Combined heat and power utilization system based on selective absorption of solar radiation

Abstract

The invention belongs to the technical field of new energy development and utilization, and discloses a combined heat and power utilization system based on the selective absorption of solar radiation.The system comprises transparent glass plates, a solar cell panel, a solar cell supporting plate, a circulating pipe, and a thermal insulating separator plate. The circulating pipe sequentially passes through a heat exchanger, a circulating pump and an adjustment valve. A DAC working nanofluid passes through the circulating pipe, and is preheated below a photoelectric unit and then flows to a space between the two transparent glass plates of a photo-thermal unit. After heat exchange through the heat exchanger, the DAC working nanofluid flows back to form circulation. The DAC working nanofluidcan achieve two functions of light splitting and heat absorption and cooling. Meanwhile, the interior of the circulating pipe is additionally provided with a turbulent flow cylinder, thereby increasing the flowing speed of the DAC working nanofluid and improving the of heat convection. The system is simple in structure, is lower in cost, achieves the separation of the photoelectric and photo-thermal units through the comprehensive utilization of photoelectricity and photo-thermal energy, solves a problem of thermal combination, remarkably improves the heat utilization rate and the photovoltaic conversion efficiency, and is good in market application prospect.

Description

technical field [0001] The invention belongs to the technical field of new energy development and utilization, and relates to an electrothermal combined utilization system based on selective absorption of solar radiation. Background technique [0002] my country is rich in solar energy resources, and the annual radiation in more than 60% of the areas is greater than 5000MJ / m 2 , The annual sunshine duration is more than 2200 hours. With the rapid development of the economy, society's demand for traditional fossil energy has increased sharply, leading to increased consumption of fossil energy, resulting in energy shortages and a series of problems such as environmental pollution and climate warming. Therefore, as a clean energy source, the development and utilization of solar energy has great potential. At present, solar energy utilization technologies mainly include basic methods such as photothermal conversion, photovoltaic power generation, and photochemical conversion. ...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional electric heat utilization system mainly has the following problems: the traditional solar electric heat utilization mainly relies on the thermal system to cool the electric system to recover heat energy, which leads to the failure of the solar electric heat combined utilization system to work at high temperatures

[0007] However, this system using DAC for solar heat utilization is still relatively limited. With the development of the times, the society's demand for electric energy has further increased, and solar cells have many room for improvement, such as cooling problems in the process of power generation, efficiency lower questions etc.

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