Effect of Shape on Thermophysical and Heat Transfer Properties of ZnO/R-134a Nanorefrigerant

Maheshwary, Prashant; Handa, C. C.; Nemade, K.R.

doi:10.1016/j.matpr.2017.11.257

Cited by 38 publications

(14 citation statements)

References 9 publications

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“…Some papers can be mentioned among the studies devoted to the investigation of the nanorefrigerants thermophysical properties [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…There are papers dedicated to investigating the influence of not only concentration but also the nanoparticles material and shape [9] and nanoparticles size on the nanorefrigerants thermophysical properties. The detailed review of performed studies of nanorefrigerant thermophysical properties is presented in [11].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…The detailed review of performed studies of nanorefrigerant thermophysical properties is presented in [11]. But the analysis of the information presented in [9][10][11] did not allow us to draw a conclusion about the influence of the considered characteristics on thermophysical properties of nanofluids.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Performed in the past two decades studies have shown that the addition of small amounts of nanoparticles can significantly change the thermophysical properties of the base fluid [1][2][3][4][5][6][7][8][9][10]. The application of nanofluids as coolants and working fluids in thermal power systems (including refrigeration) can contribute to the intensification of heat transfer processes in various heat exchangers [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Experimental study of the effect of nanoparticles of ТiO2 on the thermophysical properties of the refrigerant R141b

Khliyeva¹,

Lukianova²,

Semenyuk³

et al. 2018

EEJET

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Наведено результати експериментального дослiдження теплофiзичних властивостей холодоагенту R141b, розчину R141b/поверхнево-активна речовина (ПАР) Span-80 i нанофлюїду R141b/Span-80/наночастинки TiO 2 . Вмiст як ПАР, так i наночастинок TiO 2 у об'єктах дослiдження складав 0,1 мас. %. Вимiри проведено на лiнiї кипiння в iнтервалах температур (273...293) K для густини, (293...343) K для поверхневого натягу, (300...335) K для динамiчної в'язкостi, (293...348) K для теплопровiдностi, (261...334) K для iзобарної теплоємностi. Показано, що вплив ПАР та наночастинок TiO 2 на густину холодоагенту R141b був незначним i сумiрним iз невизначенiстю експериментальних даних (до 0,08 %). Добавки сумiсно ПАР та наночастинок TiO 2 сприяли зниженню поверхневого натягу R141b на величину до 0,3 % у порiвняннi з чистим R141b. Добавки сумiсно ПАР та наночастинок TiO 2 в R141b сприяли збiльшенню в'язкостi на (0,8...1,0 холодоагенту (0,3...1) %. Було зафiксовано зниження на (1,5...2,0 (до 1,0 %). ) %, а добавки ПАР призводилили до суттєвого зниження в'язкостi -на (3,5...5,0) % у порiвняннi з в'язкiстю чистого R141b. Показано, що добавки ПАР в R141b суттєво не впливають на теплопровiднiсть (ефект не перевищував 0,25 %), а добавки сумiсно ПАР та наночастинок TiO 2 призводять до збiльшення теплопровiдностi ) % питомої iзобарної теплоємностi при введеннi у R141b сумiсно ПАР та наночастинок TiO 2 та незначне збiльшення теплоємностi при додаваннi ПАР Зроблено висновок, що вплив добавок наночастинок та ПАР на теплофiзичнi властивостi холодоагенту R141b є неоднозначним та непрогнозованим. Результати експериментальних дослiджень впливу наночастинок на теплофiзичнi властивостi холодоагенту пiдтверджують необхiднiсть розробки методiв моделювання цих властивостей на основi урахування наявностi на поверхнi наночастинок структурованої фази базової рiдини або ПАР.Ключовi слова: холодоагент R141b, нанофлюїд R141b/ наночастинкиTiO 2 , густина, поверхневий натяг, питома iзобарна теплоємнiсть, теплопровiднiсть, в'язкiсть UDC 621.564.2:[536.22+536.632+538.953+538.93] 34 ing the nanofluids thermophysical properties and for the modeling of heat transfer processes.

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“…Some papers can be mentioned among the studies devoted to the investigation of the nanorefrigerants thermophysical properties [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental study of the effect of nanoparticles of ТiO2 on the thermophysical properties of the refrigerant R141b

Khliyeva¹,

Lukianova²,

Semenyuk³

et al. 2018

EEJET

View full text Add to dashboard Cite

show abstract

“…The nanofluid has important application areas, such as car radiator coolant, [1][2][3] cooling applications in electronic systems, [4][5][6] effective extraction of solar energy, [7][8][9] and refrigeration devices. 10,11 Nanofluids are beneficial in a variety of applications besides thermal purposes. Nanoparticles are used in biomedical applications of biogenic for anticancer and drug delivery, antibacterial activities, and bioimaging and disease diagnosis.…”

Section: Introductionmentioning

confidence: 99%

Toward the thermohydrodynamic behavior of a nanofluid containing C‐MWCNTs flowing through a 3D annulus channel under constant imposed heat flux

2021

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The heat transport and friction factor in a three‐dimensional horizontal concentric annular duct filled with nanofluids comprising clove‐treated multiwalled carbon nanotubes are investigated numerically in this paper. The cylinder's outer surface is thermally insulated, while uniform heat flux is imposed on the cylinder's inner surface. The problem is formulated in dimensionless cylindrical coordinates. The numerical solutions were obtained based on the finite volume technique with second‐order precision, and cover a range of the Reynolds number 1000 ≤ Re ≤ 2000 and nanoparticle weight fractions 0.075, 0.125, and 0.175 wt%. To describe the results for both heat exchange and fluid flow performance, the temperature profile, Nusselt number, heat transfer coefficient, and friction factor are represented. The findings state that heat transport increases as Reynolds is increased and nanoparticles are introduced. The friction factor was also observed to improve as the concentration of nanoparticles increased. In addition, two new Nusselt number and friction factor correlations were established.

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Review on emission reduction of VCR system using various nano‐refrigerants

Purusothaman,

Venkatesh,

Jotheeswaran

et al. 2023

Environmental Quality Mgmt

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The focus of the study is the exploration of the possible efficacy and environmental advantages of nanofluids, including hybrid nanoparticles, concerning the effectiveness of the Vapor Compression Refrigeration System (VCRS). This necessitates a thorough assessment of the stability qualities, synthesis techniques, thermal conductivity, viscosity, and heat transfer efficiency of nanofluids. This research also aims to explore different Nano‐Refrigerant combinations that influence the Coefficient of Performance (COP). According to some research findings, the use of copper nanoparticles improved COP by 8.1%, while the use of alumina nanoparticles raised COP values as high as 6.71%. Moreover, studies have demonstrated that various hybrid nanoparticles like silver‐graphene oxide also greatly improve outcomes concerning amounts used, raising the system's overall performance capabilities. Finally, it can be said that there is a wide range of applications for these fluids because they can function cost‐effectively and environmentally friendly while significantly reducing energy consumption, acting as refrigerants or secondary fluid systems, and having a positive impact on performance when used in deployed VCRS configurations.

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Effect of Shape on Thermophysical and Heat Transfer Properties of ZnO/R-134a Nanorefrigerant

Cited by 38 publications

References 9 publications

Experimental study of the effect of nanoparticles of ТiO2 on the thermophysical properties of the refrigerant R141b

Experimental study of the effect of nanoparticles of ТiO2 on the thermophysical properties of the refrigerant R141b

Toward the thermohydrodynamic behavior of a nanofluid containing C‐MWCNTs flowing through a 3D annulus channel under constant imposed heat flux

Review on emission reduction of VCR system using various nano‐refrigerants

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