An energy-saving solar hot water circulation supply system

Abstract

The invention discloses an energy-saving solar hot-water circulation supply system which comprises a solar heat collection system, a hot water pipeline and a buffer pipeline, wherein the solar heat collection system comprises a solar heat collector and a water storage tank; the hot water pipeline comprises a main pipeline and a plurality of branch pipelines; the first end of the main pipeline is communicated with the water storage tank; the branch pipelines are sleeved in the main pipeline to form a plurality of parallel branches wrapped in the main pipeline; the water outlet ends of the branch pipelines extends into single users respectively to supply hot water to the users; the buffer pipeline comprises a buffer pipe and a hot water circulation pipeline; the buffer pipe communicates the main pipeline and the water storage tank to form a temporary water storage mechanism connected with the water storage tank and the first end of the main pipeline; and the hot water circulation pipeline communicates the buffer pipe and the water storage tank to form a hot water circulation channel which communicates the buffer pipe and the water storage tank to keep water in the buffer pipe at a certain temperature.

Description

technical field [0001] The invention relates to the technical field of solar energy, and more specifically, the invention relates to an energy-saving solar hot water circulation supply system. 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 pipeline connected with the s...

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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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