Study of Increase in Temperature of Solar Modules Using Hot Mirror
01 Jan 2020-pp 117-122
TL;DR: In this article, a theoretical simulation and an experimental validation on the adverse effect of the increase in the temperature of the solar cell for visible and infra-red (IR) radiation have been done.
Abstract: The output of a solar cell is highly dependent on the thermal parameters. In this abstract, a theoretical simulation and an experimental validation on the adverse effect of the increase in the temperature of the solar cell for visible and infra-red (IR) radiation have been done. It has also been shown that this problem can be characterized quite effectively with use of a hot-mirror. The experimental study has been done repeatedly and similar results have been obtained. The experiment has been done with both tungsten lamp and sunlight.
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TL;DR: In this paper, a brief discussion is presented regarding the operating temperature of one-sun commercial grade silicon-based solar cells/modules and its effect upon the electrical performance of photovoltaic installations.
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TL;DR: In this paper, an analytical solution for the rapid extraction of single and double-diode model parameters from experimental data is described. And the resulting parameters' values' values are shown to have less than 10 percent error for most solar cells.
Abstract: Analytical solutions for the rapid extraction of single- and double-diode model parameters from experimental data are described. The resulting parameters' values are shown to have less than 10 percent error for most solar cells. Error contours are also illustrated to define the range of validity of these methods.
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TL;DR: This work experimentally demonstrates a visibly transparent thermal blackbody, based on a silica photonic crystal, that can cool structures by thermal radiation to outer space, while preserving the structures’ solar absorption.
Abstract: A solar absorber, under the sun, is heated up by sunlight. In many applications, including solar cells and outdoor structures, the absorption of sunlight is intrinsic for either operational or aesthetic considerations, but the resulting heating is undesirable. Because a solar absorber by necessity faces the sky, it also naturally has radiative access to the coldness of the universe. Therefore, in these applications it would be very attractive to directly use the sky as a heat sink while preserving solar absorption properties. Here we experimentally demonstrate a visibly transparent thermal blackbody, based on a silica photonic crystal. When placed on a silicon absorber under sunlight, such a blackbody preserves or even slightly enhances sunlight absorption, but reduces the temperature of the underlying silicon absorber by as much as 13 °C due to radiative cooling. Our work shows that the concept of radiative cooling can be used in combination with the utilization of sunlight, enabling new technological capabilities.
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TL;DR: In this paper, the temperature dependence of a general solar cell is investigated on the basis of internal device physics, producing general results for the temperature dependent of open-circuit voltage and shortcircuit current, as well as recommendations for generic modelling.
Abstract: Solar cell performance generally decreases with increasing temperature, fundamentally owing to increased internal carrier recombination rates, caused by increased carrier concentrations. The temperature dependence of a general solar cell is investigated on the basis of internal device physics, producing general results for the temperature dependence of open-circuit voltage and short-circuit current, as well as recommendations for generic modelling. Copyright © 2003 John Wiley & Sons, Ltd.
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TL;DR: Key information suggesting that IR-A may be more beneficial than deleterious when the skin is exposed to the appropriate irradiance/dose ofIR-A radiation similar to daily sun exposure received by people in real life are focused on.
Abstract: In the last decade, it has been proposed that the sun's IR-A wavelengths might be deleterious to human skin and that sunscreens, in addition to their desired effect to protect against UV-B and UV-A, should also protect against IR-A (and perhaps even visible light). Several studies showed that NIR may damage skin collagen content via an increase inMMP-1 activity in the same manner as is known for UVR. Unfortunately, the artificial NIR light sources used in such studies were not representative of the solar irradiance. Yet, little has been said about the other side of the coin. This article will focus on key information suggesting that IR-A may be more beneficial than deleterious when the skin is exposed to the appropriate irradiance/dose of IR-A radiation similar to daily sun exposure received by people in real life.IR-A might even precondition the skin--a process called photo prevention--from an evolutionary standpoint since exposure to early morning IR-A wavelengths in sunlight may ready the skin for the coming mid-day deleterious UVR. Consequently IR-A appears to be the solution, not the problem. It does more good than bad for the skin. It is essentially a question of intensity and how we can learn from the sun. © 2016 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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