Evaluation of Different Glazing Materials, Strategies, and Configurations in Flat Plate Collectors Using Glass and Acrylic Covers: An Experimental Assessment

Ameri, Mehran; Farzan, Hadi; Nobari, M.

doi:10.5829/ijee.2021.12.04.03

Cited by 13 publications

(6 citation statements)

References 29 publications

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“…Acrylic glass is less expensive, simple to machine, lightweight, optically clear, UV resistant, and maintains its stability under a variety of environmental conditions, including heat, cold, and humidity. It is not as brittle as glass at room temperature, although the two materials become comparable at temperature below -50 • C. Its Achilles heel, however, is represented by the sudden decay of mechanical properties at temperatures slightly above 100 • C. This material is commonly used for architectural glazing [5,37], solar thermal collectors [7], show boxes, light lenses, aquariums, terrariums, and greenhouse panels. Its use in space windows is recent and not well documented in the technical literature.…”

Section: Introductionmentioning

confidence: 99%

Energy absorption through radiation in multilayer windows for spacecrafts

GALUPPI,

ROYER-CARFAGNI

2024

Preprint

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The overall heating of satellites operating in low orbit, essentially due to direct radiation from the sun and terrestrial albedo, and the planetary radiation, is well studied, but little is found specifically on transparent plates used for windowing spacecrafts. The most historic material of choice is fused silica, as in the cupola of the International Space Station; more recently, acrylic glass is being used, but its refractive properties are poorly documented. Starting from Maxwell’s laws, the effects of electromagnetic waves incident on multilayer windows composed of panes of fused silica or acrylic glass, or a composition of these, are analyzed. Using data of refractive index from the literature, which however are incomplete and sometimes contradictory, the problem is addressed by distinguishing the frequency of the radiation, because this affects the transmissibility and absorption of each material; moreover, the frequency content of the radiation of the solar and terrestrial albedo is different from that of the planet. Worked examples show that fused silica allows most radiation to pass directly through; absorption occurs in such a thin surface layer that it can be modeled as a boundary condition. Acrylic glass, on the other hand, is characterized by absorption depending on the thickness; this can potentially increase its temperature, posing a problem since the mechanical properties decay at temperatures above 100 °C. This study represents a key step to analyze the thermal problem for space windows, of considerable interest since glazing can fail due to thermal shocks, constrained thermal variations, or temperature concentrations.

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Section: Introductionmentioning

confidence: 99%

Energy absorption through radiation in multilayer windows for spacecrafts

GALUPPI,

ROYER-CARFAGNI

2024

Preprint

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“…Using solar energy to supply hot water to homes and industrial centers is one of the most practical and cost-effective ways to use renewable energy in the world today [14]. For this reason, most developed and developing countries are investing heavily in the use of solar systems and clean energy [15]. The largest manufacturers of heating collectors are China, the USA, Japan, and Turkey, respectively [16].…”

Section: Introductionmentioning

confidence: 99%

One-year Dynamic Study of the Use of Solar Water Heater for Domestic Consumption in Egypt: An Energy Assessment

Haghani

Jahangiri

Riahi

et al. 2023

IJEE

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“…Thus, they found that the coating strategy improved the thermal efficiency by 22.74% and 44% in 2 air mass flow rates. Ameri et al [15] were also interested in a current experimental study of different coverage strategies to construct two models of solar air heaters (SAHs), with one acrylic cover, one glass cover, and a double glass cover. Therefore, they concluded during the experimental operation that the double-covered SAH is higher and improves the resistance to solar radiation, in contrast to the acrylic panel, which is resistant to harsh ambient conditions only.…”

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confidence: 99%