Halalisani Shamase - Academia.edu (original) (raw)
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Papers by Halalisani Shamase
Proceedings of the ASME 20 20 International Mechanical Engineering Congress and Exposition IMECE2020, 2020
Thermo-acoustic technology offers the possibility to convert heat energy into a sound-wave that c... more Thermo-acoustic technology offers the possibility to convert heat energy into a sound-wave that can potentially be used to generate electricity through a linear alternator. The construction of a two-stage traveling-wave thermo-acoustic generator is described in this paper. The potential of conversion of heat into electricity has been investigated experimentally. The effect of the geometrical configurations of the thermo-acoustic system on its performance has been analyzed. The two thermo-acoustic engine cores were tested separately and subsequently combined to build a two-stage system. Two different configurations of engine cores have been considered namely series and parallel configuration. Hence, the effect of the orientation of the engine core has been investigated to get an insight into its effect on the output of the device. Parallel arrangement was found to be the most efficient configuration. An onset time of 3.15 minutes was recorded for the device to generate a sound wave. This system has achieved 125.7 dB corresponding to an output voltage of 486 mV. This study guides the development of more efficient electricity generators using thermo-acoustic technology.
AIUE Proceedings of the 18th Industrial and Commercial Use of Energy Conference 2020, 2020
This work describes the development and assessment of a three-stage thermo-acoustic electricity g... more This work describes the development and assessment of a three-stage thermo-acoustic electricity generator that demonstrate the potential of conversion of waste heat into useful electricity. A three-stage travelling-wave thermo-acoustic system was constructed and tested. The effect of the heat source on the potential of the device to generate electric power is analysed. The loudspeaker had used for the acoustic-to-electricity conversion in this research study. The onset temperature difference (), the onset time, and the magnitude of the electricity generated has considered as the performance indicators of the device developed. This paper provides details of the experimental investigation that consists of measuring the temperatures, the frequency of the sound-wave, and the acoustic power generated using thermocouples and sound level meter coupled to data acquisition for signal processing and visualization. Electric power supplied to the cartridge heaters at a maximum voltage range of 150 to 190 Volts. The effect of the geometrical configuration of the device concerning acoustic-to-electricity with electricity conversion is analysed. The best geometrical arrangement for generating electricity at the lowest onset temperature difference () had identified. The three-stage travelling-wave system generated the highest output voltage of approximately 2.4 V.
Proceedings of the ASME 20 20 International Mechanical Engineering Congress and Exposition IMECE2020, 2020
Thermo-acoustic technology offers the possibility to convert heat energy into a sound-wave that c... more Thermo-acoustic technology offers the possibility to convert heat energy into a sound-wave that can potentially be used to generate electricity through a linear alternator. The construction of a two-stage traveling-wave thermo-acoustic generator is described in this paper. The potential of conversion of heat into electricity has been investigated experimentally. The effect of the geometrical configurations of the thermo-acoustic system on its performance has been analyzed. The two thermo-acoustic engine cores were tested separately and subsequently combined to build a two-stage system. Two different configurations of engine cores have been considered namely series and parallel configuration. Hence, the effect of the orientation of the engine core has been investigated to get an insight into its effect on the output of the device. Parallel arrangement was found to be the most efficient configuration. An onset time of 3.15 minutes was recorded for the device to generate a sound wave. This system has achieved 125.7 dB corresponding to an output voltage of 486 mV. This study guides the development of more efficient electricity generators using thermo-acoustic technology.
AIUE Proceedings of the 18th Industrial and Commercial Use of Energy Conference 2020, 2020
This work describes the development and assessment of a three-stage thermo-acoustic electricity g... more This work describes the development and assessment of a three-stage thermo-acoustic electricity generator that demonstrate the potential of conversion of waste heat into useful electricity. A three-stage travelling-wave thermo-acoustic system was constructed and tested. The effect of the heat source on the potential of the device to generate electric power is analysed. The loudspeaker had used for the acoustic-to-electricity conversion in this research study. The onset temperature difference (), the onset time, and the magnitude of the electricity generated has considered as the performance indicators of the device developed. This paper provides details of the experimental investigation that consists of measuring the temperatures, the frequency of the sound-wave, and the acoustic power generated using thermocouples and sound level meter coupled to data acquisition for signal processing and visualization. Electric power supplied to the cartridge heaters at a maximum voltage range of 150 to 190 Volts. The effect of the geometrical configuration of the device concerning acoustic-to-electricity with electricity conversion is analysed. The best geometrical arrangement for generating electricity at the lowest onset temperature difference () had identified. The three-stage travelling-wave system generated the highest output voltage of approximately 2.4 V.