Dish condensation-based solar energy secondary condensation frequency division method and device

Abstract

The invention discloses a dish condensation-based solar energy secondary condensation frequency division method and a dish condensation-based solar energy secondary condensation frequency division device. A light hole is formed in the middle of a spinning paraboloidal dish reflecting mirror; a condensation photovoltaic battery board is arranged and a concentrator inlet is formed on two sides along an axis of the reflecting mirror below the light hole respectively; a frequency division lens is arranged a certain distance from the peak of the dish reflecting mirror above the light hole; a frequency division film is adhered to a curved surface, near the dish reflecting mirror, of the frequency division lens; the other curved surface, far away from the dish reflecting mirror, of the frequency division lens is a silver mirror reflection surface; a supporting rod is arranged between the dish reflecting mirror and the frequency division lens; a support is arranged below the dish reflecting mirror; a double-shaft tracking system is arranged on the support; and the whole system is placed on a rotation base plate. Through the method and the device, the condensation and frequency division of the solar energy can be realized, two condensation focal spots are transferred below a system, the energy consumption when the system tracks the sun can be effectively reduced, and balance and wind resistance of the system can be improved; and the condensation ratio of two beams of light can be adjusted respectively and the requirements of the optimal condensation intensities which are required by the condensation photovoltaic battery board and a concentrator respectively are met.

Description

technical field [0001] The present invention relates to the technical field of solar power generation, in particular to a solar secondary concentration and frequency division method based on dish-type concentration and a device thereof. Background technique [0002] The total global solar radiation is about 1.7×10 17 W, of which my country accounts for about 1% (1.8×10 15 W, equivalent to 1.9 trillion tons of standard coal per year), which is 680 times the current total annual energy consumption in my country. Electricity is the most consumed secondary energy in the world. Solar power generation technology is an effective means to alleviate the current energy crisis and has a broad application prospect. [0003] Solar power generation technologies are mainly divided into two categories: photovoltaic power generation and photothermal power generation. Photovoltaic power generation mainly uses the photoelectric effect of photovoltaic panels to generate electricity. There a...

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Problems solved by technology

There are currently three main disadvantages in this technology: (1) The power generation power varies with the intensity of sunlight, and it cannot generate power at night or on rainy days, which has a great impact on the power grid; The area of ​​photovoltaic panels is large, and the manufacturing process of photovoltaic panels is seriously polluted and the cost is high; (3) The response bands of photovoltaic panels to solar spectrum are mainly concentrated in the high-frequency short-wave region (400 < λ < 1100 nm), and the low-frequency long-wave Most of the energy in the area is converted into heat, resulting in an increase in the temperature of the photovoltaic panel, a decrease in photoelectric conversion efficiency, and a shortened service life.

[0006] Although the current trough, tower and dish concentrating systems all have their own concentrating and frequency division methods, their common disadvantage is that only the frequency division film is used to separate the high frequency short wave from the low frequency long wave. The two beams of light are located on both sides of the beam splitter, and the two focal spots cannot be transferred to the bottom of the system or the ground at the same time, and the concentration ratio of the two focal spots cannot be adjusted independently, which reduces the cost of concentrating photovoltaics and combined photothermal power generation. feasibility and flexibility

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