Loop thermal drive thermoacoustic refrigeration system
A technology of thermoacoustic refrigeration and thermoacoustic refrigerator, which is applied in gas cycle refrigerators, refrigerators, refrigeration and liquefaction, etc., can solve the problems of limited adjustment capacity of resonance tubes, reduced overall machine efficiency, and increased sound power loss, etc., to achieve Compact structure, no moving parts, high power density effect
Active Publication Date: 2018-06-19
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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However, since the sound work produced by the thermoacoustic engine is proportional to the ratio of the heating temperature to the room temperature, and the sound work consumed by the thermoacoustic refrigerator is proportional to the ratio of the room temperature to the cooling temperature, then the thermoacoustic engine and the thermoacoustic refrigerator directly The problem with the connected structure is that the heating temperature and cooling temperature need to match, otherwise the efficiency of the whole machine will be greatly reduced
However, the introduction of the resonant tube increases the loss of sound power
In addition, the adjustment ability of the resonant tube is limited, especially for air-conditioning refrigeration in the room temperature zone where the cooling temperature is above 0°C. The sound work generated by the thermoacoustic engine is much greater than the sound work consumed by the thermoacoustic refrigerator. To obtain the matching of the two will limit the efficiency of the whole machine
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[0035]The present invention provides a loop heat-driven thermoacoustic refrigeration system, in which a two-stage thermoacoustic refrigerator is driven by generating sound work through a one-stage thermoacoustic engine, which can be efficiently applied to refrigeration in room temperature regions. In addition, the loop heat-driven thermoacoustic refrigeration system has the advantages of compact structure, no moving parts, high power density, high energy utilization efficiency, high reliability, and the use of environmentally friendly gas working fluid. In addition, the refrigeration system can use low-grade heat sources such as waste heat or solar energy as the heating heat source, and can efficiently realize the cooling demand of two different refrigeration temperatures at the same time. It has broad development and application prospects in the field of waste heat air conditioning and refrigeration.
[0036] In order to achieve the above purpose, as Figure 5 As shown, the p...
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The invention relates to a loop thermal drive thermoacoustic refrigeration system. The loop thermal drive thermoacoustic refrigeration system comprises a loop structure formed by connecting N thermoacoustic units (15) of the same structure end to end through resonator tubes, and N is a positive integer in the range of 1 to 20; each thermoacoustic unit comprises a first-stage thermoacoustic engine,a first-stage thermoacoustic refrigerator and a second-stage refrigerator; the first-stage thermoacoustic engine, the first-stage thermoacoustic refrigerator and the second-stage refrigerator are sequentially connected; through the mode that the first-stage thermoacoustic engine generates acoustic power for driving the two stages of thermoacoustic refrigerators, and the system can be efficientlyapplied to room temperature zone refrigeration; and the loop thermal drive thermoacoustic refrigeration system has the advantages that the system is compact in structure, free of movement part, high in power density, energy utilization rate and reliability and uses environment-friendly gas working media.
Description
technical field [0001] The invention belongs to the technical field of energy power and low-temperature refrigeration, and in particular relates to a loop heat-driven thermoacoustic refrigeration system. Background technique [0002] Under certain sound field conditions, through the heat exchange between the compressible gas oscillating back and forth in the narrow flow channel and the surrounding solid medium, the work amplification effect or heat pumping effect in the main transmission direction of the sound wave can be realized, that is, the thermoacoustic effect. A thermoacoustic engine is a device that uses the thermoacoustic effect to convert heat input from an external high-temperature heat source into sound energy. The thermoacoustic refrigerator uses the thermoacoustic effect to transport heat from low temperature to high temperature through the pressure fluctuation generated by the outside world. The heat-driven thermoacoustic refrigerator uses the pressure fluctu...
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Login to View More IPC IPC(8): F25B23/00F25B27/00
CPCF25B23/00F25B27/00F25B27/002F25B2309/1403
Inventor罗二仓张丽敏胡剑英余国瑶王慧志
OwnerTECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI