E. Lacatus , A. Tudor , G. C. Alecu ,
 Polytechnic University of Bucharest, Romania
The confinement clean rooms used in industry are susceptible to higher count of particles per cubic meter of air after the usual work program. To decrease the economic and technological effects of particle concentration a micro-cleaning device was elaborated. A first approach of a 3D model of the device was produced and different issues were found. Using COMSOL Multiphysics software to identify ...
V. Di Marcello, A. Cammi, and L. Luzzi
Department of Energy, Nuclear Engineering Division (CeSNEF), Politecnico di Milano, Milano, Italy
This paper presents a preliminary analysis of the coupled thermo-hydrodynamics and neutronics of circulating nuclear fuel systems in a nuclear reactor that adopts a molten salt mixture. This flows up through channels in a graphite moderated core and plays the role of both heat generator and coolant. A strongly coupled system is needed since the velocity pattern is affected by the neutron ...
Multiphysics and Simulation of MEMS based Bolometer for Detecting the Radiations in Nuclear Power Plants
K. Umapathi, S. Swetha, K. Ranjitha, K. Vinodh, K. Deebiga, R. Harisudarsan
United Institute of Technology, Coimbatore, TamilNadu, India
Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu, India
High performance micro sensors are important to detecting special nuclear materials radiations in different fields to save the globe. This paper is mainly focused on to develop a MEMS based bolometer for detecting the nuclear radiation to provide the high security in Nuclear power Plants. A thermally sensitive micro metal plate is designed and placed on a substrate through micro thermal link. ...
Numerical Modeling of the Original and Advanced TEMKIN Reactor for Catalysis Experiments in Laboratory Scale - new
D. Götz, M. Kuhn, P. Claus
Ernst-Berl-Institute/Chemical Technology II, Darmstadt, Germany
Many industrial, especially heterogeneously catalysed, processes are characterised by a strong interaction between the reaction kinetics and transport phenomena. Because experiments in laboratory scale can be very time- and cost-intensive, Temkin andKul’kova developed a new reactor design for the direct testing of industrial catalysts. Based on this concept of linearly alternating catalyst and ...
R. Busqué , R. Torres , A. Husar , J. Grau 
 Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona, Barcelona, Spain
 Institut de Robòtica i Informàtica Industrial CSIC-UPC, Barcelona, Spain
The storage of hydrogen as an absorbed element in metal hydride bottles is a promising technique for energy storage. In this work, a three-dimensional model of a charging process in a metal hydride container has been developed to simulate the absorption reaction and resultant heat and mass transport phenomena in metal hydride vessels. The model has been experimentally validated showing a good ...
S. Durgam , S. P. Venkateshan , T. Sundararajan ,
 Indian Institute of Technology Madras, Chennai, India
This paper deals with the numerical study of optimal distribution of rectangular heat sources populated on a substrate board for electronic cooling. The simulations are performed for laminar forced convection conjugate heat transfer with vertical orientation of substrate board. The laminar forced convection - conjugate heat transfer simulations are carried out using COMSOL Multiphysics® with ...
Y. Wang, D. Uwe Sauer
Electrochemical Energy Conversion and Storage Systems, Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, Aachen, Germany
HTPEM fuel cells are considered to be the next generation fuel cells. The electrochemical kinetics for electrode reactions are enhanced by using PBI membrane at an operation temperature between 160-180 °C comparing to LTPEM fuel cells. But starting HTPEM fuel cells from room temperature to an operation temperature is a challenge. In this work, using preheated air to heat up the fuel cells ...
ENERSPACE Srl, Genoa, Italy
A model built with COMSOL Multiphysics® to exploit meteorological forecasts and instant outdoor meteorological data (temperature, solar radiation, moisture, wind speed and direcition, etc.) together with indoor ambient data (air temperature, radiant temperature of enclosures, etc), building parameters (mass, orientation, surface, structural composition, etc.) and historical consumption of ...
Bruno Chinè , Valerio Mussi , Michele Monno , Andrea Rossi ,
 School of Materials Science and Engineering, Costa Rica Institute of Technology, Cartago, Costa Rica
 Macchine Utensili e Sistemi di Produzione, Piacenza, Italy
 Dipartimento di Meccanica, Politecnico di Milano, Milano, Italy
Metal foams are interesting materials with many potential applications. Foamed metals or alloys include gas voids in the material structure and therefore the density is introduced as a new variable, with the real possibility to modify ad hoc their physical properties. In the indirect foaming process carried out in a furnace, simultaneous mass, momentum and energy transfer between three phases, ...
COMSOL Multiphysics® Simulation of Energy Conversion and Storage Concepts Based on Oxide Crystals - new
C. Cherkouk, M. Zschornak, J. Hanzig, M. Nentwich, F. Meutzner, M. Urena, T. Leisegang, D. C. Meyer
Institute of Experimental Physics, Technische Universität Bergakademie, Freiberg, Germany
Fraunhofer-Technologiezentrum, Freiberg, Germany
A mathematical model based on a finite element method (FEM) is presented as an initial approach for a system converting waste heat energy into chemical energy. This system consists of a pyroelectric LiNbO3 plate placed into a cylinder which undergoes a laminar water flow with an appropriate periodic heat source. It solves the heat transfer equation in non-isothermal flow, where the density of ...