Search for dissertations about: "Low Exergy system"

Showing result 1 - 5 of 20 swedish dissertations containing the words Low Exergy system.

  2. 1. Design and evaluation of stationary polymer electrolyte fuel cell systems

    Author : Cecilia Wallmark; KTH; []
    Keywords : Small-scale; stationary; fuel cell system; polymer electrolyte fuel cell; PEFC system; reformer; thermodynamic modelling; pinch technology; exergy analyses; system configuration; test facility; experiments; application; simulation; installation; ener;

    Abstract : The objectives of this doctoral thesis are to give a basisincluding methods for the development of stationary polymerelectrolyte fuel cell (PEFC) systems for combined heat andpower production. Moreover, the objectives include identifyingprerequisites, requirements and possibilities for PEFC systemsproducing heat and power for buildings in Sweden. READ MORE

  4. 2. Approaches to energy efficient building development : studying under Chinese contexts

    Author : Zhenhong Gu; Ronald Wennersten; Per Heiselberg; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy efficiency; China; Passive House; Low Exergy system; Built Environmental Assessment; LCA; Swedish housing; Hammarby Sjöstad; Eco-village; Game theory; System theory; Soft Systems Methodology; Environmental engineering; Miljöteknik;

    Abstract : This thesis presents a general description of approaches to energy efficient building development under Chinese contexts. The purpose of the work is to discuss how Chinese building development can be approved from an energy saving perspective. Building development is a complicated process that relates to many stakeholders’ interests. READ MORE

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

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

    Abstract : 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. READ MORE

  6. 4. Efficiency and Mixing Analysis of EGR-Systems for Diesel Engines

    Author : Simon Reifarth; Hans-Erik Ångström; Nils Tillmark; Andreas Cronhjort; José Galindo; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; EGR; Exergy; mixing; pulsating flow; HP-EGR; LP-EGR; high-pressure EGR; low-pressure EGR;

    Abstract : The reduction of fuel consumption and the reduction of toxic emissions are the main goals of research and development in the area of internal combustion engines. The use of exhaust gas recirculation (EGR) to come further in that direction is today an established method for diesel engines. READ MORE

  7. 5. Efficiency Improvements in Waste-to-Energy Combustion Processes : Method Development and Evaluation

    Author : Eboh Francis Chinweuba; Simon Harvey; Högskolan i Borås; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Solid waste; exergy; entropy; higher heating value; improvement potential; waste-to-energy plant; efficiency improvement; cost evaluation; simulation; modelling; Resource Recovery; Resursåtervinning;

    Abstract : is the energy recovery method. The electrical efficiency of this technology, however, is generally low when compared with other solid fuel-fired combustion plants as a result of low steam properties. Furthermore, there is lack of efficient methods to evaluate the performance of this system. READ MORE