Investigation of thermo-hydraulic performance of concentrated solar air-heater with internal multiple-fin array

Kasperski, J.; Nemś, Magdalena

doi:10.1016/j.applthermaleng.2013.04.018

Cited by 62 publications

(21 citation statements)

References 26 publications

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“…However, the maximum enhancement reported to date in the heat transfer coefficient was approximately 375%, when using three segmental rings as proposed by Ghasemi and Ranjbar . Moreover, using circular fins inside the HCE enhanced the heat transfer coefficient by 360% compared with the typical performance (Reddy and Satyanarayana), while using half‐pipe finned also contributed to enhancing the thermal efficiency of the PTC by 13% as reported by Kasperski and Nemś . On the other hand, the main challenge associated with this method is the potential pressure shocks due to the presence of swirl generators or tabulators, which could lead to glass envelope breakage.…”

Section: Further Discussionmentioning

confidence: 85%

“…A wide range of insert types have been studied in the past. Kasperski and Nemś investigated the effect of multiple‐fin arrays inside the solar receiver on the thermo‐hydraulic efficiency of the PTC compared with the smooth receiver. Up to 14% efficiency enhancement resulted in the case of half‐pipe finned arrangement when there is no limitation of the ambient velocity.…”

Section: The Effect Of Inserting Swirl Generators On the Thermal Perfmentioning

confidence: 99%

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An extensive review of various technologies for enhancing the thermal and optical performances of parabolic trough collectors

Abed

Afgan

2020

Int J Energy Res

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A wide range of engineering industrial applications require both the thermal and optical efficiencies of the system to be maximized with a reasonable low penalty for the friction factor and subsequently low losses in pressure. Among the family of concentrated solar power systems, parabolic trough collectors (PTCs), which have recently received significant attention, face similar challenges. The current work presents an extensive review of the PTC systems comparing recent and past technologies, which are widely being used to improve and enhance the thermal and optical efficiencies. Furthermore, the techniques used for single and two-phase flow modeling in numerical simulations, design variables, and experimental processes have been discussed in detail. The article also presents different numerical methods and analytical approaches of implementing the nonuniform solar distribution with different design parameters. Four main technologies are comprehensively addressed to effectively enhance the thermal performance of the PTCs; changing working heat transfer fluids, replacing the working fluids by nanofluids (single and hybrid) that have higher thermal-physical properties than those of base working fluids, inserting different tabulators with various design configurations, and finally combining the advantages of nanofluids and swirl generators in the same application. The article also critically summarizes the studies investigating the enhancement of thermal performance: use of novel design of PTCs and passive heat transfer enhancement techniques. Finally, a wide range of numerical and experimental studies are proposed for the future work related to the aforementioned main technologies. K E Y W O R D Sheat transfer enhancements, nanofluids, parabolic trough solar collectors, solar thermal energy, tabulators, thermal and optical performances

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Section: Further Discussionmentioning

confidence: 85%

Section: The Effect Of Inserting Swirl Generators On the Thermal Perfmentioning

confidence: 99%

An extensive review of various technologies for enhancing the thermal and optical performances of parabolic trough collectors

Abed

Afgan

2020

Int J Energy Res

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“…Kasperski and Nems [21] investigated multiple-fin arrays to enhance the thermal performance of parabolic trough collectors operating with air and they proved performance increase close to 14%. In another interesting study, Too and Benito [22] examined dimpled tubular absorbers and inserts.…”

Section: Introductionmentioning

confidence: 99%

Energetic and exergetic investigation of a parabolic trough collector with internal fins operating with carbon dioxide

Bellos

Tzivanidis

Daniil

2017

Int J Energy Environ Eng

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The objective of this study is to determine the energetic and exergetic enhancement of parabolic trough collector with internal fins in the absorber. Carbon dioxide is the examined working fluid to investigate the performance of the system in high temperature levels. In the first part of this study, the impact of the mass flow rate on the collector performance is analyzed and finally 0.20 kg/s is selected as the most appropriate mass flow rate exergetically. In the second part, the impact of internal fins on the system performance is investigated for operation with the optimum mass flow rate. More specifically, the absorber without fins is compared with three different fins with lengths 5, 10 and 15 mm. The final results prove that the higher fin length increases the thermal performance, while the optimum fin length exergetically is 10 mm with 45.95% exergetic efficiency when the inlet temperature is equal to 400°C. The impact of the pressure losses along the collector is taken into account in the exergetic efficiency, which is the best index for evaluating solar collectors operating with gases. The analysis is performed with Solidworks Flow Simulation, a powerful tool which allows the simultaneous thermal and optical analysis.

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“…The analytical model of the designed collector was shown in detail in Ref. [23]. Absorber is characterized by a strongly developed internal heat exchange surface.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of concentrated solar air-heater with internal multiple-fin array

Nemś

Kasperski

2016

Renewable Energy

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a b s t r a c tThis paper presents the results of experimental validation of energy conversion in a concentrated solar air-heater with internal multiple-fin array. A novel high temperature solar air heater was proposed to convert solar energy to heat for space heating in climatic conditions of Poland.The aim of the study was to verify the previously created mathematical model of heat transfer processes. The collector's performance was analysed experimentally against the reduced temperature difference. During the experiments, an electrical air heater was used to change the air temperature at the inlet of the receiver according to the test demands. Additionally, two daily performance evaluation tests were done. During the tests the all-day measured data was collected automatically and recorded at 1-min intervals. Hourly and daily thermal efficiency was calculated. Validation of the model showed its correctness and proved that the model can be accepted.

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Investigation of thermo-hydraulic performance of concentrated solar air-heater with internal multiple-fin array

Cited by 62 publications

References 26 publications

An extensive review of various technologies for enhancing the thermal and optical performances of parabolic trough collectors

An extensive review of various technologies for enhancing the thermal and optical performances of parabolic trough collectors

Energetic and exergetic investigation of a parabolic trough collector with internal fins operating with carbon dioxide

Experimental investigation of concentrated solar air-heater with internal multiple-fin array

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