Energy self-sufficient carbon dioxide combined cooling, heating and power generation system for low-grade heat sources
A low-grade heat source, combined cooling, heating and power technology, used in refrigerators, superheaters, refrigeration components, etc., can solve problems such as low utilization efficiency, and achieve the effect of increasing power generation, reducing power consumption, and improving power
Active Publication Date: 2021-06-01
北京绿卡科技有限公司
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[0006] Purpose of the invention: In view of the deficiencies and low utilization efficiency of the low-grade heat source utilization system in the above-mentioned prior art, the present invention provides an energy self-sufficient carbon dioxide cogeneration system for low-grade heat source
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[0024] In order to describe the technical solutions disclosed in the present invention in detail, further descriptions will be made below in conjunction with the accompanying drawings and specific embodiments.
[0025] The present invention provides an energy self-sufficient carbon dioxide cogeneration system for low-grade heat sources, including a transcritical carbon dioxide recuperation Rankine power cycle system and a transcritical carbon dioxide injection refrigeration cycle system. The system integrates the regenerative Rankine cycle and the jet refrigeration cycle, and uses carbon dioxide as the single working fluid. The extraction turbine of the transcritical CO2 heat recovery Rankine power cycle system converts low-grade heat energy into useful work. In addition, the water heater of the transcritical CO2 heat recovery Rankine power cycle system can also provide thermal energy (such as hot water) to the user. At the same time, the transcritical carbon dioxide injectio...
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The invention discloses an energy self-sufficient carbon dioxide cogeneration system for low-grade heat sources, which includes a transcritical carbon dioxide heat recovery Rankine power cycle system and a transcritical carbon dioxide injection refrigeration cycle system. Ken cycle and jet refrigeration cycle, using carbon dioxide as a single working fluid, convert low-grade heat energy into useful work through the extraction turbine of transcritical carbon dioxide recuperation Rankine cycle system, and use water heaters to provide heat energy to users. The transcritical carbon dioxide injection refrigeration cycle system uses the high-pressure exhaust waste heat of the extraction turbine to drive the ejector to output cold energy to the user, and through a reasonable arrangement of the system, the system can output more electric energy. The invention adopts a working fluid pump and a compressor with a low-pressure ratio, effectively reducing the compression work during system operation, and improving the net power generation of the system and the conversion efficiency of low-grade heat energy.
Description
technical field [0001] The invention belongs to energy conversion and utilization technology, and specifically relates to an energy self-sufficient carbon dioxide cogeneration system for cooling, heating and power used in low-grade heat sources. Background technique [0002] Facing the excessive use of traditional fossil fuels and the ensuing increasingly serious environmental pollution problems, the development and utilization of sustainable energy has become a hot research direction. Heat sources such as solar energy, geothermal energy, biomass energy, industrial low-temperature waste heat energy, and internal combustion engine exhaust heat energy are considered to be alternative energy sources that can meet the current continuously growing energy demand and reduce greenhouse gas emissions. Although the quantity of these low-grade thermal energy is large, the energy flow density is low, and the thermal energy conversion efficiency is not high during the utilization process...
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IPC IPC(8): F25B40/06F25B41/40F25B43/00F25B9/08F01K13/00F01K25/10F01K27/00
CPCF25B40/06F25B41/00F25B43/00F25B9/08F01K27/00F01K25/103F01K13/00
Inventor 张强骆泽威曹锐赵永杰
Owner 北京绿卡科技有限公司