Thermo-acoustic power generation system utilizing cascade heat energy and cascade cold energy

Abstract

The embodiment of the invention provides a thermo-acoustic power generation system utilizing cascade heat energy and cascade cold energy. A thermo-acoustic power generation loop comprises at least two sets of thermo-acoustic power generation units and connecting pipes connected with the thermo-acoustic power generation units. Each group of thermo-acoustic power generation unit comprises a linear motor and a thermo-acoustic engine, the linear motor and the thermo-acoustic engine are connected through a connecting pipe, and the thermo-acoustic engine is connected with the adjacent thermo-acoustic power generation unit in the thermo-acoustic power generation loop through a connecting pipe; the thermo-acoustic engine comprises a first room temperature heat exchanger, a second room temperature heat exchanger and at least two thermo-acoustic assemblies arranged between the first room temperature heat exchanger and the second room temperature heat exchanger in parallel. The low-temperature cold energy supply system is sequentially connected with the thermoacoustic assemblies arranged in parallel in series, and a low-temperature end with the temperature distributed in a stepped mode is formed at one end of each thermoacoustic assembly. The low-grade heat energy supply system is sequentially connected with the thermoacoustic assemblies arranged in parallel in series, and a high-temperature end with the temperature distributed in a stepped mode is formed at the other end of each thermoacoustic assembly. Cold energy recovery and waste heat utilization are achieved through the thermo-acoustic technology.

Description

technical field [0001] Embodiments of the present invention relate to the field of energy technology, and in particular to a thermoacoustic power generation system utilizing cascade heat energy and cascade cold energy. Background technique [0002] The potential crisis of energy and the deterioration of ecological environment make countries all over the world actively develop and utilize low-grade heat energy. Natural gas is an important part of the world's energy consumption today. The volume of LNG after low-temperature liquefaction of natural gas is only 1 / 625 of the original volume, which is convenient for storage and transportation of natural gas. During storage and transportation, LNG is maintained in a low temperature environment of 110K, 0.1MPa. If natural gas is used, it is generally necessary to gasify LNG first. During the gasification process, LNG releases a large amount of cold energy. If the released cold energy is directly discharged into the environment, i...

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Problems solved by technology

For this reason, the embodiment of the present invention proposes a thermoacoustic power generation system using cascade heat energy and cascade cold energy to solve the problems of how to recover cold energy and utilize low-grade waste heat in the prior art. The heat exchanger establishes the sound field, and uses the working fluid gas to interact with the solid packing in the regenerator to convert the external heat energy into sound energy

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