Browsing Institutt for energi og prosessteknikk by Journals "Energies"
Now showing items 1-20 of 76
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A Comprehensive Thermal and Structural Transient Analysis of a Boiler’s Steam Outlet Header by Means of a Dedicated Algorithm and FEM Simulation
(Journal article; Peer reviewed, 2020)Increasing the share of renewables in energy markets influences the daily operation of thermal power units. High capacity power units are more frequently operated to balance power grids and, thus, steam boilers are exposed ... -
A Machine Learning Approach to Correlation Development Applied to Fin-Tube Bundle Heat Exchangers
(Journal article; Peer reviewed, 2018)Heat exchanger designers need reliable thermal-hydraulic correlations to optimize heat exchanger designs. This work combines an adaptive sampling method with a Computational Fluid Dynamics (CFD) simulator to obtain increased ... -
A Two-Dimensional Study on the Effect of Anisotropy on the Devolatilization of a Large Wood Log
(Journal article; Peer reviewed, 2019)In this work, a two-dimensional (2D) model for wood particle drying, devolatilization, and char conversion is presented and validated against experimental studies of devolatilization of a large, dry, cylindrical birch wood ... -
Advanced Thermodynamic Analysis of a Transcritical R744 Booster Refrigerating Unit with Dedicated Mechanical Subcooling
(Journal article; Peer reviewed, 2018)In this work the thermodynamic performance of a transcritical R744 booster supermarket refrigeration system equipped with R290 dedicated mechanical subcooling (DMS) was exhaustively investigated with the aid of the advanced ... -
An Integrated Assessment of the Environmental and Economic Impact of Offshore Oil Platform Electrification
(Journal article; Peer reviewed, 2019)Electrification of offshore oil and gas installations on the Norwegian continental shelf is one of several options to decrease the CO2 emitted from these installations. However, there is an ongoing debate regarding how the ... -
Analysis of a vertical flat heat pipe using potassium working fluid and a wick of compressed nickel foam
(Journal article; Peer reviewed, 2016)Heat at high temperatures, in this work 400–650 °C, can be recovered by use of cooling panels/heat pipes in the walls of aluminum electrolysis cells. For this application a flat vertical heat pipe for heat transfer from a ... -
Analysis of Combined Cycle Power Plants with Chemical Looping Reforming of Natural Gas and Pre-Combustion CO2 Capture
(Journal article; Peer reviewed, 2018)In this paper, a gas-fired combined cycle power plant subjected to a pre-combustion CO2 capture method has been analysed under different design conditions and different heat integration options. The power plant configuration ... -
Application of a Central Composite Design for the Study of NOx Emission Performance of a Low NOx Burner
(Journal article; Peer reviewed, 2015)In this study, the influence of various factors on nitrogen oxides (NOx) emissions of a low NOx burner is investigated using a central composite design (CCD) approach to an experimental matrix in order to show the applicability ... -
Assessment of organic Rankine cycle part-Load performance as gas turbine bottoming cycle with variable area nozzle turbine technology
(Peer reviewed; Journal article, 2021)Power cycles on offshore oil and gas installations are expected to operate more at varied load conditions, especially when rapid growth in renewable energies puts them in a load-following operation. Part-load efficiency ... -
At what Pressure Shall CO2 Be Transported by Ship? An in-Depth Cost Comparison of 7 and 15 Barg Shipping
(Peer reviewed; Journal article, 2021)The pipeline has historically been the preferred means to transport CO2 due to its low cost for short distances and opportunities for economies of scale. However, interest in vessel-based transport of CO2 is growing. While ... -
Building Retrofitting through Coupling of Building Energy Simulation-Optimization Tool with CFD and Daylight Programs
(Peer reviewed; Journal article, 2021)Simultaneous satisfaction of both thermal and visual comfort in buildings may be a challenging task. Therefore, this paper suggests a comprehensive framework for the building energy optimization process integrating ... -
Catchment Based Aerodynamic Performance Analysis of Small Wind Turbine Using a Single Blade Concept for a Low Cost of Energy
(Journal article; Peer reviewed, 2020) -
CFD-DEM simulation of biomass pyrolysis in fluidized-bed reactor with a multistep kinetic scheme
(Peer reviewed; Journal article, 2020)The pyrolysis of biomass in a fluidized-bed reactor is studied by a combination of a CFD-DEM algorithm and a multistep kinetic scheme, where fluid dynamics, heat and mass transfer, particle collisions, and the detailed ... -
Characterization of Aerodynamics of Small Wind Turbine Blade for Enhanced Performance and Low Cost of Energy
(Peer reviewed; Journal article, 2022)During a turbine’s lifetime, minimizing the cost of power production should be the primary aim in addition to attaining high technical efficiency. Thus, this paper was aimed at enhancing the aerodynamic efficiency of a ... -
CO2 Capture and Enhanced Hydrogen Production Enabled by Low-Temperature Separation of PSA Tail Gas: A Detailed Exergy Analysis
(Journal article; Peer reviewed, 2024)Abstract Hydrogen from natural gas reforming can be produced efficiently with a high CO2 capture rate. This can be achieved through oxygen-blown autothermal reforming as the core technology, combined with pressure-swing ... -
CO2 Capture from IGCC by Low-Temperature Synthesis Gas Separation
(Journal article; Peer reviewed, 2022)Capture conditions for CO2 vary substantially between industrial point sources. Depending on CO2 fraction and pressure level, different capture technologies will be required for cost- and energy-efficient decarbonisation. ... -
Combining life cycle environmental and economic assessments in building energy renovation projects
(Journal article; Peer reviewed, 2017)Buildings currently play a fundamental role for the achievement of the sustainable development goals as they are responsible for several environmental, social, and economic impacts. Energy renovation projects of existing ... -
Constraints of Parametrically Defined Guide Vanes for a High-Head Francis Turbine
(Peer reviewed; Journal article, 2021)This paper is focused on the guide vane cascade as one of the most crucial stationary sub-systems of the hydraulic turbine, which needs to provide efficient inflow hydraulic conditions to the runner. The guide vanes direct ... -
Current Trends for State-of-Charge (SoC) Estimation in Lithium-Ion Battery Electric Vehicles
(Peer reviewed; Journal article, 2021)Energy storage systems (ESSs) are critically important for the future of electric vehicles. Despite this, the safety and management of ESSs require improvement. Battery management systems (BMSs) are vital components in ESS ... -
Design of Groundwater Heat Pump Systems. Principles, Tools, and Strategies for Controlling Gas and Precipitation Problems
(Journal article; Peer reviewed, 2019)The utilization of groundwater heat pump systems is increasing in Norway, which are currently widely employed for heating and cooling applications in the town center of Melhus. The investigations of the Melhus installations ...