Liquid metal-cooled focus type solar energy thermionic generating set

Abstract

The invention discloses a liquid metal-cooled focus type solar energy thermionic generating set, which comprises a thermionic generating module, a sunlight concentrator positioned above the emitter electrode of the thermionic generating module, and a liquid metal radiator. The liquid metal radiator comprises a heat conducting plain film contacted with the low temperature end of the generating module directly, and an electromagnetic pump arranged in a channel in the a substrate of an electromagnetic pump, wherein the electromagnetic pump consists of a pair of permanent magnetic sheets flatly arranged on the upper and lower surfaces of the substrate of the electromagnetic pump and a pair of electrode plates arranged on the two opposite walls of the channel in the substrate of the electromagnetic pump; the planes of the pair of the electrode plates are vertical to the planes of the pair of the permanent magnetic sheets; lead wires of the electrode plates are electrically connected with aphotoelectric battery; and a hollow runner in the heat conducting plain films, the channel in the substrate of the electromagnetic bump and a hollow runner in the radiation substrate of a finned radiator which are communicated are filled with flowing liquid metal. The device is a self-sustained adaptive high-efficiency solar energy generating device without any moving component, and has the advantages of simple structure, high reliability, convenient maintenance, low noise, energy saving and cleanness.

Description

technical field [0001] The invention relates to a solar power generation device, in particular to a method of using a sunlight concentrator to raise the high-temperature end of a thermionic generator to its optimum operating temperature, and driving the flow of liquid metal by means of a photoelectric-electromagnetic pump to cool the low-temperature thermionic generator To ensure that the two ends of the thermionic generator maintain an appropriate temperature level and temperature difference, a liquid metal-cooled concentrating solar thermionic power generation device that efficiently outputs electric energy. Background technique [0002] Due to the energy shortage, the research on renewable energy, especially obtaining electricity directly from solar energy, has received unprecedented attention. However, there are still many technical obstacles in the current solar power generation that restrict its large-scale practical application. One of the most critical links is the d...

AI Technical Summary

Problems solved by technology

The basic structure of this power generation method is the use of a thermionic thin-film converter, which is a device that converts thermal energy into electrical energy. Its principle is to raise the radio part (emitter) to a very high temperature, boil The electrons are ejected from the surface, pass through a very narrow electrode gap, and reach a collector with a lower temperature; the thermionic converter is actually a heat engine, so its maximum efficiency is limited by the Carnot cycle; typical The working parameters of the thermionic electricity are as follows: the working temperature of the radio part is 1600-2000K (this one is also called the high temperature end); the current collection part working temperature is 800-1100K (this one is also called the low temperature end); the electrode gap 20%; energy density 1-10W / cm 2 ;Typical thermionic materials are as follows: W, Re, Mo, etc. can be used for the radio part; Nb, Mo, etc. can be used for the collector part; Al can be used for the insulating material 2 o 3 , Al 2 o 3 / Nb cermets, etc. Cs can be inflated between the electrodes, and the vacuum degree is about 1 Torr; in the past, the heat source used in thermionic power generation mainly came from the combustion process or nuclear fuel, and the attempt to use solar energy for heating was rarely mentioned. Because of the low heating density of solar energy, it is rare to use focused heating, and it is difficult to achieve the ideal power generation temperature level and temperature difference without reasonable heat dissipation at both ends of the thermionic film. In this regard, traditional air Cooling or liquid cooling is not easy to achieve this goal; for this reason, no substantial progress has been made so far in solar thermionic power generation

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