Blar i Institutt for energi og prosessteknikk på tittel
Viser treff 3819-3838 av 4200
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Thermal Energy Storage with PCM for Refrigerated Sea Water System of Fishing Vessels
(Peer reviewed; Journal article, 2021)This paper investigates thermal storage integration with the refrigerated seawater (RSW) system of a fishing vessel. Four different scenarios were investigated, including ice in tanks, two design modifications in chilling ... -
Thermal Gradients and Thermal Conductivity in PEM Fuel Cells, Compared to Li-Ion Batteries and Super Capacitors
(Journal article; Peer reviewed, 2018)The PEMFC has been developed into a very effective energy converter. That is, the PEMFC offers high power at the same energy efficiency range. This is because the cell potential remains constant while current density ... -
Thermal Gradients with Sintered Solid State Electrolytes in Lithium-Ion Batteries
(Journal article; Peer reviewed, 2020)The electrolyte is one of the three essential constituents of a Lithium-Ion battery (LiB) inaddition to the anode and cathode. During increasingly high power and high current charging anddischarging, the requirement for ... -
Thermal losses from hydronic heating systems in highly-insulated residential buildings
(Master thesis, 2016)Many of the building concepts for current and future-efficient buildings are based on highly-insulated envelopes, such passive houses, zero emission buildings or nearly-zero energy buildings (nZEB). As the building is ... -
Thermal Management Systems for Compact Electrical Machines
(Master thesis, 2020)Elektrifisering av luftfarten stiller høyere krav til elektromotorene som skal drifte hybride eller helelektriske fly. De må være kompakte, sikre og ha lav vekt. Dette krever mer av utviklerne innenfor alle ingeniøraspekter. En ... -
Thermal Properties of Semi-solid State Lithium-ion Batteries
(Bachelor thesis, 2022)Formålet med denne bacheloroppgaven er å undersøke termisk ledningsevne, spesifikk varmekapasitet og varmegenerering i semi-solid state litium-ion batterier (LIB), og sammenligne disse med de termiske egenskapene til ... -
Thermal Solar Energy: Comparison between direct and indirect systems
(Master thesis, 2020)World energy consumption grows day by day, and so does the environmental concern. Consequently, the use of renewable energies, such as solar energy, is very important to meet the energy demand without damaging the planet. ... -
Thermal transport in lithium-ion batteries: The effect of degradation
(Peer reviewed; Journal article, 2023)In this work, we report thermal conductivities of pristine and degraded electrodes, from commercial lithium-ion batteries. The thermal conductivities were measured with and without electrolyte solvent and at different ... -
Thermal two-phase flow with a phase-field method
(Journal article; Peer reviewed, 2018)Phase field methods have become of great interest for the simulation of droplet and bubble dynamics, moving free interfaces and more recently phase change phenomena. One example is the Navier–Stokes–Korteweg (NSK) equations. ... -
Thermal zoning during winter in super-insulated residential buildings
(Master thesis, 2017)In the work of reducing the energy consumption of buildings, the passive house concept has been developed as a possible solution. These buildings have a low energy need for space-heating and is therefore often equipped ... -
Thermal-Hydraulic Analysis of a Pneumatic Resonating Device
(Master thesis, 2012)Resonator AS is developing a hammer drilling system suitable for oil and geothermal drilling. The nature of the device involves high speed linear motion at high frequencies. As a result of this, the gas springs used in ... -
Thermo-Mechanical Exergy of a Substance Below Environmental Pressure
(Journal article; Peer reviewed, 2024)In this work, we demonstrate why classical thermo-mechanical exergy functions are incorrect below the environmental reference pressure, since they result in too small or even negative values. We present new derivations for ... -
Thermo-physical properties of anisotropic materials - A comparison between experiments and numerical calculations
(Master thesis, 2014)Hydrogen has the potential to become a replacement for fossil energy carriers in the future. Thermophysical properties like thermal conductivity and specific heat will be very important when determining the internal heat ... -
Thermoacoustic modes of intrinsic and acoustic origin and their interplay with exceptional points
(Peer reviewed; Journal article, 2020)We propose a general classification of all the modes of a given thermoacoustic system into two sets: one of acoustic origin and one of intrinsic thermoacoustic (ITA) origin. To do this, the definition of intrinsic modes, ... -
Thermoacoustic oscillations in a can-annular model combustor with asymmetries in the can-to-can coupling
(Peer reviewed; Journal article, 2022)Can-annular combustors are equipped with a set of nominally identical cans, circumferentially arranged around the shaft. Adjacent cans are coupled acoustically via a small gap at the downstream end, where the circular ... -
Thermocapillary instability as a mechanism for film boiling collapse
(Journal article; Peer reviewed, 2018)We construct a model to investigate the interfacial stability of film boiling, and discover that instability of very thin vapour films and subsequent large interface superheating is only possible if thermocapillary ... -
Thermodynamic analysis of CO2 capture processes for power plants
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:217, Doctoral thesis, 2014)This thesis work presents an evaluation of various processes for reducing CO2 emissions from natural-gas-fired combined cycle (NGCC) power plants. The scope of the thesis is to focus mainly on post-combustion chemical ... -
Thermodynamic analysis of different methanation reactors for biogas upgrading
(Peer reviewed; Journal article, 2020)Biomethane production from biogas can be increased by methanation of carbon dioxide with hydrogen through the Sabatier reaction. In this work, the performance of the methanation process is investigated under isothermal and ... -
Thermodynamic analysis of rotary pressure exchanger and ejectors for CO2 refrigeration system
(Journal article; Peer reviewed, 2024)Natural refrigerant CO2 has become a viable choice for refrigeration units for land-based and offshore applications due to its environment-friendly nature and compactness. The CO2 transcritical cycle allows operating in ... -
Thermodynamic aspects of of entropic cosmology with viscosity
(Peer reviewed; Journal article, 2021)We describe the evolution of the early and late universe from thermodynamic considerations, using the generalized nonextensive Tsallis entropy with a variable exponent. A new element in our analysis is the inclusion of a ...