Sökning: "SPIS 5"

Hittade 4 uppsatser innehållade orden SPIS 5.

  1. 1. Evaluating energy efficiency and emissions of charred biomass used as a fuel for household cooking in rural Kenya

    Uppsats för yrkesexamina på avancerad nivå, SLU/Dept. of Energy and Technology

    Författare :Achour Nemer; [2015]
    Nyckelord :gasifier; charcoal; biochar; cooking fuel; improved cook stove;

    Sammanfattning : In sub-Saharan Africa a large share of the energy use utilize biomass as a fuel. In some countries more than 90 percent of the energy use is biomass. This energy is primarily used for cooking, heating and drying. LÄS MER

  3. 2. Numerical simulation of Rosetta Langmuir Probe

    L3-uppsats, Rymd- och plasmafysik

    Författare :Fredrik Johansson; [2013]
    Nyckelord :SPIS; Rosetta; Langmuir Probe; Simulation; IRF;

    Sammanfattning : By modelling and simulating the ESA spacecraft Rosetta in a plasma with solar wind parameters, and simultaneously simulating a particle detection experiment of Langmuir probe voltage sweep type using the ESA open source software SPIS Science, we investigate the features of Rosetta’s envi- ronment in the solar wind and the e↵ect of photoemission from the space- craft on the measurements made by the Langmuir Probe instrument on board Rosetta. For a 10 V positively charged spacecraft and Maxwellian distributed photoelectron emission with photoelectron temperature, Tf = 2 eV in a plasma of typical 1 AU solar wind parameters: ne = 5 ⇥ 106 m3, vSW = 4 ⇥ 105 m/s, Te = 12 eV, Tion = 5 eV, we detect a floating potential of 6. LÄS MER

  4. 3. Rosetta Langmuir probe performance

    Master-uppsats, Institutionen för fysik och astronomi

    Författare :Fredrik Johansson; [2013]
    Nyckelord :Rosetta; SPIS; SPIS 5; Langmuir; Probe; Plasma; Probe sweep; Potential; Simulation; PIC; IRF; Swedish Institute of Space Physics; ESA;

    Sammanfattning : Several Langmuir probe voltage sweeps by a model of the ESA spacecraft Rosetta was simulated in a plasma with solar wind parameters using the ESA open source software SPIS 5. The simulations were carried out to in- vestigate the features of the spacecraft’s environment in the solar wind and the effect of photoemission from the spacecraft surface on the measurements made by the Langmuir probes on board Rosetta. LÄS MER

  5. 4. Spårväg i Helsingborg - En idéstudie och förprojektering av två spårvägslinjer mellan Trädgårdsgatan och Hälsovägen

    Kandidat-uppsats, Lunds universitet/Utbildningar i Helsingborg

    Författare :Johan Persson; Mattis Mathisen; [2012]
    Nyckelord :spårväg; helsingborg; spårvägstrafik; förstudie; förprojektering; Technology and Engineering;

    Sammanfattning : This thesis is a combined conceptual study and preliminary design of two study options for a future tramway line between Trädgårdsgatan and Hälsovägen in Helsingborg. This line is of great interest since it’s centrally located and regarded as a problematic stretch of narrow streets, heavy traffic and steep gradients. LÄS MER