Analytical approach for evaluation of thermo hydraulic performance of roughened solar air heater

Gawande, Vipin B.; Dhoble, Ashwinkumar S.; Zodpe, D. B.; Chamoli, Sunil

doi:10.1016/j.csite.2016.03.003

Cited by 30 publications

(4 citation statements)

References 13 publications

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“…In this regard, modeling and simulation is used for projecting the involved heat transfer phenomena and air flow pattern inside the collector under different operating conditions. Thus, it provides the opportunity of making the right decision about configuration of fin, optimization of geometrical parameters, approximation of collector performance, and scope of modification during design and development stage leading to time and resources saving [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Heat transfer augmentation of flat plate solar collector through finite element-based parametric study

Rani

Tripathy

2020

J Therm Anal Calorim

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The introduction of fins and baffles on the absorber plate is an effective way to ameliorate the thermal performance of flat plate solar collector (FPSC), but obstructs the air passage leading to considerable pumping power penalty. In the current work, attempt is made to improve the overall performance of collector with the incorporation of hollow semicircular loop fins and rectangular baffles over the absorber plate for air mass flow rate ranging from 0.006 to 0.02 kg s −1 . A parametric study was carried out with finite element approach considering different radius (2-4 cm), pitch (6-20 cm) and number of semicircular loops per row in transverse direction (3-8 loops). Compared to intermittent loops, placement of continuous staggered semicircular loops was more effective for attaining uniform profile and higher magnitude of air temperature at collector outlet. With regard to FPSC, finned collector provided 2.64-2.95 times greater Nusselt number and 41-75% higher thermal efficiency, as well as exhibited 8.38-10.4 K higher collector outlet average air temperature. The pressure drop noted for FPSC was 0.14 Pa and increased to the range of 0.5-0.7 Pa with the addition of loops and baffles at an air mass flow rate of 0.01 kg s −1 . Collector having baffles and continuous semicircular loops of radius 3 cm, made up of 2-mm-thick wire, presented maximum thermohydraulic performance factor of 1.73 in conjunction with showing maximum magnitude and uniform profile of collector outlet temperature. The modified collector with semicircular loops along with baffles will find its application in efficient drying of agricultural commodities.

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Section: Introductionmentioning

confidence: 99%

Heat transfer augmentation of flat plate solar collector through finite element-based parametric study

Rani

Tripathy

2020

J Therm Anal Calorim

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“…Several attempts have been carried out to investigate thermo-hydraulic performances of roughened solar air heater numerically [6,7] and experimentally [8][9][10]. They proved that roughened solar air heaters are quantitatively and qualitatively better than conventional solar air heater.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Analysis of Thermal-Hydraulic Performance of Curved and Plate Flat Solar Air Heaters; A Comparative Study

Guellai¹,

Labed²,

Moummi³

et al. 2019

I2M

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This paper presents a comparative study between the thermal-hydraulic performances of two types of solar air heaters (SAHs) having the same components: i) is a simple pass solar flat plate collector, and ii) is a simple pass curvilinear solar collector. Thus, we carried out studies to compare the thermal efficiencies and hydraulic performances of both SAHs, in order to compare their effective efficiencies. The experimental measures show that, at different air mass flow rates, the highest efficiencies were obtained from the curvilinear SAH and no significant difference between the pressure drops in both SAHs is noticed. In addition, this study has allowed us to show that the curvilinear form is an efficient method to improve the SAH performances, it permits a good temperature distribution in the air flow duct of the collector.

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“…Solar air heaters are thermal systems used to convert the incident solar radiation into heat used to warm the air. These air heaters are used today in many applications like space heating for comfort conditions, drying agricultural plants and marine products [5]. The use of air heater reduces the dependence on fossil fuels.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Solar Air Heating

Chaichan,

Ali,

Abass

2018

alkej

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A new type of solar air heater was designed, fabricated, and tested in Baghdad, Iraq winter conditions. The heater consists of two main parts. The horizontal section was filled with the black colored iron chip while the vertical part has five pipes filled with Iraqi paraffin wax. A fan was fixed at the exit of the air. Two cases were studied: when the air moved by natural convection and when forced convection moved it. The studied air heater has proven its effectiveness as it heated the air passing through it to high temperatures. The results manifest that using little air movement makes the temperatures, stored energies, and efficiencies of the two studied cases converge. The suitable solar intensity of Baghdad city makes the use of solar air heater suitable to reduce the electricity and fossil fuels consumption.

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Analytical approach for evaluation of thermo hydraulic performance of roughened solar air heater

Cited by 30 publications

References 13 publications

Heat transfer augmentation of flat plate solar collector through finite element-based parametric study

Heat transfer augmentation of flat plate solar collector through finite element-based parametric study

Measurement and Analysis of Thermal-Hydraulic Performance of Curved and Plate Flat Solar Air Heaters; A Comparative Study

Experimental Study on Solar Air Heating

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