Sökning: "DTH"

Visar resultat 1 - 5 av 17 uppsatser innehållade ordet DTH.

1. 1. Life Cycle Assessment of Borehole Thermal Energy Storage

   Master-uppsats, KTH/Hållbar utveckling, miljövetenskap och teknik

   Författare :Saga Karlsson; [2022]
   Nyckelord :;

   Sammanfattning : Borehole thermal energy storage (BTES) is a technology used to store energy between seasons. It could therefore be a solution to the seasonal mismatch between the use and production of (renewable) energy, which can be used to increase energy efficiency and reduce greenhouse gas emissions. LÄS MER

3. 2. Påldrivning: Jämförelse mellan luft- och vattendriven borrning : En utredning av jämförelser avseende slitage, logistik och driftkostnader

   Kandidat-uppsats, KTH/Byggteknik och design

   Författare :Andreas Bengtsson; Pierre Bodin; [2022]
   Nyckelord :: percussion hammer; pilot; DTH; pile driving; wear; drill rig; casing; piston; check valve; water-handling; sedimentation; : sänkhammare; pilot; DTH; pålning; slitage; borrigg; foderrör; kolv; backventil; vattenhantering; sedimentering;

   Sammanfattning : Skanska Grundläggning in Region Special wishes to gain an increased understanding of the extent to which it differs in the wear of percussion hammers and pilot drill crowns, depending on which driving medium is used in down-the-hole drilling, as well as logistical and economic aspects depending on the chosen method. Down-the-hole drilling means that the hammer works down in the borehole and forms one of the components at the far end of the drill string together with a drill bit. LÄS MER

4. 3. Forecasting with deep temporal hierarchies : A novel way for forecasting with temporal hierarchies based on deep learning models

   Master-uppsats, Högskolan i Skövde/Institutionen för informationsteknologi

   Författare :Filotas Theodosiou; [2021]
   Nyckelord :Forecasting; temporal hierarchies; forecast reconciliation; hierarchical forecasting; machine learning; deep learning;

   Sammanfattning : Temporal hierarchies are being increasingly used for forecasting purposes over the past years. They have been shown to produce accurate and coherent forecasts which are beneficial for enterprises. Reconciling forecasts of different aggregation levels to achieve coherence, supports aligned decisions between different organizational levels. LÄS MER

5. 4. Undersökning av hur nitrokarburering påverkar kolvar från Epiroc

   Uppsats för yrkesexamina på grundnivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

   Författare :Filip Hobro; [2020]
   Nyckelord :Metallurgy; Heat treatment; Nitrocarburization; Down The Hole Drilling; DTH; Metallurgi; Värmebehandling; Nitrokarburering; Sänkborr; DTH; Formförändring;

   Sammanfattning : The degree project has been done at the quality department at Epiroc in Fagersta aspart of the continuous quality control work that takes place there. In the project, it hasbeen investigated how a piston in a down-the-hole hammer is affected by the heattreatment process called nitrocarburization which is performed to give the material anincrease in surface hardness. LÄS MER

7. 5. Grundförstärkning med pålar i berg : I befintlig konstruktion med begränsat utrymme

   Kandidat-uppsats, KTH/Byggteknik och design

   Författare :Madicken Höglund; Marcus Larsson; [2020]
   Nyckelord :Steel pipe; steel core pile; waterproofing; pile foundation; down-the-hole DTH drill.;

   Sammanfattning : This study has been done in order to examine which type of pile, pile driving- and waterproofing methodsare most suited for an existing building. A building that will undergo an extensive reinforcement of itsfoundation. LÄS MER