Solar hot water branch supply system capable of self-heating and preserving heat

Abstract

The invention discloses a solar hot water branch supply system capable of self-heating and preserving heat. The solar hot water branch supply system comprises a solar heat collecting system, a hot water pipeline, a buffer pipe and an auxiliary solar heating device. The solar heat collecting system comprises a solar collector and a water storage tank. The hot water pipeline comprises a main pipeline and a plurality of branch pipelines with hexagonal cross sections; after every two side faces of the branch pipelines are abutted against each other, the branch pipelines are wrapped inside the main pipeline, and thus the parallel branch pipelines with the honeycomb-shaped cross sections are formed. The side wall of each branch pipeline is of a double layered structure which is composed of an outer layer and an inner layer and provided with an interlayer. Heating wires are arranged in the interlayers of the double layered structures. The main pipeline is connected with the water storage tank through the buffer pipe, and a temporary water storage mechanism capable of supplying all the branch pipelines with water is formed. The heating wires are in electric connection with solar cell modules, and heat the inner sides of all the branch pipelines.

Description

technical field [0001] The invention relates to the technical field of solar energy, and more specifically, the invention relates to a solar hot water branch supply system capable of self-heating and heat preservation. Background technique [0002] my country is rich in solar energy resources, and the total annual solar radiation of more than two-thirds of the country's land area exceeds 3340-8360MJ / m 2 , the annual average sunshine hours are more than 2200 hours. At present, my country's energy-saving market is mainly concentrated in the fields of industry and construction, and the integrated technology of solar energy and buildings has become one of the commonly used building energy-saving technologies. [0003] A conventional solar water heating system includes a solar heat collection water supply and return system and a user terminal water supply and return system. The branch pipelines entering each user terminal are respectively connected to the large-diameter main pip...

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Problems solved by technology

[0003] A conventional solar water heating system includes a solar heat collection water supply and return system and a user terminal water supply and return system. The branch pipelines entering each user terminal are respectively connected to the large-diameter main pipeline connected with the solar water storage heater, and the main pipeline is carried out. Shared, and in order to ensure that hot water can quickly enter the user, the hot water circulates continuously in the solar heat collection water supply and return system. Due to the heat dissipation of the pipeline during the circulation process, it causes a huge heat loss, especially in winter in the north, the ambient temperature Very low, the heat dissipation of the pipeline is greater, reaching more than 80%, and when the insulation measures are not enough, the pipeline is prone to freezing, which is very easy to cause damage to the hot water system

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