Sökning: "effektiv värmeledningsförmåga"

Hittade 4 uppsatser innehållade orden effektiv värmeledningsförmåga.

1. 1. Numerical Modelling of a Packed Bed Thermal Energy Storage for Applications in a Carnot Battery : KTH Thesis Report

   Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

   Författare :Gabriel Juul; [2023]
   Nyckelord :Thermal energy storage; Carnot battery; sand; packed bed; granular medium; porous medium; effective medium technique; effective thermal conductivity; paramedic study; 3D model; COMSOL; numerical modelling; Lagring av värmeenergi; Carnot-batteri; sand; packad bädd; granulärt medium; poröst medium; effektiv mediumteknik; effektiv värmeledningsförmåga; parametrisk studie; 3D-modell; COMSOL; numerisk modellering;

   Sammanfattning : This thesis explores the heat transfer characteristics of a packed bed thermal energy storage device through the development of a 3D model in COMSOL Multiphysics. The model is based on a laboratory-scale device consisting of an aluminum box filled with sand, which acts as the thermal storage medium. LÄS MER

3. 2. Simulation of Hardening of the MahanaKhon Tower Mat Foundation

   Master-uppsats, KTH/Betongbyggnad

   Författare :Zakaria Kazi-tani; [2019]
   Nyckelord :Hydration; MahanaKhon tower; mat foundation; young concrete; temperature development; thermal stresses; cracking; fly ash; finite element analysis; COMSOL Multiphysics; Hydratation; MahanaKhon tower; bottenplatta; ung betong; temperaturutveckling; termiska spänningar; sprickbildning; flygaska; finita elementanalys; COMSOL Multiphysics;

   Sammanfattning : Cement hydration is the result of a series of simultaneous chemical reactions occurring during the production of concrete. An excessive amount of heat is generated, which consequently may give rise to thermal stresses and cause early age cracks in concrete that may affect its structural integrity, and load bearing capacity. LÄS MER

4. 3. Alternativa etanolbaserade köldbärare med korrosionsinhibitorer i bergvärmesystem

   Kandidat-uppsats, KTH/Energiteknik

   Författare :Marcus Ohlin; [2015]
   Nyckelord :;

   Sammanfattning : Ground source heat pumps are very popular in the Nordic countries. The method of exchanging heat with the ground is based on the principle that a secondary fluid is circulating through a U-pipe borehole heat exchanger inserted into energy wells. LÄS MER

5. 4. Alternativa etanolbaserade köldbärare med korrosionsinhibitorer i bergvärmesystem

   Kandidat-uppsats, KTH/Energiteknik

   Författare :Isac Gustafsson; [2015]
   Nyckelord :;

   Sammanfattning : Ground source heat pumps are very popular in the Nordic countries. The method of exchanging heat with the ground is based on the principle that a secondary fluid is circulating through a U-pipe borehole heat exchanger inserted into energy wells. LÄS MER