A magnetic nanofluid concentrating photovoltaic heat and power cogeneration device

Abstract

The invention relates to a magnetic nano-fluid light condensation type photovoltaic combined heat and power generation device. The magnetic nano-fluid light condensation type photovoltaic combined heat and power generation device comprises a photovoltaic cell assembly module, a heat storage assembly, a photo-thermal assembly and a magnetic field adjusting assembly; the heat storage assembly comprises a heat reservoir and a heat exchange pipe; the heat reservoir is internally provided with phase change media; an inlet and an outlet of the heat exchange pipe are exposed out of the heat reservoir; the photo-thermal assembly comprises a circulating pump, a first header, a second header, multiple transparent heat gathering pipes, multiple uniform light bodies, Fresnel lenses and a framework; the uniform light bodies are polygon prisms; the area of the upper surface of the polygon prisms is greater than that of the bottom of the polygon prisms; the magnetic field adjusting assembly comprises S-shaped magnets and coils wound around the arms of the S-shaped magnets, one heat gathering pipe is arranged between the arms of every two adjacent magnets, and the S-shaped magnets and the heat gathering pipes are located on the same plane; the heat exchange pipe, the heat gathering pipes, the circulating pump, the first header and the second header are all internally provided with nano-fluid which can circulate and flow. The magnetic nano-fluid light condensation type photovoltaic combined heat and power generation device has the advantages of being simple in structure, capable of improving the solar energy utilization ratio, and the like.

Description

technical field [0001] The invention relates to a photovoltaic thermal power cogeneration device, in particular to a magnetic nanofluid concentrating photovoltaic thermal power cogeneration device. Background technique [0002] Since solar energy resources are abundant, and today's society seeks to save energy, the development and utilization of solar energy has great potential. At present, the utilization technologies of solar energy mainly include basic methods such as photothermal conversion and photovoltaic power generation. However, although photovoltaic power generation can obtain high-grade electric energy products, its main problem is that the photoelectric conversion efficiency is low, which makes the cost higher, and the spectral frequency range of the available sunlight is relatively narrow. The conversion efficiency of the battery is only about 10%-20%. The utilization of solar heat and light is mainly concentrated in the infrared part, and the conversion effic...

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Problems solved by technology

However, this kind of heating effect is often unsatisfactory. Generally, the temperature of hot water in summer can reach 40-60°C, while the water temperature in winter is only about 10-30°C, so the utilization rate of solar energy still cannot meet the demand.

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