Experimental thermodynamic analysis of a forced convection solar air heater using absorber plate with pin-fins

Sivakumar, Sri; Siva, K.; Mohanraj, M.

doi:10.1007/s10973-018-07998-5

Cited by 54 publications

(14 citation statements)

References 16 publications

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“…10a highlighted that η th of SLSC was found to be higher than FPSC by 49.8%, 75%, 41% and 73%, respectively, for air mass flow rate of 0.006, 0.01, 0.015 and 0.02 kg s −1 . A solar collector with pin-fin type absorber plate demonstrated only 3-12% increase in the thermal efficiency of collector with respect to plain absorber plate [23]. It was also reported in a recent study that addition of only fins to arc shaped air heater led to maximum of 7% improvement in the thermal efficiency, but addition of fins along with baffles led to 28% increase in the thermal efficiency [21].…”

Section: Comparison Of Thermal Performance Of Fpsc With Slscmentioning

confidence: 54%

“…The improved heat transfer in the collector with fin/turbulators is attributed to the promotion of turbulence, improved mixing and breaking of thermal boundary layer found adjacent to the absorber plate [22]. Sivakumar et al [23] found 17 °C higher outlet air temperature, 12% higher thermal efficiency along with 60% increase in pressure drop in pin-fin collector as compared to conventional FPSC. Manoram et al [24] reported the significant effect of pitchto-diameter ratio and the number of dimples on the thermal efficiency and friction factor of solar water heating system.…”

Section: Introductionmentioning

confidence: 99%

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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: Comparison Of Thermal Performance Of Fpsc With Slscmentioning

confidence: 54%

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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“…They concluded that the highest efficiency was 62.5% for double pass baffle and 55% for singlepass baffle for the mass flow rate of 0.032 kg/s. In a further investigation, Sivakumar et al 18 experimentally investigated the thermodynamic performance of forced convection solar air heater using a pin-fin absorber plate. In their study, it has been observed that the pin-fin absorber has improved the system's performance with the least amount of pressure drop across the solar air heater than the smooth SAH.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of domestic solar air heating system using V-shaped baffles – An experimental study

Rajendran¹,

Ramasubbu²,

Karthick

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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An experimental study has been carried out to enhance a solar air heater’s performance by integrating artificial roughness through baffles on the absorber plate. In this paper, the thermal and energy matrices analysis of a Solar Air Heater (SAH) roughened with V up perforated baffles have been investigated. The effect of various mass flow rates on the SAH was analyzed with and without baffles. Experimental outputs like outlet air temperature, useful energy (heat) gain and thermal efficiency were evaluated to confirm the performance improvement. The baffled absorber plate SAH was found to give the maximum thermal efficiency and useful energy gain of 89.3% and 1321.37 W at a mass flow rate of 0.0346 kg/s, 13% and 12% higher than SAH without baffle. This result showed that the V up-shaped ribs in flow arrangement provide better thermal performance than smooth plate SAH for the parameter investigated. Energy matrices analysis and carbon dioxide mitigation of the SAH system were also analyzed.

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“…14 In another work, the energy and exergy efficiency of a SACusing pin-fin absorber were improved by 3-12% and 2-11%, respectively compared to flat absorber. 15…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on jet impingement solar air collectors using pin-fin absorber

Kannan¹,

Mohanraj

Sathyabalan³

2020

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this paper, the performances of a novel jet impingement solar air collector (JISAC) using flat and pin-fin absorbers were experimentally investigated. The experimental observations in a JISAC have been made under the climatic conditions of Coimbatore city in India during the year 2019. The thermo-hydraulic analyses were conduced to study the influence of pressure drop across the perforated jet plate. The effects of solar irradiation, ambient temperature, ambient wind velocity and air mass flow rate through the JISAC duct using flat and pin-fin absorbers were studied. The air mass flow rate through the JISAC was optimized to 0.025 kg/s based on the experimental trials. Thermodynamic performance comparisons have been made among the flat and pin-fin absorbers. The results showed that, the JISAC using pin-fin absorber has 2–7°C higher air temperature at the outlet with 3–7%, 2–6% and 2–6% improved energy efficiency, thermo-hydraulic efficiency and exergy efficiency, respectively when compared to the JISAC using flat absorber. The pressure drop across the JISAC duct is about 90% higher when compared to the conventional solar air collectors. The pressure drop through the jet plate has increased the air velocity impinging on the absorber. As a result, the heat transfer coefficient between air and the absorber has been significantly improved.

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Experimental thermodynamic analysis of a forced convection solar air heater using absorber plate with pin-fins

Cited by 54 publications

References 16 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

Performance analysis of domestic solar air heating system using V-shaped baffles – An experimental study

Experimental investigations on jet impingement solar air collectors using pin-fin absorber

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