Energy storage method and device for solar disc type Stirling system

An energy storage method and energy storage device technology, applied in the field of solar power generation, can solve problems affecting the quality of grid-connected power, delayed operation time, unstable power output, etc., and achieve the goals of reducing solar fluctuations, prolonging power generation time, and stabilizing output power Effect

Active Publication Date: 2015-12-23
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem that the power output of the existing dish-type system is unstable, which affects the quality of grid electricity, and the system has to sto

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  • Energy storage method and device for solar disc type Stirling system
  • Energy storage method and device for solar disc type Stirling system
  • Energy storage method and device for solar disc type Stirling system

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Embodiment Construction

[0021] Such as figure 1 As shown, the energy storage material metal oxide 3 is on the inner wall of the collector cavity, and the sunlight focused by the dish mirror is refocused by the secondary concentrator 1 and then enters the collector cavity 2 . figure 2 It is a schematic diagram of a Stirling engine. The Stirling engine heat head 7 is used to absorb external heat, provide work to the working medium in the Stirling engine 8, and finally drive the generator 9 to generate electricity and output electric energy to the outside. Such as image 3 As shown, when the system is started, the solar energy is incident into the collector cavity 2, a part of the solar energy is directly absorbed by the heat head 7 of the Stirling engine, and is used for the external work of the Stirling engine 8, and the other part of the solar energy is absorbed by the metal oxide 3 Absorption increases the temperature of the metal oxide; when the solar energy is very sufficient (such as at noon), ...

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Abstract

The invention discloses an energy storage method and device for a solar disc type Stirling system. A Stirling heat collector is filled with metallic oxide. Focused solar energy enters the heat collector. Part of energy is transmitted to a heat head of a Stirling engine for acting. Part of energy is used for increasing the temperature of the metallic oxide. When solar energy is sufficient, and the temperature rises to the reaction temperature, the metallic oxide starts to decompose and suck affluent heat. When solar energy lacks, and the temperature in the heat collector starts to drop, the metallic oxide and oxygen in a cavity of the heat collector react, and heat is released and supplied to the Stirling engine; furthermore, the heat transfer rate of the Stirling heat head is increased by the adoption of the metallic oxide, and a heat pipe is additionally arranged between the metallic oxide and the Stirling heat head. By means of the energy storage method and device, the shortcomings of the electricity generation power fluctuation even halt caused by instable sunlight are mitigated, the output electricity quality is improved, impact on a power grid is reduced, and system efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to an energy storage method and device for a solar dish Stirling system. Background technique [0002] The total global solar radiation is about 1.7×10 17 W, of which my country accounts for about 1% (1.8×10 15 W, equivalent to 1.9 trillion tons of standard coal per year), is 680 times the current total annual energy consumption in my country. Electricity is the most consumed secondary energy in the world. Solar power generation technology is an effective means to alleviate the current energy crisis and has a broad application prospect. [0003] Solar power generation technologies are mainly divided into two categories: photovoltaic power generation and photothermal power generation. Photovoltaic power generation mainly uses the photoelectric effect of photovoltaic panels to generate electricity. There are currently three main disadvantages in this technology: (1)...

Claims

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Application Information

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IPC IPC(8): F03G6/06F02G1/043F24J2/34F24J2/32F24J2/48F24J2/06F24S10/95F24S23/00
CPCY02E10/44Y02E10/46
Inventor 肖刚杨天锋倪明江骆仲泱高翔岑可法方梦祥周劲松施正伦程乐鸣王勤辉王树荣余春江王涛郑成航
Owner ZHEJIANG UNIV
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