A thermoacoustic refrigerator driven by a multistage thermoacoustic engine

Thermoacoustic Engine and RefrigeratorStudent: Subhan UllahStudent ID: M135117

27/05/201311Table of contentsIntroduction Simple TA-engine(Prime mover) and TA-Refrigerator(Heat pump)ObjectivePrevious researchMain components Assembly/Configuration Advantages of TA-devices

27/05/20132Introduction(Thermo-acoustic engine) 27/05/20133Note: Thermo-acoustic Refrigerators principle is same and opposite to TA-Engine 27/05/20134Simple TA-engine(Prime mover) and TA-Refrigerator(Heat pump)27/05/20135

27/05/20136Previous research

Thermoacoustic cooking device, producing 17.6W output powerFour stage TA engine (the results are not confirmed yet)Thermoacoustic power generator (TAP), this is under construction at Netherland and it will make a power of 100kW from the paper drying process

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27/05/20138Model of a simple TA-EngineMain components 27/05/2013927/05/201310

Heat exchanger Ceramic re-generatorResonance tubeData recording devices(Other devices are Heaters, Thermocouples, Sensors Multimeters etc.)Stack/Re-generator 27/05/201311

Assembly/Configuration 27/05/201312

Advantages of TA-devicesMechanical it is very simple No moving parts, therefore no lubrication is needed and the maintenance cost is also reducedEnvironment friendly (no toxic gases)Low cost

27/05/201313Peclet numberThe Peclet number is a dimensionless number used in calculations involving convective heat transfer. It is the ratio of the thermal energy convected to the fluid to the thermal energy conducted within the fluid. The Peclet number is the product of the Reynolds number and the Prandtl number.It depends on the heat capacity, density, velocity, characteristic length and heat transfer coefficient.

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