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Investigation on Ash Slagging Characteristics during Combustion of Biomass Pellets and Effect of Additives
(Journal article; Peer reviewed, 2017)This study reports a systematic investigation into ash slagging behavior during combustion of barley straw and barley husk pellets with or without additives in a residential pellet burner. The slagging tendencies of the ... -
Investigation on CO2 Ground-coupled Heat Pumping System with Ejector
(Master thesis, 2015)After the proposal of CO2 transcritical cycle in 1980s by Professor Gustav Lorentz, researchers have looked into theoretical and experimental research, as well as commercial system development to improve transcritical ... -
Investigation on heat recovery strategies from low temperature food processing plants: Energy analysis and system comparison
(Chapter, 2021)Industrial food processing plants often have significant thermal requirements at both low and high temperatures. These plants can produce a variety of products including frozen, chilled and grilled/steamed foodstuff, ... -
Investigation on the energy performance of using air-source heat pump to charge PCM storage tank
(Peer reviewed; Journal article, 2020)Nowadays air-source heat pumps are widely used to collect heat from ambient air, which can reduce operating cost and protect environment when compared with fossil-based heating systems. To increase the flexibility of heat ... -
Investigation on the performance of fluted tube-in-tube gas cooler in transcritical CO2 heat pump water heater
(Peer reviewed; Journal article, 2021)The utilization of fluted inner tube in tube-in-tube heat exchangers is an effective way to improve the heat transfer performance. Based on the segmented model, the performance of a fluted tube-in-tube gas cooler (FTGC) ... -
Investigations of a harmonic oscillatory flow
(Master thesis, 2017)Power companies are on a daily basis making operational strategies to operate power plants in an efficient and good way. To do this must all impacts and challenges with influence be comprised in the analytical work. In a ... -
Investigations of Compressible Turbulent Flow in a High-Head Francis Turbine
(Journal article; Peer reviewed, 2017)Dynamic stability of the high-head Francis turbines is one of the challenging problems. Unsteady rotor–stator interaction (RSI) develops dynamic stresses and leads to crack in the blades. In a high-head turbine, vaneless ... -
Investigations of Copper Contamination in Lithium-Ion Batteries Using Non-intrusive Analytical Methods
(Bachelor thesis, 2024)Denne bacheloroppgaven tar for seg oppdagelse av kontaminasjon i litiumionbatterier under de første syklusene. Hovedmålet med oppgaven er å finne ut om analysemetoder som differensiell spenningsanalyse (DVA) eller inkrementell ... -
Investigations of Different Control Strategies for Heat Pump Systems in a Residential nZEB in the Nordic Climate
(Chapter, 2017)The paper investigates different control strategies for a ground source heat pump of a Norwegian residential zero emission building, with detailed dynamic simulations (here using IDA ICE). These rule-based controls aim at ... -
Investigations of Rake and Rib Structures in Sand Traps to Prevent Sediment Transport in Hydropower Plants
(Journal article; Peer reviewed, 2021)In order to increase the lifespan of hydraulic turbines in hydropower plants, it is necessary to minimize damages caused by sediment erosion. One solution is to reduce the amount of sediments by improving the design of ... -
Investigations of the extended Eddy Dissipation Concept formulation for weakly turbulent and slow chemistry flames
(Peer reviewed; Journal article, 2023)Recent extensions of the Eddy Dissipation Concept (EDC) are investigated with the purpose of analysing the importance of model limiters to the EDC performance when predicting Moderate and Intense Low-oxygen Dilution (MILD) ... -
Investigations of unsteady pressure loading in a Francis turbine during variable-speed operation
(Journal article; Peer reviewed, 2017)Current study was aimed to investigate the unsteady pressure loading in a model Francis turbine under variable-speed configurations. Focus was to investigate the time-dependent characteristic frequencies and the pressure ... -
Investigations on mixture preparation for two phase adiabatic pressure drop of R134a flowing in 5 mm diameter channel
(Journal article; Peer reviewed, 2017)The article presents detailed two-phase adiabatic pressure drops data for refrigerant R134a. Study cases have been set for a mass flux varying from 200 to 400 kg/m2 s, at the saturation temperature of 19.4 ◦C. Obtained ... -
Investigations on the Sustainable Resource Use of Swiss Timber
(Peer reviewed; Journal article, 2021)In Switzerland, the advantages of timber buildings for the climate are broadly discussed. In the following paper, a comparative sustainability assessment of four building alternatives is presented. Especially the contribution ... -
(Invited) Novel Fuel Production Based on Sonochemistry and Sonoelectrochemistry
(Journal article; Peer reviewed, 2019)Sonochemistry has been used in many applications where it is employed to improve both catalytic and synthetic processes; whereas, sonoelectrochemistry has been used in various studies including organic syntheses, environmental ... -
Ionomer content optimization in nickel-iron-based anodes with and without ceria for anion exchange membrane water electrolysis
(Journal article; Peer reviewed, 2021)Hydrogen production from anion exchange membrane water electrolysis (AEMWE) is an efficient cost-effective solution to renewable energy storage. Contrary to proton exchange membrane (PEM) electrolysis, AEMWE requires further ... -
Iron Ore Price Prediction Based on Multiple Linear Regression Model
(Journal article, 2023)The fluctuation of iron ore prices is one of the most important factors affecting policy. Therefore, the accurate prediction of iron ore prices has significant value in analysis and judgment regarding future changes in ... -
Irreversibility of combustion, heat and mass transfer
(Master thesis, 2011)Combustion is by far the most commonly used technology for energy conversion. The analysis of entropy generation and exergy loss is normally used to optimize thermal energy technologies such as gas turbines. The loss of ... -
Is a net life cycle balance for energy and materials achievable for a zero emission single-family building in Norway?
(Journal article; Peer reviewed, 2018)In this study, the objective is to redesign a previous concept for a single-family Zero greenhouse gas Emission Building (ZEB). The concept is redesigned based on comparing greenhouse gas (GHG) emission loads and compensation ... -
Is It Possible to Supply Norwegian Apartment Blocks with 4th Generation District Heating?
(Journal article; Peer reviewed, 2019)Direct electricity is widely used for heating purposes in Norway, leading to significant strain on the electricity grid during the heating season. Conversion to 4th generation district heating (4GDH) is an effective method ...