Search for dissertations about: "cooling"

Showing result 21 - 25 of 951 swedish dissertations containing the word cooling.

  2. 21. Optimization of ground-coupled systems for heating and cooling of buildings

    Author : Jüri Naumov; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; free-cooling; brine temperature; heat pump; ground system; heating demand; storage; building load; cooling demand; Borehole;

    Abstract : The use of ground-coupled systems in commercial buildings offers economic as well as environmental advantages. When both heating and cooling is required, a ground-coupled system can function both as a heat source and a heat sink. At the same time, it can also serve as a short term as well as a seasonal storage. READ MORE

  4. 22. Urban Climate and Air Pollution in Ouagadougou, Burkina Faso

    Author : Jenny Lindén; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Sub-Saharan Africa; Sahel; semi arid; nocturnal cooling; urban vegetation; evening evaporative cooling; cooling rate; atmospheric stability; thermal wind; carbon monoxide; particulate matter; road dust; exposure differences;

    Abstract : ABSTRACT Africa has recently been singled out by UN Habitat as the fastest urbanizing continent in the world. The most extreme case was found in the Sahelian city of Ouagadougou, Burkina Faso, where the population is expected to almost double over the next ten years. READ MORE

  5. 23. On Film Cooling of Turbine Guide Vanes : From Experiments and CFD-Simulations to Correlation Development

    Author : Hossein Nadali Najafabadi; Matts Karlsson; Esa Utriainen; Mats Kinell; Valery Chernoray; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Film Cooling; Gas Turbine; Correlation; CFD; Cylindrical holes; Fan-shaped Holes;

    Abstract : To achieve high thermal efficiency in modern gas turbines, the turbine-inlet temperature has to be increased. In response to such requisites and to prevent thermal failure of the components exposed to hot gas streams, the use of different cooling techniques, including film cooling, is essential. READ MORE

  6. 24. Modeling and Performance of Gas Turbine Cycles with Various Means of Blade Cooling

    Author : Kristin Jordal; Kraftverksteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fluid dynamics; Gases; termodynamik; Termisk teknik; applied thermodynamics; Thermal engineering; blade cost; HAT cycle; humid air; model validation; blade cooling modeling; thermodynamic simulations; blade cooling; Gas turbine; plasmas; Gaser; fluiddynamik; plasma; Mechanical engineering; hydraulics; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik;

    Abstract : A method for simulating the cooled gas turbine is demonstrated. Based on equations and other knowledge found in the literature, a first-law thermodynamic, non-dimensional model is established and implemented in the equation-solving, programmable software IPSEpro. READ MORE

  7. 25. Cooling Strategies for Wave Power Conversion Systems

    Author : Antoine Baudoin; Cecilia Boström; Anne Blavette; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wave power; power conversion system; thermal management; power elctronics; passive cooling; natural convection.;

    Abstract : The Division for Electricity of Uppsala University is developing a wave power concept. The energy of the ocean waves is harvested with wave energy converters, consisting of one buoy and one linear generator. The units are connected in a submerged substation. The mechanical design is kept as simple as possible to ensure reliability. READ MORE