Heat transmission method and system for heat-pipe-type solar hot water system

Abstract

The invention discloses a heat transmission method and a system for a heat-pipe-type solar hot water system, relating to a solar hot water system, in particular to a split type solar hot water system. The heat transmission method comprises the process of converting solar energy into heat by a heat-pipe-type heat collection unit, and a heat transmission process of transmitting the heat into a water tank by a heat transmitting system and heating low-temperature water in the water tank, wherein the heat transmission process is that a continuous liquid-gas-liquid phase change is carried out in a completely-sealed circulation system through a heat-exchange working medium in a heat collection device so as to realize transmission of heat collected and converted by the heat collection unit to a water tank. According to the heat transmission method and the system, heat can be effectively transmitted between a condensation end of the heat-pipe-type solar heat collection unit and a split type water tank, thus heat loss is reduced, long-distance heat transmission of a livelihood hot water tank and a solar heat collection device is realized without the needing of external auxiliary energy, and the requirement of a modern high-rise building is met.

Description

technical field [0001] The invention relates to a solar water heating system, in particular to a split solar water heating system. Background technique [0002] Solar energy is an inexhaustible green energy, and solar water heating system is widely used all over the world as a direct and effective utilization of solar energy. With the development of solar water heating technology, as a solution for urban building solar energy systems, the market space of balcony solar water heaters is gradually on the rise, and more and more solar manufacturers have paid close attention to them, and launched a series of balcony solar water heaters Solar water heating products. As a pioneer product of solar energy and building integration, the balcony wall-mounted solar water heater has successfully combined with building integration, and has been unanimously recognized by consumers, thus realizing the application of solar water heating technology in high-rise buildings. [0003] Due to the...

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Problems solved by technology

But it also has obvious defects: poor reliability, difficult maintenance, if one tube is damaged, the whole system will not be able to operate; the inner tube is prone to scale and difficult to remove; cannot operate under pressure; large heat capacity, large heat loss; frost cracks Hidden danger

[0014] However, there are still insurmountable technical defects in this method. First, the channels of the flat-plate solar collector units are connected in series or in parallel, and the liquid working fluid needs to be heated by the solar energy collected by the heat absorber to form steam. It is generated in the multi-elbow rotary pipeline, so that the steam is not easy to generate and the pressure of the steam is not high, and the steam is not easy to enter the circulation and then promote the work of the entire circulation system

Secondly, since the working medium must be distributed in multiple heat absorbers to absorb solar energy, and enter the circulation system to heat the water in the water tank, this requires more liquid working medium and it is difficult to determine the perfusion amount of the liquid working medium

[0015] This method also has another insurmountable technical defect. Although the improved flat-plate solar heater has made the above-mentioned important improvements, the defect of large heat loss of the flat-plate solar water heater has not been effectively resolved by the above-mentioned improvements. overcome

A large number of practice has proved that the flat-plate solar heat collection unit cannot effectively heat the liquid heat-conducting working medium into steam in winter and when the sunshine is low. In order to maintain the normal hot water supply, a large amount of auxiliary electric energy is still required

However, since the heat collecting unit and the external pipeline of the flat-plate solar water heater are in the same conductive circulation channel, only the same heat-conducting working fluid can be used, and the conversion efficiency of the working medium in the heat collecting unit and the working medium in the water tank cannot be taken into account. There are two aspects of heat conversion efficiency, so there are still defects of low heat conversion efficiency

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