Experimental Analysis of an Economical Lab Demonstration Prototype of a Thermo Acoustic Refrigerator (TAR)

Nathad, Ammar; Ahmed, Farzan; Khalid, Marwan; Kumar, Rahul; Hafeez, Hamza

doi:10.1016/j.egypro.2018.11.199

Cited by 7 publications

(5 citation statements)

References 5 publications

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“…The material of the stack is essential to TAR performance. According to Nathad et al [12], the thermal conductivity contributes to thermal conduction of the working gas and stack material. According to Zolpakar et al [5], the stack should be made of a material with lower thermal conductivity and a higher heat capacity than the working fluid.…”

Section: Stack Materialsmentioning

confidence: 99%

“…The TAR model which was 624 mm long with its largest diameter as 110 mm. The larger diameter (D1) tapered by applying a ratio of D2/D1 = 0.54 to 110 mm PVC tube, then obtained a smaller diameter (D2) [18]. Regarded seven stack lengths (SL) of polylactic acid (PLA) material ranging from 15 mm to 45 mm with a gap spacing of 2𝛾𝛾 0 = 0.6 mm, where 𝛾𝛾 0 is the half distance between two stack plates spacing.…”

Section: Simulation Model and Geometrical Modellingmentioning

confidence: 99%

See 1 more Smart Citation

Impact of stack length on performance of standing wave thermoacoustic refrigerator

Tshowa,

Ngonda,

Nqabisa

2024

E3S Web Conf.

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The low coefficient of performance of thermoacoustic refrigerators has limited their development. The goal of this paper is to investigate the effect of different stack lengths on standing wave thermoacoustic refrigerator (TAR) performance. The stack is essential in TAR because it expands the gas-solid interface, allowing for a greater temperature difference between the warm and cold regions. Hence literature studies on stack length, geometry, plate spacing, and material have been investigated. A quantitative analysis was performed to determine an effective TAR design by numerically modelling three geometries using COMSOL Multiphysics 6.0. A quarter wavelength resonator tube was designed using a 2D axisymmetric model. The acoustic wave and energy fields in solids were studied using conjugate heat transfer, with the fluid flow considered laminar and helium as the working gas. The optimal TAR design was chosen based on the lowest temperature difference between the three simulated geometries. Seven numerical models were simulated for stack lengths ranging from 15 mm to 45 mm, revealing that COP increased as stack length decreased, while the temperature difference decreased.

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Section: Stack Materialsmentioning

confidence: 99%

Section: Simulation Model and Geometrical Modellingmentioning

confidence: 99%

Impact of stack length on performance of standing wave thermoacoustic refrigerator

Tshowa,

Ngonda,

Nqabisa

2024

E3S Web Conf.

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“…Un refrigerador funciona mediante un proceso termodinámico que extrae calor de un recinto cerrado y de los cuerpos contenidos dentro para bajar la temperatura [15]. Este proceso, denominado refrigeración, está fundamentado en las leyes de la termodinámica, y sus aplicaciones son múltiples.…”

Section: Funcionamiento Del Refrigeradorunclassified

“…Aplicando la segunda ley de la termodinámica al balance energético de la ecuación (15), se identifica que, de todo el calor rechazado al ambiente (Q H ), la calidad energética es el calor extraído (Q L ) de la cabina, que se produce artificialmente por una fracción de trabajo (W in ) introducido al sistema. Considerando el concepto de eficiencia energética, el ciclo de refrigeración óptimo es aquel que remueve el mayor calor del espacio refrigerado, empleando el mínimo trabajo posible.…”

Section: Funcionamiento Del Refrigeradorunclassified

Implementación de medidas de eficiencia energética para la construcción factible de un refrigerador comercial con suministro de energía solar fotovoltaica

Reina

Arredondo

Tascón

2022

Cien.Ing.Neogranadina

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El alto consumo energético de los refrigeradores y un suministro eléctrico intermitente incrementa el costo de la factura eléctrica y afecta los productos refrigerados, respectivamente. Así lo manifiestan diversos tenderos que adquieren estos equipos para actividad comercial. Estos inconvenientes preocupan al fabricante, que considera que la oferta de sus equipos podría afectarse. El objetivo de este artículo es construir un refrigerador comercial de mayor eficiencia energética, abastecido con energía solar fotovoltaica. El desarrollo inicia con un balance energético de un refrigerador convencional, para identificar posibles mejoras energéticas. Posteriormente, se implementan cuatro medidas que permiten la construcción de un refrigerador con mayor desempeño energético y una instalación solar fotovoltaica, que provee electricidad confiable. Se concluye que, mediante una oportuna gestión energética, es factible técnica y económicamente la construcción de refrigeradores eficientes que operen con energía limpia y renovable.

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“…(2) The loudspeaker used in the driver needs to be of a higher power. (3) The shape of the speaker has a significant effect, as if it does not fit properly into the tube, it might cause gas leakage and power loss which diminishes the Thermoacoustic effect [39]. Saechan et al described delta modelling and fabricated a laboratory demonstrator which achieved a minimum temperature of −8.3 • C at a storage condition of +8 • C at a 7 W cooling power.…”

Section: Challenges and State Of Developmentmentioning

confidence: 99%

A Review of Recent Advances in Emerging Alternative Heating and Cooling Technologies

2021

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The heating and cooling industry underpins everything we do, e.g., manufacturing, commercial and residential applications. Many of these applications invariably use mechanical refrigeration technologies, consequently contributing significantly to the environmental impacts of the refrigeration, air conditioning, and heat pump (RACHP) industry both through direct and indirect emissions of CO2. To reduce these emissions, research and development worldwide aim to improve the performance of conventional systems and the development of new refrigeration technologies of potentially much lower environmental impacts. As we transition to a low carbon economy, there are sizable environmental and economic benefits from developing and using efficient, innovative, low carbon heating and cooling technologies that reduce energy use and carbon emissions. This paper provides an up-to-date and comprehensive critical review and evaluation of recent advances in emerging alternative heating and cooling technologies that have the potential to reduce the environmental impacts of refrigeration in the RACHP sector. The paper highlights the basic working principle of operation, its main applications, the challenges and opportunities in penetrating the market. The paper also highlights further research and development needed to accelerate the development and adoption of these alternative refrigeration technologies by the sector. Most of the technologies reviewed have a Technology Readiness Level (TRL) of 3–4, except electrocaloric technology which is less ready compared to its counterparts with a TRL of 1–2 at this stage. Furthermore, most technologies have capacities ranging between a few kilowatts to a maximum of 7 kW with a coefficient of performance COP between 1 and 10 reported in the literature.

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Experimental Analysis of an Economical Lab Demonstration Prototype of a Thermo Acoustic Refrigerator (TAR)

Cited by 7 publications

References 5 publications

Impact of stack length on performance of standing wave thermoacoustic refrigerator

Impact of stack length on performance of standing wave thermoacoustic refrigerator

Implementación de medidas de eficiencia energética para la construcción factible de un refrigerador comercial con suministro de energía solar fotovoltaica

A Review of Recent Advances in Emerging Alternative Heating and Cooling Technologies

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