Efficiency, energy and economic analysis of twisted tape inserts in a thermosyphon solar flat plate collector with Cu nanofluids

Sundar, L. Syam; Misganaw, A.H.; Singh, Manoj K.; Péreira, A.; Sousa, António C.M.

doi:10.1016/j.ref.2020.06.004

Cited by 23 publications

(4 citation statements)

References 25 publications

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“…Also, despite the nanofluid, the thermal efficiency improved by 18% Sundar et al (Sundar et al 2020b ) 2020 Experimental Cu Twisted tape The outcomes displayed that the heat transfer coefficient went up by 46.90% compared to the simple collector with the insertion of a twisted tape. Also, the efficiency with water was reported to be 52% and increased to 58% despite the nanofluid Sundar et al (Sundar et al 2020a ) 2020 Experimental Al 2 O 3 Wire coil with core rod The collector level decreased to 39.33%, and the collector efficiency increased by 20% despite the nanofluid Munuswamy et al (Munuswamy et al 2020 ) 2020 Numerical Al 2 O 3 and CuO Fin The thermal efficiency increased by 7.2% with nanofluid and fin Khetib et al (Khetib et al 2022 ) 2022 Numerical Hybrid Nanofluid (DWCNTs-TiO 2 ) Turbulator According to the results, with the installation of the turbulator, the average Nusselt number increased to 63.46% Nabi et al (Nabi et al 2022 ) 2022 Numerical Hybrid nanofluids MWCNT and SWCNT-CuO Helical axial fins The heat transfer coefficient was 31.31% higher than the baseline due to the fin’s placement and increased by 8.79% despite the nanofluid Suthahar et al (Suthahar et al 2022 ) 2022 Numerical and experimental Hybrid nanofluid (DWCNTs-TiO 2 ) Twisted tape The average thermal efficiency with and without tape was 78.98% and 64.55%, respectively. In addition, the average thermal collector’s efficiency with nanofluid reached 84.85% …”

Section: Compoundmentioning

confidence: 99%

“…The water temperature at the flat plate solar collector outlet without nanofluid was 5–10 °C lower than when the nanofluid was used. Sundar et al (Sundar et al 2020a ) experimentally checked the energy performance, economic influence, and heat exchange aspects of solar flat plate collectors using aluminum oxide nanoparticles. Based on the reported outcomes, using nanofluid increased the collector’s efficiency by 20%.…”

Section: Flat Plate Solar Collectors With Nanofluidsmentioning

confidence: 99%

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Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Zaboli,

Saedodin,

Ajarostaghi

et al. 2023

Environ Sci Pollut Res

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This paper reviews the impacts of employing inserts, nanofluids, and their combinations on the thermal performance of flat plate solar collectors. The present work outlines the new studies on this specific kind of solar collector. In particular, the influential factors upon operation of flat plate solar collectors with nanofluids are investigated. These include the type of nanoparticle, kind of base fluid, volume fraction of nanoparticles, and thermal efficiency. According to the reports, most of the employed nanofluids in the flat plate solar collectors include Al2O3, CuO, and TiO2. Moreover, 62.34%, 16.88%, and 11.26% of the utilized nanofluids have volume fractions between 0 and 0.5%, 0.5 and 1%, and 1 and 2%, respectively. The twisted tape is the most widely employed of various inserts, with a share of about one-third. Furthermore, the highest achieved flat plate solar collectors’ thermal efficiency with turbulator is about 86.5%. The review is closed with a discussion about the recent analyses on the simultaneous use of nanofluids and various inserts in flat plate solar collectors. According to the review of works containing nanofluid and turbulator, it has been determined that the maximum efficiency of about 84.85% can be obtained from a flat plate solar collector. It has also been observed that very few works have been done on the combination of two methods of employing nanofluid and turbulator in the flat plate solar collector, and more detailed work can still be done, using more diverse nanofluids (both single and hybrid types) and turbulators with more efficient geometries.

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Section: Compoundmentioning

confidence: 99%

Section: Flat Plate Solar Collectors With Nanofluidsmentioning

confidence: 99%

Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Zaboli,

Saedodin,

Ajarostaghi

et al. 2023

Environ Sci Pollut Res

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“…The thermosiphon system is a type of SWHS that operates based on natural convection [64][65][66][67]. It utilizes the principle that when water in the collector is heated by the sun, it expands and becomes less dense.…”

Section: Thermosiphon Systemmentioning

confidence: 99%

Solar Water Heating: Comprehensive Review, Critical Analysis and Case Study

Herez

2023

Preprint

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The increasing global demand for renewable energy sources underscores the significance of Solar Water Heating Systems (SWHS), emphasizing the need for thorough research and analysis in this domain. SWHS play a pivotal role in addressing energy efficiency and environmental sustainability, making it imperative to conduct in-depth studies on their utilization. Hence, this paper aims to provide a comprehensive overview of SWHS. It starts by explaining the principles behind these systems, including their components and classification. Moreover, this review consolidates various studies that have been conducted on SWHS to highlight both their advantages and disadvantages. Additionally, a case study is conducted in which it takes into consideration important economic and environmental factors. In particular, it focuses on several scenarios present in Lebanon such as family homes, schools, restaurants hotels and gyms to estimate potential cost savings achieved through implementing SWHS as opposed to relying solely on electric heaters. Furthermore, this investigation also examines the corresponding payback period associated with adopting SWHS along with assessing the significant reduction in carbon dioxide emissions possible if these systems were widely implemented. The findings of the study demonstrate that there is a direct correlation between the extent to which SWHS are utilized and both the payback period and reduction in CO2 emissions. It was observed that when SWHS are used more frequently, with a high percentage of time (Pr=0.9), significant advantages can be achieved. For instance, for different types of establishments such as family homes, schools, restaurants, hotels, and gyms, it was estimated that average payback periods would be 14.2 years, 4.6 years, 9.2 years, 4.4 years, and 5.3 years, respectively. These results indicate that adopting a greater dependency on SWHSs not only leads to quicker cost recovery but also significantly contributes towards reducing carbon dioxide emissions. The analysis reveals that the yearly decrease in carbon dioxide emissions per individual is 0.16 t within a household, 0.016 t per student in an educational institution, 0.04 t per customer within a dining establishment, 0.37 t for each occupied bed in a hotel accommodation, and 0.11 t per individual at a gym. This paper serves as guidelines to SWH community. Additionally, it adds a practical insights into economic and environmental issues relevant to both Lebanon and countries with similar climates.

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“…Moreover, there are a few methods to calculate the collector efficiency, including static modeling [45][46][47], dynamic modeling [48][49][50], energy analysis [51][52][53], and exergy analysis [54][55][56].…”

Section: Glass Covermentioning

confidence: 99%

An Exhaustive Review on a Solar Still Coupled with a Flat Plate Collector

Ayoobi

Ramezanizadeh

2021

International Journal of Photoenergy

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In recent years, producing energy and potable water has become a contemporaneous issue in all areas, especially in rural and remote areas. It is due to the limitation of fossil fuels in generating energy and the daily increase of potable water topic pollution due to various development activities in the industries. Gradually, the use of renewable energies has been suggested as far as humans focus on using these energies in various activities, which is gratis and accessible in more areas without having negative anthropogenic hazards. Solar radiation has an important position in renewable energies and has played a significant role in the desalination process due to the convenience in applying and abundance in the areas with potable water shortages. However, one of the active solar stills is the coupling of conventional solar still with a flat plate collector. In this type, a flat plate collector is used to raise the temperature of saline water which increases the productivity. In this research, the solar still coupled with a flat plate collector is reviewed as the active solar still and the affecting parameters on its performance and efficiency are discussed. First, a summary of working research and their research of flat plate collectors is reviewed to be more familiar with flat plate collectors, their details, and technology. Then, solar still coupled with a flat plate collector is extensively reviewed and discussed in detail. Four types of studies on solar still coupled with a flat plate collector were done, including energy analysis, exergy analysis, economic analysis, and productivity evaluation.

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Efficiency, energy and economic analysis of twisted tape inserts in a thermosyphon solar flat plate collector with Cu nanofluids

Cited by 23 publications

References 25 publications

Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Recent progress on flat plate solar collectors equipped with nanofluid and turbulator: state of the art

Solar Water Heating: Comprehensive Review, Critical Analysis and Case Study

An Exhaustive Review on a Solar Still Coupled with a Flat Plate Collector

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