A linear Fresnel reflector as a solar system for heating water: Theoretical and experimental study

Ghodbane, Mokhtar; Boumeddane, Boussad; Settou, Noureddine

doi:10.1016/j.csite.2016.06.006

Cited by 72 publications

(21 citation statements)

References 18 publications

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“…Mokhtar et al developed a mathematical model for the estimation of the thermal efficiency of a small-scale LFC, assuming that the optical efficiencies of the collector are a function of declination angle and sun altitude. 19 Sahoo et al used the commercial software RELAP for the thermal hydraulic modeling and simulation of an LFC, concentrating on the trapezoidal cavity of the receiver. 20 They focused on the optimization of the cavity depth and rock wool insulation thickness based on the simulation of the overall heat transfer coefficient for different operation conditions.…”

Section: Discussionmentioning

confidence: 99%

Optical performance and instantaneous efficiency calculation of linear Fresnel solar collectors

2017

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Summary The main objective of this study is the investigation of the effect of the optical path of incident beam solar radiation on the performance of a linear Fresnel concentrating solar collector. The requirements regarding the kinematics of the reflectors are examined, allowing the effective focus of the reflected radiation on the receiver cover. A methodology for the calculation of the reflection angles of the sun rays incident on the mirrors, as well as of the incidence angles of the reflected rays on the cover, as a function of the sun position and the geometry of the collector is proposed. Specific scenarios, describing the effect of the solar radiation optical path on the collected heat, are formulated, each of them leading to a different form for the instantaneous efficiency equation. The evaluation and analysis of these scenarios, on the basis of actual operation conditions, has shown that the effect of the reflection and incidence angles throughout the modeling of the collector and the calculation of the useful thermal power cannot be neglected.

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Section: Discussionmentioning

confidence: 99%

Optical performance and instantaneous efficiency calculation of linear Fresnel solar collectors

2017

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“…Solar energy is the most important source of renewable energy, where it can be exploited thermally and photovoltaically by using multiple solar collectors [4], Knowing that, the performance of solar collectors can be improved by dispersing nanoparticles within the working fluid [5][6][7][8][9], because the dispersed nanoparticles inside the working fluid improve the thermal transfer coefficients of the base fluid [10]. There are several techniques for using solar energy thermally, the most important of which is the use of thermodynamic systems with solar concentrators that are considered the most important in the world [9,[11][12][13][14], as these systems generate solar energy using mirrors or lenses to focus a large amount of beam radiation on a small area in order to exploit the heat flux intensity later in several industrial applications such as electricity production [14,15], heating water [8, [16][17][18][19], water desalination and purification [6], cooling and air conditioning systems [20,21], industrial uses [22][23][24] and agricultural applications [25]. For example, solar electricity is generated when the concentrated solar radiation is converted into heat [26], which drives a steam turbine connected to an electric power generator or a thermochemical reaction [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Brief on Solar Concentrators: Differences and Applications

Ghodbane¹,

Benmenine²,

Khechekhouche³

et al. 2020

I2M

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In light of the global crises that the world suffers from, the renewable energy exploitation is a viable solution to remedy the various energy crises, knowing that renewable energy is a source of environmental credibility, as it does not cause any pollution or any emissions harmful to the environment. Among the most important renewable energy sources, solar energy is the most important type as it can be exploited thermally by adopting various solar collectors, especially solar concentrators. This paper has been devoted to illustrate the types of solar concentrators, namely point-focus concentrators (Heliostat Field Collectors and Parabolic Dish Collectors) and linear concentrators (Linear Fresnel Reflectors and Parabolic Trough Collectors), in an attempt to clarify its principle and its multiple uses domestically and industrially, especially in areas that are characterized by the abundance of its direct solar radiation. The solar concentrator is a solar thermal energy concentration system, because its use reduces the consumption of fossil fuels harmful to the environment and directly contributes to climate change. Solar thermal concentrators are an effective alternative to fossil generators for thermal energy, as they have many important uses such as the solar electricity production of solar electricity in power plants, industrial and domestic water heating, and have many other industrial uses.

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“…h F is the coefficient of heat exchange by convection; it is often given by the relation follows [17]:…”

Section: Thermal Studymentioning

confidence: 99%

“…The heat flow transmitted to the fluid (the power gained to the collector "q u (W)") is given by the following relationship [16,17]:…”

Section: Thermal Studymentioning

confidence: 99%

A numerical analysis of the energy behavior of a parabolic trough concentrator

Ghodbane¹,

Boumeddane²

2018

J. Fundam and Appl Sci.

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The solar power is a clean and a durable energy; there are several techniques for using them.When necessary to elevated temperatures of heat transfer fluid, this energy must concentration. This paper presents the efficiencies study of a linear solar concentrator of a parabolic trough type. This study was conducted on the device in Guemar area, this region is located in the state of El-Oued, which it is found in the south-east of Algeria. Six typical days were selected to conduct the study in them. The solar collector has been studied optically and thermally. The optical study was using SolTrace. Matlab was used as device of programmation to solve the non-linear system of mathematical equations. The method of finite differences in the implicit case was used as way of solution. The thermal efficiencies of the concentrator are very acceptable, it have exceeded 82 %.

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A linear Fresnel reflector as a solar system for heating water: Theoretical and experimental study

Cited by 72 publications

References 18 publications

Optical performance and instantaneous efficiency calculation of linear Fresnel solar collectors

Optical performance and instantaneous efficiency calculation of linear Fresnel solar collectors

Brief on Solar Concentrators: Differences and Applications

A numerical analysis of the energy behavior of a parabolic trough concentrator

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