E. Johansson, J. Acuña, B. Palm
Royal Institute of Technology KTH, Stockholm, Sweden
A field of connected boreholes can be used both for cooling, heating and storage purposes. The boreholes transfer heat to or from the ground, which over time changes the temperature in the ground. It is important that the borehole field is properly sized and evaluated before the construction. This study presents results from borehole field evaluations of inclined boreholes used for cooling ...
Study of the Process, Design, and Operating Parameters Effect on the Efficiency of the Process Mill - new
A. K. Farouk
Department of Mathematics & Natural Science, University of Stavanger, Sandnes, Rogaland, Norway
This study is to investigate the velocity pattern and the velocity magnitude of the cuttings that is being processed in the process mill as a result of the rotating hammers. The process mill consists of a horizontal cylindrical shell equipped with renewable liners and rotating hammers for milling of drill cuttings. An F.E model of the process mill was constructed using dimensions similar to ...
M. R. Naik
Nitte Meenakshi Institute of Technology, Bengaluru, Karnataka, India
In a modern IC design, the capability of predicting the temperature profile is critically important as well as cooling and related thermal problems are the principal challenges. To address these challenges, thermal analysis must be embedded within IC synthesis. This paper presents thermal analysis of the FCBGA chip with a 4mm×4mm×0.3mm silicon die. The silicon die dissipates heat flux of ...
K. Wegman , X. Sun ,
 Department of Mechanical and Aerospace Engineering, Ohio State University, Columbus, OH, USA
In this experiment, the performance of a Printed Circuit Heat Exchanger (PCHE) was studied using COMSOL Multiphysics® software. PCHEs are diffusion bonded heat exchangers containing semicircular, chemically etched flow paths. Helium was used as the working fluid on both the hot and cold sides. A simplified model was used in the simulation, and the results were compared to experimental results. ...
P. Namy , A. Oury , M. Youbi-Idrissi ,
 SIMTEC, Grenoble, France
 AIR LIQUIDE, Jouy en Josas, France
Heat transfer inside a refrigerated truck is a key phenomenon that governs the temperature inside the truck and the regulation of the cooling system. Up to now, a lot of experimental studies ([Tso et al., 02]) have been carried out to assess the effect of opening the door and to minimize the external heat transfer with fan air curtain. Together with AIR LIQUIDE, the world leader in gases, ...
A. van Schijndel
Eindhoven University of Technology, Eindhoven, Netherlands
Benchmarks are an important tool to verify computational models. In the research area of building physics, the so-called HAMSTAD (Heat, Air and Moisture Standardization) project is a very well known benchmark for the testing of simulation tools. In this paper we evaluate the use of COMSOL with its multiphysics capabilities regarding this benchmark. In comparing the results with the benchmark, it ...
B.W. Reed, T.B. LaGrange, G.H. Campbell, and N.D. Browning[1,2]
Lawrence Livermore National Laboratory, Livermore, CA, USA
University of California Davis, Davis, CA, USA
The Dynamic Transmission Electron Microscope (DTEM) at Lawrence Livermore National Laboratory is a unique instrument able to capture images of fast-evolving microstructure with exposure times of only 15 ns. This is more than six orders of magnitude faster than conventional in situ electron microscopy and has enabled new insights into phase transformations, chemical reactions, and materials ...
L. Kowalski, L.C. Muñoz, M.D. Pumar, and V.J. Serres
Universidad Politécnica de Cataluña, Departamento de Ingeniería Electrónica, Barcelona, Spain
The purpose of this paper is to describe numerical electro-thermal simulations of the REMS wind sensor unit and the results obtained by using COMSOL Multiphysics. This device is a hot-film anemometer for 2D wind measurements, which does not have movable parts and is based on the air stream forced heat convection to the environment. This wind sensor works as a thermo-electrical transducer where ...
N. Williams Portal, M. van Aarle, and J. van Schijndel
Department of Civil and Environmental Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
Department of Architecture, Building and Planning, Technical University of Eindhoven, Eindhoven, The Netherlands
This paper includes the implementation and comparison of two types of moisture potentials for the combined transport: the natural logarithmic of the suction pressure (LPc) and the relative humidity (RH). The finite element method has been utilized to evaluate coupled 1D thermal and hygric transport by means of COMSOL Multiphysics. The combined transport mechanisms were described by the ...
Coupling Heat Transfer in Heat Pipe Arrays with Subsurface Porous Media Flow for Long Time Predictions of Solar Rechargeable Geothermal Systems
P. Oberdorfer, R. Hu, M. Azizur Rahman, E. Holzbecher, M. Sauter, P. Pärisch
Applied Geology, Geoscience Centre, University of Göttingen, Göttingen, Germany
Institute for Solar Energy Research Hameln/Emmerthal (ISFH), Emmerthal, Germany
An increased share of renewable energies is regarded as an integral part of a strategy towards a sustainable future. With regard to the heat supply sector this may be achieved using solar thermal collectors or heat pump systems with borehole heat exchangers. During the last years solar thermal and geothermal systems have generally been installed separately. Now, several proposals are discussed ...