Sökning: "exergy"

Visar resultat 1 - 5 av 56 avhandlingar innehållade ordet exergy.

  1. 1. Exergy Evaluation of Engine Operations : Combustion Process to Exhaust Flow

    Författare :Beichuan Hong; Andreas Cronhjort; Mihai Mihaescu; Sundar Rajan Krishnan; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Thermal efficiency; Exergy analysis; Marine engine; Lean-burn combustion; Pulsating flow measurement; Pitot tube; Sensitivity analysis; Energy and exergy losses; Termisk verkningsgrad; Exergianalys; Marinmotor; Magertbränningsförbränning; Pulserande flödesmätning; Pitotrör; Känslighetsanalys; Energiförluster och exergiförluster; Machine Design; Maskinkonstruktion; Energiteknik; Energy Technology;

    Sammanfattning : Transitioning the transport sector to clean energy sources is crucial for mitigating greenhouse gas emissions and achieving carbon neutrality. A collaborative solution, combining both electric vehicles and combustion engines using renewable fuels, may prove more effective than competitive ones. LÄS MER

  3. 2. Energy, entropy and exergy in the atmosphere

    Författare :Sten Karlsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Exergy; fluid mixture; physical resources use; general circulation model; dissipative structure; renewable energy;

    Sammanfattning : .... LÄS MER

  4. 3. Aerothermodynamics and exergy analysis in turbocharger radial turbine

    Författare :Shyang Maw Lim; Mihai Mihaescu; Anders Dahlkild; Ricardo Martinez-Botas; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; pulsatile exhaust flow; turbine; turbocharger; Detached Eddy Simulation; heat transfer; exergy; Engineering Mechanics; Teknisk mekanik;

    Sammanfattning : Coupling of turbomachine to reciprocating automotive engine in turbocharging leads to complex fluid flow and thermal characteristics in the turbine. Some undesirable characteristics include heat transfer, flow pulsation and secondary flow due to the complex geometry of the upstream exhaust manifold. LÄS MER

  5. 4. A Rational Exergy Management Model to Curb CO2 Emissions in the Exergy-Aware Built Environments of the Future

    Författare :Siir Kilkis; Folke Björk; Bahram Moshfegh; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Exergy; CO2 emissions; built environment; buildings; energy system; scenario-based analysis; mitigation strategies; net-zero; LEED; energy transition; transition management; SRA - Energy; SRA - Energi;

    Sammanfattning : This thesis puts forth the means of a strategic approach to address a persistent problem in the energy system and in this way, to transition the built environment to a future state that is more exergy-aware to curb CO2 emissions. Such a vision is made possible by the six-fold contributions of the research work: I) An analytical model is developed, which for the first time, formulates the CO2 emissions that are compounded in the energy system as a function of the systematic failures to match the supply and demand of exergy. LÄS MER

  7. 5. Exergy Analysis in Buildings : A complementary approach to energy analysis

    Författare :Marco Molinari; Folke Björk; Gudni Jóhannesson; Ivo Martinac; KTH; []
    Nyckelord :Exergy; Energy; Building systems performance; Built environment.;

    Sammanfattning : Though mandatory to be pursued, improved energy efficiency is not the only target to reach. The quality of energy has to be assessed as well. Most of the overall energy use in residential building is for low temperature heat, i.e. LÄS MER