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Multifunctional solar energy storage system and method

A solar heat collection and thermal energy technology, applied in the field of solar energy storage, can solve the problems of large heat storage process loss, low energy storage efficiency, heat collection device no longer has direct heat output, etc., to achieve the effect of reducing heat transfer links

Active Publication Date: 2014-03-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, some scholars have proposed the idea of ​​combining phase-change heat storage materials and heat collectors, such as Fatah HES's Thermal performance of a simple design solar air heater with built-in thermal energy storage system published on "Renewable Energy" In the first paper, it is proposed that the heat storage tube filled with phase change heat storage material replaces the heat storage device directly to store heat. This method reduces the heat transfer link in the solar heat storage process, but on the one hand, the heat collection device no longer has the function of directly outputting heat, and on the other hand On the one hand, after the phase change material stores heat, there is a temperature difference with the environment, and the heat storage process loses a lot, resulting in low energy storage efficiency

Method used

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  • Multifunctional solar energy storage system and method
  • Multifunctional solar energy storage system and method
  • Multifunctional solar energy storage system and method

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Experimental program
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Effect test

Embodiment 1

[0028] figure 1 Among them, the solar thermal energy storage system of this embodiment includes an energy storage absorber 1, a control valve 2, and a liquid storage device 3; figure 2 Among them, the energy storage absorber 1 is a trapezoidal chamber type, and is equipped with a heat collector heat exchanger 7, a gas channel 8, a glass cover 9, a heat absorbing surface 10, a reflecting surface 11 and an insulating material 12, and is equipped with a solid reactant 6, The liquid reservoir 3 is provided with an evaporative condensation heat exchanger 4 and filled with a liquid reactant 5 . The gas channel 8 in the energy storage absorber 1 is connected to the control valve 2 , and the control valve 2 is connected to the liquid reservoir 3 .

[0029] In the present embodiment, solid reactant 6 is MgCl 2 A mixture with graphite, the fluid reactant 5 is ammonia, and a trough-type light-gathering structure with a light-gathering ratio of 10 is adopted.

[0030] In this embodimen...

Embodiment 2

[0037] image 3 Among them, the solar thermal energy storage system of this embodiment includes an energy storage absorber 1, a control valve 2, and a liquid reservoir 3; the energy storage absorber 1 is a vacuum heat collecting tube type, and a heat collecting heat exchanger 7, a gas Passage 8, glass cover 9 and heat-absorbing surface 10, and solid reactant 6 is housed, and liquid reservoir 3 is provided with evaporative condensation heat exchanger 4, and liquid reactant 5 liquid is housed, and energy storage absorber 1 The gas channel 8 is connected with the control valve 2, and the control valve 2 is connected with the liquid reservoir 3.

[0038] In this embodiment, the solid reactant 6 is MgO, the fluid reactant 5 is water, and a CPC light concentrating structure with a light concentrating ratio of 4 is adopted.

[0039] In the stage of energy release, low-temperature secondary refrigerant is introduced into the evaporative-condensation heat exchanger 4, the fluid reacta...

Embodiment 3

[0043]The solar heat collection and energy storage system of this embodiment includes an energy storage absorber 1, a control valve 2, and a liquid reservoir 3; the energy storage absorber 1 is a vacuum heat collection tube type, and a heat collection heat exchanger 7 and a gas channel 8 are arranged inside. And glass cover 9, and solid reactant 6 is housed, is provided with evaporative condensation heat exchanger 4 in liquid reservoir 3, and liquid reactant 5 liquid is housed, gas channel 8 and control valve in energy storage absorber 1 2 connection, the control valve 2 is connected to the reservoir 3.

[0044] In the present embodiment, solid reactant 6 is Na 2 SO 4 The mixture with graphite, the fluid reactant 5 is water, and there is no light-gathering structure.

[0045] In this embodiment, in the heat collecting and charging stage, sunlight is directly converted into heat energy by the solid reactant 6 .

[0046] In the stage of energy release, the fluid reactant 5 ab...

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Abstract

The invention discloses a solar heat collecting and energy storage system which comprises an energy storage absorber, a control valve and a liquid storage device, wherein the energy storage absorber is internally provided with a heat collecting heat exchanger and a gas channel, and is filled with solid reactants; the liquid storage device is internally provided with an evaporation and condensation heat exchanger, and is filled with fluidized reactant liquids; the gas channel in the energy storage absorber is connected with the control valve; and the control valve is connected with the liquid storage device. According to the invention, the heat transfer link of solar energy storage process is reduced, the solar energy storage efficiency is improved, the loss of useful work is reduced, and meanwhile the solar heat collecting and energy storage system has the functions of heat collection, lossless energy storage and the like.

Description

technical field [0001] The invention relates to the technical field of solar energy storage, in particular to a solar thermal energy storage system and an energy storage method. Background technique [0002] In recent years, with the massive consumption of limited fossil fuels, energy and environmental issues have become one of the main issues restricting the sustainable development of my country's national economy. Solar energy resources have the advantages of large total amount, wide distribution, clean use, and no resource exhaustion. The conversion and utilization of solar energy has become an important part of the global renewable energy development strategy. However, the supply and demand of solar energy are not coordinated in terms of timing and intensity. Therefore, how to effectively store the surplus solar energy and release it again when needed has become one of the research hotspots in the field of solar energy utilization. [0003] For the traditional solar he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B29/00F24J1/00F24J2/34F24V30/00
CPCY02E10/40
Inventor 赖艳华董震吕明新
Owner SHANDONG UNIV