Solar hot water supplying system and control method thereof

Abstract

The invention provides a solar hot water supplying system which comprises a solar heat collector and a heat collecting circulating pump and further comprises a plurality of independent hot water supplying sub zones. Each sub zone comprises a heat collection water tank and a heat supplying water tank. Heat exchange is conducted between water in each heat collection water tank and water in one heat supplying water tank. Heat stored in the solar heat collector is transmitted to each heat collection water tank through the heat collecting circulating pump. The invention further provides a control method of the solar hot water supplying system. According to the solar hot water supplying system, the independent hot water supplying sub zones are arranged, mutual influence on water temperature and water pressure of different sub zones is reduced, and hot water with different using functions are set in different ways through the sub zones; the solar fraction is high, solar energy can be distributed in a more reasonable way by means of sub zone supplying, and heat loss is reduced; a double-circulation system provided with heat collection circulation and heat supplying circulation is established in each sub zone, so that the water supplying temperature in each sub zone is stable.

Description

technical field [0001] The invention relates to the field of building water supply, in particular to a solar hot water supply system and a control method thereof. Background technique [0002] With the rapid development of social economy, the demand for energy is increasing, the resources such as coal and oil are becoming increasingly scarce, as well as the over-exploitation of traditional resources and the emission of waste gas and waste residues, which have brought huge damage to the human living environment. All these crises have prompted human beings to re-examine the environment. For the sustainable development of the earth, human beings must find new alternative energy sources. As the cleanest renewable energy on earth, solar energy is one of the most precious green energy endowed by nature to human beings. How to scientifically utilize solar energy and other renewable energy has become a common issue facing the world. [0003] The solar water heating system can conve...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a solar hot water supply system and its control method to solve the existing problems of low solar energy guarantee rate and unstable outlet water temperature

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