Sökning: "specific heat"

Visar resultat 16 - 20 av 462 avhandlingar innehållade orden specific heat.

1. 16. Borehole heat store design optimization

   Författare :Bo Nordell; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Vattenteknik; Water Resources Engineering;

   Sammanfattning : Seasonal heat storage, which is used to balance the supply of and demand for heat, e.g. in district heating networks, is necessary for the large-scale utilization of solar heat. The aim of this thesis was to study and develop seasonal heat storage to a point where it, if possible, would be an option in Swedish heating systems. LÄS MER

3. 17. Thermodynamic characterization of superconducting and magnetic materials using nanocalorimetry

   Författare :Donato Campanini; Andreas Rydh; Christoph Meingast; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanocalorimetry; Superconductivity; Magnetism; MEMS; Specific heat; Thermodynamics; Physics; fysik;

   Sammanfattning : Measurement of specific heat is a powerful technique for the investigation of novel materials. Superconducting and magnetic systems, in particular, can be thoroughly characterized by studying their electronic contribution to the specific heat. LÄS MER

4. 18. Investigation of Some Heat Transfer Surfaces for Gas Turbine Recuperators

   Författare :Esa Utriainen; Värmeöverföring; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; trapezoidal; corrugated undulated; cross wavy; cross corrugated; chevron; pressure drop; heat transfer; microturbine; Recuperator; gas turbine; plate-fin; Technological sciences; Teknik; Thermal engineering; applied thermodynamics; Termisk teknik; termodynamik; Gases; fluid dynamics; plasmas; Gaser; fluiddynamik; plasma;

   Sammanfattning : A part of this thesis has been devoted to present general recuperator technology such as available gas turbine recuperator types, applications where recuperators are utilized, recuperator materials etc. An investigation of some compact and highly efficient heat transfer surfaces, for intended use in gas turbine recuperators, include the following surfaces: · Cross Wavy (CW) primary surface. LÄS MER

5. 19. Calorimetry under extreme conditions

   Författare :Neha Kondedan; Andreas Rydh; Ali Elshaari; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanocalorimetry; Diamond anvil cell; Specific heat; Thermometry; Quasicrystals; Solid State Physics; fasta tillståndets fysik;

   Sammanfattning : This licentiate thesis presents developments of nanocalorimetry systems tailored for use under extreme conditions such as high pressure, intense magnetic fields, and low temperature. Nanocalorimetry is a powerful approach to study strongly correlated systems like superconductors, heavy fermions, and quantum materials with non-trivial magnetic or electronic properties, materials with emergent magnetic orders, as well as quasicrystals. LÄS MER

7. 20. Membrane-based nanocalorimetry for low temperature studies with high resolution and absolute accuracy

   Författare :Stella Tagliati; Andreas Rydh; Vladimir M. Krasnov; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nanocalorimetry; specific heat; membrane-based calorimeter; AC steady state; frequency dependence; thermal link conductance; thermal relaxation; GeAu thermometer; numerical simulations; fysik; Physics;

   Sammanfattning : A differential, membrane-based nanocalorimeter has been designed and constructed for thermal studies of mesoscopic samples at low temperatures. The calorimeter is intended for sample masses from mg to sub-μg and a broad temperature range from above room temperature down to the sub-K region. LÄS MER