Fraunhofer Chalmers Research Centre for Industrial Mathematics
Chalmers Publication LibraryNot a member yet
70439 research outputs found
Sort by
DIGITAL KOMMUNIKATION INOM BYGGSEKTORN - En studie i datormedierad kommunikation för organisationer inom byggsektorn med fördjupning i delvis och helt virtuella team
No full text
Kvinnligt ledarskap i en mansdominerad bransch - Faktorer som utgör hinder för kvinnliga ledare i ett byggkonsultbolag
No full text
A Home Away From Home - Designing a patient hotel that promotes health in an urban context
No full textOptimering av kylanordning för behandling med hypertermi
No full textAn optimization algorithm for a cooling system, created for cancer treatment with hyperthermia
was developed. An optimization problem restricted by a partial differential equation —
the time independent heat equation -u = f — was formulated over the variables describing
the geometry of two cooling channels. The heat equation was solved in a domain
that
represents part of the hyperthermia applicator. The objective functional to minimize is the
average temperature of the patients skin,
R
1
u dS where 1 is the part of
that represents
the patients skin. This algorithm was implemented with a gradient projection method and a
finite difference solver. The algorithm was also verified, both numerically and experimentally
with good results. The results demonstrate a functioning optimization algorithm, but with
limitations. With the simplifications made we found a method to optimize cooling channels
for an improved cooling. However, the algorithm needs to be further developed to better
reflect reality and possible treatment cases should be investigated. With a fully functioning
optimization algorithm without limitations, hyperthermia treatment can be used with reduced
risk for burns
Protection of AC microgrids with inverter interfaced renewable energy sources using differential relays
No full textDesign methods for high thermal efficiency load bearing inserts used in composite sandwich structures
No full textComposite sandwich panels with foam cores are gaining importance in the automotive industries due to their lightweight design. The panels are subjected to localized loads with the help of inserts. These load carrying inserts cause an adverse effect such as stress development, thermal losses etc., in the panels. In this thesis, a special engineering design is considered to
help improve the stresses developed in the core and reduces the thermal losses in the sandwich panel. The panel is assumed to be perfectly bonded to transfer the loads. Thin face sheets with different materials such as aluminum, carbon fibre (CF) and glass fibre (GF) along with different thick foam core material such as extruded polystyrene (XPS), Polyethylene terephthalate (PET) and Polyvinyl chloride (PVC) are investigated. An analytical model to calculate the thermal conductivity across the sandwich panel with insert is developed using
Fourier heat transfer law. An FE model of the sandwich panel with insert is also developed to analyze the strength and heat flux for different geometry within the panel. Finally, an optimization toolbox is developed based on the constraints and objective
