The efficiency of linear Fresnel reflectors in producing superheated steam for power plant drive

Mokhtar Ghodbane,Boussad Boumeddane,Marek Majdak,M Rerak,M Majdak

doi:10.1051/e3sconf/202132300011

Mokhtar Ghodbane, Boussad Boumeddane + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/202132300011

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Abstract

Solar energy is one of the most important sources of renewable energies, which is widely used in many fields, such as electricity production through direct production of superheated steam based on Linear Fresnel Reflector. This study aims to show the optical and thermal behavior of linear Fresnel solar reflectors field directed to the electricity production in El-Oued region at Algeria. Four days of different weather data have been selected to track the change in solar field performance. Numerical optical modeling has shown that the optical performance of the solar field has reached 53.60 %, while the thermal study based on the numerical solution of the energy balance equations of the receiver tube proved that the thermal efficiency was 37.3 % and the average thermal loss coefficient was limited between 5.72 and 5.98 W/m²K. As for the superheated steam temperature, the lowest value was recorded in December with a value of 501 K. The results obtained are very compelling and encouraging to invest in this low-cost technology.

Highlights

The current global energy situation illustrates that most countries in the world are very dependent on fossil fuels to meet their needs [1]
Many studies have shown that using nanoparticles combined with a heat transfer fluid can improve the thermal performance of solar collectors of all kinds [10,11,12,13], Because dispersing nanoparticles in working fluids with certain concentrations will allow improving the phenomenon of heat transfer, and currently, several scientific research encourages the use of nanofluids in many industrial fields [14,15,16]
As for thermal efficiency “ηth”, it is related to the optical properties of linear Fresnel solar reflector components, related to heat loss around the receiver tube, and relates to the intercept coefficient “ ”

Summary

Introduction

The current global energy situation illustrates that most countries in the world are very dependent on fossil fuels (oil, gas, and coal) to meet their needs [1]. Hydrocarbons, the dominant energy source, cover 80% of global energy production At this speed of exploration and exploitation, the situation of hydrocarbon reserves is extremely worrying and their environmental impact is very alarming [2, 3]. Unlimited and abundant energy resources exist and must be exploited; The most important are solar energy, wind power, hydropower, geothermal energy, biomass energy, and new hydrogen energy [4, 5]. The exploitation of these clean and sustainable sources of energy will allow the solution to the energy problem in the world, and at the same time, it will permanently delete all the threats to the environment and human beings. Many studies have shown that using nanoparticles combined with a heat transfer fluid can improve the thermal performance of solar collectors of all kinds [10,11,12,13], Because dispersing nanoparticles in working fluids with certain concentrations will allow improving the phenomenon of heat transfer, and currently, several scientific research encourages the use of nanofluids in many industrial fields [14,15,16]

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