Multi-stage traveling wave thermoacoustic engine system for cascaded utilization of waste heat of high temperature flue gas

Abstract

The invention discloses a multi-stage traveling wave thermoacoustic engine system for cascaded utilization of waste heat of high temperature flue gas. The multi-stage traveling wave thermoacoustic engine system adopts a loop structure formed in such a way that N stages of thermoacoustic engine units are connected end to end through resonant tubes, wherein N is equal to a positive integer ranging from 3 to 10; the thermoacoustic engine units comprises direct current suppressors, primary coolers, regenerators, heaters, high-temperature end layer fluidifying elements, thermal buffer tubes, room-temperature end layer fluidifying elements, secondary coolers and the resonant tubes, which are connected in sequence; when the system works, the waste heat of high temperature flue gas passes through heaters of the thermoacoustic engine units in sequence, and is subjected to heat exchange with the heaters to enable the heater to generate high temperature, temperature gradient is formed at the regenerator of the engine, heat energy is converted into acoustic work under the temperature gradient, the acoustic work spreads in the positive direction of the temperature gradient, and is amplified for many times, and the system circularly works; no mechanical movement parts exist, the structure is simple, the waste heat of flue gas can be efficiently used in a cascade manner to generate acoustic work, and the energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention belongs to the field of engines, and in particular relates to a multi-stage traveling wave thermoacoustic engine system for cascade utilization of high-temperature flue gas waste heat. Background technique [0002] Energy is an important basis for economic development and social progress, and energy conservation and emission reduction is a key issue for my country to better carry out modernization and develop a market economy. Waste heat utilization, as an important part of energy conservation and emission reduction, has great potential for development. Waste heat belongs to secondary energy. It is rich in resources in my country and widely exists in power plant boilers and industrial equipment. The total amount of high-temperature flue gas waste heat accounts for about 50% of the total waste heat resources. Boiler flue gas heat loss and automobile exhaust waste heat are the largest items of heat loss, not only wasting a lot of potential...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem of high-efficiency conversion and simple output of the variable-temperature heat source using flue gas waste heat in the traditional system, this invention proposes a new type of process, which can utilize heat sources of different temperature grades efficiently and in low steps, and simultaneously output adopts a single output , reducing system complexity

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