Structure parameters and designs and their impact on performance of different heat exchangers: A review

Hussein, Hind Azeez mohammed; Zulkifli, Rozli; Mahmood, Wan Mohd Faizal Bin Wan; Ajeel, Raheem K.

doi:10.1016/j.rser.2021.111842

Cited by 35 publications

(8 citation statements)

References 257 publications

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“…However, its heat exchange capability is limited. It is suitable for applications requiring a lower pressure drop or systems with unique requirements [72].…”

Section: Straight Channelmentioning

confidence: 99%

Research Advances in the Application of the Supercritical CO2 Brayton Cycle to Reactor Systems: A Review

Xiao,

Zhou,

Yuan

et al. 2023

Energies

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Amid the global emphasis on efficient power conversion systems under the “dual carbon” policy framework, the supercritical CO2 (SCO2) Brayton cycle is a noteworthy subject, owing to its pronounced efficiency, compact design, economic viability, and remarkable potential to increase the thermal cycle efficiency of nuclear reactors. However, its application across various nuclear reactor loops presents divergent challenges, complicating system design and analytical processes. This paper offers a thorough insight into the latest research on the SCO2 Brayton cycle, particularly emphasising its integration within directly and indirectly cooled nuclear reactors. The evolution of the Brayton cycle in nuclear reactor systems has been meticulously explored, focusing on its structural dynamics, key components, and inherent pros and cons associated with distinct reactor loops. Based on the theoretical frameworks and empirical findings related to turbomachinery and heat exchangers within the cycle, we chart a course for future enquiries into its critical components, underscoring the indispensable role of experimental investigations. This paper conclusively assesses the feasibility of deploying the SCO2 Brayton cycle in direct and indirect cooling contexts, offering a forward-looking perspective on its developmental trajectory. The SCO2 Brayton cycle may become a focal point for research, potentially creating avenues for nuclear energy endeavours.

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“…However, its heat exchange capability is limited. It is suitable for applications requiring a lower pressure drop or systems with unique requirements [72].…”

Section: Straight Channelmentioning

confidence: 99%

Research Advances in the Application of the Supercritical CO2 Brayton Cycle to Reactor Systems: A Review

Xiao,

Zhou,

Yuan

et al. 2023

Energies

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“…As shown in Equation (11), T l , T e , and T m indicate the velocity, pressure, and temperature, respectively. lϑP jm indicates the stands for density; ρ denotes the thermal conductivity; and M T indicates the specific heat capacity.…”

Section: Evaluation Of the Mean Flow's Governing Equationsmentioning

confidence: 99%

“…Thermal water heaters are an integral component of human existence and are used for a wide range of functions in residence [10]. There are three main applications for Indian high-temperature water: local, Energies 2023, 16, 295 2 of 18 industrial, and modern [11]. For drying and cleaning, it can be found in chairs at resorts and hotel rooms [12].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Computational Analysis of Aluminum-Coated Dimple and Plain Tubes in Solar Water Heater System

et al. 2022

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Solar power is often regarded as one of the most promising forms of alternative energy since it is both sustainable and renewable. It is difficult to utilize and benefit from solar energy in residential and industrial applications because of the intermittent nature of its supply. A solar-based water heating system is efficient for using solar thermal conversion, the simplest and most successful method of turning solar energy into thermal energy. In this research, the performance analysis of Parabolic Trough Solar Collectors (PTSCs) with aluminum-coated copper dimple tubes was computationally and experimentally analyzed. For computational analysis, a Computational Fluid Dynamics (CFD) tool was used. For experimental analysis, aluminum-coated dimple tubes were used to pass the base fluid (water) in it while varying the mass flow rate from 1.0 to 3.0 kg/min at steps of 0.5 kg/min to examine the effect of dimple texturing and aluminum coating on the performance of the solar water heater. The parameters, such as thermal efficiency, friction factor, convective heat transfer coefficient, Nusselt number, and effectiveness of the PTSC, were analyzed, and we found remarkable improvement towards high conversion efficiency. At a flow rate of 2.5 kg/min, the thermal efficiency was improved by about 36%, the friction factor increased by about 0.32%, the convective heat transfer coefficient was improved by 1150 W/m2K, Nusselt number was improved by about 53.8 and the effectiveness was enhanced by 0.4. The simulation results were compared with the experimental results, and the deviation was about ±3.8%, which may be due to an error in the instrument as well as environmental conditions during the analysis. The outcome of results can be used for real-life applications in industrial water heating and domestic water heating especially, the places exposed to low solar radiation intensity throughout the year.

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“…To improve the internal heat transfer efficiency of the collector, various enhanced heat transfer techniques have been tried. As a passive heat transfer technology, vortex generator has been widely used to improve the heat transfer efficiency of heat exchangers [1][2].…”

Section: Introductionmentioning

confidence: 99%

Study on heat transfer characteristics of parabolic trough collector enhanced by vortex generator

Zhao,

Zhang,

Zhan

2024

Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023)

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Parabolic trough collector is a widely used solar collector. The flow field and heat transfer characteristics of the perforated vortex generator with periodically staggered arrangement in the rectangular absorber are simulated for Re=10000~50000. TiO2-Cu / water nanofluid is used as the heat transfer fluid. The effects of blocking ratio (h H ⁄ =0.7) and perforation diameter 𝑑 on the heat transfer and flow resistance in the channel are analyzed. The results show that the perforated baffle with h H ⁄ =0.7, d=2.5has the best comprehensive performance of heat transfer in the channel for all selected Re.

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Structure parameters and designs and their impact on performance of different heat exchangers: A review

Cited by 35 publications

References 257 publications

Research Advances in the Application of the Supercritical CO2 Brayton Cycle to Reactor Systems: A Review

Research Advances in the Application of the Supercritical CO2 Brayton Cycle to Reactor Systems: A Review

Experimental and Computational Analysis of Aluminum-Coated Dimple and Plain Tubes in Solar Water Heater System

Study on heat transfer characteristics of parabolic trough collector enhanced by vortex generator

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