Multi-grade energy inputting, coupling, storing and stable outputting system

Abstract

The invention provides a multi-grade energy inputting, coupling, storing and stable outputting system which is composed of an energy inputting device, an energy storing device, a controller, an energyoutputting and converting device and a pipe valve. The energy inputting device is a device used for directly inputting high-grade energy and inputting low-grade energy into the energy storing devicethrough a low-grade energy lifter. The energy inputting device is composed of an input energy converting device, a low-grade energy heat exchanger, a low-grade energy lifter, a series-connection one-way valve, a parallel-connection one-way valve and a high-grade energy heat exchanger. The low-grade energy lifter is a fluid pressurizing pump which raises the temperature and pressure of low-grade energy. The heating heat exchanger is an electric heater or a hot power heat exchanger. The energy storing device is a heat phase change energy storing device. The energy outputting and converting device is a heat exchange device or a hot power device. The controller controls input and output pressure, temperature, time, flow and the like through a gas liquid valve and an electric power switch. Thesystem can input and store energy of different grades and store the energy stably, and is particularly suitable for being used in distributed energy sources and mirogrids.

Description

technical field [0001] The invention belongs to the category of thermodynamics, and involves various low-grade energy and high-grade energy input, coupling, storage, and stable output technologies. Background technique [0002] Energy storage and utilization has always been a hot spot that people care about. Existing energy storage technologies include pumped water storage, compressed air energy storage, battery energy storage, superconducting energy storage, flywheel energy storage, supercapacitor energy storage, phase change heat storage However, due to factors such as capacity, energy storage period, energy density, charge and discharge efficiency, life, investment and operation costs, environmental protection, natural conditions and other factors, only pumped water storage and compressed air energy storage have been used in large-scale commercial systems. two kinds. [0003] The pumped storage power station system has the advantages of mature technology, high efficiency...

AI Technical Summary

Problems solved by technology

However, the pumped water storage power generation system requires special geographical conditions to build reservoirs and dams, and it is difficult to select a site. At the same time, the construction period is long, the investment is large, and the environmental impact is large, so it is subject to many restrictions.

[0004] Compressed air energy storage power generation system, the technology is not complicated, but usually requires suitable caves or mines to store high-pressure air, which greatly limits the development of air energy storage; now there are also compression tank energy storage devices that do not use caves or mines , but it is still in the test process; in addition, the pressure of the compressed air is constantly decreasing during the release process. Running, the fuel and compressed air are mixed and input to the gas turbine for mixed combustion, and the output power is adjusted

These processes either waste a lot of compression energy or cause environmental pollution

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