Distributed solar heat storage device

Abstract

The invention relates to a distributed solar heat storage device. A light-gathering device is composed of a large reflector 2 and a small reflector 3, has two degrees of freedom of pitch rotation andhorizontal rotation and can track a sun azimuth; the light-gathering device gathers sunlight onto a heat storage container 12 so as to heat heat-conducting oil 6 inside the heat storage container 12;the heat storage container 12 is wrapped with a heat-preservation layer 4, and thus the heat storage function is achieved; heat of the heat-conducting oil 6 is transmitted to tap water through a heatexchanger 10, and thus hot water can be produced; and the heat-conducting oil 6 of the multiple distributed solar heat storage devices is gathered to generate high-temperature steam 48, and thus a turbo generator set 44 can be driven to generate power. The whole device does not have complex technique and scarce materials, and is low in cost and suitable for quantity production; and the distributedsolar heat storage device can access to the consumer goods market and the industrial and commercial markets simultaneously only through an industry chain, the yield is increased more rapidly, the industry chain matures more rapidly, and the cost is reduced more rapidly.

Description

technical field [0001] The invention relates to the field of solar energy utilization, in particular to a distributed solar heat storage device. Background technique [0002] At present, there are two main methods of utilizing solar energy: producing hot water and generating electricity. The technical route of the former is mainly household solar water heaters and commercial hot water systems, while the technical route of the latter is mainly photovoltaic power plants and photothermal power plants. The most widely used technology routes are household solar water heaters, commercial hot water systems and photovoltaic power plants, while solar thermal power plants are still in the demonstration project stage as a whole, and it is still far away from large-scale commercialization. The main reason why it is difficult to commercialize solar-thermal power stations on a large scale is that trough-type solar-thermal power stations and tower-type solar-thermal power stations need to...

AI Technical Summary

Problems solved by technology

The main reason why it is difficult to commercialize solar-thermal power stations on a large scale is that trough-type solar-thermal power stations and tower-type solar-thermal power stations need to be built on a wide flat ground. The larger the scale, the lower the cost. For large-scale power station projects that rely on government investment, it is difficult to increase the output, and the low output in turn restricts the maturity of the industrial chain and the reduction of costs; although the dish-type photothermal power station is suitable for realizing distributed power stations, the manufacturing cost of the Stirling engine It is too high, it is difficult to reduce it to a level comparable to photovoltaics

[0003] The main disadvantages of domestic solar water heaters and commercial hot water systems are: (1) cannot actively track the sun, and the heat collection efficiency is not high enough; (2) long-term storage of water in water tanks and vacuum tubes will cause scaling; (3) when used in severe cold areas, There is a hidden danger of freezing and bursting; (4) It cannot generate electricity or steam, and the scope of application is not wide; (4) It is not good-looking

[0004] The main disadvantages of photovoltaic power plants are: (1) The photoelectric conversion efficiency is not high enough, and it will decay year by year; (2) When the technology of actively tracking the sun is not used, the heat collection efficiency is not high enough, but the investment cost will increase after adoption; (3) Cogeneration of heat and power cannot be realized, and the energy utilization rate is low; (4) It is easily affected by the weather, and the power generation is not stable; (5) The generated electricity must be transmitted to the grid immediately, and the grid needs to be dispatched, so the absorption capacity of the grid The requirements are very high, which is also one of the main reasons for "abandoning light and limiting electricity"

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