Theoretical approach of a flat-plate solar collector taking into account the absorption and emission within glass cover layer

Khoukhi, Maatouk; Maruyama, Shigenao

doi:10.1016/j.solener.2005.06.002

Cited by 48 publications

(20 citation statements)

References 8 publications

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“…Different researchers have studied the using of various categories of solar dryers for the drying characteristics of different vegetables and fruits. According to Karna & Koo, 2017;Khoukhi & Maruyama, 2006;Kong, Lin, & Li, 2013; they reported the 26.25 W/m 2 for convective heat transfer coefficient of asparagus sample under the sun-drying condition. Other studies (Kumar, Khatak, Sahdev, & Prakash, 2011;Kumar, Sansaniwal, & Khatak, 2015;Kumar & Tiwari, 2009) have been reported that drying rate under the hybrid dryer was greater than sun-drying with the efficiency of 15% during the summer season.…”

mentioning

confidence: 99%

Retracted: Experimentally investigated the asparagus (Asparagus officinalis L.) drying with flat‐plate collector under the natural convection indirect solar dryer

Ullah

Kang

Khattak

et al. 2018

Food Science & Nutrition

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The above article, published online on 21 February 2018 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors, the journal Editor in Chief, Y. Martin Lo, and Wiley Periodicals, Inc. The retraction has been agreed at the authors’ request due to unattributed overlap between this article and the following article published in the Journal of Mechanical Engineering and Sciences, “Analysis of ginger drying inside a natural convection indirect solar dryer: An experimental study” by S. K. Sansaniwal and M. Kumar, Volume 9, pp. 1671–1685.

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mentioning

confidence: 99%

Retracted: Experimentally investigated the asparagus (Asparagus officinalis L.) drying with flat‐plate collector under the natural convection indirect solar dryer

Ullah

Kang

Khattak

et al. 2018

Food Science & Nutrition

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“…Therefore, accurate prediction of the thermal performance of solar collector system strongly depends on how the glass cover material is analysed. Though almost all the studies reported assume that glass cover of a system is transparent for the solar range and opaque for the infrared radiation [27], only few studies have reported on the influence of thickness of glazing materials on the performance of solar collector.…”

Section: Influence Of Cover Materials On the Collector Performancementioning

confidence: 99%

“…The effect of the glass thickness can clearly be depicted in Figure 7, whereby collector with 6 mm thickness gave poor performance, while 4 mm thickness gave the best performance. Khoukhi et al [27] reported that, on increasing the thickness of the glass cover from 3 mm to 6 mm, the steady heat flux through the cover decreases and, therefore, thinner glass (3 mm) is more suitable with regard to the cost and the weight of the solar collector system when compared to 6 mm thickness. These results also support the conclusion given by Vejen et al [29] who outlines good selection of glazing materials as one of the factors that can improve the performance of solar collector.…”

Section: Temperature and Energy Profile Of Collectors With Different mentioning

confidence: 99%

Effect of Glass Thickness on Performance of Flat Plate Solar Collectors for Fruits Drying

2014

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This study aimed at investigating the effect of thickness of glazing material on the performance of flat plate solar collectors. Performance of solar collector is affected by glaze transmittance, absorptance, and reflectance which results into major heat losses in the system. Four solar collector models with different glass thicknesses were designed, constructed, and experimentally tested for their performances. Collectors were both oriented to northsouth direction and tilted to an angle of 10° with the ground toward north direction. The area of each collector model was 0.72 m2with a depth of 0.15 m. Low iron (extra clear) glass of thicknesses 3 mm, 4 mm, 5 mm, and 6 mm was used as glazing materials. As a control, all collector performances were analysed and compared using a glass of 5 mm thickness and then with glass of different thickness. The results showed that change in glass thickness results into variation in collector efficiency. Collector with 4 mm glass thick gave the best efficiency of 35.4% compared to 27.8% for 6 mm glass thick. However, the use of glass of 4 mm thick needs precautions in handling and during placement to the collector to avoid extra costs due to breakage.

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“…However, reection and absorption of the glass cover can affect the performance of the solar thermal system. [7][8][9] The coverings made of glass have refractive index of 1.5, which reect 8% of normally incident light on air/glass interface and degrade the performance of the solar thermal system. 10 In addition, the dust accumulations on the surface also affect the performance of solar thermal system.…”

Section: Introductionmentioning

confidence: 99%

A superhydrophobic solar selective absorber used in a flat plate solar collector

et al. 2017

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A new kind of superhydrophobic (SH) solar selective absorber (SSA) used in a low-temperature flat plate solar collector is proposed. Getting rid of the glass cover can improve the performance of the flat plate solar collector. SSA with a SH coating can maintain the efficiency in a practical outdoor working environment. The SH coating can be made by a simple Sol-Gel method; the water contact angle of SH SSA can reach up to 157 and the sliding angle is less than 2 . The self-cleaning of SH SSA can be realized by rainwater or natural wind. The solar absorptance of SH SSA is still 89.46% after treating in a neutral salt spray for 48 h, which indicates that SH SSA has good corrosion resistance and is suitable to the outdoor environment. Thermal performance tests show that the flat plat solar collector with SH SSA has excellent thermal performance for low-temperature application.

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Theoretical approach of a flat-plate solar collector taking into account the absorption and emission within glass cover layer

Cited by 48 publications

References 8 publications

Retracted: Experimentally investigated the asparagus (Asparagus officinalis L.) drying with flat‐plate collector under the natural convection indirect solar dryer

Retracted: Experimentally investigated the asparagus (Asparagus officinalis L.) drying with flat‐plate collector under the natural convection indirect solar dryer

Effect of Glass Thickness on Performance of Flat Plate Solar Collectors for Fruits Drying

A superhydrophobic solar selective absorber used in a flat plate solar collector

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