Efficient solar heating method and system based on grading-type heat storage and releasing

Abstract

The invention discloses an efficient solar heating method and system based on grading-type heat storage and releasing. The efficient solar heating system comprises a solar heat collecting field, a heat storage and releasing system and a user heating system. The solar heat collecting field comprises a solar heat collector, a low-temperature heat transferring medium master tube and a high-temperature heat transferring medium master tube; the heat storage and releasing system and the user heating system are connected between the low-temperature heat transferring medium master tube and the high-temperature heat transferring medium master tube in parallel, and a heat storage tank body of the heat storage and releasing system is internally provided with a top filling area, one or more middle filling areas and a bottom filling area which sequentially communicate; and the user heating system is provided with a heating heat exchanger and an auxiliary heating boiler. According to the efficient solar heating method, a heat transferring and storage separation double-loop system is adopted, a heat transferring medium circularly absorbs solar energy in the solar heat collecting field, conducts heat exchanging with an energy storage medium in the heat storage and releasing system to store or obtain heat energy and transfers the heat energy to cold water in the user heating system to heat, and the efficient solar heating method and system based on grading-type heat storage and releasing have the advantages of being good in heat storage and releasing efficiency and heating effect.

Description

technical field [0001] The invention relates to solar heating technology, in particular to a high-efficiency solar heating method and system based on hierarchical heat storage and heat release. Background technique [0002] Solar heating is a technology that uses solar collectors to collect solar radiation and convert it into thermal energy for heating. The solar heating system is to use solar collectors to collect solar radiation and convert it into heat energy. Liquid is used as heat transfer medium, water is used as heat storage medium, and heat is sent to the room through heat dissipation components for heating. [0003] Existing solar heating systems generally consist of solar collectors, hot water storage tanks, connecting pipelines, auxiliary heat sources, cooling components and control systems. The solar heating system uses water as the heat transfer medium and energy storage medium, and has the advantages of safety, reliability, energy saving and environmental prot...

AI Technical Summary

Problems solved by technology

For the non-partitioned heat storage tank, the heat transfer medium enters from one end and flows out from the other end. During heat storage, the temperature gradually decreases along the flow direction. The heat storage material heated first heats up quickly, and the heat storage material heated later heats up slowly; heat release When the temperature gradually increases along the flow direction, the heat storage material that releases heat first cools down quickly, and the heat storage material that releases heat later cools down slowly, which leads to problems such as a low total heat storage and heat release in the heat storage system, and a decrease in heat transfer efficiency.

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