Experimental study on a solar air heater with various perforated covers

Nowzari, Raheleh; Aldabbagh, L.B.Y.

doi:10.1007/s12046-017-0711-z

Cited by 10 publications

(10 citation statements)

References 24 publications

(29 reference statements)

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“…During the experiments, the following measurements were carried out on daily basis: global flux received by the flat plate solar collector, total daily irradiation, ambient temperature and temperatures in various points of the three configurations of the system studied. These basic physical parameters are reported in order to determine and compare the thermal performance of the (2) (3) (4) (5) (6) three configurations of the flat plate solar collector. Figure 3 shows that the ambient temperature (Tam) and the instantaneous solar flux increase gradually to reach a maximum value before decreasing.…”

Section: Resultsmentioning

confidence: 99%

“…Aldabbagh et al [21] investigated a single-pass solar air heater with 10 wire mesh layers in a channel with a high of 10 cm, and the maximum value of ∆T obtained was 27 °C at air mass flow rate of 0.012 kg/s. Nowzari and Aldabbagh [6] investigated a counter-flow collector with a normal plexiglas cover, and the maximum value of ∆T obtained was 34.8 °C at air mass flow rate of 0.011 kg/s. Figure 7 illustrates the variation of the thermal efficiency with the time for the three configurations of the flat plate solar collector.…”

Section: Resultsmentioning

confidence: 99%

“…They found that applying obstacles can improve efficiency in comparison to simple ones. Nowzari and Aldabbagh [6] investigated experimentally the thermal performances of single and counter flow solar air heaters with a normal cover and with quarter and half perforated covers. In this work, on two of the perforated covers, the holes were made in the first quarter at the top side of the covers.…”

Section: Introductionmentioning

confidence: 99%

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Thermal performance amelioration of flat plate solar collector of an indirect dryer

Blaise¹,

Magloire²,

Gbaha³

2018

MMEP

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Article presents an experimental investigation for the comparison of thermal performance of three different configurations flat plate solar collector. These flat plate solar collectors consist of glass cover and aluminium absorber plate which is painted with black paint. The edge and bottom surfaces are thermally insulated with a polystyrene layer for the first configuration, a polystyrene layer covered with a sheet of aluminium paper for the second one and a polystyrene layer covered with a sheet of aluminium paper and containing baffles for the third configuration. In this experiment, thermal efficiency of flat plate solar collector integrated with baffles was studied and compared with the two ordinary flat plate collectors. The results showed that integrating flat plate solar collector with baffles significantly increased the thermal efficiency of the system. It was noted that a mean thermal efficiency is 20.3 %, 29.8 % and 35.1 % for the first, second and third configuration, respectively. The results show a maximum temperature rise of 23.5 °C, 31.6 °C and 34.6 °C with respect to the inlet air temperature, for the first, second and third configuration, respectively. Baffles improve the thermal performance of the flat plate solar collector by increasing the outlet temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal performance amelioration of flat plate solar collector of an indirect dryer

Blaise¹,

Magloire²,

Gbaha³

2018

MMEP

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“…Each mesh layer was painted in a black color to increase absorptivity. The wire meshes used in this collector were similar to the ones used by other researchers [12,15,16].…”

Section: Performed Experimental Researchmentioning

confidence: 99%

Selecting the Optimal Configuration for a Solar Air Heater Using the Grey–Taguchi Method

2020

Self Cite

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In this study, a typical Grey-Taguchi method has been applied in order to select the optimal configuration of a solar air heater to achieve optimum performance. The analysis is performed for different system configurations in terms of collector type, mass flow rate, and cover type. The Grey-Taguchi method, which requires the minimum possible numbers of the demanded experiments for accomplishing a robust statistical decision for a given experimental problem, has been employed, and temperature difference and thermal performance have been used as the two main criteria. It is found that by considering the temperature difference criterion, at a mass flow rate of 0.011 kg/s, the best configuration is the double-pass solar collector owning a one-fourth pierced Plexiglas cover with a distance of 60 mm between the centers of the holes. On the other hand, by considering the thermal performance as the criterion, the best configuration at a mass flow rate of 0.032 kg/s is found to be the double-pass solar collector holding a half-pierced Plexiglas cover and a distance of 60 mm distance between the centers of the holes. Finally, once both factors are taken into consideration, the optimal configuration suggested by the method is the double-pass collector with a one-quarter pierced Plexiglas cover. The method also suggests keeping a 30 mm distance between the centers of the holes and applying 0.032 kg/s of the mass flow rate to achieve the highest performance.

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“…V-ribs arranged in transverse direction which were tested recently showed outstanding performance and in future these V-rib arrays could be arranged inclined the direction. RahelehNowzari and L B Y Aldabbagh [5]stated that the distance between the lower glass and the absorber in double pass solar air pre-heater should be 5.5cm. The results proved that conventional air pre heater is less efficient then baffled solar heater.…”

Section: IImentioning

confidence: 99%

Study of Performance of Solar Air Preheater using different Parameters

Kadam¹

2019

IJRASET

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Nowadays energy is the biggest concern of our society due to the rapid depletion of fossil fuel reserves. So there is need to develop and implement more energy efficient technologies based on renewable energy sources. roughness, double pass solar air preheater, aluminum spring on the absorber plate and also with the use of baffle arrangement. Further the efficiency of the solar air pre heater can be increased by the changing the orientation of the air pre heater with the change direction of the sun. In Solar air preheater heat is generally transferred between Air and absorber plate. Generally thermal performance of the solar air preheater is low due to minimum heat transfer rate between Air and Absorber plate. So the heat transfer rates can be improved by the use of Artificial

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Experimental study on a solar air heater with various perforated covers

Cited by 10 publications

References 24 publications

Thermal performance amelioration of flat plate solar collector of an indirect dryer

Thermal performance amelioration of flat plate solar collector of an indirect dryer

Selecting the Optimal Configuration for a Solar Air Heater Using the Grey–Taguchi Method

Study of Performance of Solar Air Preheater using different Parameters

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