Distributive cold and hot electricity continuous supply system based on condensed and frequency divided photovoltaic photothermal and double-combined Rankine cycle technology

Abstract

The invention discloses a distributive cold and hot electricity continuous supply system based on condensed and frequency divided photovoltaic photothermal and double-combined Rankine cycle technology. The system comprises a cylinder jacket water afterheat recovery subsystem, a double-combined Rankine cycle afterheat recovery and power generation subsystem, a condensed and frequency divided photovoltaic photothermal device, a heat pump circular heat supply / cold supply subsystem, an AC / DC inverter, a controller, a DC / AC inverter and an accumulator; natural gas is used for combustion in an internal combustion engine to generate electric power; high-temperature smoke afterheat and high-temperature cylinder jacket water afterheat generated by the internal combustion engine are recovered for power generation; and one part of sunlight is used for photovoltaic cell power generation through condensation and frequency division technologies. The system is high in energy utilization efficiency, reasonable in energy utilization mode and not limited by regions, weathers and the time change, can realize individual energy outputting according to user demands when realizing stable energy outputting, is compact in structure and easy to realize modular installation, realizes combination of new energy and traditional energy, and achieves the advantages of energy conservation, emission reduction and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of cogeneration of heat and power, and in particular relates to a distributed cooling, heating and power supply system based on concentrated light frequency division photovoltaic photothermal and double combined Rankine cycle technology. Background technique [0002] At present, the power generation efficiency of commercially produced photovoltaic cells on the market is about 20%. The reason why the power generation efficiency is low is that the photovoltaic cell only absorbs sunlight of a specific band to generate electricity, while the sunlight of other bands is absorbed by the photovoltaic cell to generate heat to increase the temperature of the battery. However, the power generation efficiency of the photovoltaic cell decreases with the increase of the battery temperature, which causes the problem that the power generation efficiency of the photovoltaic cell is not high. [0003] Concentrating and frequ...

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Problems solved by technology

However, for public buildings and domestic buildings in cities, the heat source temperature required by these devices is often less than 200°C to achieve the effect of heating or cooling, which will cause a large part of the loss of waste heat to work.

However, in the existing related patents that use the organic Rankine cycle for waste heat recovery to realize combined cooling, heating and power supply, the high-temperature flue gas is usually directly used as a heat source to drive the organic Rankine cycle, but the temperature of the heat source is too high. performance is adversely affected, thereby affecting system productivity

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