Essays about: "power breakdown"

Showing result 36 - 40 of 43 essays containing the words power breakdown.

  1. 36. Feasibility & design of PV-T polymer solar collector for real estate households in Addis Ababa

    University essay from KTH/Tillämpad termodynamik och kylteknik

    Author : Seyfe Hagos; [2011]
    Keywords : ;

    Abstract : A combined application of PV and polymer thermal solar collector (PVT) of solar energy for residential electricity and thermal demand can be harnessed sustainably with effective means at a time where long sun duration and most consistent solar irradiation throughout the year is available, in place like Addis Ababa, Ethiopia.Due to frequent power shedding though out the country which Addis Ababa is part of problem, because of the energy demand in the country is increasing and a source of electricity is merely dependent on hydro power of rain which droughts are occurring frequently affecting the generation of the grid. READ MORE

  3. 37. A comparative theoretical and empirical analysis of three methods for workplace studies

    University essay from Institutionen för kommunikation och information

    Author : Charlott Sellberg; [2011]
    Keywords : Human-Computer Interaction; Workplace studies; Method comparison; Contextual Design; Determining Information Flow Breakdown; Capturing Semi-Automated Decision-Making; Dental Informatics.;

    Abstract : Workplace studies in Human-Computer Interaction (HCI) is a research field that has expanded in an explosive way during the recent years. Today there is a wide range of theoretical approaches and methods to choose from, which makes it problematic to make methodological choices both in research and system design. READ MORE

  4. 38. Investigation of Fast High Voltage PDC Measurement based on a Vacuum Reed-switch

    University essay from KTH/Elektroteknisk teori och konstruktion

    Author : Zeeshan Talib; [2011]
    Keywords : step voltage; polarization and depolarization current; vacuum reed switch.;

    Abstract : The diagnostic technique, polarization and depolarization current (PDC) is useful for insulation testing. It requires applying a DC step voltage to the test sample and measuring the current. To measure fast PDC phenomena a fast step is needed. One way of applying a fast high voltage step is to use power electronic switches. READ MORE

  5. 39. SiC Homoepitaxial Growth at High Rate by Chloride-based CVD

    University essay from Linköpings universitet; Institutionen för fysik, kemi och biologi; Halvledarmaterial

    Author : Yuan-Chih Lin; [2010]
    Keywords : silicon carbide; chloride-based CVD; homoepitaxial growth; tungsten incorporation;

    Abstract : SiC is an attractive material since it has remarkable properties. For several years efforts have been put primarily in electronic applications. High power and high frequency devices can be fabricated on SiC due to its wide band gap, high breakdown field and high thermal conductivity. READ MORE

  6. 40. TORQUE ESTIMATION OF DOUBLE FED INDUCTION GENERATOR USING A DYNAMIC MODEL AND MEASURED DATA

    University essay from Lunds universitet/Industriell elektroteknik och automation

    Author : Kristofer Nilsson; [2010]
    Keywords : Technology and Engineering;

    Abstract : A big challenge in the Wind Power industry is the breakdown of gearboxes. To increase the knowledge about Wind Power and gearbox breakdowns Vattenfall has done measurements on both the mechanical and electrical system of a wind power turbine e.g. during full load and partial load. READ MORE