Sökning: "boreholes"

Visar resultat 21 - 25 av 124 uppsatser innehållade ordet boreholes.

  1. 21. Understoppning av bergbultsbricka : En undersökning om möjlig uteslutning av arbetsmomentet

    Kandidat-uppsats, KTH/Byggteknik och design

    Författare :Elin Blomster; Sara Litton Fredriksson; [2021]
    Nyckelord :underfilling; rebar bolt; rock bolt; rock reinforcement; rock bolt plate; hot galvanized; epoxy-painted; corrosion protection system; understoppning; underpaltning; paltning; kamstålsbult; bergbult; bergförstärkning; bergbultbricka; varmförzinkad; epoxilackerad; rostskyddssystem;

    Sammanfattning : Vid byggnation av tunnlar och bergrum används bergförstärkning för att exempelvis säkra mot nedfallande lösa block och uppsprickning av berg. En vanlig förekommande förstärkning är bergbultar i kombination med sprutbetong. Vid installation av bultar borras hål i bergväggen som sedan fylls med cementbruk. LÄS MER

  3. 22. Energilösningar för en energismart stadsdel

    Master-uppsats, Lunds universitet/Institutionen för energivetenskaper

    Författare :Pontus Dahl; Nicholas Näslund Sandmark; [2021]
    Nyckelord :Energismarta städer; netto-noll energianvändning; energilösningar; solceller; PV; solfångare; PT; solhybrider; PVT; geoenergisystem; bergvärme; borrhålslager; värmepump; Polysun; EED; Technology and Engineering;

    Sammanfattning : The aim of this master thesis is to conclude how the energy systems of smart cities can be designed to achieve an annual net-zero energy consumption. The study investigated different techniques that can be used for producing and storing energy locally. This was implemented on a planned residential project located in Veberöd, south of Scania. LÄS MER

  4. 23. Carbon Storage in Quaternary Deposits of the Circum-Arctic Permafrost Region

    Master-uppsats, Stockholms universitet/Institutionen för naturgeografi

    Författare :Annegret Udke; [2021]
    Nyckelord :Quaternary deposits; Carbon storage; Permafrost region; Organic Geochemistry; Sedimentology; Vulnerability; Thermokarst;

    Sammanfattning : Rapid warming in northern latitudes will lead to permafrost thaw and subsequent carbon remobilisa­tion and release to the atmosphere. To incorporate the permafrost carbon climate feedback in globalEarth System Models, it is of importance to know the carbon stored in the circum­Arctic permafrostregion as accurate and precise as possible. LÄS MER

  5. 24. Performance Evaluation of Ground Heating and Cooling Systems - Long-term performance measurements of two case buildings

    Master-uppsats, Lunds universitet/Avdelningen för Energi och byggnadsdesign; Lunds universitet/Institutionen för arkitektur och byggd miljö

    Författare :Hao Liu; Hongyi Zhang; [2020]
    Nyckelord :Ground source heat pump GSHP ; System performance; Long-term monitoring; Geothermal; Borehole heat exchangers; Office building; Uncertainty analysis; Deep Green Cooling; Free cooling; Heating; Cooling; Technology and Engineering;

    Sammanfattning : Geothermal energy is one of the oldest and most sustainable energy sources and has been used for thousands of years. The temperature of the ground at shallow depth is fairly constant, above the air temperature in winter and lower than the ambient temperature in summer. LÄS MER

  7. 25. Techno-economic assessment of CO2 refrigeration systems with geothermal integration : a field measurements and modelling analysis

    Master-uppsats, KTH/Energisystem

    Författare :Fabio Giunta; [2020]
    Nyckelord :CO2 Refrigeration; Supermarkets; Heat Recovery; Geothermal Storage; Energy Efficiency; Boreholes; Techno-Economic Assessment;

    Sammanfattning : Several CO2 transcritical booster systems in supermarkets use the potential of integrating geothermal storage, enabling subcooling during warm climate conditions as well as being a heat source during cold climate conditions. First of all, field measurements of one of these systems located in Sweden were analysed with particular focus on the heat-recovery performance. LÄS MER