Sökning: "heat conductance"
Visar resultat 1 - 5 av 16 avhandlingar innehållade orden heat conductance.
1. Phase dependent heat transport in superconducting junctions with scattering theory
Sammanfattning : The operation of nanoscale devices at low temperatures is highly sensitive to heating effects. This motivates current research on controlling heat currents in these devices. LÄS MER
2. Membrane-based nanocalorimetry for low temperature studies with high resolution and absolute accuracy
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
3. Thermal Conductivity of Hygroscopic Foams Based on Cellulose Nanomaterials
Sammanfattning : Biobased super-insulating materials could mitigate climate change by minimizing the use of petroleum-based materials, creating artificial carbon sinks and minimizing the energy needed to maintain pleasant interior conditions. Cellulose nanomaterials (CNM) produced from abundantly available cellulose sources constitute versatile, highly anisotropic raw materials with tunable surface chemistry and high strength. LÄS MER
4. Retarded sorption in wood : experimental study, analyses and modeling
Sammanfattning : Models of moisture flow processes in wood are normally based on a Fickian approach. In many instances, there are considerable discrepancies between modelling and experimental results. It is shown in this thesis that a major cause for these discrepancies is a so-called retarded sorption which is not accounted for in conventional theories. LÄS MER
5. Thermal Modelling of Water-Based Floor Heating Systems - supply temperature optimisation and self-regulating effects
Sammanfattning : Low temperature water-based concrete embedded floor heating systems are studied. The utilisation of low quality heat sources is facilitated by low temperature heating. Theoretical models which describe the transient thermal floor heating operation constitute the basis for the analysis. LÄS MER