Search for dissertations about: "termodynamik"

Showing result 1 - 5 of 128 swedish dissertations containing the word termodynamik.

2. 1. Conceptual metaphors in learning and teaching entropy : adopting a cognitive semantic approach in science education research

   Author : Fredrik Jeppsson; Helge Strömdahl; Tamer Amin; Roland Kjellander; David Hammer; Linköpings universitet; []
   Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Science education; thermodynamics; semantics; conceptual metaphors; Naturvetenskapernas didaktik; termodynamik; entropi; semantik; begreppsliga metaforer;

   Abstract : Over the last 20 years there has been an extensive amount of research on science learning conducted from a “knowledge-in-pieces” or “resources” perspective. One of the main goals of that research has been to identify and characterize available cognitive knowledge resources that can be productive components of scientific understanding. READ MORE

4. 2. Thermodynamics and Kinetics in Metallurgical Processes - with a Special Focus on Bubble Dynamics

   Author : Yu Liu; Mikael Ersson; Pär Göran Jönsson; Bjoern Glaser; Joaquín B. Ordieres-Meré; Yogeshwar Sahai; Birgit Palm; Ville-Valtteri Visuri; KTH; []
   Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ladle; EAF; gas bubbling; physical modeling; mathematical modeling; thermodynamics; Skänkmetallurgi; EAF; gasbubblor; experimentell modellering; matematisk modellering; termodynamik; Materials Science and Engineering; Teknisk materialvetenskap; Metallurgical process science; Metallurgisk processvetenskap;

   Abstract : Gas stirring is commonly used in the steelmaking processes to reinforce chemical reactions, kinetic transfer, and inclusion removal, etc. This dissertation concentrates on multiphase flows with gas bubbling to study fluid dynamics and thermodynamics in metallurgical processes. READ MORE

5. 3. Analogical reasoning in science education : - connections to semantics and scientific modelling in thermodynamics

   Author : Jesper Haglund; Helge Strömdahl; Konrad Schönborn; Roland Kjellander; Kevin Dunbar; Linköpings universitet; []
   Keywords : SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; science education; thermodynamics; analogical reasoning; semantics; scientific modelling; naturvetenskapsdidaktik; termodynamik; analogiskt tänkande; semantik; vetenskaplig modellering;

   Abstract : Analogiskt tänkande är en central kognitiv förmåga som vi använder i vardagslivet, såväl som i mer formella sammanhang, såsom i forskning och undervisning. Föreliggande avhandling behandlar hur analogier och analogiskt tänkande, uppmärksamhet på semantik och förståelse för vetenskaplig modellering kan användas för att hantera utmaningar i naturvetenskapsundervisningen, särskilt inom området termodynamik. READ MORE

6. 4. Numerical Simulations of Cooling Concepts Related to Gas Turbine Combustors

   Author : Andreas Abdon; Värmeöverföring; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Motors and propulsion systems; plasma; combustor; gas turbine; cooling; numerical simulations; turbulence; ribs; impingement; Gases; fluid dynamics; plasmas; fluiddynamik; Gaser; Motorer; framdrivningssystem; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik;

   Abstract : The mean by which a gas turbine combustor is cooled is of major importance for the efficiency and emission performance of the machine. The trends of increasing top cycle temperature and leaner combustion have also been accompanied by a need of efficient use of the cooling air. READ MORE

7. 5. On the Analysis and Fault-Diagnosis Tools for Small-Scale Heat and Power Plants

   Author : Jaime Arriagada; Kraftverksteknik; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik; genetic algorithms; neural networks; fault diagnosis; maintenance; availability; reliability; energy analysis; combined heat and power; Methods and tools; small scale;

   Abstract : The deregulation of the electricity market drives utilities and independent power producers to operate heat and power plants as profit centers. In order to keep the economic margins on the credit side, the preferred measures have been to improve the electrical efficiency through changes in the hardware and boost the overall efficiency through e.g. READ MORE