Search for dissertations about: "efficient process"

Showing result 1 - 5 of 1381 swedish dissertations containing the words efficient process.

  1. 1. Biomass conversion through syngas-based biorefineries thermochemical process integration opportunities

    University dissertation from Umeå : Umeå universitet

    Author : Katarina Åberg; Umeå universitet.; [2017]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass; biorefinery; thermochemical conversion; torrefaction; slow pyrolysis; gasification; process integration; carbon negativity;

    Abstract : The replacement of fossil resources through renewable alternatives is one way to mitigate global climate change. Biomass is the only renewable source of carbon available for replacing oil as a refining feedstock. Therefore, it needs to be utilized not just as a fuel but for both biochemical and thermochemical conversion through biorefining. READ MORE

  2. 2. Bio-SNG from Thermal Gasification - Process Synthesis, Integration and Performance

    University dissertation from Chalmers University of Technology

    Author : Stefan Heyne; Chalmers tekniska högskola.; Chalmers University of Technology.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; process integration; synthetic natural gas; biomass; gasification; energy systems; performance indicators; process modelling;

    Abstract : Biomethane or synthetic natural gas (Bio-SNG) produced from gasified renewable woody biomass is a promising option for replacing fossil natural gas. The complete interchangeability with natural gas in all its conventional applications such as in the power generation, transportation and chemical industry sector is of particular interest. READ MORE

  3. 3. Simulations of Evaporation Plants in Kraft Pulp Mills: Including Lignin Extraction and Use of Excess Heat

    University dissertation from Chalmers University of Technology

    Author : Marcus R. Olsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2009]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kemisk process- och produktionsteknik; Chemical process and manufacturing engineering; Energy-efficient evaporation; simulation; heat integration; process integration; excess heat; lignin extraction; energy saving; modelling; kraft pulp mill.;

    Abstract : In this thesis, evaporation plants at kraft pulp mills are simulated with the purpose of making them more energy efficient. The work is important since energy saving is assumed to be one of the major solutions for handling the world's energy demand in the future. READ MORE

  4. 4. Methods for improving performance of process planning for CNC machining an approach based on surveys and analytical models

    University dissertation from Göteborg : Chalmers tekniska högskola

    Author : Staffan Anderberg; Högskolan Väst.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Manufacturing and materials engineering; Produktions- och materialteknik; Process planning; CNC machining; metal cutting; performance; process capability; environment; energy; Produktionsteknik; Manufacturing engineering;

    Abstract : Process planning as an enabler of competiveness is often overlooked, but being one of the principal function in the product realisation flow it holds a key role by combining both product and production requirements into a production concept with respect to the current manufacturing system. As such the capability of process planning to a large extent dictates production cost, lead times, product quality etc. READ MORE

  5. 5. Design of Business Process Model Repositories Requirements, Semantic Annotation Model and Relationship Meta-model

    University dissertation from Stockholm : Department of Computer and Systems Sciences, Stockholm University

    Author : Mturi Elias; Stockholms universitet.; [2015]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; business process; business process model; business process repository; semantic annotation; data- och systemvetenskap; Computer and Systems Sciences;

    Abstract : Business process management is fast becoming one of the most important approaches for designing contemporary organizations and information systems. A critical component of business process management is business process modelling. READ MORE