R. Pushpangadan, A. Soman, Arundas R., N. G. Thoppan, S. P. Duttagupta
Department of Electrical Engineering, Indian Institute of Technology Bombay, Mumbai, Maharashtra, India
College of Engineering, Munnar, Kerala, India
PEM fuel cells are very promising for portable applications. A key component of fuel cell is the flow field plate through which hydrogen will reach the anode, oxygen will reach the cathode and electron collection. Flow field plate made of silicon is not a good electrical conductor , so electrical contacts has to be attached to the Gas Diffusion Layer (GDL) for taking the power to outside ...
Simulation and Analysis of Two Fans Air Speed Match Design in Off-Road Mine Tract Generator Using COMSOL
Y. Shen, D. Wu
Beijing University of Science & Technology, Beijing, China
This paper describes a model of self-ventilated generator cooling on a 170 tons off-road mine dump truck. Considering the space restrictions of mine dump truck, the cooling systems for the generator and the in-wheel motors of the rear axle share one air inlet duct. With the action of generator fan and rear duct fan, cooling air from the inlet duct will be divided into two parts to cool the ...
Modelling of a 5 Cell Intermediate Temperature Polymer Electrolyte Fuel Cell (IT-PEFC) Stack: Analysis of Flow Configuration and Heat Transfer
A.S. Chandan, A. Mossadegh Pour, R. Steinberger-Wilckens
Centre for Hydrogen and Fuel Cell Research, University of Birmingham, Birmingham, United Kingdom
University of Birmingham, Birmingham, United Kingdom
Polymer Electrolyte Fuel Cells (PEFCs) are a key technology in the advancement of society towards a low carbon future, in particular for use within the automotive sector. PEFCs are advantageous due to their low operating temperature (60-80 deg.C), quick start up times and responsiveness to load change. However, the requirement for expensive platinum, difficulty of water management and heat ...
J. S. Crompton, H. Singh, K. Koppenhoefer
AltaSim Technologies, LLC, Columbus, OH, USA
In response to continued miniaturization and increased multi-functionality of electronic circuits, the number of integrated circuit (IC) packages on the circuit board continues to increase. As a consequence the operating power density increases and significant increases in the operating temperature of devices result. To maintain operation and long term performance device temperature must be ...
Extraction of Thermal Characteristics of Surrounding Geological Layers of a Geothermal Heat Exchanger by COMSOL Multiphysics® Simulations - new
N. Aranzabal, J. Martos, J. Soret, J. Torres, R. García-Olcina, Á. Montero
Technical School of Engineering, University of Valencia, Valencia, Spain
Department of Applied Physics, Politechnical University of Valencia, Valencia, Spain
It has been demonstrated that is possible obtain the thermal parameters of geological layers of a BHE (Borehole Heat Exchanger) by fitting temperature evolution in an observer pipe inserted into borehole.
B. Noailles  , S. Meunier , V. Bruyere 
 RocTool, Savoie Technolac, Module R, France
 SIMTEC, France
In the molding industry, high productivity rate, low energy consumption, large 3D parts, and homogeneous temperature distribution are the main targets. The 3iTech® inductive technology developed by RocTool ensures both good temperature homogeneity and short heating time. Conventionally, to guarantee efficient cooling, a turbulent water flow is directly integrated into the mold. Ideally, to cope ...
Y. K. Hwa 
 National University of Singapore, Singapore
The present work investigates the role of suspended liquid-gas interfaces for applications involving the reduction in flow resistance using the COMSOL multiphysics software. A pressure-driven viscous flow of a liquid through microtubes containing superhydrophobic surfaces patterned with alternating micro-grooves and ribs has been considered. Employing a 3D simulation, a fully-developed laminar ...
V. Sharma, S. K. Dash, G. Vijaykumar, B. K. Nashine, B. Krishnakumar, P. Kalyanasundaram, and G. Vaidyanathan
Fast Reactor Technology Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India
Permanent Magnet Flowmeter (PMFM) is a non invasive device, which is used to measure the flow of electricallyconducting sodium in Fast Breeder Reactor Circuits. PMFM works on the principle of generation of motional EMF by magnetic forces exerted on the charges in a moving conductor. In this paper modeling of PMFM with different pipe sizes is done to predict the flowmeter output for a given ...
Dynamic Observation of Magnetic Particles in Continuous Flow Devices by Tunneling Magnetoresistance Sensors
A. Weddemann, A. Auge, F. Wittbracht, C. Albon, and A. Hütten
Department of Physics, Thin Films and Physics of Nanostructures, Bielefeld University, Bielefeld, Germany
Dynamic measurement of magnetic particles in continuous flow devices is made very difficult by the limitations imposed by the sensors themselves. Thus, certain sensor layouts are restricted to either number sensitive or spatial resolutive measurements of magnetic particles. We investigate different new strategies to increase the detection threshold and introduce designs accomplishing both: ...
High Coupling Factor Piezoelectric Materials for Bending Actuators: Analytical and Finite Elements Modeling Results
I.A. Ivan, M. Rakotondrabe, and N. Chaillet
FEMTO-ST Institute, University of Franche-Comte, Besançon, France
New giant piezoelectric factor materials such as PMN-PT and PZN-PT were researched during the last decade and are actually becoming commercially available. As they seem very attractive for actuator designs, we studied their potential in replacing PZT ceramics. In a first comparative approach, we tested a series of classic rectangular composite bimorph structures of different combinations of ...