Browsing Institutt for energi og prosessteknikk by Title
Now showing items 3807-3826 of 4200
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Thermal Conductivity and Compaction of GDL-MPL Interfacial Composite Material
(Journal article; Peer reviewed, 2018)The microporous layer (MPL) and the gas diffusion layer (GDL) in a polymer electrolyte membrane (PEM) fuel cell assembly are often treated as separate layers in the literature. However, there exists a considerable third ... -
Thermal conductivity and internal temperature profiles of Li-ion secondary batteries
(Journal article, 2017)In this paper we report the thermal conductivity for several battery components. Materials were obtained from several electrode- and separator suppliers, and some were extracted from commercial batteries. We measured with ... -
Thermal conductivity and temperature profiles in carbon electrodes for supercapacitors
(Journal article, 2014)The thermal conductivity of supercapacitor film electrodes composed of activated carbon (AC), AC with 15 mass% multi-walled carbon nanotubes (MWCNTs), AC with 15 mass% onion-like carbon (OLC), and only OLC, all mixed with ... -
Thermal Conductivity in PEMFC PTLs with Different Gas Content and Corresponding simple PEMFC Internal Temperature Profiles
(Master thesis, 2017)More than 50 % of the PEMFC (Polymer Electrolyte Membrane Fuel Cell) energy is released as heat. The aim for this thesis was to contribute to the understanding of the management of that heat. The heat management in the ... -
Thermal conductivity in the three layered regions of MPL coated PTL for the PEM fuel cell
(Journal article; Peer reviewed, 2015)Thermal conductivity of the polymer electrolyte membrane fuel cell (PEMFC) components has achieved increased attention over the past decade. Despite the fact that the PEMFC itself (between the gas flow plates) is less than ... -
Thermal Conductivity, Heat Sources and Temperature Profiles of Li-ion Batteries
(Journal article; Peer reviewed, 2014)In this paper we report the thermal conductivity of several commercial and non-commercial Li-ion secondary battery electrode materials with and without electrolytesolvents. We also measure the Tafel potential, the ohmic ... -
Thermal conversion of biomass with emphasis on product distribution, reaction kinetics and sulfur abatement.
(Doktoravhandlinger ved NTNU, 1503-8181; 2009:123, Doctoral thesis, 2009)Most of the work performed in this study has concentrated on the thermal decomposition of biomass. This was done because to the simple fact that biomass is mainly composed of volatiles that evaporates prior to the gasification ... -
Thermal corrections to the Casimir effect
(Journal article; Peer reviewed, 2006)The Casimir effect, reflecting quantum vacuum fluctuations in the electromagnetic field in a region with material boundaries, has been studied both theoretically and experimentally since 1948. The forces between ... -
Thermal Decomposition Kinetics of Wood and Bark and their Torrefied Products
(Journal article; Peer reviewed, 2017)The pyrolysis kinetics of Norway spruce, its bark, and their torrefied products was studied. Thermogravimetry (TGA) was employed with linear and stepwise heating programs. Altogether 36 TGA experiments were evaluated ... -
Thermal efficiency of coal-fired power plants: From theoretical to practical assessments
(Journal article; Peer reviewed, 2015)The improvement in thermal efficiency for coal to power processes is increasingly important due to concerns on CO2 emissions. This paper presents a systematic study on direct combustion coal to power processes with respect ... -
Thermal energy recovery and storage for a hydrogen fuel cell and battery driven cruise ship
(Master thesis, 2022)Den maritime sektoren møter strengere krav i forbindelse med klimagassutslipp basert på fremtidsplaner om nullutslippshavner langs Norges kyst innen 2026 og restriksjoner pålagt av Den internasjonale sjøfartsorganisasjonen ... -
Thermal energy storage for environmental energy supply
(Master thesis, 2012)The increasing energy consumption in the building sector enforces development in the field. One aims to cut the link between energy production and consumption, in order for environmental energy supply more of the demand ... -
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 ...