English
norskBlar i forfatter "Boström, Tobias"
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Carbon Nanotube Spectrally Selective Solar Absorbers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015)The use of multi-walled carbon nanotubes (MWCNTs) as spectrally selective solar thermal absorbers (SSA) in solar thermal collectors is presented in this paper. CNT layers were coated by electrophoretic deposition (EPD) on aluminum substrates. Stable aqueous CNT suspensions consisted of multi-walled CNTs, DI water and surfactant was used for EPD. The deposited samples were heat treated in a tube ... -
Electrophoretically deposited carbon nanotube spectrally selective solar absorbers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2015-11-11)Three types of carbon nanotubes(CNT) have been investigated regarding their suitability as spectrally selective solar thermal absorbers.The CNT coatings were electrophoretically deposited on aluminum substrates using kinetically stable CNT aqueous suspensions, of which two CNT aqueous suspensions (N-CNT and P-CNT suspensions) were prepared as part of this study and the third one (T-CNT suspension) ... -
Estimating solar irradiation in the Arctic
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-08-22)Solar radiation data plays an important role in pre-feasibility studies of solar electricity and/or thermal system installations. Measured solar radiation data is scarcely available due to the high cost of installing and maintaining high quality solar radiation sensors (pyranometers). Indirect measured radiation data received from geostationary satellites is unreliable at latitudes above 60 degrees ... -
Evaluating CM-SAF solar radiation CLARA-A1 and CLARA-A2 datasets in Scandinavia
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-26)Estimating/retrieving solar radiation through satellite-based remote sensing provides larger spatial coverage compared to other methods. Accurate estimates of incoming solar radiation is important when planning new solar energy installations. In addition, these estimates are also used in climate studies. Geostationary satellites are ideal for estimating solar radiation but cannot be used for high ... -
Explaining doping in material research (Hf substitution in ZnO films) by directly quantifying the van der Waals force
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-02-04)Non-monotonic behavior has been observed in the optoelectronic properties of ZnO thin films as doped with Hf (HZO). Here we propose that two competing mechanisms are responsible for such behaviour. Specifically, we propose that provided two crystal orientations dominate film growth, only one of them might be responsible for direct Hf substitution. Nonmonotonic behaviour is expected at once by ... -
Light and photosynthetic microalgae: A review of cellular- and molecular-scale optical processes
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-09-08)Light and its interaction with microalgae are essential concerns in the context of microalgae studies. The optical properties of microalgae have a great impact on the remote sensing ocean color, underwater light distribution and biomass accumulation, to mention some areas. A deep understanding of these processes requires knowledge on both the physical light interaction mechanisms with algae, and ... -
Measurements of ionic liquids thermal conductivity and thermal diffusivity
(Journal article; Tidsskriftartikkel; Peer reviewed, 2016-11-02)Thermal conductivity and thermal diffusivity of ionic liquids (ILs) are investigated in this work. A hot disk method for ILs thermal conductivity and thermal diffusivity measurement is utilized. Firstly, the thermal conductivity of water is measured to check the reliability of the hot disk method. In addition, the thermal conductivity of pure ILs, including BmimBF<sub>4</sub>, BmimPF<sub>6</sub>, ... -
Measuring Wind Speed Using the Internal Stabilization System of a Quadrotor Drone
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-16)This article proposes a method of measuring wind speed using the data logged by the autopilot of a quadrotor drone. Theoretical equations from works on quadrotor control are utilized and supplemented to form the theoretical framework. Static thrust tests provide the necessary parameters for calculating wind estimates. Flight tests were conducted at a test site with laminar wind conditions with the ... -
Modeling of photovoltaic power generation and electric vehicles charging on city-scale: A review
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-03-19)<p>Photovoltaics (PV) and electric vehicles (EVs) are promising technologies for increasing energy efficiency and the share of renewable energy sources in power and transport systems. As regards the deployment, use and system integration of these technologies, spatio-temporal modeling of PV power production and EV charging is of importance for several purposes such as urban planning and power grid ... -
The pure PV-EV energy system – A conceptual study of a nationwide energy system based solely on photovoltaics and electric vehicles
(Journal article; Tidsskriftartikkel; Peer reviewed, 2021-03-08)The objective of this conceptual study is to reveal the substantial potential and synergy of solar energy and electric vehicles (EVs) working together. This potential is demonstrated by studying the feasibility of a nationwide energy system solely reliant on solar energy and EVs. Photovoltaic (PV) solar energy is already an important energy source globally, but due to its intermittency it requires ... -
Rethinking the role of solar energy under location specific constraints
(Journal article; Tidsskriftartikkel; Peer reviewed, 2020-09-22)In this manuscript we evaluate the potential of photovoltaic systems to meet some dedicated energy demand in specific geographic locations. Our approach is based on location-specific constraints rather than on pre-established, location-independent methodologies or assumptions. First, we propose that a thorough analysis of the socio-economic and technical possibilities of a location must act as the ... -
Scenario-based modelling of the potential for solar energy charging of electric vehicles in two Scandinavian cities
(Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-19)In order to contribute to the reduction of greenhouse gas emissions, electric vehicles (EVs) should be charged using electricity from renewable energy sources. This paper describes a study of photovoltaics (PV) utilization for EV charging in two Scandinavian cities: Tromsø in Norway and Uppsala in Sweden, with the objective to evaluate self-sufficiency and self-consumption. The suitable areas ... -
Simulation of Anti-reflection Coated Carbonaceous Spectrally Selective Absorbers
(Journal article; Tidsskriftartikkel; Peer reviewed, 2014-11-22) -
Solar energy for residential electric vehicle charging in Northern Norway – a feasibility study
(Conference object; Konferansebidrag, 2018)This paper presents a study of the potential for using photovoltaic (PV) solar energy systems for residential charging of electric vehicles (EVs) in Northern Norway. The objective is to investigate the load match between PV yield and uncontrolled EV charging, in terms of self-consumption and self-sufficiency. The load profile for EV charging is retrieved from a study by the Norwegian Water Resources ...
