Heat collection type solar circulation drying system based on Fresnel lens

Abstract

The invention relates to a heat collection type solar circulation drying system based on a Fresnel lens. The heat collection type solar circulation drying system based on the Fresnel lens comprises a solar energy collection device, a heat exchange device, a drying box, an air flow control device, a double-shaft automatic tracking device and a central control module, wherein the solar energy collection device collects the solar energy and transfers the collected solar energy to the heat exchange device; the heat exchange device converts the solar energy to the heat energy; the heat energy is transferred to the drying box by the air flow control device and is used for carrying out drying operation on a material in the drying box; the double-shaft automatic tracking device tracks the solar direction in real time and also regulates the sunlight collection direction of the solar energy collection device according to the solar direction, so that invariant position of a focusing focus is ensured, and the solar energy collection efficiency is improved; and heating waste gas in the drying box reenters the heat exchange device through the air flow control device to carry out circulation heat exchange. The heat collection type solar circulation drying system based on the Fresnel lens can improve the heat exchange efficiency to the maximum and is used for drying the material.

Description

technical field [0001] The invention relates to the field of solar energy applications, in particular to a Fresnel lens-based heat-concentrating solar cycle drying system. Background technique [0002] With the development of the economy and the shortage of energy, solar energy has been paid more and more attention. The application prospect of solar drying directly serving industrial and agricultural production. In the 1990s, solar drying mainly developed in the direction of technology development and practical application. According to incomplete statistics, so far, the total lighting area of ​​solar drying devices in the country is about 15,000m2, and the achievements are huge. of. However, compared with the solar water heaters with a holding capacity of nearly ten million square meters, the development of solar drying is lagging behind. There are various reasons for this: firstly, solar drying has not been well realized in productization and commercialization, and has n...

AI Technical Summary

Problems solved by technology

However, compared with the solar water heaters with nearly ten million square meters of reserves, the development of solar drying seems to be lagging behind.

There are various reasons for this: firstly, solar drying has not been well realized in productization and commercialization, and has not formed a large-scale industry. Of course, this is also related to the characteristics of diversification of solar drying applications and not easy to unify; secondly , solar drying has a strong technicality, especially closely related to the drying process

Many scientific research units engaged in solar drying have stopped the development and promotion of solar drying due to funding problems and system changes, and most of the applications are in rural areas with weak technical strength. It is not easy to master new technologies, resulting in a gap between technology and users. Third, unlike solar water heaters that can be used by thousands of households all year round, solar drying applications in rural areas have strong seasonality, and the utilization rate is not high. In industrial applications, the energy required is generally It is very large, and simply using solar energy cannot solve the problem

These are the objective reasons that affect the popularization and application of solar drying

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