Performance of a beta Stirling refrigerator with tubular evaporator and condenser having inserted twisted tapes and driven by a solar energy heat engine

Eid, Eldesouki I.; Khalaf-Allah, Reda A.; Soliman, Ahmed M.; Easa, Ammar S.

doi:10.1016/j.renene.2018.09.044

Cited by 23 publications

(2 citation statements)

References 23 publications

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“…Although ECSs were marketed during the first half of the 20th century with an electric drive, prototypes were also developed for their drive with thermal energies using the reversible liquid piston cycle [18,[56][57][58][59][60]. Research has focused on improving performance by modifying the geometry of the evaporator and condenser, increasing performance up to 32% [61]. Furthermore, working fluids, such as hydrogen, have been tested to reach a COP of 0.53, similar to commercial ADS machines [62].…”

Section: Historical Evolution Of Cooling Equipment and Main Solar Cooling Technologiesmentioning

confidence: 99%

Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications

et al. 2021

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The trend to reduce CO2 emissions in cooling processes has made it possible to increase the alternatives for integrating solar energy with thermal equipment whose viability depends on its adaptation to polygeneration schemes. Despite the enormous potential offered by the industry for cooling and heating processes, solar cooling technologies (SCT) have been explored in a limited way in the industrial sector. This work discusses the potential applications of industrial SCTs and classifies hybrid polygeneration schemes based on supplying cold, heat, electricity, and desalination of water; summarizes the leading SCTs, and details the main indicators of polygeneration configurations in terms of reductions on primary energy consumption and payback times. To achieve an energy transition in refrigeration processes, the scenarios with the most significant potential are: the food manufacturing industry (water immersion and crystallization processes), the beverage industry (fermentation and storage processes), and the mining industry (underground air conditioning).

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Section: Historical Evolution Of Cooling Equipment and Main Solar Cooling Technologiesmentioning

confidence: 99%

Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications

et al. 2021

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“…The refrigerator performance parameters COP and cooling power showed a parabolic shape with a single optimal performance value with respect to operating speed [7]. Eid et al [8] also investigate the effect of operating speed and they confirmed that cooling power has a single optimum value with respect to speed. It has been presented that, if engine speed increases too much, cycle efficiency will decrease as a result of the rapid increase in flow resistance and regenerator heat transfer losses [9].…”

mentioning

confidence: 92%

Investigation of thermal and fluidic losses and their effect on the performances of a Stirling refrigerator

Getie¹,

Lanzetta²,

Bégot³

et al. 2021

Entropie

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La conception d'une machine Stirling nécessite la compréhension des processus qui régissent leur fonctionnement pour prédire les paramètres de fonctionnement optimaux de la machine. Le modèle simple modifié utilisant les paramètres géométriques du modèle de moteur FEMTO-ST est appliqué dans cet article pour étudier l'influence des pertes en fonction de la fréquence de fonctionnement et de la pression de charge. Les variations des pertes de charge dans le régénérateur et les échangeurs de chaleur ont été étudiées en fonction de la fréquence de fonctionnement et de la pression de charge. La part des différentes pertes de puissances thermiques ainsi que leurs effets sur les performances de refroidissement ont été évalués aux différentes fréquences de fonctionnement et pressions de charge. Les pertes par frottement des fluides et les pertes dues aux imperfections du régénérateur augmentent avec la vitesse de rotation et la pression de charge. ABSTRACT. The design of a Stirling machine requires the understanding of the processes that govern their operation to predict the optimum operating parameters of the machine. The modified simple model using the geometrical parameters of the FEMTO-ST engine model is applied in this paper to investigate the trend of losses with respect to operating frequency and charging pressure. The variation of pressure drops across the regenerator and heat exchangers have been investigated as functions of operating frequency and charging pressure in order to predict the extent of fluid friction losses. The share of different power and heat losses as well as their effects on cooling performance have been evaluated at the different operating frequencies and charging pressures. The share of fluid friction loss and loss due to regenerator imperfection increase with rotational speed and charging pressure. MOTS-CLÉS. Réfrigérateur Stirling, Pertes de charge, Pertes de puissance, Performances, Régénérateur.

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Effect of sparsely placed twisted tapes installed with multiple-transverse twisted-baffles on heat transfer enhancement

Samruaisin

Kunnarak

Chuwattanakul

et al. 2020

J Therm Anal Calorim

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Performance of a beta Stirling refrigerator with tubular evaporator and condenser having inserted twisted tapes and driven by a solar energy heat engine

Cited by 23 publications

References 23 publications

Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications

Review of Polygeneration Schemes with Solar Cooling Technologies and Potential Industrial Applications

Investigation of thermal and fluidic losses and their effect on the performances of a Stirling refrigerator

Effect of sparsely placed twisted tapes installed with multiple-transverse twisted-baffles on heat transfer enhancement

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