Passive performance enhancement of parabolic trough solar concentrators using internal radiation heat shields

El-Bakry, M. Medhat; Kassem, Mohamed A.; Hassan, Muhammed A.

doi:10.1016/j.renene.2020.11.003

Cited by 31 publications

(7 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…El-Bakry et al [37] examined the efficacy enhancement of PTSCs using radiation heat shields. The results found to be at small rates of fluid flow and high temperatures, the modified design is more efficient and maximum advances in energy and exergy efficacies are found to be 15.4 and 14.4%.…”

Section: Recent Modifications In the Receiver Tubesmentioning

confidence: 99%

Analyzing the performance of a parabolic trough solar collector with advanced techniques adopted in the absorber- a review

Bhattacharya,

Paradeshi,

Karthik

et al. 2024

Eng. Res. Express

View full text Add to dashboard Cite

In this paper, discussions have been made about parabolic trough collectors, their various components and modifications implemented in those systems. It has been seen in this study, that the implementation of design modifications to absorbers, the use of various heat transfer fluids, the use of a secondary reflector as well as the use of pin fins enhance the performance of these Collectors. Furthermore, explanations have been done on the various methods and tools such as the Monte Carlo Ray Tracing method implemented while developing these improvements to the existing system. During this study, it has been observed that varieties of twisted tubes have been used which is one such advancement toward a plane tube absorber. It has been observed that the implementation of changes in the receiver tubes can lead to a system having an efficiency of around 75.5% as compared to the systems with simple tubes while modifications to the reflectors enhance the optical efficiency of the collectors by 5%. It has also been observed that the application of Twisted Tubes enhances the performance by 9.2% more than plane tubes. It has also been found that the fluids used in the absorber tubes have been experimented with wherein nanofluids have been utilized thereby resulting in increased performance. It can be concluded that the maximum thermal achieved by the MWCNT nanofluid is 22% higher than the base fluid.

show abstract

Section: Recent Modifications In the Receiver Tubesmentioning

confidence: 99%

Analyzing the performance of a parabolic trough solar collector with advanced techniques adopted in the absorber- a review

Bhattacharya,

Paradeshi,

Karthik

et al. 2024

Eng. Res. Express

View full text Add to dashboard Cite

show abstract

“…The threedimensional numerical simulation model was performed in a Parabolic Trough Receiver (PTR) with molten salt as heat transfer fluid (HTF) using FLUENT software (Pina et al 2017). Utilizing Monte-Carlo ray tracing 3D CFD model; El-bakry et al, (El-bakry, Kassem, and Hassan 2021) presented maps of both energetic and exergetic performance of parabolic trough concentrators and the results exhibited energy and energy increased efficiency from 85.76 to 86.40 %, as the irradiance grew from 200 to 1000 W/m 2 . A three-dimensional model is constructed to simulate and evaluate the performance on a Parabolic Trough Receiver (PTR) with double tube and two HTF temperature distribution (P. .…”

Section: Introductionmentioning

confidence: 99%

Numerical Thermal Study of Heat Transfer Enhancement in Laminar-Turbulent Transition Flow Through Absorber Pipe of Parabolic Solar Trough Collector System

Ibrahim¹,

Kasem²

2022

Frontiers in Heat and Mass Transfer

View full text Add to dashboard Cite

“…They reported a remarkable decrease in the heat loss coefficient with the decrease in the PTC receiver diameter. El-Bakry et al 15 examined the effect of adding a radiation heat shield on the PTC efficiency. They found an enhancement in both the thermal and exergetic efficiencies of PTC.…”

Section: Introductionmentioning

confidence: 99%

Multiobjective design optimization of parabolic trough collectors

Kasem

2022

Sci Rep

View full text Add to dashboard Cite

Despite the large amount of research conducted on PTC performance analysis, few and rare numbers of research have considered the design optimization of PTCs. In the present work, a novel multiobjective-optimization model is developed for design optimization of PTCs. The objective functions are the thermal and exergetic efficiencies because they are the most important performance indicators (PIs) of PTCs. The design variables are the inlet temperature, and the outlet and inlet diameters of the PTC receiver tube. The PTC material volume (refers to the volume of the PTC receiver and collector) is kept constant throughout the optimization process to enhance the PTC performance without incurring additional cost (material). A parametric analysis is conducted before the optimization. The inlet-mass flow-rate effect is found to be negligible in contrast to the inlet temperature. Therefore, the latter is considered as a design parameter in the optimization process. Nine thermal fluids are used in the present optimization, which include pressurized water, Therminol, molten salt, liquid sodium, Syltherm, air, carbon dioxide, helium and hydrogen. The present optimization model is found to be efficient in maximizing both the thermal and exergetic efficiencies. Water achieves maximum optimal thermal efficiency, whereas helium achieves maximum optimal exergetic efficiency. Liquid sodium exhibits the best PI (60.725).

show abstract

Passive performance enhancement of parabolic trough solar concentrators using internal radiation heat shields

Cited by 31 publications

References 43 publications

Analyzing the performance of a parabolic trough solar collector with advanced techniques adopted in the absorber- a review

Analyzing the performance of a parabolic trough solar collector with advanced techniques adopted in the absorber- a review

Numerical Thermal Study of Heat Transfer Enhancement in Laminar-Turbulent Transition Flow Through Absorber Pipe of Parabolic Solar Trough Collector System

Multiobjective design optimization of parabolic trough collectors

Contact Info

Product

Resources

About