Skip to main content
SpringerLink
Log in

Experimental investigation on the effect of nanofluid on the thermal performance of symmetric sintered U shaped heat pipe

  • Original
  • Published:
Heat and Mass Transfer Aims and scope Submit manuscript

Abstract

In this study, the impact of Entrance Power and Silver nanofluid concentration (with base fluid ethanol and DI-water) on heat pipe thermal performance are considered. In order to reach the aim a U-shaped sintered heat pipe is utilized which causes occupied space to decline. The length of the heat pipe is 135 mm in each branch. On account of recognition the effect of working fluid on heat pipe thermal performance, thermal resistance and overall heat transfer coefficient in base working fluid and nano-colloidal silver are measured in the shape of thermosyphon. The working fluid is with volume percentages of 70 ethanol and 30 distilled water. The average size pertaining to the nanoparticle applied is 40 nm. In addition, the influences of nanofluid concentrations are measured by comparing three concentrations 0.001, 0.005, 0.1 vol%. The range of entrance power is from 10 to 40 W and the temperature of coolant has been changed from 20 to 40 °C. The results of the experiment indicate that by increasing entrance power, the temperatures of the condenser, evaporator and working temperature experience a rise. Furthermore, this causes a decrease of thermal resistance and an increase of overall heat transfer coefficient. A comparison of three concentrations reveals that in concentration of 50 ppm, thermal resistance compared to the base fluid has decreased to 42.26 % and overall heat transfer coefficient has gone up to 1883 (W/m2·°K) . Also, due to unexpected changes in concentration of 1000 ppm, the existence of an optimized concentration for the silver nanofluid in this heat pipe with this geometry has been clear.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8

Similar content being viewed by others

Abbreviations

ΔT :

Difference temperature (°C)

Q :

Load heat (W)

R :

Thermal resistance (°C/W )

δ :

Partial derivative

L:

Length (m)

D:

Diameter (m)

U:

Overall heat transfer coefficient (W/m2·°K)

References

  1. Trisaksri V, Wongwises S (2007) Critical review of heat transfer characteristics of nanofluids. Renew Stud Energy Rev 11:512–523

    Article  Google Scholar 

  2. Lee S, Choi SUS, Eastman JA, Lee S (1999) Measuring thermal conductivity of fluids containing oxid nanoparticles. Trans ASME 121:280–289

    Article  Google Scholar 

  3. Choi SUS, Wang X, Xu W (1999) Thermal conductivity of nano-particle-fluid mixture. J Thermophys Heat Transf 13(4):474–480

    Article  Google Scholar 

  4. Xie H, Wang J, Xi T, Liu Y (2002) Thermal conductivity of suspensions containing nano-sized SiC particles. Int J Thermophys 23(2):571–580

    Article  Google Scholar 

  5. Xie X, Lee H, Youn W, Choi M (2003) Nanofluids containing multiwalled carbon nano-tubes and their enhanced thermal conductivities. J Appl Phys 94(8):4967–4971

    Article  Google Scholar 

  6. Xuan Y, Li Q (2000) Heat transfer enhancement of nanofluids. Int J Heat Fluid Flow 21:58–64

    Article  Google Scholar 

  7. Choi SUS, Eastman JA, Li W, Yu S, Thompson J (2001) Anomalously increased effective thermal conductivities of ethylene glycol-based containing copper nanoparticles. Appl Phys Lett 78(6):718–720

    Article  Google Scholar 

  8. Das SK, Putra N, Thiesen P, Roetzel W (2003) Temperature dependence of thermal conductivity enhancement for nanofluids. J Heat Transf 125:567–574

    Article  Google Scholar 

  9. Wei WC, Tsai SH, Yang SY, Kang SW (2005) Effect of nanofluid concentration on heat pipe thermal performance. Int Assos Mech Eng Trans 2:1432–1439

    Google Scholar 

  10. Naphon P, Assadamong kol P, Borirak T (2008) Experimental investigation of titanium nanofluids on the heat pipe thermal efficiency. Int J Heat Mass Transf 35:1316–1319

    Article  Google Scholar 

  11. Kang SW, Wei WC, Tsai SH, Yang SY (2006) Experimental investigation of silver nanofluid on heat pipe thermal performance. Appl Thermal Eng 26:2377–2382

    Article  Google Scholar 

  12. Chen YT (2010) Experimental study of silver nanofluid on flat heat pipe thermal performance. J Mar Sci Technol 18:731–734

    Google Scholar 

  13. Julang J et al (2011) Particle shape effect on heat transfer performance in an oscillating heat pipe. Nano Express 6:296

    Google Scholar 

  14. Shanbedi M et al (2011) Investigation of heat-transfer characterization of EDA-MWCNT/DI-water nanofluid in a two-phase closed thermosyphon. Ind Eng Chem Res. doi:10.1021/ie202110g

    Google Scholar 

  15. Mousa MG (2011) Effect of nanofluid concentration on the performance of circular heatpipe. Ain Shams Eng J 2(1):60–63

    Article  Google Scholar 

  16. Hajian R et al (2012) Experimental study of nanofluid effects on the thermal performance with response time of heat pipe. Energy Convers Manag 56:63−68

  17. Amiri A et al (2014) Performance dependence of thermosyphon on the functionalization approaches: an experimental study on thermo-physical properties of graphene nanoplatelet-based water nanofluids. Energy Convers Manag 95:322–330

    Google Scholar 

  18. Nazarimanesh M et al (2015) Experimental study on the effects of inclination situation of the sintered heat pipe on its thermal performance. Exp Therm Fluid Sci 68:625–633

  19. Dortmund Data Bank, Thermophysical Data for Process Design,  http://ddbonline.ddbst.com. Accessed February 2015

Download references

Author information

Authors and Affiliations

  1. Mechanical and Industrial Engineering Department, Azad University of Tehran South branch, Tehran, Iran

    Meysam Nazarimanesh

  2. Department of Mechanical Engineering, Faculty of Engineering, Razi University, Kermanshah, Iran

    Tooraj Yousefi

  3. Department of Mechanical Engineering, Faculty of Engineering, University of Tehran, Tehran, Iran

    Mehdi Ashjaee

Authors
  1. Meysam Nazarimanesh
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Tooraj Yousefi
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Mehdi Ashjaee
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Meysam Nazarimanesh.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Nazarimanesh, M., Yousefi, T. & Ashjaee, M. Experimental investigation on the effect of nanofluid on the thermal performance of symmetric sintered U shaped heat pipe. Heat Mass Transfer 52, 1255–1264 (2016). https://doi.org/10.1007/s00231-015-1644-x

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00231-015-1644-x

Keywords

Search

Navigation