Experimental study of the thermal performance of thermosyphon heat pipe using iron oxide nanoparticles

Huminic, Gabriela; Huminic, Angel; Morjan, I.; Dumitrache, Florian

doi:10.1016/j.ijheatmasstransfer.2010.09.005

Cited by 149 publications

(39 citation statements)

References 16 publications

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“…Results of the experiments confirmed higher thermal performance of heat pipes by a decrease in temperature gradient through them [27] or a reduction in thermal resistance [16,22,26,27,30]. In some experiments, higher heat transfer rates [34] and heat transfer coefficients [26,32] of heat pipes have been also observed. Despite extensive researches on heat pipes using nanofluids, practical application of this device in AC systems is hardly found.…”

mentioning

confidence: 60%

“…In addition, the thermal resistance of heat pipes is mostly affected by the vapor bubble formation. It is anticipated that nanoparticles bombard the bubble nuclei and reduce their size which leads to less thermal resistance [22,34]. Moreover, due to raised wettability in the presence of nanoparticles, the critical heat flux enhanced.…”

Section: The Effect Of Nanofluid Concentration At Various Temperaturementioning

confidence: 99%

“…A wide range of nanoparticles such as Ag [15][16][17][18][19][20], diamond [21], Au [22], Ti [23][24][25], Cu [26], Al 2 O 3 [27][28][29][30][31], CuO [26,28,[30][31][32], TiO 2 [30,31], SiO [26], Fe 2 O 3 /Fe 3 O 4 [33,34], CNT [35,36] have been used in various base fluids which were mostly water and alcohol. The effect of nanoparticles characteristics (such as type [26,30], particle size [16,22,26,27,30] and concentration in the base fluid [16,22,24,26,30,34]), as well as heat pipe design parameters [such as filling ratio (F.R.) [24], aspect ratio, inclination angle [24], wick structure, operating pressure [26], and length of various sections] and operational conditions (such as input power to the evaporator) on the thermal performance of heat pipes were investigated in these studies.…”

mentioning

confidence: 99%

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Performance enhancement of an experimental air conditioning system by using TiO2/methanol nanofluid in heat pipe heat exchangers

et al. 2015

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Specific enthalpy of desired conditioned air (at 18 °C and 55 % RH) HPHX Heat pipe heat exchanger HVAC Heating, ventilation, and air conditioninġ m Mass flow rate of air passing through the condenseṙ m min Minimum of mass flow rates between air streams in pre-cooling and reheating sections q act Actual heat transfer rate q max Maximum heat transfer rate RH Relative humidity RH e,i Relative humidity of inlet air to the HPHX evaporator S e Energy saving in evaporator section S c Energy saving in condenser section S t Total energy saving T c,i Temperature of inlet air to the HPHX condenser T C,d Temperature of desired outlet air from the AC system (at 9 °C and 100 % RH) T c,o Temperature of outlet air from the HPHX condenser T e,i Temperature of inlet air to the HPHX evaporator T e,o Temperature of outlet air from the HPHX evaporator ε Effectiveness of HPHX δ Uncertainty

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mentioning

confidence: 60%

Section: The Effect Of Nanofluid Concentration At Various Temperaturementioning

confidence: 99%

mentioning

confidence: 99%

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Performance enhancement of an experimental air conditioning system by using TiO2/methanol nanofluid in heat pipe heat exchangers

et al. 2015

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“…Huminic G. and Huminic A. [11] and Huminic et al [20] revealed that independent of inclination angle (30 • , 45 • , 60 • and 90 • ) application of water-iron oxide nanofluids improves performance of thermosyphon heat pipe. The volume concentration of the nanoparticles was equal to 2% and 5.3%.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanofluid concentration on two-phase thermosyphon heat exchanger performance

Cieśliński

2016

Archives of Thermodynamics

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An approach -relaying on application of nanofluid as a working fluid, to improve performance of the two-phase thermosyphon heat exchanger (TPTHEx) has been proposed. The prototype heat exchanger consists of two horizontal cylindrical vessels connected by two risers and a downcomer. Tube bundles placed in the lower and upper cylinders work as an evaporator and a condenser, respectively. Distilled water and nanofluid water-Al2O3 solution were used as working fluids. Nanoparticles were tested at the concentration of 0.01% and 0.1% by weight. A modified Peclet equation and Wilson method were used to estimate the overall heat transfer coefficient of the tested TPTHEx. The obtained results indicate better performance of the TPTHEx with nanofluids as working fluid compared to distilled water, independent of nanoparticle concentration tested. However, increase in nanoparticle concentration results in overall heat transfer coefficient decrease of the TPTHEx examined. It has been observed that, independent of nanoparticle concentration tested, decrease in operating pressure results in evaporation heat transfer coefficient increase.

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“…livery or therapeutic agents in cancer therapy and thermal engineering application [4]- [8]. Iron oxide nanoparticles, mainly magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ), are favorable magnetic materials that are intensively explored due to their specific magnetic properties [9].…”

mentioning

confidence: 99%

The Effect of Temperature on Synthesis and Stability of Superparamagnetic Maghemite Nanoparticles Suspension

Nurdin¹,

Ridwan²,

Satriananda³

2016

MSCE

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Maghemite (γ-Fe 2 O 3 ) nanoparticles have been synthesized using chemical co-precipitation at a different temperature. Characterizations of the sample were performed by X-ray diffraction (XRD), transmission electron microscopy (TEM), alternating gradient magnetometry (AGM) and thermogravimetryanalysis (TGA). The stability of the maghemite nanoparticles suspension was studied at different pH and time of storage by dynamic light scattering (DLS) and zeta potential measurements. The XRD patterns confirmed that the particles were maghemite. TEM observation showed that the particles have spherical morphology with narrow particle size distribution. The particles showed superparamagnetic behavior with good thermal stability. The increasing of temperature in the synthesis of maghemite nanoparticles produced smaller size particles, lower magnetization, better thermal stability and more stable maghemite nanoparticle suspension.

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Experimental study of the thermal performance of thermosyphon heat pipe using iron oxide nanoparticles

Cited by 149 publications

References 16 publications

Performance enhancement of an experimental air conditioning system by using TiO2/methanol nanofluid in heat pipe heat exchangers

Performance enhancement of an experimental air conditioning system by using TiO2/methanol nanofluid in heat pipe heat exchangers

Effect of nanofluid concentration on two-phase thermosyphon heat exchanger performance

The Effect of Temperature on Synthesis and Stability of Superparamagnetic Maghemite Nanoparticles Suspension

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