Search for dissertations about: "enhanced heat transfer"

Showing result 1 - 5 of 51 swedish dissertations containing the words enhanced heat transfer.

2. 1. Pool Boiling on Structured Surfaces: Heat Transfer and Critical Heat Flux : Experiments and Mechanistic Modelling

   Author : Zhen Cao; NanoLund: Centre for Nanoscience; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pool boiling; heat transfer; critical heat flux; bubble dynamics; surface modification;

   Abstract : In this thesis, pool boiling heat transfer was experimentally studied on structured surfaces with dielectric liquids (HFE-7200, NOVEC-649, FC-72), organic liquids (Acetone, Pentane) and deionized water.In the first step, nanoparticle coatings on copper surfaces were prepared by an electrophoretic deposition method, with Cu-Zn nanoparticles (100 nm) and Cu nanoparticles (150 nm). READ MORE

4. 2. Reduction of heat transfer and heat load in internal combustion engines

   Author : Joop Somhorst; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; efficiency; TBC; thermal barrier coating; surface roughness; engine; heat transfer; emissions; alumina; zirconia;

   Abstract : Thermal insulation of the combustion chamber in an engine has great potential to reduce fuel consumption and CO2 emissions. Research on thermal barrier coatings (TBC) has been performed since the early eighties to address this potential. READ MORE

5. 3. Thermal and Hydraulic Performance of Enhanced Rectangular Tubes for Compact Heat Exchangers

   Author : Carl-Olof Olsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; LDV; heat exchanger; enhanced heat transfer; radiator; smoke visualization; pressure drop; secondary flow;

   Abstract : The thermal and hydraulic performance of rib-roughened, dimpled and offset strip fin tubes has been investigated experimentally. Results from measurements on commercially manufactured tubes have shown that rib-roughened tubes have best potential for heat transfer enhancement with moderate pressure drop increase. READ MORE

6. 4. Engineering nanomaterials with enhanced functionality

   Author : Shanghua Li; Mamoun Muhammed; Saad Elraghy; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; PMMA-ZnO; nanocomposite; hybrid material; in situ sol-gel polymerization; quantum dots; UV-shielding; Nanostructured surface; Pool boiling; Heat transfer coefficient; Bubble nucleation; Enhanced boiling; dendritic branch; Electrodeposition; Nanoengineering; Materials chemistry; Materialkemi;

   Abstract : This thesis deals with the engineering of novel nanomaterials, particularly nanocomposites and nanostructured surfaces with enhanced functionalities. The study includes two parts; in the first part, an in situ sol-gel polymerization approach is used for the synthesis of polymer-inorganic hybrid material and its exceptional transparent UV-shielding effect has been investigated. READ MORE

7. 5. Graphene Heat Spreaders for Electronics Thermal Management Applications

   Author : Yong Zhang; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; test platform; heat spreader.; transfer; Graphene; thermal management;

   Abstract : Graphene shows great potential for applications in electronics due to its outstanding physical properties such as extremely high electron mobility, high thermal conductivity, high Young’s modulus and very high surface-to-volume ratio. Among these attractive properties, the high intrinsic thermal conductivity is a critical advantage for the application of graphene in electronics to alleviate heat dissipation problems. READ MORE