Solar, heat-pump composite, stepped-heating type energy-storage hot-water making method and special device

Abstract

The invention relates to a method for producing hot water with solar energy-heat pump composite and hierarchical heating energy storage and a special device using this method, which is composed of a solar collector, a heat pump, an electric heating device, a water tank and a control unit, etc., and is characterized in That is, the hot water production process can be a combination of staged heating of the collector circulating heating water tank, staged heating confluence hot water tank and energy storage water tank through solar collectors, or heat pumps, or electric heating devices simultaneously or separately, and , the production and use of hot water adopts a time-sharing system, that is, the quantitative hot water produced by periodic graded heating can be pre-made and stored in the graded heating confluence hot water tank and energy storage tank for use as the next step. A cycle of time-sharing hot water supply enables the device to use as much solar energy as possible to achieve higher solar energy utilization and lower operating costs than existing technologies, ensuring that the hot water output of the device can reach above 45°C for 365 days 24 Hourly supply standard.

Description

technical field [0001] The invention relates to the field of solar energy utilization, [0002] In particular, it relates to a solar-heat pump composite, hierarchical heating energy storage hot water production method and a special device thereof. Background of the invention [0003] The amount of solar energy is huge, and the annual solar radiant energy reaching the earth's surface is about 130 trillion tons of standard coal, but its characteristics are dispersion, discontinuity and instability. Although the total amount of solar radiant energy reaching the earth's surface is large, the energy flux density is very low. Therefore, if you want to obtain a certain radiant power, you need a larger area to receive radiation. The so-called discontinuity and instability mean that solar radiation energy is limited by natural conditions such as day and night, seasons, geographical latitude, and altitude, as well as random factors such as sunny, cloudy, cloud, and rain. In order to...

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Problems solved by technology

The hot water device adopting this technical solution has also encountered some problems in practical application, such as: when the installation area of ​​the solar collector on the roof of the building is limited, it is difficult to ensure the maximum utilization of solar energy, and at the same time, the energy utilization of solar energy is insufficient Some of them must be supplemented by heat pumps. Therefore, sufficient low-cost energy such as off-peak power supply is required as a guarantee. It is difficult to obtain sufficient off-peak power supply at night when the current capacity of the incoming line of household users is fixed. ; At the same time, in order to achieve the effect of energy storage and cost reduction, the volume of the water tank will need to be made larger, which will increase the installation cost of the hot water device; for large centralized hot water devices, increasing the volume of the water tank will not only increase the installation cost, It also creates problems with roof installation and the bearing capacity of the installation surface, and reduces the installation area of ​​the solar collector, thus affecting the installation adaptability of its application

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