Thermoacoustic Stirling Heat Pump Working as a Heater

Bassem, Mohamed Mehdi; Ueda, Yuichi; Akisawa, Atsushi

doi:10.1143/apex.4.107301

Cited by 13 publications

(14 citation statements)

References 13 publications

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“…Moreover, in the calculation the regenerator is estimated to be perfectly insulated which is not possible in experiments. On the other hand, in the experiment (Kikuchi et al, 2015;Bassem et al, 2011b), an elastic membrane was inserted in the looped tube to minimize the acoustic streaming. This makes the quantitative discrepancy between experiment and calculation almost constant in the temperature range 50 °C -160 °C as shown in Fig.…”

Section: Numerical Results and Discussion 31 Heating Performancementioning

confidence: 99%

“…In Fig. 4, the calculated COP is shown as a function of the regenerator flow channel radius normalized by the thermal penetration depth (Bassem et al, 2011b) . The simulation was performed for three hot heat exchanger temperatures.…”

Section: Regenerator Optimizationmentioning

confidence: 99%

“…The simulation was performed for three hot heat exchanger temperatures. The pressure amplitude at the junction between the branched and looped tubes was kept at 20 kPa which is about 4% of the mean pressure of the working gas, a value used by Bassem et al (2011b) in their experiments. As seen in Fig.…”

Section: Regenerator Optimizationmentioning

confidence: 99%

“…A first attempt was done by Tijani and Spoelstra (2012) when they constructed a thermoacoustic device working in the temperature range of 10 °C to 80 °C. In 2011, a thermoacoustic heater reaching a temperature above 350 °C was constructed (Bassem et al, 2011b). Based on the experimental analysis, it was shown that the thermal power was generated through a thermodynamic cycle similar to the inherently reversible Stirling cycle (Ceperley, 1979) allowing an efficient energy conversion from acoustic power into thermal power.…”

Section: Introductionmentioning

confidence: 99%

“…Later in 2015, Kikuchi et al (2015) constructed a thermoacoustic heat pump and measured its performance. Both studies (Bassem et al, 2011b;Kikuchi et al, 2015) investigated the thermoacoustic device only experimentally. However, no numerical simulation has been performed yet.…”

Section: Introductionmentioning

confidence: 99%

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Numerical investigation on a travelling wave thermoacoustic heat pump

Nasr

Bassem

Ueda

et al. 2018

JTST

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A thermoacoustic heat pump heater is a device having the ability to produce heat from acoustic power. The heat pump investigated was composed of an acoustic driver, a branched tube, and a looped tube. A porous component composed of many stacked steel screen meshes, called regenerator, was installed inside the looped tube. When an acoustic wave is supplied to the looped tube, filled with nitrogen gas at 0.5 MPa, heat pumping spontaneously occurs inside the regenerator. A numerical code was developed and tested. Then, the coefficient of performance was calculated for different temperatures by optimizing the regenerator flow channel radius and position inside the looped tube. It was found that the temperature affects considerably the regenerator optimum parameters.

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Section: Numerical Results and Discussion 31 Heating Performancementioning

confidence: 99%

Section: Regenerator Optimizationmentioning

confidence: 99%

Section: Regenerator Optimizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Numerical investigation on a travelling wave thermoacoustic heat pump

Nasr

Bassem

Ueda

et al. 2018

JTST

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Distillation technology – still young and full of breakthrough opportunities

Kiss

2013

J of Chemical Tech & Biotech

230

144

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Throughout history, distillation has been the most widespread separation method. However, despite its simplicity and flexibility, distillation still remains very energy inefficient. Novel distillation concepts based on process intensification, can deliver major benefits, not just in terms of significantly lower energy use, but also in reducing capital investment and improving eco-efficiency. While very likely to remain the separation technology of choice for the next decades, there is no doubt that distillation technology needs to make radical changes in order to meet the demands of the energy-conscious modern society. This article aims to show that in spite of its long age, distillation technology is still young and full of breakthrough opportunities. Moreover, it provides a broad overview of the recent developments in distillation based on process intensification principles, for example heat pump assisted distillation (e.g. vapor compression or compression-resorption), heat-integrated distillation column, membrane distillation, HiGee distillation, cyclic distillation, thermally coupled distillation systems (Petlyuk), dividingwall column, and reactive distillation. These developments as well as the future perspectives of distillation are discussed in the context of changes towards a more energy efficient and sustainable chemical process industry. Several key examples are also included to illustrate the astonishing potential of these new distillation concepts to significantly reduce the capital and operating cost at industrial scale.

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Traveling-wave thermoacoustic refrigerator driven by a multistage traveling-wave thermoacoustic engine

Sharify

Hasegawa

2017

Applied Thermal Engineering

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A double-loop-type traveling-wave thermoacoustic refrigerator driven by a multistage traveling-wave engine was constructed. To reduce the onset temperature for thermoacoustic oscillations and achieve a refrigerator temperature of −100 °C, three etched stainless steel mesh regenerators were installed close to the sweet spot within the prime mover loop and one regenerator was fixed in the refrigerator loop. The maximum measured COP of the whole system at-50°C, was 0.029. Gas oscillations occurred when the hot temperature of the regenerator in the prime mover loop exceeded 85 °C. On the other hand, refrigeration (−42.3 °C) was observed when the hot heat exchanger temperature reached 90 °C, which is lower than the boiling point of water. Furthermore, the refrigerator achieved a minimum cold temperature of −107.4 °C when the hot temperature was 270 °C.

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Thermoacoustic Stirling Heat Pump Working as a Heater

Cited by 13 publications

References 13 publications

Numerical investigation on a travelling wave thermoacoustic heat pump

Numerical investigation on a travelling wave thermoacoustic heat pump

Distillation technology – still young and full of breakthrough opportunities

Traveling-wave thermoacoustic refrigerator driven by a multistage traveling-wave thermoacoustic engine

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