Search for dissertations about: "RNG"

Showing result 1 - 5 of 7 swedish dissertations containing the word RNG.

  1. 1. Numerical Investigation of Turbulent Fluid Flow and Heat Transfer in Complex Ducts

    University dissertation from Division of Heat Transfer, Lund Institute of Technology

    Author : Masoud Rokni; Lunds universitet.; Lund University.; [1998]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SED; WET; GGDH; RNG; RSM; EASM; Low-Reynolds; Non-linear k-e; Heat transfer; Turbulent; Complex ducts; Secondary flows; Temperature invariance; Energy research; Energiforskning;

    Abstract : Popular Abstract in Swedish Numeriska methoder har används för att beräkna turbulent strömning och värmeöverföring i komplexa kanaler med olika turbulens modeller.... READ MORE

  2. 2. A Ventilation Strategy Based on Confluent Jets An Experimental and Numerical Study

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Setareh Janbakhsh; Linköpings universitet.; Linköpings universitet.; Högskolan i Gävle.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Multiple interacting jets; round jets; confluent jets; wall jet; ventilation strategy; air distribution system; air supply device; ventilation performance; thermal comfort; energy-saving potential; measurement; numerical predictions; RANS turbulence models; renormalization group RNG k– ε ; realizable Re k– ε ; and shear stress transport SST k– ω ;

    Abstract : This study presents air distribution systems that are based on confluent jets; this system can be of interest for the establishment of indoor environments, to fulfill the goals of indoor climate and energy-efficient usage. The main objective of this study is to provide deeper understanding of the flow field development of a supply device that is designed based on wall confluent jets and to investigate the ventilation performance by experimental and numerical methods. READ MORE

  3. 3. Study of the reduction of particle emissions and borate black liquor gasification in bioenergy systems

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Sylvain Leduc; [2004]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energiteknik; Energy Engineering;

    Abstract : The use of biofuel for district heating and for electricity generation is expected to increase consistently in the coming decades due to the neutral impacts on the greenhouse gases. Domestic wood boilers are first studied in this thesis. The particle emissions from these boilers are high and encounter health problems. READ MORE

  4. 4. Experimental and numerical investigations of a ventilation strategy – impinging jet ventilation for an office environment

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Huijuan Chen; Högskolan i Gävle.; Linköpings universitet.; Linköpings universitet.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Impinging jet ventilation; room air distribution; thermal comfort; ventilation performance; turbulence modelling; CFD;

    Abstract : A well-functioning, energy-efficient ventilation system is of vital importance to offices, not only to provide the kind of comfortable, healthy indoor environment necessary for the well-being and productive work performance of occupants, but also to reduce energy use in buildings and the associated impact of CO2 emissions on the environment. To achieve these goals impinging jet ventilation has been developed as an innovative ventilation concept. READ MORE

  5. 5. Experimental and Numerical Investigations of Confluent Round Jets

    University dissertation from Linköping : Linköping University Electronic Press

    Author : Klas Svensson; Linköpings universitet.; Linköpings universitet.; [2015]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Confluent jets; Multiple jet array; Jet interactions; Confluent Core Zone CCZ ; Particle Image Velocimetry PIV ; Laser Doppler Velocimetry LDA ; Computational Fluid Dynamics CFD ; Response Surface Methodology;

    Abstract : Unconfined multiple interacting confluent round jets are interesting from a purely scientific point of view, as interaction between neighboring jets brings additional complexity to the flow field. Unconfined confluent round jets also exist in various engineering applications, such as ventilation supply devices, sewage disposal systems, combustion burners, chemical mixing or chimney stacks. READ MORE