International Journal of Mechanical Engineering and Research

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Review on: The Characteristics Parameters affecting on thermal performance of Close Loop Pulsating Heat Pipe

Research Area: Volume 3 Issue 1 Year: 2014
Type of Publication: Article Keywords: Pulsating heat pipe, heat transfer, working fluid, heat flux
Authors:
  • Prashant B. Dukare
  • Nilesh Diwakar
Journal: IJMER Volume: 3
Number: 1 Pages: 12-17
Month: January
ISSN: 2277-8128
Abstract:
The closed loop Pulsating Heat Pipes (CLPHPs) are two-phase passive heat transfer devices that enhances large amount of heat which works on the principle of evaporation and condensation of a working fluid. CLPHP mainly consists of capillary tube made by copper and bent in many turns, which is firstly evacuated, then partially filled with an appropriate working fluid and finally sealed. At the one end heat is absorbed by evaporation and heat rejected through another end by condensation of working fluid. The Selection of working fluids are depending on the desired performance from the device and the performance of device depends on the thermo physical properties of working fluids. Working fluids which is having lower saturation temperature, lower latent heat, high specific heat and low dynamic viscosity gives better thermal performance. The different input parameters on which thermal performance dependency found these are internal tube diameter, input heat flux, filling ratio, number of turns, device orientation, size and capacity of condenser and evaporator. In spite of wide applications of heat pipe in microelectronics cooling system and power utilization has been increased each year and a complete understanding of mechanism has not yet been completed even though it has the ability to operate against gravity and a greater maximum heat transport capability This paper highlights on thermo-hydrodynamic characteristics of these devices and literature review on heat pipe technology and unsolved issues on the mechanism of PHP operation at different type of fluid, validation techniques and applications are discussed.
Full text: 313.pdf

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