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A Novel Thermionic-Thermoacoustic Combined Thermoelectric Conversion System

A technology of thermoelectric conversion and thermoion, applied in electrical components, generators/motors, machines/engines, etc., can solve the problems of only 17% thermoelectric conversion efficiency, waste of heat energy, low energy utilization rate, etc., and achieve good one-way transmission Effects of thermal properties, realization of heat loss and heat transfer, and improvement of thermoelectric conversion efficiency

Active Publication Date: 2021-03-30
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The temperature of the emitter and receiver of the existing thermionic power generation is usually 1500-2200K and 600-1300K respectively, and the thermoelectric conversion efficiency is only 10-15%, so there is a lot of waste of heat energy and low energy utilization rate
The thermoacoustic power generation method requires the temperature of the hot end to be about 1000K, which is close to the temperature of the receiving electrode of the thermionic conversion module, and its actual thermoelectric conversion efficiency is only about 17%.

Method used

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  • A Novel Thermionic-Thermoacoustic Combined Thermoelectric Conversion System

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Such as Figure 1-5 As shown, a new type of hot ion-thermo-sound combination thermoelectric conversion system including a hot ion power generation module 1 and a thermoelectric power generation module 2; wherein one end of the hot ion power generation module 1 receives a high temperature heat source 3 and converted into a current. The other end is released by the carbon nanotube heat transfer layer 15; the thermal sound generating module 2 receives the remaining heat 4 released by the carbon nanotube heat exchange layer 15 and converted to electrical energy.

[0033] See figure 1 with figure 2 The hot ion power generation module 1 includes one or more hot ion converters 11, each of which is divided into an emitter 12, an electrode gap 13, a receiving pole 14 and a carbon nanotube in the transfer direction of the high temperature heat source 3, respectively. The heat exchange layer 15. Among them, the high temperature heat source 3 is a heat source having a temperature of 1...

Embodiment 2

[0043] This example is used to illustrate the final thermoelectric conversion efficiency of the new type 1 described above in Example 1.

[0044] In the solar power system, the light energy is converted to thermal energy, and the heat ion converter 11 emits 12 to 2000K. The related operation parameters of the high-efficiency combined thermoelectric conversion system are: emitter 12 temperature TE = 2000K, the receiving pole 14 temperature Tc = 1000K; the surface work function of the emitter 12 is φe = 2.8eV, the receiving pole 14 surface work function φC = 2.2ev; The actual heat transfer efficiency of the carbon nanotube heat exchange layer 15 is about 85%.

[0045] According to the Richardson-Dusman launch equation, the output current calculation formula of the hot ion power generation module 1 is as follows:

[0046] J = AT 2 Exp (-φ / kt) (1)

[0047] Among them, A is Richardson constant (1.202 × 10 6 A / M 2 K 2 ), K is Bolzman constant (1.38 × 10 -23 J / K -1 ), T is the elec...

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Abstract

The invention provides a novel thermionic-thermoacoustic combined thermoelectric conversion system. The novel thermionic-thermoacoustic combined thermoelectric conversion system comprises a thermionicpower generation module and a thermoacoustic power generation module, wherein one end of the thermionic power generation module receives a high-temperature heat source, and the other end of the thermionic power generation module releases waste heat; the thermoacoustic power generation module receives waste heat released by the thermionic power generation module and converts the waste heat into electric energy; the thermionic power generation module comprises a thermionic converter, and the thermionic converter is divided into an emitting electrode, an electrode gap, a receiving electrode anda carbon nanotube heat exchange layer in the transmission direction of the high-temperature heat source; the thermoacoustic power generation module comprises a resonance tube, a generator, a heat regenerator, a heater and a cooler, and the heat regenerator, the heater and the cooler are arranged in the resonance tube; and a carbon nano tube heat exchange layer is arranged at the position, corresponding to the heater, of the outer peripheral wall of the resonance tube and transfers the waste heat. The waste heat discharged by the thermionic power generation module is used as a heat source of the thermoacoustic power generation module, the low-grade heat energy of the thermionic power generation module is efficiently recycled, and the thermoelectric conversion efficiency of the system is greatly improved.

Description

Technical field [0001] The present invention relates to the field of thermoelectric conversion techniques, and more particularly to a new type of hot ion-thermo-combined thermoelectric conversion system. Background technique [0002] The heat ion power is a thermoelectric conversion technology that generates electrical energy using a metal or semiconductor material surface thermoelectric emission, has a non-rotating mechanical component, high quality than high thermoelectric conversion efficiency, and has a spatial power technology such as Topaz in Russia. Application of marine dynamics and other fields. [0003] The thermoelectric power generation is a thermoelectric conversion technology based on the thermal phonter, mainly composed of a thermal sound and an acoustic conversion unit, no high temperature moving part, and the sound energy generated by the thermoelectric heat generator is converted into electrical energy through the sound electrical conversion unit. Apply in the f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03G7/00H02N11/00
CPCF03G7/002H02N11/002
Inventor 胡慧庆徐刚姜志忠李春京黄群英吴宜灿
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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