Equipment system suitable for rural carbon dioxide cycle power generation with biomass as energy

Abstract

An equipment system suitable for rural carbon dioxide cycle power generation with biomass as energy mainly comprises biomass furnace CO2 energy storage devices, a steady flow regulator, liquid CO2 storage tanks, CO2 high-pressure pumping devices, a turbine / piston expander, a generator, a regenerator, a cooler and a compressor. Outlets of the liquid CO2 storage tanks communicate with inlets of the CO2 high-pressure pumping devices. Outlets of the CO2 high-pressure pumping devices communicate with inlets of the biomass furnace CO2 energy storage devices. Outlets of the biomass furnace CO2 energy storage devices communicate with an inlet of the steady flow regulator. An outlet of the steady flow regulator communicates with an inlet of the turbine / piston expander. An outlet of the turbine / piston expander communicates with the cooler through the regenerator. An outlet of the cooler communicates with an inlet of the compressor. The equipment system suitable for rural carbon dioxide cycle power generation with the biomass as the energy has the beneficial effects that a lot of renewable biomass resources in villages can be used as the energy, operation is stable, self-energy consumption is low, the investment is low and the operation cost is low.

Description

technical field [0001] The invention relates to the field of low-carbon and energy technologies, in particular to an equipment system that uses carbon dioxide as a working medium and is suitable for rural carbon dioxide cycle power generation using biomass as an energy source. Background technique [0002] Climate change has become one of the issues that affect human survival and development, and a large amount of carbon dioxide emissions are considered to be the main cause of climate warming. As the largest developing country in the world, coal-based primary energy and firepower The secondary energy structure dominated by power generation, with the rapid growth of economic aggregate, the CO of primary energy and secondary energy 2 Emissions are characterized by rapid growth and large volumes. In response to climate change, the development of low-carbon energy, especially renewable energy and new energy, has become a consensus. Biomass power generation, solar power generatio...

AI Technical Summary

Problems solved by technology

[0004] The supercritical carbon dioxide power generation system developed with the application of CCS technology has significant advantages over traditional thermal power generation systems in terms of system thermal efficiency, total weight, floor area, and pollutant emissions, but there are still many bottlenecks in application. First, the high-efficiency heat exchanger of the existing supercritical carbon dioxide power generation system is the basis for the engineering application of the supercritical power generation system. Most of the heat exchange of the road uses a printed circuit board heat exchanger (PCHE), which is suitable for high working temperature and high working pressure, and has good expansion ability, which can meet the requirements of isobaric heating of carbon dioxide with a heat exchanger. However, the mechanism is complicated and the investment is large; secondly, the current supercritical carbon dioxide power generation system includes a heat source, a high-speed turbine, a high-speed generator, a high-speed compressor, and a cooler. The heat exchanger heats the carbon dioxide working medium at equal pressure—the working medium enters the turbine to drive the turbine to do work to drive the motor to generate electricity—the working medium enters the cooler—then enters the compressor to form a closed cycle, and the system investment is large; third, the current supercritical The carbon dioxide Brayton cycle requires the compressor parameters to be near the critical point to reduce the heat exchange end difference. The compression work of the compressor still accounts for more than 30% of the turbine output work during the compression process, and the compression work still accounts for more than 30% of the turbine output work during the actual compression process. 40% to 50% of the work, that is, the self-consumption energy of the compressor of the system is still relatively high; moreover, the high efficiency of the system cycle needs to be established when the carbon dioxide at the outlet of the condenser, that is, the suction inlet of the compressor (the starting point of the cycle) is still at 32°C , 7.4MPa at the critical point of the supercritical state, it is very difficult to control the operation state of the supercritical carbon dioxide power generation system, and control research still needs to be carried out

Obviously, the existing supercritical CO 2 Cyclic power generation technical solutions are not suitable for rural areas in my country

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