Sökning: "Helgi Fridriksson"

Hittade 3 avhandlingar innehållade orden Helgi Fridriksson.

  1. 1. Combustion Bowl Heat Transfer Analysis in Diesel and PPC Engines

    Författare :Helgi Fridriksson; Värmeöverföring; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Heat Transfer; CFD; Internal Combustion Engine; Diesel; PPC;

    Sammanfattning : This thesis concerns a numerical investigation on heat transfer in internal combustion engines, with the aim of increasing engine efficiency. The efficiency gains are to be extracted from reduced heat transfer losses, by increasing the knowledge on how the heat transfer process is affected by various hardware and operational parameters in the engine. LÄS MER

  2. 2. On CFD-Analysis of Heat Transfer of a Heavy-Duty Diesel Engine

    Författare :Helgi Fridriksson; Värmeöverföring; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD; Heat Transfer; Diesel Engine;

    Sammanfattning : In this work, a heavy-duty diesel engine was studied by employing CFD simulations on a closed volume engine segment. These simulations were used to evaluate both the effects from certain parameters on the wall heat transfer, and to examine how reduction of heat transfer would effect the engine performance and emission levels. LÄS MER

  3. 3. Learning processes in an inter-organizational context : A study of krAft project

    Författare :Helgi-Valur Fridriksson; Runólfur Smári Steinthorsson; Högskolan i Jönköping; []
    Nyckelord :;

    Sammanfattning : The purpose of this thesis is to understand learning in an inter-organizational learning project, focusing on the enablers and obstacles of learning. The study shows that traditionally research on organizational learning has focused on intra-organizational learning, paying attention to learning within focal organizations. LÄS MER