Solar based combined drying system

Abstract

The invention provides a combined drying system based on solar energy. The combined drying system comprises a first circuit, a second circuit and a third circuit. A solar thermal collector, a heat exchanger and a heat pump unit are connected sequentially to form the first circuit, and the first circuit is used for absorbing thermal energy through the solar thermal collector and for providing thermal energy of first temperature and second temperature for the heat exchanger and the heat pump unit correspondingly. The heat exchanger is connected with a high temperature storage tank, a drying subsystem and a low temperature storage tank sequentially correspondingly to form the second circuit, and the second circuit is used for operation that after subjected to heat exchange by the heat exchanger, heat conduction circulation water from the low temperature storage tank is stored in the high temperature storage tank. The heat pump unit is connected with the high temperature storage tank, the drying subsystem and the low temperature storage tank sequentially correspondingly to form the third circuit, and the third circuit is used for operation that after subjected to heat exchange by the heat pump unit, heat conduction circulation water from the low temperature storage tank is stored in the high temperature storage tank. Through the combined drying system, energy utilization efficiency can be improved, and stable operation of the drying process under different solar irradiation conditions is achieved.

Description

technical field [0001] The invention relates to the technical field of drying / drying, in particular to a combined drying system based on solar energy. Background technique [0002] Drying / drying technology is widely used in industrial and agricultural production and is an energy-intensive process. Traditional natural drying has low efficiency, long cycle, and varying degrees of drying. The use of burning fossil energy to directly provide drying heat is not only a waste of high-quality energy, but also causes environmental pollution and other problems. Therefore, the development of efficient and clean drying technology is an important development direction in the drying / drying field. [0003] The total amount of solar energy resources is abundant. Most of the global energy comes directly or indirectly from solar energy. It is an inexhaustible clean energy source. Using solar energy to provide drying heat is an ideal drying method, but solar energy itself The weather change...

AI Technical Summary

Problems solved by technology

[0004] The invention provides a combined drying system based on solar energy to solve the problems of discontinuous operation of the existing solar drying system and low operating efficiency of the heat pump high temperature drying system

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