Thermoacoustic engines
Standing-wave thermoacoustic engines
... a thermoacoustic effect. We explore the basic principles of thermoacoustic engines and primarily we focus on a quarter-wavelength closed-open thermoacoustic engine as a prime mover, where ...
10
Selection and experimental evaluation of low-cost porous materials for regenerator applications in thermoacoustic engines
... Performance of the engine equipped with six regenerators described in section II was tested in two ways. Firstly, starting from the situation when the rig was at room conditions, the engine onset temperature was ...
26
A Review on Thermoacoustic Refrigeration System
... methods. Thermoacoustic engines and refrigerators were already being considered for a few years ago for specialized applications, where their simplicity, lack of lubrication and sliding seals, and their use ...
7
Experimental Investigation of Thermoacoustic Driven Thermoacoustic Refrigerator
... a thermoacoustic engine is resonator in which prolongation of resonator leads to a decrease of working frequency and increase in the stack’s hot end temperature to generate ...standing-wave thermoacoustic ...
9
Characteristics of Acoustic Drivers for Efficient Coupling to Thermoacoustic Machines
... the thermoacoustic effect, whereby the high temperature gradient imposed on the solid material placed in gaseous medium generates sound ...reverse thermoacoustic process is possible, whereby the acoustic ...
6
The Influence of Heat Input Ratio on Electrical Power Output of a Dual-Core Travelling-Wave Thermoacoustic Engine
... 6]. Thermoacoustic stoves have been shown to be a cheap option compared to others in situations where hydropower is not available, but since the technology is relatively new, and these low temperature systems are ...
25
The Effect Of Flow Frequency On Heat Exchanger Used In Thermoacoustics
... the thermoacoustic engines and thermoacoustic refrigerators are shown in Figure ...The thermoacoustic engine will convert thermal energy caused by a temperature gradient produced from the both ...
24
Development and assessment of two-stage thermoacoustic electricity generator
... heat-grades. Thermoacoustic traveling-wave engines (TATWE) have drawn attention because of their advantages which include no mechanical moving parts, longevity and the use of environmentally friendly gases ...
18
Study on A Standing Wave Thermoacoustic Refrigerator Made of Readily Available Materials
... heat-driven thermoacoustic refrigerator known as the beer cooler was built, which uses a heat-driven prime mover instead of a loudspeaker to sound necessary to drive the ...a Thermoacoustic Driven Thermo ...
30
Identification of temperature field in thermoacoustic generator
... The interaction of heat and sound has been a subject of interest to acousticians since 1816, when Laplace [1] corrected Newton’s first theoretical calculation of the speed of sound in air, [2]. Newton assumed that the ...
5
Experimental Analysis of Thermoacoustic Refrigeration with Combination of Different Gases and Stack Material
... motion. Thermoacoustic thus describes energy conversion processes initiated by the interaction of the temperature oscillation accompanying by the pressure oscillation in a sound wave with solid ...term ...
6
Phase separation studies in polyvinyl chloride polyvinyl acetate blend by ultrasonic technique
... The ultrasonic velocity and their related thermoacoustical parameters were successfully employed to understand the miscibility and molecular interactions in polymer blend. Ultrasonic velocity, density and viscosity in ...
6
Experimental Investigations on the Performance of Eco- Friendly Thermoacoustic Refrigerator
... the thermoacoustic theory and the early history of thermoacoustics are documented by Swift ...a thermoacoustic refrigerator subjected to variable ...the thermoacoustic heat flow were ...
5
Comparison of Radar and Thermoacoustic Technique in Microwave Breast Imaging
... Figure 6 shows the MITA image generated with the DAS algorithm. The image does not directly resemble the space- dependent parameter shown in Figure 5 due to the introduced acoustic heterogeneity. However, it suggests ...
14
Two-stage Looped-tube Thermoacoustic Cooler –
... wave thermoacoustic refrigerator such as their locations, cross-sectional area and lengths have been discussed and illustrated in publications by other thermoacoustic researchers [9, 10 and ...wave ...
6
Thermoacoustic Characterization of Gasoline and Its Binary Mixtures with Ethanol
... The temperature dependent parameters such as ultrasonic velocity, density, viscosity and surface tension and have been measured at five temperatures from 298.15 to 318.15K hav[r] ...
6
Multiple scattering in dispersions, for long wavelength thermoacoustic solutions
... solving thermoacoustic scattering in the long wave limit can be applied to the scattering by two closely separated spherical ...the thermoacoustic attenuation in a concentrated ...
9
CRYOGENIC ENGINES
... mixture of fuels offers the highest energy efficiency for the rocket engines that produces very high amount of thrust. Here, the Oxygen remains liquid only at the temperature below (-183⁰C) and Hydrogen at below ...
5
A Review and Economic Analysis of Different Emission Reduction Techniques for Marine Diesel Engines
... propulsion engines are characterized by their speed (Low, Me- dium or High) and stroke ...lowing engines are used for propulsion: 1) Low speed two stroke DE (50 - 300 RPM), 2) Medium speed four stroke DE ...
24
Thermal Management for Low-Power Handheld Electronic Devices using Thermoacoustics and Forced Convection by Vibrating Cantilever Beam.
... Specifically, thermoacoustic cooling is the results from the conversion of acoustic energy into thermal ...to thermoacoustic cooling techniques has been investigated in past years in efforts to achieve ...
192