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Heat and Mass Transfer

, Volume 55, Issue 2, pp 375–384 | Cite as

Experimental investigation on thermal performance of closed loop pulsating heat pipes with soluble and insoluble binary working fluids and a proposed correlation

  • R. Zamani
  • K. Kalan
  • M. B. ShafiiEmail author
Original
  • 61 Downloads

Abstract

In this study, an experimental investigation was conducted from a thermal performance standpoint on closed-loop pulsating heat pipes (CLPHPs) with four different fluids and their water-based binary mixtures as working fluids with volume mixing ratios of 3:1, 1:1, and 1:3. Ethanol and acetone as two types of fluids that are soluble in water and, to unprecedentedly compare the behavior of insoluble mixtures with the soluble ones as the working fluids, toluene and hexane as two types that are insoluble in water were used. Additionally, to predict the thermal performance of the pure, soluble binary, and insoluble binary fluids simultaneously for the first time, a correlation was derived.

Nomenclature

D

Diameter (mm).

R

Thermal resistance (°C/W).

Cp

Specific heat (Kj/Kg°C).

\( \overline{T} \)

Average temperature (°C).

\( \dot{Q} \)

Heat input (W).

hfg

Latent heat of vaporization (Kj/Kg).

Tb

Boiling temperature (°C).

K

Thermal conductivity (W/°C).

U

Voltage (V).

I

Current (A).

Ku

Kutateladze.

Bo

Bond number.

Mo

Morton number.

Pr

Prandtl number.

Ja

Jacob number.

g

gravitational acceleration (m / s2).

Greek symbols

ơ

surface tension (N/m).

μ

dynamic viscosity (N.s/m2).

ρ

density (Kg/m3).

Subscripts

a

adiabatic section.

c

condenser section.

i

inner

l

liquid

ϑ

vapor

exp.

experiment.

pre

prediction.

Notes

Acknowledgements

We would like to express our gratitude to the Deputy for Research and Technology of Sharif University of Technology for supporting this research study.

Compliance with ethical standards

Conflict of interest

On behalf of all authors, the corresponding author states that there is no conflict of interest.

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Sharif Energy Research InstituteTehranIran
  2. 2.School of Mechanical EngineeringSharif University of TechnologyTehranIran

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