Institutt for energi og prosessteknikk
Recent Submissions
-
Dynamic simulation of future integrated energy systems
(Doctoral theses at NTNU;2019:213, Doctoral thesis, 2019)The building sector is responsible for a large part of the world's total energy use. More than half of building energy use is needed for space heating, domestic hot water heating, and space cooling. Thermal energy supply ... -
Water-repellent surfaces consisting of nanowires on micro-pyramidal structures
(Journal article; Peer reviewed, 2019)Super-repellent surfaces are relevant for several practical applications, such as water collection and self-cleaning and anti-icing surfaces. However, designing surfaces that can maintain their super-repellency when the ... -
A Parametric Study of LEM3D Based on Comparison with a Turbulent Lifted Hydrogen Jet Flame in a Vitiated Co-Flow
(Journal article; Peer reviewed, 2019)A novel model, the hybrid RANS-LEM3D model, is applied to a lifted turbulent N 2 diluted hydrogen jet flame in a vitiated co-flow of hot products from lean H 2 /air combustion. In the present modeling approach, mean-flow ... -
Road Planning and Route Alignment Selection Criteria in the Norwegian Context
(Journal article; Peer reviewed, 2019)This paper reveals the main factors that guide road alignment design process in Norway. The goal is to discover what constitutes the main priorities for road planners, how these priorities are ranked when it comes to ... -
Nonsmooth Analysis In Process Modeling, Design And Optimization
(Chapter, 2019)Nonsmooth models provide a powerful, compact and intuitive modeling paradigm that can represent a growing spectrum of physical phenomena over broad ranges of conditions in terms of the original process variables. This paper ... -
Modeling and Simulation of a Waste Tire to Liquefied Synthetic Natural Gas (SNG) Plant
(Chapter, 2019)Thermochemical conversion of solid wastes through gasification offers the dual benefit of production of high-value fuels from the recovered energy and environmentally friendly waste disposal. Waste tires in particular may ... -
Modeling and Optimization of Simultaneous Waste Heat Utilization and Wastewater Treatment Processes
(Chapter, 2019)Huge amounts of low-temperature waste heat, which can be utilized to improve the energy efficiency in various ways, are available in the process industries. Organic Rankine Cycle (ORC) is one of the promising technologies ... -
Particle Erosion in Control Valves
(Doctoral theses at NTNU;2019:260, Doctoral thesis, 2019) -
Work and Heat Exchange Networks – Opportunities and Challenges
(Journal article; Peer reviewed, 2018)Design and optimization of Heat Exchanger Networks (HENs) is well established and has been heavily applied in the process industries since its pioneering period in the 1970s and 1980s. While temperature and thermal energy ... -
Comparison of reformulations of the Duran-Grossmann model for Work and Heat Exchange Network (WHEN) synthesis
(Journal article; Peer reviewed, 2018)Work and Heat Exchange Networks (WHENs) have received increasing attention from both researchers and engineers during the last 5-10 years. The Duran-Grossmann model (Duran and Grossmann, 1986) can deal with heat integration ... -
Comparison of Liquefaction Processes for FLNG
(Journal article, 2018)This paper conducts a comparative evaluation of natural gas liquefaction processes developed for floating facilities. The simulation results are analyzed, focusing on thermodynamic efficiency, compactness, safety, and ... -
Simulation of a Dual Mixed Refrigerant Process using i Nonsmooth Framework
(Journal article; Peer reviewed, 2018)Natural gas liquefaction is an energy intensive process with very small driving forces at cryogenic temperatures. Small temperature differences arise from the excessive exergy destruction that occurs from irreversible heat ... -
Measuring the thermal conductivity of membrane and porous transport layer in proton and anion exchange membrane water electrolyzers for temperature distribution modeling
(Journal article; Peer reviewed, 2019)Water electrolyzers that use a membrane electrolyte between the electrodes are a promising technology towards mass production of renewable hydrogen. High power setups produce a lot of heat which has to be transported through ... -
Tolman lengths and rigidity constants from free-energy functionals – General expressions and comparison of theories
(Journal article; Peer reviewed, 2019)The leading order terms in a curvature expansion of the surface tension, the Tolman length (first order), and rigidities (second order) have been shown to play an important role in the description of nucleation processes. ... -
Dispersion forces in inhomogeneous planarly layered media: A one-dimensional model for effective polarizabilities
(Journal article; Peer reviewed, 2019)Dispersion forces such as van der Waals forces between two microscopic particles, the Casimir-Polder forces between a particle and a macroscopic object, or the Casimir force between two dielectric objects are well studied ... -
Assessment of the beneficial combination of electrochemical and ultrasonic activation of compounds originating from biomass
(Journal article; Peer reviewed, 2020)The electro-oxidation of organic molecules at the anode with simultaneous generation of hydrogen at the cathode in electrosynthesis reactors is considered as a promising and efficient process for the co-production of ... -
Experimental study of smouldering in wood pellets with and without air draft
(Journal article; Peer reviewed, 2020)Dry wood pellets (diameter 8 mm) of mixed Norwegian spruce and pine were tested in samples of 1.25 kg (1.7 l) in configurations with and without air draft from below. The pellets were placed in a vertical 15 cm diameter ... -
Heating performance enhancement of a new design trombe wall using rectangular thermal fin arrays: An experimental approach
(Journal article; Peer reviewed, 2019)It has been nowadays recognized that addressing energy use in buildings can reduce the fossil fuels usage and CO2 emission. Trombe wall is a widely applicable passive solar design option that can significantly reduce the ... -
Dynamic optimization of control setpoints for an integrated heating and cooling system with thermal energy storages
(Journal article; Peer reviewed, 2019)Energy systems for buildings and neighborhoods are expected to become more complex and flexible. Advanced control strategies are required to exploit the full potential of this flexibility and are especially important for ... -
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 ...
RSS 2.0