A Thermal Model for Predicting the Performance of a Solar Still with Fresnel Lens

Johnson, Ana; Mu, Lin; Park, Young H.; Valles, Delia; Wang, Huiyao; Xu, Pei; Kota, Krishna; Kuravi, Sarada

doi:10.3390/w11091860

Cited by 46 publications

(47 citation statements)

References 63 publications

(94 reference statements)

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“…After, replacing formulas (7) in ( 6), ( 11) in ( 10) and ( 14) and ( 13) in (12) and substituting in equation ( 4), the equation becomes as follows: (15) The convective heat transfer between the glass cover and the ambient air. (16) Where hc,g-a is the convection heat transfer coefficient can be determined by the suggested equation by Johnson et al [21]: (17) Where Vwd is the wind speed average in meter per second.…”

Section: The Energy Balance For the Glass Covermentioning

confidence: 99%

“…The radiative heat losses from the glass cover and the ambient air can be expressed as follows: (18) The radiation heat transfer coefficient (hr,g-sky( is given by: (19) Where the temperature of sky (Tsky) given by [20][21][22] (20) After, replacing formulas (17) in ( 16) and ( 19) in (18) and by substituting in equation ( 5), the equation becomes as follows: (21) The heat transfer equation at the glass cover is more complicated. The glass cover temperature depends on a large number of variables and different parameters.…”

Section: The Energy Balance For the Glass Covermentioning

confidence: 99%

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Theoretical Analysis of a New Design of a Concentration Based Solar Distiller

Mohammed

Mourad

2021

E3S Web Conf.

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This paper includes a theoretical study of energy balance for all parts of new design of solar concentration distiller using a parabolic concentrator with a half-cylinder basin. Our goal is to analyze the thermal efficiency of the new device to use in the Morocco's Rabat-Sale-Kenitra region. The methodology concentrates on solving the thermal collector's energy balance equations whose components are the glass cover, the brackish water and half-cylinder absorber. Numerical resolution of the energy balance equations was performed using a MATLAB code based on the method of 4th order Runge-Kutta. The results show a good theoretical performance of the new device.

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Section: The Energy Balance For the Glass Covermentioning

confidence: 99%

Section: The Energy Balance For the Glass Covermentioning

confidence: 99%

Theoretical Analysis of a New Design of a Concentration Based Solar Distiller

Mohammed

Mourad

2021

E3S Web Conf.

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“…The lenses were also used to increase a traditional solar still's performance, and the result obtained was 638% [21].…”

Section: Introductionmentioning

confidence: 99%

Energy, Exergy Analysis, and Optimizations of Collector Cover Thickness of a Solar Still in El Oued Climate, Algeria

Khechekhouche¹,

Manokar

Sathyamurthy

et al. 2021

International Journal of Photoenergy

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Researches in many laboratories on solar still desalination are concerned with increasing efficiency using only solar energy. One of the techniques is the difference in the thickness of the glass cover of the distiller. In order to see the influence of this parameter on efficiency, three similar stills with three different glass coverings were investigated. The flow of heat goes through the cover, and higher glass temperature leads to solar still productivity becoming lower. This paper presents an optimization of glass thickness ( G t ) of a conventional solar still (CSS) in El Oued climate, Algeria. Based on the experimental results, the distilled water production rate, energy, and energy efficiency of the CSS have been discussed. The results showed that the suitable G t of the CSS was 3 mm. The distilled water of around 3.15, 2.02, and 1.13 kg was produced by the CSS at energy efficiency of 30.71, 19.02, and 11.44% with the G t of 3, 5, and 6 mm, respectively. The daily average exergy efficiency of 2.46, 1.38, and 0.84% was calculated for the CSS at G t of 3, 5, and 6 mm, respectively.

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“…Saeedi et al [14] optimized the number of PV/T collectors combined with solar still to reach the highest energy performance, output electrical power, and freshwater yield. In comparison with traditional still, Johnson et al [15] obtained an enhancement in the production of potable water by 638% through the used a Fresnel Lens.…”

Section: Introductionmentioning

confidence: 99%

Energy analysis of the performance of a hybrid solar still composed of a parabolic concentrator with PV generator

2021

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In this study, a hybrid system with the addition of a greenhouse solar still is proposed to improve the efficiency, performance, and productivity of solar still. The energy analysis is performed with the help of a computer program using a set of typical design and operating parameters. The result showed that the hybrid still coupled with a PCC (parabolic cylindrical concentrator) can produce 110 l/m2 per day. The temperatures of the basin and water of the hybrid still with PCC are 140 and 100 °C, respectively. The causes are the several sources of temperatures are added together in a single system. The obtained values of efficiency, production, and performance are 160%, 100 l/m2, and 2, respectively. The results show also that the temperature and production in the month of January are 70 °C and 50 l/m2 per day, respectively, despite the negative influence of meteorological parameters. The performance of the suggested hybrid still is found to be higher than that of the single still without a concentrator.

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A Thermal Model for Predicting the Performance of a Solar Still with Fresnel Lens

Cited by 46 publications

References 63 publications

Theoretical Analysis of a New Design of a Concentration Based Solar Distiller

Theoretical Analysis of a New Design of a Concentration Based Solar Distiller

Energy, Exergy Analysis, and Optimizations of Collector Cover Thickness of a Solar Still in El Oued Climate, Algeria

Energy analysis of the performance of a hybrid solar still composed of a parabolic concentrator with PV generator

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