Thermo-acoustic engine system with cold source and heat source used simultaneously

Abstract

A thermo-acoustic engine system with a cold source and a heat source used simultaneously comprises a thermo-acoustic engine, a first heat buffering pipe and a cold end heat exchanger, wherein the first heat buffering pipe and the cold end heat exchanger are sequentially connected between a first room temperature heat exchanger and a heat regenerator. A hot end heat exchanger is connected with the heat source to form a high temperature end. The cold end heat exchanger is connected with the cold source to form a low temperature end and a temperature gradient is formed on the heat regenerator. The heat regenerator can convert heat energy to acoustical power under the condition of the temperature gradient, and the acoustical power is first transmitted to a second heat buffering pipe and a second room temperature heat exchanger in the positive direction of the temperature gradient and then is divided at the position of a three-way pipe. One part of the acoustical power flows to a feedback pipe, is transmitted to a first room temperature heat exchanger and the first heat buffering pipe through a loop and is amplified through the heat regenerator. The other part of the acoustical power flows to a resonant tube and is stored in the resonant tube so as to enable the system to run stably for a long time in an equilibrium state. According to the thermo-acoustic engine system, the heat source and the cold source are utilized simultaneously, so that the temperature gradient of the heat regenerator is increased and the capacity for generating the acoustical powder of the engine is greatly improved; cold energy losses in the loop are reduced and the system has broad application prospects.

Description

technical field [0001] The invention relates to an engine system, in particular to a thermoacoustic engine system utilizing both a cold source and a heat source. Background technique [0002] In industry, there are often excess cold energy and excess heat energy. In terms of cold energy, such as industrial by-products of liquid nitrogen and liquefied natural gas, etc.; in terms of thermal energy, many low-grade thermal energies, such as solar energy, industrial waste heat, waste heat from flue gas, etc., cannot be fully and effectively utilized alone. However, in the prior art, it is still difficult to realize the efficient utilization of cold and heat energy on a single device at the same time. At present, thermoacoustic technology will be a good choice. [0003] Thermoacoustic technology refers to the technology that uses thermoacoustic effect to realize the mutual conversion between thermal energy and sound energy (ie mechanical energy). The system based on thermoacoust...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a thermoacoustic engine system that simultaneously utilizes a cold source and a heat source in view of the problem that the existing thermoacoustic engine cannot simultaneously utilize a cold source and a heat source; In the engine system, due to the simultaneous existence of cold and heat sources, the hot end uses low-grade heat sources, and the cold end uses excess cold energy, which can improve energy utilization

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