Institutt for energi og prosessteknikk
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An investigation of using CO<inf>2</inf> heat pumps to charge PCM storage tank for domestic use
(Journal article; Peer reviewed, 2023)Current investigations mainly focused on onefold phase change material (PCM) storage tank charging process, while the integration between a heat-source device and a PCM storage tank has been seldom considered. The investigation ... -
Retrieval operations of derelict fishing gears give insight on the impact on marine life
(Peer reviewed; Journal article, 2024)Abandoned, lost and discarded fishing gear (ALDFG), significantly impacts marine ecosystems and biodiversity by incidental capture known as ghost fishing. Such impacts were quantified during the Norwegian Directorate of ... -
Experiments and CFD simulation of an air-conditioned tractor cabin for thermal comfort of tractor operators in Pakistan
(Journal article; Peer reviewed, 2023)Tractors are manufactured without air-conditioned cabins in Pakistan. This leads to thermal discomfort for tractor operators working under direct solar exposure. Therefore, this study aimed to design and install an ... -
A hybrid machine learning approach for the load prediction in the sustainable transition of district heating networks
(Peer reviewed; Journal article, 2023)Current district heating networks are undergoing a sustainable transition towards the 4th and 5th generation of district heating networks, characterized by the integration of different types of renewable energy sources ... -
Exploring the Intersection of Brain–Computer Interfaces and Quantum Sensing: A Review of Research Progress and Future Trends
(Peer reviewed; Journal article, 2023)Brain–computer interfaces (BCIs) can revolutionize how humans interact with technology, but several scientific and technological challenges must be addressed to realize their full potential. Recent developments in quantum-based ... -
Study of flame-flow interactions in turbulent boundary layer premixed flame flashback over a flat plate using direct numerical simulation
(Journal article; Peer reviewed, 2023)Lean hydrogen/air premixed flame flashback in a turbulent boundary layer over a flat plate is investigated using three-dimensional direct numerical simulation with detailed chemical kinetics. The upstream propagation of ... -
Cold thermal energy storage for air conditioning in a supermarket CO2 booster refrigeration system
(Chapter, 2023)Integrated supermarket refrigeration systems are based on transcritical CO2 booster systems, supplying cooling and freezing of the products in the store and air conditioning (AC) of the shop area by cooling a glycol circuit ... -
The spatial distribution of carbon footprints and engagement in pro-climate behaviors – Trends across urban-rural gradients in the nordics
(Journal article; Peer reviewed, 2023)Climate change mitigation to the 1.5 °C calls for significant and extensive climate actions. Nordic countries are showing high engagement to climate change mitigation while the consumption and lifestyle-based carbon ... -
Part-load thermal efficiency enhancement in gas turbine combined cycles by exhaust gas recirculation
(Peer reviewed; Journal article, 2024)Gas turbine power plants are popular for offshore power generation due to high power density and their reliability. However, growing usage of renewable energies put gas turbines in a load following backup operation. These ... -
Recent progress in the application of energy technologies in Large-Scale building Blocks: A State-of-the-Art review
(Peer reviewed; Journal article, 2024)The transition to clean and sustainable energy systems in the building sector is vital to reduce global greenhouse gas emissions. In this regard, shifting the focus from single buildings to clusters of buildings, such as ... -
Student-Centered Learning Activities for Key Sustainability Competencies in Online Courses with Many Students
(Chapter, 2023)Engineers can make a valuable contribution for a transformation towards a sustainable society. The CDIO framework, where student-active and integrated learning is intrinsic to design-implement activities, therefore also ... -
Tuning the Casimir-Lifshitz force with gapped metals
(Peer reviewed; Journal article, 2023)The Casimir-Lifshitz interaction, a long-range force that arises between solids and molecules due to quantum fluctuations in electromagnetic fields, has been widely studied in solid-state physics. The degree of polarization ... -
Environmental assessment of diets: overview and guidance on indicator choice
(Peer reviewed; Journal article, 2024)Comprehensive but interpretable assessment of the environmental performance of diets involves choosing a set of appropriate indicators. Current knowledge and data gaps on the origin of dietary foodstuffs restrict use of ... -
Innovative reheat approach of the TES system during the hotel’s standstill operation utilizing a CO2 heat pump/chiller unit
(Chapter, 2023)The implementation of CO2 as a refrigerant is considered one of the solutions to improve the overall building’s energy performance, especially if the heat recovery concept is applied. In this paper, an innovative approach ... -
The effect of pressure on lean premixed hydrogen-air flames
(Journal article; Peer reviewed, 2023)The effect of pressure on the propagation of lean premixed hydrogen-air flames is investigated numerically with a hierarchy of canonical configurations including direct numerical simulations of turbulent flames in homogeneous ... -
The necessity to standardise primary energy quality in achieving a meaningful quantification of related indicators
(Journal article; Peer reviewed, 2023)The representativeness of several important parameters, such as energy return on investment (EROI) and those requiring summing primary energy (PE), are often questioned due to the gap in PE quantification technique. This ... -
Weakly nonlinear surface waves on vertically sheared currents
(Doctoral theses at NTNU;2024:57, Doctoral thesis, 2024)Extreme waves, also known as rogue waves, have much larger heights than surrounding waves, which are of great danger to ships and coastal structures. A subsurface shear current is able to change the properties of the surface ... -
New Renewable Hydrothermal Liquefaction (HTL) Biofuel: A Combustion and Emissions Study in an Optical Engine
(Journal article; Peer reviewed, 2023)This study involves the investigation of municipal solid waste (MSW) based biofuel in order to demonstrate its utilization as a diesel blendstock in a compression ignition (CI) engine. The biofuel was produced from the ... -
Does power ultrasound (26 kHz) affect the hydrogen evolution reaction(HER) on Pt polycrystalline electrode in a mild acidic electrolyte?
(Peer reviewed; Journal article, 2020)In this study, we investigated the effects of power ultrasound (26 kHz, up to ∼75 W/cm2, up to 100% acoustic amplitude, ultrasonic horn) on the hydrogen evolution reaction (HER) on a platinum (Pt) polycrystalline disc ... -
Hydrothermal Gasification of Biogas Digestate: a Parametric Study Using a Matlab-based Code
(Peer reviewed; Journal article, 2023)In this work, effect of process parameters on hydrothermal gasification (HTG) of biogas digestate are thermodynamically investigated using a Matlab-based code, which is capable of modelling the effects of the feedstock’s ...