Heat pump type-hydrogen energy composite energy storage power generation method and device
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A composite energy storage and power generation device technology, applied in energy storage, steam engine devices, circuits, etc., can solve problems such as low conversion efficiency and achieve the effect of improving power generation efficiency
Active Publication Date: 2021-10-22
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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[0004]
The purpose of the present invention is to provide a high-efficiency heat pump-hydrogen energy composite energy storage power generation method and device including heating function, so as to overcome the disadvantage of low conversion efficiency of the traditional electric heating heat storage medium energy storage method
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no. 1 example
[0035] First Embodiment Heat Pump-Hydrogen Energy Composite Energy Storage Power Generation Method
[0036] Figure 1-Figure 2 It is a schematic diagram of a heat pump-hydrogen composite energy storage power generation method according to the first embodiment of the present invention, the method includes an energy storage mode and a power generation mode. In this embodiment, the energy storage mode is the energy storage hydrogen production mode.
[0037] Such as figure 1 Shown is a schematic diagram of the energy storage hydrogen production mode of the heat pump-hydrogen energy composite energy storage power generation method of the present invention. In the energy storage hydrogen production mode, the system absorbs dry air from the air intake device 1 from the outside (take air as an example) as the normal temperature working medium, the working medium is gas, and the normal temperature working medium enters the regenerative heat exchanger 2 to do the Pressure absorption,...
no. 2 example
[0042] The second embodiment heat pump type-hydrogen energy composite energy storage power generation device
[0043] We define the following symbols:
[0044] The low temperature point of the main heat storage system 8, unit: K;
[0045] High temperature point of the main heat storage system 8, unit: K;
[0046] T 0 : the low temperature point of the cold storage system 19, unit: K;
[0047] T 1 : High temperature point of regenerative heat storage system 7, unit: K;
[0048] T air : normal air temperature, unit: K, which is also the high temperature point of the cold storage system 19;
[0049] T air +ΔT: low temperature point of regenerative heat storage system 7, unit: K;
[0050] The inlet temperature of the waste heat boiler 21 in the energy storage hydrogen production mode, unit: K;
[0051] Inlet temperature of turbine 5 in energy storage hydrogen production mode, unit: K;
[0052] The outlet temperature of compressor 3 in the energy storage hydroge...
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Abstract
The invention provides a heat pump type-hydrogen energy composite energy storage power generation method. In an energy storage hydrogen production mode, a normal-temperature working medium is subjected to adiabatic compression through a compressor and then releases heat through a hydrogen energy system, and at the moment, the hydrogen energy system produces hydrogen; then the main heat storage system carries out an isobaric heat release process to complete heat storage and energy storage, the working medium enters a turbine to carry out adiabatic expansion to do work outwards, and finally, the discharged working medium circulates or is released to the outside; in a power generation mode, a normal-temperature working medium is subjected to adiabatic compression through the compressor and then is subjected to isobaric heat absorption through the main heat storage system; one path of the working medium enters a turbine to adiabatically expand to apply work outwards, and the other path of the working medium releases heat through a hydrogen energy system; and at the moment, the hydrogen energy system generates power, and finally, the working medium circulates or is released to the outside. The invention further provides a corresponding device. According to the energy storage power generation method, high-temperature heat is provided for the fuel cell while Brayton cycle power generation is carried out, so that the power generation efficiency of the hydrogen energy system is remarkably improved.
Description
technical field [0001] The invention relates to a method and device for energy storage and power supply, in particular to a heat pump-hydrogen energy composite energy storage and power generation method and device. Background technique [0002] Green energy represented by solar energy, wind energy, and hydraulic potential energy has environmental protection and inexhaustible advantages. However, because green energy is generally affected by natural conditions such as weather, seasons, and sunlight, it is difficult to provide stable energy output, so it is difficult to output Electricity that matches the grid. Therefore, it is a better solution to adopt certain energy storage technology and exchange space for time. Physical energy storage represented by molten salt energy storage is relatively low-cost, high-efficiency, and simple in structure. At present, heat storage is mainly carried out by means of electric heating or heat transfer medium by electric heating. But the d...
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