercritical carbon dioxide heating system used for peak-shaving and valley-filling of distributed energy. Background technique [0002] Fossil energy will eventually be exhausted. At the same time, as environmental protection and pollution issues are increasingly valued by people, in recent decades, renewable energy such as wind energy, solar energy, and tidal energy have developed rapidly as clean energy, and their proportion in the world's energy structure is getting higher and higher. . The installed capacity of renewable energy in my country has increased rapidly. However, renewable energy sources such as wind energy and solar energy have discontinuous, unstable, and uncontrollable unsteady characteristics. In addition, the dislocation contradiction between the distribution of high-quality wind and light resources in my country and the di...

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Problems solved by technology

Thermal power plants are less efficient under low-load operation, resulting in increased coal consumption and pollutant emissions for power supply

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