Open AccessOperational Limitations of Heat Pipes with MgO-Water Nanofluid: An Experimental Investigation
Author(s) -
Udayvir Singh,
Naveen Kumar Gupta
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1116/1/012054
Subject(s) - nanofluid , heat pipe , capillary action , evaporator , boiling , working fluid , materials science , thermodynamics , entrainment (biomusicology) , mechanics , composite material , heat transfer , heat exchanger , physics , rhythm , acoustics
This paper presents the study of functional limits of heat pipes with MgO deionized (DI) water nano fluid as working fluid. The nano fluid is made with the help of two step method and it is surfactant free. The output has been analyzed with the increase in concentrations of MgO / DI water nano fluid (0.005%, 0.025% and 0.05 %) and at power input of (10 W, 30 W & 60 W), for covering operational range temperature of the electronic instruments. (<60 0 C). On the basis of the thermo physical properties of the MgO/DI water nano fluid, the functional limits of heat pipe are determined. The changed of working fluids shows an improvement in boiling, pick up(entrainment), viscous and sonic limit except the capillary limit of heat pipe. The surfactant free nano fluids give good safety margin to the boiling limit of the heat pipe, with elimination of chances of locking due to vapor. The capillary limit reduces by the application of nano fluids due to increase in the vapor and liquid flow path resistance rather than capillary pressure in the evaporator section of heatpipe.