In this paper, heat transfer during simultaneously developing singlephase laminar flow inside a pipe has been investigated numerically. A two dimensional axisymmetric model of a circular mini-channel is used, with a constant wall temperature boundary condition. In the present simulations, flow Reynolds number (Re) and amplitude ratio (A) are kept constant to 200 and 0.2, respectively. The varia...

The structure and inclination angle of a pulsating heat pipe are critical factors influencing the transfer performance operation mode. In this work, single-layer double-row is designed, start-up characteristics at limit angles (0?, 90?, 180?) experimentally investigated. Also, mode studied through infrared imager temperature profiles. study highlighted that has excellent in angle. When 0?, impr...

Proton exchange membrane fuel cell (PEMFC) has the advantages of high energy efficiency, clean, pollution-free, fast start-up and noise-free, but its thermal management problems still restrict development practical application PEMFC. This paper analyzes important influence heat on working performance proton cell, summarizes structure principle effect evaluation system using pipe under premise s...

This paper presents the experimental investigations conducted on a vertical closed loop pulsating heat pipe (VCLPHP) to evaluate the thermal performance. The values of thermal resistance and heat transfer coefficient obtained in the experimentation is used as evaluation parameters. The VCLPHP used has capillary tubes having an inner diameter of 2mm and outside diameter 3mm and bent into 5 turns...