The gap angle as a design criterion to determine the position of linear Fresnel primary mirrors

Santos, André Vitor de Albuquerque; Canavarro, Diogo; Collares-Pereira, Manuel

doi:10.1016/j.renene.2020.09.017

Cited by 5 publications

(2 citation statements)

References 26 publications

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“…where τ(θ) is the transmittance at angle θ and τ(0) is the transmittance normal to the sun. τ(θ) and τ(0) are given by Equations ( 6) and (7), respectively [47].…”

Section: Incidence Angle Modifier (Iam) Lossesmentioning

confidence: 99%

Why Does the PV Solar Power Plant Operate Ineffectively?

Alhmoud

2023

Energies

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Quality, reliability, and durability are the key features of photovoltaic (PV) solar system design, production, and operation. They are considered when manufacturing every cell and designing the entire system. Achieving these key features ensures that the PV solar system performs satisfactorily and offers years of trouble-free operation, even in adverse conditions. In each cell, the quality of the raw material should meet the quality standards. The fulfillment of the quality management system requires every part that goes into the PV solar system to undergo extensive testing in laboratories and environments to ensure it meets expectations. Hence, every MWh of electricity generated by the PV solar system is counted, the losses should be examined, and the PV system’s returns should be maximized. There are many types of losses in the PV solar system; these losses are identified and quantified based on knowledge and experience. They can be classified into two major blocks: optical and electrical losses. The optical losses include, but are not limited to, partial shading losses, far shading losses, near shading losses, incident angle modifier (IAM) losses, soiling losses, potential induced degradation (PID) losses, temperature losses, light-induced degradation (LID) losses, PV yearly degradation losses, array mismatch losses, and module quality losses. In addition, there are cable losses inside the PV solar power system, inverter losses, transformer losses, and transmission line losses. Thus, this work reviews the losses in the PV solar system in general and the 103 MWp grid-tied Al Quweira PV power plant/Aqaba, mainly using PVsyst software. The annual performance ratio (PR) is 79.5%, and the efficiency (η) under standard test conditions (STC) is 16.49%. The normalized production is 4.64 kWh/kWp/day, the array loss is 1.69 kWh/kWp/day, and the system loss is 0.18 kWh/kWp/day. Understanding factors that impact the PV system production losses is the key to obtaining an accurate production estimation. It enhances the annual energy and yield generated from the power plant. This review benefits investors, energy professionals, manufacturers, installers, and project developers by allowing them to maximize energy generation from PV solar systems and increase the number of solar irradiation incidents on PV modules.

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“…where τ(θ) is the transmittance at angle θ and τ(0) is the transmittance normal to the sun. τ(θ) and τ(0) are given by Equations ( 6) and (7), respectively [47].…”

Section: Incidence Angle Modifier (Iam) Lossesmentioning

confidence: 99%

Why Does the PV Solar Power Plant Operate Ineffectively?

Alhmoud

2023

Energies

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“…An approach to determine the dimensions optimal diof flat mirrors was proposed based on the size of the receiver (27)(28)(29)(30)(31)(32). Santos et al (33) proposed a method to increase the amount of concentrated energy by increasing the number of primary concentrators (mirrors). In their research, the characteristics of the mirrors were the same in all the simulations, but with increasing the number of mirrors (total mirror area), the filling factor increased, which resulted in more energy concentration.…”

Section: Introductionmentioning

confidence: 99%

Optical Efficiency of Linear Fresnel Reflectors in Fixed, Variable and Optimal Distance between Mirrors: Theoretical and Experimental Studies

Nakhaei Zadeh,

Ameri,

Shojaei

et al. 2024

IJE

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In linear Fresnel reflectors, field arrangement has a significant effect on optical efficiency. Three constant, optimal, and variable distance layouts are proposed for Fresdemo solar power plant. The study was carried out by simulation and experiment. The small-scale Fresnel concentrator was designed and built with the capability to implement these three arrangements. The optical efficiency of the solar power plant with optimal variable and constant gap between mirrors were compared, considering fixed conditions for all layouts, including overall dimensions of the plant, width, and number of mirrors and dimensions of the receiver. It was observed that the arrangement with the optimal variable, and fixed distance had the highest to the lowest energy efficiency. Besides, the mirrors farther from the center entail more losses due to the sharper tilt angles, hence more spaces between these mirrors is required to reduce the losses. Meanwhile, the last mirrors in fixed distance arrangement have severe losses of shading and blocking while, they produce almost the same energy as central mirrors in the optimal and variable distance arrangement. The experimental results of the developed prototype showed that the thermal efficiency for the optimal distance was the highest, while it was followed closely by variable distance arrangement. The fixed distance arrangement had the lowest thermal efficiency. In addition, the variable and optimal distance arrangements exhibited an efficiency of 54% and 55%, respectively.

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Solar collector with asymmetric compound parabolic concentrator for winter energy harvesting and summer overheating reduction: Concept and prototype device

Chen

Yang

2021

Renewable Energy

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The gap angle as a design criterion to determine the position of linear Fresnel primary mirrors

Cited by 5 publications

References 26 publications

Why Does the PV Solar Power Plant Operate Ineffectively?

Why Does the PV Solar Power Plant Operate Ineffectively?

Optical Efficiency of Linear Fresnel Reflectors in Fixed, Variable and Optimal Distance between Mirrors: Theoretical and Experimental Studies

Solar collector with asymmetric compound parabolic concentrator for winter energy harvesting and summer overheating reduction: Concept and prototype device

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