Condensing heat transfer coefficients of R134a in smooth and grooved multiport flat tubes of automotive heat exchanger: An experimental investigation

Ammar, Syed Muhammad; Abbas, Naseem; Abbas, Saleem; Ali, Hafız Muhammad; Hussain, Iftikhar; Janjua, Muhammad Mansoor; Sajjad, Uzair; Dahiya, Anurag

doi:10.1016/j.ijheatmasstransfer.2019.01.047

Cited by 34 publications

(8 citation statements)

References 26 publications

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“…When velocity was increasing, the heat flux caused by forced convection was increasing as well, complying with findings from existing studies [31][32][33]. the influence of supply velocity on melting ice.…”

Section: Convection Meltingsupporting

confidence: 89%

Experimental and numerical investigation of the performance of bogie chassis heater deicing systems

Liu

et al. 2020

Energy and Buildings

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Convection Meltingsupporting

confidence: 89%

Experimental and numerical investigation of the performance of bogie chassis heater deicing systems

Liu

et al. 2020

Energy and Buildings

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“…Utilizing nanoparticles becomes one of the most popular ways in many fields such as PV/T systems [34,35]. At the same time, it is used in the microchannel field to enhance the heat transfer coefficient and combat fouling [36][37][38][39][40][41][42][43][44][45][46][47]. This could be done through influence of the operating parameters inside the microchannels [48].…”

Section: Background and Introductionmentioning

confidence: 99%

An experimental study on microchannel heat sink via different manifold arrangements

et al. 2019

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The current experimental study performed the overall performance of the microchannel heat sink using the heat transfer coefficient, Nusselt number, and pressure drop for three novel manifold configurations. These selected manifolds have a rectangular (R), rectangle with semicircular (RSC) and divergent-convergent (DC) shapes for inlet and outlet. The heat transfer coefficient for all three types of microchannel was reported for the Reynolds number range of 342-857. The experiments were tested at four different heat inputs ranges between 50-125 W. R-type microchannel heat sink showed the worst performance, while the performance of DC-type microchannel heat sinks was the best. At Re of 342, the lowest Nusselt number was observed to be 2.8 at lower Reynolds number 342 for R-type manifold. RSC manifolds MCHS seems to be a better choice compared to R-type and DC-type MCHS with respect to pressure drop and Nusselt number. Compared to R-type microchannel heat sink, 24-32% and 7-10% augmentation in heat transfer coefficients were reported for DC-type and RSC-type microchannel heat sinks, respectively. Based on the released experimental results, it can be stated that DC-type microchannel heat sink is more beneficial in terms of heat transfer enhancement.

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“…The influence of magnetic characteristics of nanofluids created with an induced magnetic dipole is another intriguing subject under investigation. The impact of modifying viscosity on hydrodynamic nanofluid has also been explored numerically by many scholars [2], [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Plate-Type Heat Exchanger Performance by Employing Metallic Oxide Nanofluid

Jassim¹,

Ahmed²,

Jassim³

2022

International Conference on Fluid Flow, Heat and Mass Transfer

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Plate-type heat exchangers are characterized as compact and highly efficient type for their ability to operate at higher pressure in comparison to the conventional heat exchanger. Further enhancement of such type can be implemented by augmenting the thermal properties of the base fluid such as the thermal conductivity and the heat transfer convention coefficient. This could be achieved by adding additive in nano-sized to the fluid. The present research addresses the influence of utilizing Aluminium Oxide and Titanium oxide on the performance and energy interaction with the environment of plate-type heat exchanger. Different volume fractions of the abovementioned nanofluid are experimentally investigated to reveal the relation of the exchanger effectiveness with the concentration of the nanofluid. Effect of Reynolds number of nanofluid is also reported. The results confirm that existence of nanofluid does enhance the performance of the heat exchanger remarkably. The exchanger effectiveness also ameliorates with augmentation in VoF of nanoparticle. Analysis of the results ascertains that the exchanger performance shows better enhancement when Aluminium Oxide is employed in comparison to Titanium oxide, particularly at large Reynolds number. The outcome of the analysis reports that 13% increment in the exchanger effectiveness when 3% of TiO2 nanofluid is used. In return, using same amount of Al2O3 nanofluid upgrades the exchanger performance by 23%. For the system/environment energy interaction, the results shows that 3% of Aluminium oxides augments the heat leak factor by 40% when Re ~12000 while the increment in the leak factor approach 45% for the case of Titanium oxide. Increasing the nanofluid flowrates to Re = 14000 results in ameliorating in the heat interaction for both nanofluid, though TiO2 is barely touch 50%.

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Condensing heat transfer coefficients of R134a in smooth and grooved multiport flat tubes of automotive heat exchanger: An experimental investigation

Cited by 34 publications

References 26 publications

Experimental and numerical investigation of the performance of bogie chassis heater deicing systems

Experimental and numerical investigation of the performance of bogie chassis heater deicing systems

An experimental study on microchannel heat sink via different manifold arrangements

Improvement of Plate-Type Heat Exchanger Performance by Employing Metallic Oxide Nanofluid

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