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 ...
A Theoretical Model for the Control of Color Degradation and Microbial Spoilage Occurring in Food Convective Drying
S. Curcio, M. Aversa
University of Calabria, Department of Engineering Modeling, Rende, Cosenza, Italy
The aim of this work was the development of a predictive model aimed at identifying a proper control strategy of food drying process. In particular, it was intended to determine the effect of operating conditions both on the color degradation, chosen as a reference quality parameter, and on the microbial spoilage occurring during potatoes drying. A transport model, accounting for the ...
A. Travis, K. Ekici, J. Freels
The University of Tennessee, Knoxville, TN, USA
Oak Ridge National Laboratory, Oak Ridge, TN, USA
A model utilizing interdimensional variable coupling is presented for simulating the thermal hydraulic interactions of the High Flux Isotope Reactor (HFIR) core at Oak Ridge National Laboratory (ORNL). The model’s domain consists of a three-dimensional fuel plate and a two-dimensional coolant channel slice. In simplifying the coolant channel, the computational cost and solution time are both ...
V. Bruyere , C. Touvrey , P. Namy ,
 SIMTEC, Grenoble, France
 CEA DAM, Valduc, Is-sur-Tille, France
In order to predict the residual mechanical state of assemblies during pulsed laser welding, mechanical and metallurgical behaviors of materials need to be precisely characterized. Based on experimental data and analyses , a numerical model is developed in COMSOL Multiphysics® software to take into account the predominant effects identified for TA6V. First of all, the metallurgic behavior ...
E. Bozelie, P. Bruins
Saxion University Enschede, Enschede, The Netherlands
In heating upgrades, most attention is paid to the boiler. When upgrading to HR++-boilers (eff of 107%) however, difficulties may occur since the high efficiency boilers are designed for water temperatures around 40°C, while the old radiators are designed for water temperatures higher than 60°C. The resulting mismatch may lead to reduced performance, a larger carbon footprint and increased ...
M. Silva, T. Ring
Department of Chemical Engineering, University of Utah, Salt Lake City, UT, USA
For combustion simulations, the wall temperature and heat transfer is an important piece of information. Coal combustion systems typically have walls that are initially a cast ceramic, but, with time, slag is deposited on the surface and coal and soot are incorporated into the slag. It is this slag coated ceramic that determines the rate at which heat is transferred from the wall combustion ...
A. Pellegrini, A. Beucci, and F. Costa
ALTRAN Italia, Pisa, Italy
In this paper a methodology for calculating the infrared signature of complex objects is presented. The transient thermal analysis allows us to evaluate the temperature distribution on the investigated object, pointing out which parts tend to be warmer. These temperature values are handled in the post processing phase in order to evaluate the zero range radiance distribution and the radiance of ...
D. Guo, A. McGaughey, G. Fedder, M. Lee, and S. Yao
Carnegie Mellon University
Micro-scale devices based on the Stirling cycle are an attractive choice for chip- and board-level electronics. A new Stirling cycle micro-refrigeration system composed of arrays of silicon MEMS cooling elements has been designed. COMSOL is used to evaluate the thermal performance of the system. Simulation of compressible flow and heat transfer with a large deformed mesh has been successfully ...
P. Kumar , S. Kalra, A. Marwaha
Department of Electronics and Communication Engineering, Sant Longowal Institute of Engineering Technology Longowal, Punjab, India
The optimized design of a waveguide applicator has been proposed for superficial microwave hyperthermia using COMSOL Multiphysics 3.5a. In microwave hyperthermia cancer treatment body tissue is exposed to high temperatures using external and internal heating devices. Non-Invasive or external hyperthermia is used to treat tumors that are in or just below the skin (superficial). Non-invasive ...
Oscillatory Thermal Response Test (OTRT) – An Advanced Method for Gaining Thermal Properties of the Subsurface
Georg-August-Universität Göttingen, Göttingen, Germany
Thermal Response Tests (TRTs) are the state-of-the-art method to obtain the thermal conductivity of the subsurface in the nearby ambience of a borehole heat exchanger (BHE). The results of TRTs are used to determine the necessary depth of the borehole and to make long time predictions about the potential of heat extraction. For a TRT, a constant heat load is injected into the subsurface and the ...