The goal of this paper is to experimentally study the behavior of nanofluid to improve the performance of a circular heat pipe. Pure water and Al2O3-water based nanofluid are used as working fluids. An experimental setup is designed and constructed to study the heat pipe performance under different operating conditions. The effect of filling ratio, volume fraction of nano-particle in the base f...

A numerical method based on the SIMPLE algorithm has been developed for the analysis of vapor flow in a concentric annular heat pipe. The steady-state response of a concentric annular heat pipe to various heat fluxes in the evaporator and condenser sections are studied. The fluid flow and heat transfer in the annular vapor space are simulated using Navier-Stokes equations. The governing equatio...

Abstract The present work presents a multifunctional structure for space engineering application part of the TOPDESS project, funded by ESA. main aim project is design thermal control device able to deploy through passive actuation. A combined has been designed, made up Pulsating Heat Pipe (PHP) foldable heat exchanger and Shape Memory Alloy (SMA) wire. deployment SMA wire conceived be controll...

The aim of the article is to numerically model a two-dimensional multiphase flow based on volume fluid method (VOF) in pulsating heat pipe (PHP). current state knowledge regarding modeling these devices was studied and summarised. proposed developed within open source software, OpenFOAM, predefined solver called interPhaseChangeFoam. analyses were carried out terms influence four different mass...

The present investigation deals with the quantification of fluid oscillation frequencies in a metallic pulsating heat pipe tested at varying loads and orientations. aim is to design robust technique for study inner dynamics without adopting typical experimental solutions, such as direct visualizations through transparent inserts. studied device made copper, it partially filled water–ethanol mix...

In this research, the application of heat pipes in the air handler dedicated to decoupling dehumidification from cooling to reduce energy consumption was simulated and investigated by simulations and experimental studies. The cooling load profiles and heat pipes with effectiveness of 0.45 and 0.6, respectively, were evaluated in achieving the desired space conditions and calculated hour by hour...