Sökning: "Thermodynamic database"

Visar resultat 1 - 5 av 12 uppsatser innehållade orden Thermodynamic database.

1. 1. Hydrogen storage systems : Methodology and model development for hydrogen storage systems performance evaluation based on a transient thermodynamic approach

   Master-uppsats, Mälardalens universitet/Akademin för ekonomi, samhälle och teknik

   Författare :Kreshnik Margaritari; [2023]
   Nyckelord :Hydrogen; Hydrogen storage system; Hydrogen filling process; Hydrogen storage system operation; Hydrogen storage system design; Hydrogen fast filling; Hydrogen tank modelling;

   Sammanfattning : The overall performance of a hydrogen storage system can be affected by various parameters, such as operation and design parameters, but also by the state of the hydrogen contained inside the storage tanks. In this work, a methodology is developed to evaluate the state of the hydrogen during the filling process and its impact on the overall system performance under variable operation conditions and design parameters. LÄS MER

3. 2. Thermodynamic modelling of the copper-zinc-tin ternary system : A study towards lead-free brass

   Master-uppsats, KTH/Materialvetenskap

   Författare :Caterina Radogna; [2023]
   Nyckelord :Brass-based alloys; Lead-free brass; Calphad; Thermo-Calc; Thermodynamic description; Mässingsbaserade legeringar; Blyfri mässing; Calphad; Thermo-Calc; Termodynamisk beskrivning;

   Sammanfattning : Lead (Pb) is frequently used as an alloying element in brass to enhance machinability and castability. However, this element poses a significant risk to human health and the environment. The 2021 revision of the Drinking Water Directive imposed stricter limits on Pb content in brass, encouraging the development of lead-free brass. LÄS MER

4. 3. Investigation of new refrigerants for a large-scale heat pump and evaluation of system performance

   Master-uppsats, Linköpings universitet/Mekanisk värmeteori och strömningslära

   Författare :Hanna Grahn; Matilda Eriksson; [2023]
   Nyckelord :Large-scale heat pump; refrigerant; COP;

   Sammanfattning : Heat production accounted in 2021 for 50 % of the energy end use globally, where a strongconnection to fossil sources still exists. Large-scale electrical heat pumps can therefore have akey role in the energy system to enable a decreased reliance on fossil fuels and at the same timecontribute to stable system when incorporating more intermittent renewable sources. LÄS MER

5. 4. Thermodynamic Modelling and Experimental Investigation of Tungsten Partitioning in Nickel Based Alloys

   Master-uppsats, KTH/Materialvetenskap

   Författare :Joshva Kumpati; [2018]
   Nyckelord :Calphad; Tungsten partitioning; Nickel based alloys; Thermo-Calc; Thermodynamic database; Ni-W binary; Calphad; volframpartitionering; Nickelbaslegering; Termo-Calc; Termodynamisk databas; Ni-W;

   Sammanfattning : Thermo-Calc software AB develops high quality thermodynamic and kinetic databases to predict and simulate accurately multi-component phase behaviour in complex systems. One problem with their Ni-based alloys and superalloy solutions database (TCNI8) is poor description of tungsten partitioning for multi-component nickel based alloys. LÄS MER

7. 5. Thermodynamic modelling ofmartensite start temperature in commercial steels

   Master-uppsats, KTH/Materialvetenskap

   Författare :Arun Kumar Gulapura Hanumantharaju; [2018]
   Nyckelord :Martensite start temperature; Thermodynamic modelling; Austenite grain size; Epsilon martensite; CALPHAD;

   Sammanfattning : Firstly, an existing thermodynamic model for the predicting of martensite start temperature of commercial steels has been improved to include more elements such as N, Si, V, Mo, Nb, W, Ti, Al, Cu, Co, B, P and S and their corresponding composition ranges for Martensitic transformation. The predicting ability of the existing model is improved considerably by critical assessment of different binary and ternary systems i. LÄS MER