Experimental investigation of the effects of sonication time and volume concentration on the performance of PVT solar collector

Rajendiran, Gangadevi; Kuppusamy, Vinayagam Babu; Senthilraja, S.

doi:10.1049/iet-rpg.2018.5283

Cited by 9 publications

(3 citation statements)

References 33 publications

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“…The influence of sonication time (1-4 h) on the κ, µ, outlet temperature, electrical, and thermal efficiency of CuO/DW NFs (0.05-0.2 vol%) as coolants in a photovoltaic-thermal solar collector is studied [182]. The results reveal that an increase in the sonication time causes an increase in κ (3.5%), outlet temperature (>65 • C), thermal and electrical efficiency, and a decrease in µ, all as functions of volume concentration.…”

Section: Thermal Performance Of Heat Transfer Devicesmentioning

confidence: 99%

Influence of Preparation Characteristics on Stability, Properties, and Performance of Mono- and Hybrid Nanofluids: Current and Future Perspective

et al. 2023

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Nanofluids (NFs) synthesized via the suspension of diverse nanoparticles into conventional thermal fluids are known to exhibit better thermal, optical, tribological, and convective properties, photothermal conversion, and heat transfer performance in comparison with traditional thermal fluids. Stability is pivotal to NF preparation, properties, performance, and application. NF preparation is not as easy as it appears, but complex in that obtaining a stable NF comes with the harnessing of different preparation parameters. These parameters include stirring duration and speed, volume, density, base fluid type, weight/volume concentration, density, nano-size, type of mono or hybrid nanoparticles used, type and quantity of surfactant used, and sonication time, temperature, mode, frequency, and amplitude. The effect of these preparation parameters on the stability of mono and hybrid NFs consequently affects the thermal, optical, rheological, and convective properties, and photothermal conversion and heat transfer performances of NFs in various applications. A comprehensive overview of the influence of these preparation characteristics on the thermal, optical, rheological, and properties, photothermal conversion, and heat transfer performance is presented in this paper. This is imperative due to the extensive study on mono and hybrid NFs and their acceptance as advanced thermal fluids along with the critical importance of stability to their properties and performance. The various preparation, characterization, and stability methods deployed in NF studies have been compiled and discussed herein. In addition, the effect of the various preparation characteristics on the properties (thermal, optical, rheological, and convective), photothermal conversion, and heat transfer performances of mono and hybrid NFs have been reviewed. The need to achieve optimum stability of NFs by optimizing the preparation characteristics is observed to be critical to the obtained results for the properties, photothermal conversion, and heat transfer performance studies. As noticed that the preparation characteristics data are not detailed in most of the published works and thus making it mostly impossible to reproduce NF experimental studies, stability, and results; future research is expected to address this gap. In addition, the research community should be concerned about the aging and reusability of NFs (mono and hybrid) in the nearest future.

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Section: Thermal Performance Of Heat Transfer Devicesmentioning

confidence: 99%

Influence of Preparation Characteristics on Stability, Properties, and Performance of Mono- and Hybrid Nanofluids: Current and Future Perspective

et al. 2023

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“…The outer cylinder rotates, the inner one is stationary, and measurements of it are taken. Rajendiram et al [51] studied the effect of sonication on viscosity and thermal conduction. For viscosity, a cone-plate viscometer was used, which observed that the longer the exposure time, the lower the viscosity and the greater the thermal conductivity.…”

Section: Thermal Propertiesmentioning

confidence: 99%

Recent Developments on the Thermal Properties, Stability and Applications of Nanofluids in Machining, Solar Energy and Biomedicine

et al. 2022

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In this review work, the recent progress made in the use of nanofluids (NFs) applied in three specific areas will be presented: machining, solar energy, and biomedical engineering. Within this context, the discussions will be guided by emphasizing the thermal and stability properties of these fluids. In machining, NFs play a prominent role in the processes of turning, milling, drilling, and grinding, being responsible for their optimization as well as improving the useful life of the tools and reducing costs. In the solar energy field, NFs have been used in the thermal management of the panels, controlling and homogenizing the operating temperature of these systems. In the biomedical area, the advantages of using NFs come from the treatment of cancer cells, the development of vaccines before the improvement of diagnostic imaging, and many others. In all lines of research mentioned in this study, the main parameters that have limited or encouraged the use of these fluids are also identified and debated. Finally, the discussions presented in this review will inspire and guide researchers in developing new techniques to improve the applications of NFs in several fields.

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“…Globally, in 2023, the PV/T collector area reached 1.5 million m 2 , equivalent to a thermal capacity of 789 MW and an electrical capacity of 276 MWp [8]. This PV/T system, when integrated into buildings and used by the building for both electricity and thermal energy, is referred to as the BIPV/T system [9]. Due to being relatively new emerging systems worldwide, the use of BIPV and BIPV/T systems continues to increase annually.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of BIPV/T application in winter season under Şanlıurfa's meteorological conditions

Demir,

Aktacir

2024

IET Renewable Power Gen

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Considering that nearly 39% of the total CO2 emission released into the atmosphere today are thought to be due to the energy consumed by buildings, the importance of taking measures through buildings to combat global warming is evident. Therefore, the concept of nearly zero‐energy buildings (NZEB) is come to the forefront. Building integrated photovoltaic thermal (BIPV/T) systems are used to enable buildings to generate their own energy. However, buildings have limited facade and roof areas required for BIPV/T systems. Therefore, in this study, various configurations of bifacial (double‐sided) and monofacial (single‐sided) panels were compared to investigate ways to enhance the efficiency of BIPV/T systems. Different air flow velocities and varying air gap distances were tested for both panel types. By placing a reflective surface on the wall behind the bifacial panel, the electrical efficiency of the bifacial panel was increased and proven through PVsyst analysis. Both panels provided maximum heat efficiency at the shortest air gap distance under high air flow conditions. In addition, it was shown in both the experimental setup and Comsol CFD analysis that it provides significant benefit in the thermal energy load of the building when heating the interior environment in winter. In terms of electrical power production surplus, the bifacial panel outperformed the monofacial panel in all configurations, with a minimum advantage of 8.33% and a maximum of 12.73%. Additionally, the maximum electrical efficiency was obtained from the bifacial panel in configurations with the longest air gap distance. Using the bifacial panel in the BIPV/T system with the shortest air gap distance during the heating season and the longest air gap distance during other seasons can provide the highest efficiency for the building throughout the year.

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Experimental investigation of the effects of sonication time and volume concentration on the performance of PVT solar collector

Cited by 9 publications

References 33 publications

Influence of Preparation Characteristics on Stability, Properties, and Performance of Mono- and Hybrid Nanofluids: Current and Future Perspective

Influence of Preparation Characteristics on Stability, Properties, and Performance of Mono- and Hybrid Nanofluids: Current and Future Perspective

Recent Developments on the Thermal Properties, Stability and Applications of Nanofluids in Machining, Solar Energy and Biomedicine

Experimental investigation of BIPV/T application in winter season under Şanlıurfa's meteorological conditions

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