Effect of temperature and CuO-nanoparticle concentration on the thermal conductivity and viscosity of an organic phase-change material

B. Águila V, D.A. Vasco, P. Galvez P, P.A. Zapata

Research output: Contribution to journalArticle

  • 6 Citations

Abstract

The main results of an experimental study of the effect of temperature and nanoparticle concentration on thermal conductivity and viscosity of a nanofluid are shown. The nanofluid was prepared with Octadecane, an alkane hydrocarbon with the chemical formula CH3(CH2)16CH3, as a base fluid and 75-nm CuO spherical nanoparticles. Since the base fluid is a phase change material (PCM) to be used in thermal storage applications, the engineered nanofluid is referred to as Nano-PCM. Three Nano-PCMs were prepared by the two-step method (2.5% w/v, 5.0% w/v, and 10.0% w/v). In order to increase the stability of the Nano-PCM, the surface of the CuO nanoparticles were modified with Sodium oleate, and it was verified by IR analysis. The modified CuO nanoparticles were dispersed with an ultrasonic horn. The thermal conductivity was measured with a thermal properties analyzer in the temperature range of 30–40 °C. The viscosity was measured in the temperature range of 30–55 °C. The results for the Nano-PCM showed that thermal conductivity is almost constant in the analyzed temperature range, and the viscosity decreases non-linearly with temperature. With respect to the effect of nanoparticle concentration, both thermal conductivity and viscosity increased with nanoparticle concentration. Thermal conductivity increased up to 9% with respect to the base fluid, and viscosity increased up to 60%, in both cases with increasing concentration. Finally, the viscosity measurements for different deformation rates (30–80 RPM) showed that the addition of nanoparticles modifies the rheological behavior of the base fluid, from a Newtonian to a shear thinning (power-law) non-Newtonian behavior. © 2017 Elsevier Ltd
LanguageEnglish
Pages1009-1019
Number of pages11
JournalInternational Journal of Heat and Mass Transfer
Volume120
DOIs
Publication statusPublished - 2018

Fingerprint

phase change materials
Phase change materials
Thermal conductivity
thermal conductivity
Viscosity
viscosity
Nanoparticles
nanoparticles
Fluids
fluids
Temperature
temperature
Alkanes
shear thinning
Shear thinning
Pulse code modulation
Viscosity measurement
Hydrocarbons
Paraffins
alkanes

Keywords

  • Copper oxide
  • Nano-PCM
  • non-Newtonian fluid
  • Octadecane
  • Thermal conductivity
  • Viscosity
  • Copper compounds
  • Copper oxides
  • Heat storage
  • Lubrication
  • Magnetic storage
  • Nanofluidics
  • Nanoparticles
  • Non Newtonian flow
  • Non Newtonian liquids
  • Phase change materials
  • Rheology
  • Shear thinning
  • Temperature
  • Thermal conductivity of liquids
  • Viscosity measurement
  • Chemical formulae
  • Effect of temperature
  • Nanoparticle concentrations
  • Non-Newtonian behaviors
  • Non-Newtonian fluids
  • Rheological behaviors
  • Spherical nanoparticles

Cite this

@article{cf1097002b484364aebacead1e3522e2,
title = "Effect of temperature and CuO-nanoparticle concentration on the thermal conductivity and viscosity of an organic phase-change material",
abstract = "The main results of an experimental study of the effect of temperature and nanoparticle concentration on thermal conductivity and viscosity of a nanofluid are shown. The nanofluid was prepared with Octadecane, an alkane hydrocarbon with the chemical formula CH3(CH2)16CH3, as a base fluid and 75-nm CuO spherical nanoparticles. Since the base fluid is a phase change material (PCM) to be used in thermal storage applications, the engineered nanofluid is referred to as Nano-PCM. Three Nano-PCMs were prepared by the two-step method (2.5{\%} w/v, 5.0{\%} w/v, and 10.0{\%} w/v). In order to increase the stability of the Nano-PCM, the surface of the CuO nanoparticles were modified with Sodium oleate, and it was verified by IR analysis. The modified CuO nanoparticles were dispersed with an ultrasonic horn. The thermal conductivity was measured with a thermal properties analyzer in the temperature range of 30–40 °C. The viscosity was measured in the temperature range of 30–55 °C. The results for the Nano-PCM showed that thermal conductivity is almost constant in the analyzed temperature range, and the viscosity decreases non-linearly with temperature. With respect to the effect of nanoparticle concentration, both thermal conductivity and viscosity increased with nanoparticle concentration. Thermal conductivity increased up to 9{\%} with respect to the base fluid, and viscosity increased up to 60{\%}, in both cases with increasing concentration. Finally, the viscosity measurements for different deformation rates (30–80 RPM) showed that the addition of nanoparticles modifies the rheological behavior of the base fluid, from a Newtonian to a shear thinning (power-law) non-Newtonian behavior. {\circledC} 2017 Elsevier Ltd",
keywords = "Copper oxide, Nano-PCM, non-Newtonian fluid, Octadecane, Thermal conductivity, Viscosity, Copper compounds, Copper oxides, Heat storage, Lubrication, Magnetic storage, Nanofluidics, Nanoparticles, Non Newtonian flow, Non Newtonian liquids, Phase change materials, Rheology, Shear thinning, Temperature, Thermal conductivity of liquids, Viscosity measurement, Chemical formulae, Effect of temperature, Nanoparticle concentrations, Non-Newtonian behaviors, Non-Newtonian fluids, Rheological behaviors, Spherical nanoparticles",
author = "{{\'A}guila V}, B. and D.A. Vasco and {Galvez P}, P. and P.A. Zapata",
note = "Export Date: 12 April 2018 CODEN: IJHMA Correspondence Address: Vasco, D.A.; Departamento de Ingenier{\'i}a Mec{\'a}nica, Universidad de Santiago de Chile, Av. Lib. Bdo. O'Higgins, Chile; email: diego.vascoc@usach.cl References: Sharma, A., Tyagi, V.V., Chen, C.R., Buddhi, D., Review on thermal energy storage with phase change materials and applications (2009) Renew. Sustain. Energy Rev., 13 (2), pp. 318-345; Bahraseman, H.G., Languri, E.M., East, J., Fast charging of thermal energy storage systems enabled by phase change materials mixed with expanded graphite (2017) Int. J. Heat Mass Transf., 109, pp. 1052-1058; Al-Aifan, B., Parameshwaran, R., Mehta, K., Karunakaran, R., Performance evaluation of a combined variable refrigerant volume and cool thermal energy storage system for air conditioning applications (2017) Int. J. Refrig., 76, pp. 271-295; Motahar, S., Alemrajabi, A.A., Khodabandeh, R., Experimental study on solidification process of a phase change material containing TiO2 nanoparticles for thermal energy storage (2017) Energy Convers. Manage., 138, pp. 162-170; Barreneche, C., Navarro, H., Serrano, S., Cabeza, L.F., Fern{\'a}ndez, A.I., New database on phase change materials for thermal energy storage in buildings to help PCM selection (2014) Energy Procedia, 57, pp. 2408-2415; Harald, M., Cabeza, L.F., Heat and Cold Storage with PCM: An up to Date Introduction into Basics and Applications (2008), pp. 13-15. , Springer-Verlag Berlin; Behzadi, S., Farid, M.M., Long term thermal stability of organic PCMs (2014) Appl. Energy, 122, pp. 11-16; Akeiber, H., Nejat, P., Majid, M.Z., Wahid, M.A., Jomehzadeh, F., Famileh, I.Z., Calautit, J.K., Zaki, S.A., A review on phase change material (PCM) for sustainable passive cooling in building envelopes (2016) Renew. Sustain. Energy Rev., 60, pp. 1470-1497; Souayfane, F., Fardoun, F., Biwole, P., Phase change materials (PCM) for cooling applications in buildings: a review (2016) Energy Build., 129, pp. 396-431; V{\'e}lez, C., Khayet, M., J.M Ortiz De Z{\'a}rate, Temperature-dependent thermal properties of solid/liquid phase change even-numbered n-alkanes: N-hexadecane, n-Octadecane and n-Eicosane (2015) Appl. Energy, 143, pp. 383-394; Choi, S., Eastman, J.A., Enhancing thermal conductivity of fluids with nanoparticles. Developments applications of non-Newtonian flows (1995) ASME J. Heat Transf., 66, pp. 99-105; Das, S.K., Choi, S.U., Yu, W., Pradeep, T., Nanofluids: Science and Technology (2008), pp. 1-3. , Hoboken Wiley John & Sons; Babita, S.K., Sharma Gupta, S.M., Preparation and evaluation of stable nanofluids for heat transfer application: a review (2016) Exp. Therm. Fluid Sci., 79, pp. 202-212; Yang, L., Du, K., A comprehensive review on heat transfer characteristics of TiO2 nanofluids (2017) Int. J. Heat Mass Transf., 108, pp. 11-31; Yu, W., Xie, H., A review on nanofluids: preparation, stability mechanisms, and applications (2012) J. Nanomater., 2012, pp. 1-17; Barb{\'e}s, B., P{\'a}ramo, R., Blanco, E., Casanova, C., Thermal conductivity and specific heat capacity measurements of CuO nanofluids (2013) J. Therm. Anal. Calorim., 115, pp. 1883-1891; Ho, C.J., Gao, J.Y., Preparation and Thermophysical properties of nanoparticle-in-paraffin emulsion as phase change material (2009) Int. Commun. Heat Mass Transf., 36, pp. 467-470; Esfe, H., Saedodin, M., Asadi, S., Arash, A.K., Thermal conductivity and viscosity of Mg(OH)2-ethylene glycol nanofluids (2015) J. Therm. Anal. Calorim., 120, pp. 1145-1149; Wang, X.-Q., Mujumdar, A.S., Heat transfer characteristics of nanofluids: a review (2007) Int. J. Therm. Sci., 46, pp. 1-19; Mishra, P.C., Mukherjee, S., Nayak, S.K., Panda, A., A brief review on viscosity of nanofluids (2014) Int. Nano Lett., 4, pp. 109-120; Eggers, J.R., Kabelac, S., Nanofluids revisited (2016) Appl. Therm. Eng., 106, pp. 1114-1126; Motahar, S., Nikkam, N., Alemrajabi, A., Khodabandeh, R., Toprak, M., Muhammed, M., A novel phase change material containing mesoporous silica nanoparticles for thermal storage: a study on thermal conductivity and viscosity (2014) Int. Commun. Heat Mass Transf., 56, pp. 114-120; Motahar, S., Nikkam, N., Alemrajabi, A., Khodabandeh, R., Toprak, M., Muhammed, M., Experimental investigation on thermal and rheological properties of n-Octadecane with dispersed TiO2 nanoparticles (2014) Int. Commun. Heat Mass Transf., 59, pp. 68-74; Sharma, A.K., Tiwari, A.K., Dixit, A.R., Rheological behaviour of nanofluids: a review (2016) Renew. Sustain. Energy Rev., 53, pp. 779-791; Bashirnezhad, K., Rashidi, M., Yang, Z., Bazri, S., Yan, W., A comprehensive review of last experimental studies on thermal conductivity of nanofluids (2015) J. Therm. Anal. Calorim., 122, pp. 863-884; Elsebay, M., Elbadawy, I., Shedid, M.H., Fatouh, M., Numerical resizing study of Al2O3 and CuO nanofluids in the flat tubes of a radiator (2016) Appl. Math. Model., 40, pp. 6437-6450; Li, C., Chang, M., Colloidal stability of CuO nanoparticles in alkanes via Oleate modifications (2004) Mater. Lett., 58, pp. 3903-3907; Brookfield, A., (2016), pp. 21-22. , http://www.brookfieldengineering.com/-/media/ametekbrookfield/tech{\%}20sheets/more{\%}20solutions{\%}20to{\%}20sticky{\%}20problems{\%}202016.pdf?la=en, More solutions to sticky problems, <> (last acceded: 09/06/2017); (2015), http://app.knovel.com/hotlink/toc/id:kpDIPPRPF7/dippr-project-801-full/dippr-project-801-full, Design Institute for Physical Properties, Sponsored by AIChE, 2005, 2008, 2009, 2010, 2011, 2012, DIPPR Project 801 – Full Version, Design Institute for Physical Property Research/AIChE, <>; Chen, Y., Pearlstein, A., Viscosity-temperature correlation for glycerol-water solutions (1987) Ind. Eng. Chem. Res., 26, pp. 1670-1672; Mustafaev, R., Thermal conductivity of higher saturated n-hydrocarbons over wide ranges of temperature and pressure (1973) J. Eng. Phys. Thermophys., 24, pp. 465-469; Rastorguev, Y.L., Bogatov, G.F., Thermal conductivity of n-heptadecane and n-octadecane at high pressures and temperatures (1972) Chem. Technol. Fuels Oils, 8 (3), pp. 176-179; Yaws, C., http://app.knovel.com/hotlink/toc/id:kpYHTPPCC4/yaws-handbook-thermodynamic/yaws-handbook-thermodynamic, Yaws’ handbook of thermodynamic and physical properties of chemical compounds, Knovel, <>; Jeffrey, D., Conduction through a random suspension of spheres (1973) Proc. R. Soc. A: Math. Phys. Eng. Sci., 335, pp. 355-367; Wang, X.-Q., Mujumdar, A.S., Heat transfer characteristics of nanofluids: a review (2007) Int. J. Therm. Sci., 46 (1), pp. 1-19; Moghadassi, A., Hosseini, S.M., Henneke, D., Effect of CuO Nanoparticles in enhancing the thermal Conductivities of monoethylene glycol and paraffin fluids (2010) Ind. Eng. Chem. Res., 49, pp. 1900-1904; Xue, Q., Xu, W., A model of thermal conductivity of nanofluids with interfacial shells (2005) Mater. Chem. Phys., 90, pp. 298-301; Liu, M., Lin, M., Huang, I., Wang, C., Enhancement of thermal conductivity with CuO for nanofluids (2006) Chem. Eng. Technol., 29, pp. 72-77; Wen, D., Ding, Y., Experimental investigation into the pool boiling heat transfer of aqueous based γ-alumina nanofluid (2005) J. Nanopart. Res., 7, pp. 265-274; Mahbubul, I., Saidur, R., Amalina, M., Latest developments on the viscosity of nanofluids (2012) Int. J. Heat Mass Transf., 55, pp. 874-885; Batchelor, G., The effect of Brownian motion on the bulk stress in a suspension of spherical particles (1977) J. Fluid Mech., 83, pp. 97-117; Lee, J., Hwang, K., Jang, S., Lee, B., Kim, J., Choi, S., Choi, C., Effective viscosities and thermal conductivities of aqueous nanofluids containing low volume concentrations of Al2O3 nanoparticles (2008) Int. J. Heat Mass Transf., 51, pp. 2651-2656; Motahar, S., Alemrajabi, A., Khodabandeh, R., Enhanced thermal conductivity of n-octadecane containing carbon-based nanomaterials (2015) Heat Mass Transf., 52, pp. 1621-1631; Namburu, P., Kulkarni, D., Misra, D., Das, D., Viscosity of copper oxide nanoparticles dispersed in ethylene glycol and water mixture (2007) Exp. Therm. Fluid Sci., 32, pp. 397-402",
year = "2018",
doi = "10.1016/j.ijheatmasstransfer.2017.12.106",
language = "English",
volume = "120",
pages = "1009--1019",
journal = "International Journal of Heat and Mass Transfer",
issn = "0017-9310",
publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Effect of temperature and CuO-nanoparticle concentration on the thermal conductivity and viscosity of an organic phase-change material

AU - Águila V, B.

AU - Vasco, D.A.

AU - Galvez P, P.

AU - Zapata, P.A.

N1 - Export Date: 12 April 2018 CODEN: IJHMA Correspondence Address: Vasco, D.A.; Departamento de Ingeniería Mecánica, Universidad de Santiago de Chile, Av. Lib. Bdo. O'Higgins, Chile; email: diego.vascoc@usach.cl References: Sharma, A., Tyagi, V.V., Chen, C.R., Buddhi, D., Review on thermal energy storage with phase change materials and applications (2009) Renew. Sustain. Energy Rev., 13 (2), pp. 318-345; Bahraseman, H.G., Languri, E.M., East, J., Fast charging of thermal energy storage systems enabled by phase change materials mixed with expanded graphite (2017) Int. J. Heat Mass Transf., 109, pp. 1052-1058; Al-Aifan, B., Parameshwaran, R., Mehta, K., Karunakaran, R., Performance evaluation of a combined variable refrigerant volume and cool thermal energy storage system for air conditioning applications (2017) Int. J. Refrig., 76, pp. 271-295; Motahar, S., Alemrajabi, A.A., Khodabandeh, R., Experimental study on solidification process of a phase change material containing TiO2 nanoparticles for thermal energy storage (2017) Energy Convers. Manage., 138, pp. 162-170; Barreneche, C., Navarro, H., Serrano, S., Cabeza, L.F., Fernández, A.I., New database on phase change materials for thermal energy storage in buildings to help PCM selection (2014) Energy Procedia, 57, pp. 2408-2415; Harald, M., Cabeza, L.F., Heat and Cold Storage with PCM: An up to Date Introduction into Basics and Applications (2008), pp. 13-15. , Springer-Verlag Berlin; Behzadi, S., Farid, M.M., Long term thermal stability of organic PCMs (2014) Appl. Energy, 122, pp. 11-16; Akeiber, H., Nejat, P., Majid, M.Z., Wahid, M.A., Jomehzadeh, F., Famileh, I.Z., Calautit, J.K., Zaki, S.A., A review on phase change material (PCM) for sustainable passive cooling in building envelopes (2016) Renew. Sustain. Energy Rev., 60, pp. 1470-1497; Souayfane, F., Fardoun, F., Biwole, P., Phase change materials (PCM) for cooling applications in buildings: a review (2016) Energy Build., 129, pp. 396-431; Vélez, C., Khayet, M., J.M Ortiz De Zárate, Temperature-dependent thermal properties of solid/liquid phase change even-numbered n-alkanes: N-hexadecane, n-Octadecane and n-Eicosane (2015) Appl. Energy, 143, pp. 383-394; Choi, S., Eastman, J.A., Enhancing thermal conductivity of fluids with nanoparticles. Developments applications of non-Newtonian flows (1995) ASME J. Heat Transf., 66, pp. 99-105; Das, S.K., Choi, S.U., Yu, W., Pradeep, T., Nanofluids: Science and Technology (2008), pp. 1-3. , Hoboken Wiley John & Sons; Babita, S.K., Sharma Gupta, S.M., Preparation and evaluation of stable nanofluids for heat transfer application: a review (2016) Exp. Therm. Fluid Sci., 79, pp. 202-212; Yang, L., Du, K., A comprehensive review on heat transfer characteristics of TiO2 nanofluids (2017) Int. J. Heat Mass Transf., 108, pp. 11-31; Yu, W., Xie, H., A review on nanofluids: preparation, stability mechanisms, and applications (2012) J. Nanomater., 2012, pp. 1-17; Barbés, B., Páramo, R., Blanco, E., Casanova, C., Thermal conductivity and specific heat capacity measurements of CuO nanofluids (2013) J. Therm. Anal. Calorim., 115, pp. 1883-1891; Ho, C.J., Gao, J.Y., Preparation and Thermophysical properties of nanoparticle-in-paraffin emulsion as phase change material (2009) Int. Commun. Heat Mass Transf., 36, pp. 467-470; Esfe, H., Saedodin, M., Asadi, S., Arash, A.K., Thermal conductivity and viscosity of Mg(OH)2-ethylene glycol nanofluids (2015) J. Therm. Anal. Calorim., 120, pp. 1145-1149; Wang, X.-Q., Mujumdar, A.S., Heat transfer characteristics of nanofluids: a review (2007) Int. J. Therm. Sci., 46, pp. 1-19; Mishra, P.C., Mukherjee, S., Nayak, S.K., Panda, A., A brief review on viscosity of nanofluids (2014) Int. Nano Lett., 4, pp. 109-120; Eggers, J.R., Kabelac, S., Nanofluids revisited (2016) Appl. Therm. Eng., 106, pp. 1114-1126; Motahar, S., Nikkam, N., Alemrajabi, A., Khodabandeh, R., Toprak, M., Muhammed, M., A novel phase change material containing mesoporous silica nanoparticles for thermal storage: a study on thermal conductivity and viscosity (2014) Int. Commun. Heat Mass Transf., 56, pp. 114-120; Motahar, S., Nikkam, N., Alemrajabi, A., Khodabandeh, R., Toprak, M., Muhammed, M., Experimental investigation on thermal and rheological properties of n-Octadecane with dispersed TiO2 nanoparticles (2014) Int. Commun. Heat Mass Transf., 59, pp. 68-74; Sharma, A.K., Tiwari, A.K., Dixit, A.R., Rheological behaviour of nanofluids: a review (2016) Renew. Sustain. Energy Rev., 53, pp. 779-791; Bashirnezhad, K., Rashidi, M., Yang, Z., Bazri, S., Yan, W., A comprehensive review of last experimental studies on thermal conductivity of nanofluids (2015) J. Therm. Anal. Calorim., 122, pp. 863-884; Elsebay, M., Elbadawy, I., Shedid, M.H., Fatouh, M., Numerical resizing study of Al2O3 and CuO nanofluids in the flat tubes of a radiator (2016) Appl. Math. Model., 40, pp. 6437-6450; Li, C., Chang, M., Colloidal stability of CuO nanoparticles in alkanes via Oleate modifications (2004) Mater. Lett., 58, pp. 3903-3907; Brookfield, A., (2016), pp. 21-22. , http://www.brookfieldengineering.com/-/media/ametekbrookfield/tech%20sheets/more%20solutions%20to%20sticky%20problems%202016.pdf?la=en, More solutions to sticky problems, <> (last acceded: 09/06/2017); (2015), http://app.knovel.com/hotlink/toc/id:kpDIPPRPF7/dippr-project-801-full/dippr-project-801-full, Design Institute for Physical Properties, Sponsored by AIChE, 2005, 2008, 2009, 2010, 2011, 2012, DIPPR Project 801 – Full Version, Design Institute for Physical Property Research/AIChE, <>; Chen, Y., Pearlstein, A., Viscosity-temperature correlation for glycerol-water solutions (1987) Ind. Eng. Chem. Res., 26, pp. 1670-1672; Mustafaev, R., Thermal conductivity of higher saturated n-hydrocarbons over wide ranges of temperature and pressure (1973) J. Eng. Phys. Thermophys., 24, pp. 465-469; Rastorguev, Y.L., Bogatov, G.F., Thermal conductivity of n-heptadecane and n-octadecane at high pressures and temperatures (1972) Chem. Technol. Fuels Oils, 8 (3), pp. 176-179; Yaws, C., http://app.knovel.com/hotlink/toc/id:kpYHTPPCC4/yaws-handbook-thermodynamic/yaws-handbook-thermodynamic, Yaws’ handbook of thermodynamic and physical properties of chemical compounds, Knovel, <>; Jeffrey, D., Conduction through a random suspension of spheres (1973) Proc. R. Soc. A: Math. Phys. Eng. Sci., 335, pp. 355-367; Wang, X.-Q., Mujumdar, A.S., Heat transfer characteristics of nanofluids: a review (2007) Int. J. Therm. Sci., 46 (1), pp. 1-19; Moghadassi, A., Hosseini, S.M., Henneke, D., Effect of CuO Nanoparticles in enhancing the thermal Conductivities of monoethylene glycol and paraffin fluids (2010) Ind. Eng. Chem. Res., 49, pp. 1900-1904; Xue, Q., Xu, W., A model of thermal conductivity of nanofluids with interfacial shells (2005) Mater. Chem. Phys., 90, pp. 298-301; Liu, M., Lin, M., Huang, I., Wang, C., Enhancement of thermal conductivity with CuO for nanofluids (2006) Chem. Eng. Technol., 29, pp. 72-77; Wen, D., Ding, Y., Experimental investigation into the pool boiling heat transfer of aqueous based γ-alumina nanofluid (2005) J. Nanopart. Res., 7, pp. 265-274; Mahbubul, I., Saidur, R., Amalina, M., Latest developments on the viscosity of nanofluids (2012) Int. J. Heat Mass Transf., 55, pp. 874-885; Batchelor, G., The effect of Brownian motion on the bulk stress in a suspension of spherical particles (1977) J. Fluid Mech., 83, pp. 97-117; Lee, J., Hwang, K., Jang, S., Lee, B., Kim, J., Choi, S., Choi, C., Effective viscosities and thermal conductivities of aqueous nanofluids containing low volume concentrations of Al2O3 nanoparticles (2008) Int. J. Heat Mass Transf., 51, pp. 2651-2656; Motahar, S., Alemrajabi, A., Khodabandeh, R., Enhanced thermal conductivity of n-octadecane containing carbon-based nanomaterials (2015) Heat Mass Transf., 52, pp. 1621-1631; Namburu, P., Kulkarni, D., Misra, D., Das, D., Viscosity of copper oxide nanoparticles dispersed in ethylene glycol and water mixture (2007) Exp. Therm. Fluid Sci., 32, pp. 397-402

PY - 2018

Y1 - 2018

N2 - The main results of an experimental study of the effect of temperature and nanoparticle concentration on thermal conductivity and viscosity of a nanofluid are shown. The nanofluid was prepared with Octadecane, an alkane hydrocarbon with the chemical formula CH3(CH2)16CH3, as a base fluid and 75-nm CuO spherical nanoparticles. Since the base fluid is a phase change material (PCM) to be used in thermal storage applications, the engineered nanofluid is referred to as Nano-PCM. Three Nano-PCMs were prepared by the two-step method (2.5% w/v, 5.0% w/v, and 10.0% w/v). In order to increase the stability of the Nano-PCM, the surface of the CuO nanoparticles were modified with Sodium oleate, and it was verified by IR analysis. The modified CuO nanoparticles were dispersed with an ultrasonic horn. The thermal conductivity was measured with a thermal properties analyzer in the temperature range of 30–40 °C. The viscosity was measured in the temperature range of 30–55 °C. The results for the Nano-PCM showed that thermal conductivity is almost constant in the analyzed temperature range, and the viscosity decreases non-linearly with temperature. With respect to the effect of nanoparticle concentration, both thermal conductivity and viscosity increased with nanoparticle concentration. Thermal conductivity increased up to 9% with respect to the base fluid, and viscosity increased up to 60%, in both cases with increasing concentration. Finally, the viscosity measurements for different deformation rates (30–80 RPM) showed that the addition of nanoparticles modifies the rheological behavior of the base fluid, from a Newtonian to a shear thinning (power-law) non-Newtonian behavior. © 2017 Elsevier Ltd

AB - The main results of an experimental study of the effect of temperature and nanoparticle concentration on thermal conductivity and viscosity of a nanofluid are shown. The nanofluid was prepared with Octadecane, an alkane hydrocarbon with the chemical formula CH3(CH2)16CH3, as a base fluid and 75-nm CuO spherical nanoparticles. Since the base fluid is a phase change material (PCM) to be used in thermal storage applications, the engineered nanofluid is referred to as Nano-PCM. Three Nano-PCMs were prepared by the two-step method (2.5% w/v, 5.0% w/v, and 10.0% w/v). In order to increase the stability of the Nano-PCM, the surface of the CuO nanoparticles were modified with Sodium oleate, and it was verified by IR analysis. The modified CuO nanoparticles were dispersed with an ultrasonic horn. The thermal conductivity was measured with a thermal properties analyzer in the temperature range of 30–40 °C. The viscosity was measured in the temperature range of 30–55 °C. The results for the Nano-PCM showed that thermal conductivity is almost constant in the analyzed temperature range, and the viscosity decreases non-linearly with temperature. With respect to the effect of nanoparticle concentration, both thermal conductivity and viscosity increased with nanoparticle concentration. Thermal conductivity increased up to 9% with respect to the base fluid, and viscosity increased up to 60%, in both cases with increasing concentration. Finally, the viscosity measurements for different deformation rates (30–80 RPM) showed that the addition of nanoparticles modifies the rheological behavior of the base fluid, from a Newtonian to a shear thinning (power-law) non-Newtonian behavior. © 2017 Elsevier Ltd

KW - Copper oxide

KW - Nano-PCM

KW - non-Newtonian fluid

KW - Octadecane

KW - Thermal conductivity

KW - Viscosity

KW - Copper compounds

KW - Copper oxides

KW - Heat storage

KW - Lubrication

KW - Magnetic storage

KW - Nanofluidics

KW - Nanoparticles

KW - Non Newtonian flow

KW - Non Newtonian liquids

KW - Phase change materials

KW - Rheology

KW - Shear thinning

KW - Temperature

KW - Thermal conductivity of liquids

KW - Viscosity measurement

KW - Chemical formulae

KW - Effect of temperature

KW - Nanoparticle concentrations

KW - Non-Newtonian behaviors

KW - Non-Newtonian fluids

KW - Rheological behaviors

KW - Spherical nanoparticles

U2 - 10.1016/j.ijheatmasstransfer.2017.12.106

DO - 10.1016/j.ijheatmasstransfer.2017.12.106

M3 - Article

VL - 120

SP - 1009

EP - 1019

JO - International Journal of Heat and Mass Transfer

T2 - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

ER -