Comments on “analysis of a V-groove solar collector with a selective glass cover” by R. M. S. Gama, J. A. O. Pessanka, J. A. R. Parise and F. E. M. Samboya

Abstract Various human activities have led to the consumption of large quantities of pure water, which has led researchers to find efficient and economical methods for desalinating seawater and water containing impurities. In this review paper, solar energy where it is permanent, abundant and environmentally friendly, to produce pure water was discussed using a new solar distillation device, representing the paper’s novelty. The distillation was designed and used in the way led to increase efficiency and improve productivity by adding a solar collector to the system and equipped with a tank containing phase change material (PCM). It has a low melting point and can change the phase by absorbing the system’s latent heat to maintain the system’s temperature. Which contributes to increasing the distillation period even after sunset, thus increasing the daily productivity of freshwater. Using phase change materials will increase distillation hours from (3-4) hours after sunset, increasing the amount of production between (75 - 90) %.

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An Inverse Method for Parameter Retrieval in Solar Thermal Collector With a Single Glass Cover

10.1115/power2021-65601 ◽

2021 ◽

Author(s):

Ranjan Das

Keyword(s):

Solar Energy ◽

Cost Function ◽

Solar Collector ◽

Cost Effective ◽

Solar Thermal ◽

Ambient Conditions ◽

Unknown Parameters ◽

Solution Approach ◽

Glass Cover ◽

Design Variables

Abstract The present article highlights the implementation of differential evolution (DE)-assisted metaheuristic optimizer to provide the solution of an inverse multi-variable problem related to a flat absorber solar collector consisting of a single glass. For satisfying a given heating requirement from the solar collector, the necessary tilt angle and the thickness of the glass cover are simultaneously predicted using the proposed DE methodology. The existing study of inverse multi-variable optimization analysis has been done for dynamic values of solar energy radiation and different ambient conditions commonly encountered in various geographical locations of India. Formulation of the current research involves the minimization of a newly proposed cost function involving the required and the acquired heat transfer rates from the solar collector in Euclidean space. The solution approach then utilizes a dynamic exchange between evolutionary metaheuristic DE and a well-validated forward solver containing analytical expressions of heat energy balance within the solar collector. Variations of cost function and the estimated design variables are mainly studied to visualize the algorithm’s behavior for a single gazing-based solar thermal device. Multiple possible groupings of the unknown parameters of the solar collector are revealed, which always collectively result in a desired heating requirement from the solar collector. Sensitivity indices related to the design variables are evaluated for ascertaining the relative importance of parameter selection. Encouraging opportunity is found towards the system’s size reduction through sparing selection of inclination angle. The current study provides a convenient and cost-effective tool to select the necessary inclination and glass covers to obtain low to medium heating requirements from the available incident solar energy.

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Effect of Color Coating of Cover Plate on Thermal Behavior of Flat Plate Solar Collector

Energies ◽

10.3390/en13246696 ◽

2020 ◽

Vol 13 (24) ◽

pp. 6696

Author(s):

Chengyi Li ◽

Qunwu Huang ◽

Yiping Wang

Keyword(s):

Thermal Behavior ◽

Solar Collector ◽

Solar Irradiation ◽

Cover Plate ◽

Brick Wall ◽

Absorber Plate ◽

Plate Temperature ◽

Glass Cover ◽

Color Coating ◽

The One

An important trend of Building Integrated Solar Thermal (BIST) system is to improve the aesthetic aspect of the solar collector to meet the requirement of architectural style and energy collection. Painting on the glass cover in an appropriate method is a simple and practical way. In this study, a halftone coating was used to print a red brick wall pattern on the glass cover. A series of comparative experiments were carried out to test the effect of the coating on the thermal behavior of the solar collector. In heat collection processes, compared with the solar collector with blank cover plate, the one with coated cover plate has lower absorber plate temperature and higher cover plate temperature. The lower the solar irradiance, the smaller the effect of color coating on the solar collector. Compared with the uncoated surface, the coated surface is more sensitive to solar irradiation. In the same heat collection process, compared with the solar collector coated on the outer surface of the cover plate, the one coated on the inner surface has 0.8 °C higher heat absorber plate temperature and 5% lower top heat loss.

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Analysis of a v-groove solar collector with a selective glass cover

Solar Energy ◽

10.1016/0038-092x(86)90015-0 ◽

1986 ◽

Vol 36 (6) ◽

pp. 509-519 ◽

Cited By ~ 10

Author(s):

R.M.S. Gama ◽

J.A.O. Pessanha ◽

J.A.R. Parise ◽

F.E.M. Saboya

Keyword(s):

Solar Collector ◽

Glass Cover

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ANALISIS PERBANDINGAN UNJUK KERJA PEMANAS AIR TENAGA SURYA TIPE PLAT DATAR DENGAN SISTEM SINGLE DAN DOUBLE CUTOFF

POROS ◽

10.24912/poros.v14i1.829 ◽

2017 ◽

Vol 14 (1) ◽

pp. 28

Author(s):

Ivan Budiman ◽

I Made Kartika ◽

Abrar Riza

Keyword(s):

Solar Energy ◽

Temperature Difference ◽

Solar Collector ◽

Warm Water ◽

The Sun ◽

Human Being ◽

Photothermal Conversion ◽

Glass Cover

Abstract: Warm water is needed by human being to take a bath, wash their clothes, their dishes etc. By the photothermal conversion, the solar energy can be used to heat the water. Flat solar collector is a tool which is used to capture energy of the sun radiation then convert it into heat to heat up water in collector’s pipes. The number of glass cover used effects the performance and efficiency of the collector. From this research, it is found that the efficiency of the collector is better when the cover used are two glasses than one glasses. The temperature difference of incoming and outgoing water in the collector using two glasses 15 ̊C higher than that of one glass.

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Non-gray calculation of plate solar collector with low iron glazing taking into account the absorption and emission with a glass cover

Desalination ◽

10.1016/j.desal.2007.04.025 ◽

2007 ◽

Vol 209 (1-3) ◽

pp. 156-162 ◽

Cited By ~ 9

Author(s):

M. Khoukhi ◽

S. Maruyama ◽

S. Sakai

Keyword(s):

Solar Collector ◽

Absorption And Emission ◽

Glass Cover

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Combined non-gray radiative and conductive heat transfer in solar collector glass cover

Solar Energy ◽

10.1016/j.solener.2003.08.027 ◽

2003 ◽

Vol 75 (4) ◽

pp. 285-293 ◽

Cited By ~ 16

Author(s):

Maatouk Khoukhi ◽

Shigenao Maruyama ◽

Seigo Sakai ◽

Masud Behnia

Keyword(s):

Heat Transfer ◽

Solar Collector ◽

Conductive Heat Transfer ◽

Conductive Heat ◽

Glass Cover

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Penggunaan Solar Collector Sebagai Pemanas Awal Air Masuk dan Pemanas Tambahan Bawah Heat Absorber Pada Basin Solar Still Untuk Meningkatkan Efisiensi

POROS TEKNIK ◽

10.31961/porosteknik.v8i2.369 ◽

1970 ◽

Vol 8 (2) ◽

pp. 68

Author(s):

M. Syafwansyah Effendi ◽

Ahmad Hendrawan ◽

Noor Rahman

Keyword(s):

Heat Exchanger ◽

Solar Radiation ◽

Solar Collector ◽

Water Environment ◽

Heat Energy ◽

Solar Still ◽

Glass Cover ◽

Additional Heating ◽

Heat Absorber ◽

Better Than

All basin solar still in general use under the askew glass cover as condensation media toplace the condensate flows toward the lower sections with use gravitation. It is known thatwhen condensation occurs release considerable heat energy to environment. Solve thisproblem, in this research is to minimize the loss of substantial energy, utilizing the heat fromthe solar collector. Heat is supplied to the bottom of the heat absorber and heat exchanger.Research methods is experiment. In this research is examine both the prototype, that is basinsolar still with solar collector and basin solar still without solar collector. The measuredparameter is temperature button section heat absorber, outside heat absorber, buttonsection of glass cover, condensate water, environment, solar collector, heat exchanger andsoar radiation.In this result temperature average at button section heat absorber is 47,03oC for prototypewith solar collector and without solar collector is 45,25oC. Solar radiation average is 304,11W/m2. Efficiency both prototype is 29,45% with solar collector and 19,86% without solarcollector. By comparing efficiency two prototype is concluded that the Solar Collector aspreheater water and additional heating of water under heat absorber 67.45% better than thatwithout using Solar Collector.

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