Institutt for energi og prosessteknikk
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Optimalisering av ventilasjonsstrategi for høyisolerte svømmehaller
(Master thesis, 2021)Svømmehaller er Norges mest energikonsumerende bygningstype med tilnærmet uforandret energibruk de siste 15 årene. En betydelig mengde energi medgår til ventilering i form av romoppvarming, avfukting og luftskifte. Med en ... -
A study on the integration of air-source heat pumps, solar collectors, and PCM tanks for outdoor swimming pools for winter application in subtropical climates
(Peer reviewed; Journal article, 2020)This study presents a new integration of air-source heat pumps, solar collectors, and phase change material tanks regarding the dynamics of outdoor swimming pools, and investigates its application in outdoor swimming pools ... -
Compact steam bottoming cycles: minimum weight design optimization and transient response of once through steam generators
(Peer reviewed; Journal article, 2021)Compactness and weight minimization are key aspects for successful and widespread implementation of waste heat recovery steam cycles in off-shore oil and gas platforms due to the site weight and volume footprint constraints. ... -
The inter-scale energy budget in a von Kármán mixing flow
(Peer reviewed; Journal article, 2020)A detailed assessment of the inter-scale energy budget of the turbulent flow in a von Kármán mixing tank has been performed based on two extensive experimental data sets. Measurements were performed at a Taylor microscale ... -
The impact of air change rate on the air quality of surgical microenvironment in an operating room with mixing ventilation
(Peer reviewed; Journal article, 2020)Transmission of airborne microbe-carrying particles (MCPs) is one of the key factors causing surgical site infection during surgical procedures. In operating rooms (ORs) with mixing ventilation, air change rate may determine ... -
Muligheter for energieffektivisering og reduksjon av effekttopper i eksisterende bygninger
(Master thesis, 2021)Energibruk i bygninger står for 40 % av Norges totale energiforbruk og behovet er økende. Med økt energiforbruk øker belastningen på dagens strømnett som skal levere nok strøm til kundene, og en planlagt utbygging av ... -
The effect of active grid-generated freestream turbulence on an aeroelastic NACA4412 airfoil
(Master thesis, 2021)Aerodynamiske og strukturelle egenskaper til en NACA4412-bæreflate har blitt undersøkt eksperimentelt i den store lukkede vindtunnelen ved NTNU. Hensikten var å få innsikt i hvordan freestream-turbulens, som ble generert ... -
Aerodynamically driven rupture of a liquid film by turbulent shear flow
(Peer reviewed; Journal article, 2020)The rupture of a liquid film due to coflowing turbulent shear flows in the gas phase is studied using a volume-of-fluid method. To simulate this multiphase problem, we use a simplified numerical setup where the liquid film ... -
The impact of interventions in the global land and agri-food sectors on Nature’s Contributions to People and the UN Sustainable Development Goals
(Journal article, 2020)Interlocked challenges of climate change, biodiversity loss, and land degradation require transformative interventions in the land management and food production sectors to reduce carbon emissions, strengthen adaptive ... -
Investigation of R744 refrigeration system for supermarkets and the possibility of integrating a cold thermal energy storage
(Master thesis, 2021)Denne rapporten oppsummerer arbeidet som er gjort for masteroppgaven våren 2021. Rapporten er en videreføring av forprosjektet skrevet høsten 2020. Temaet for rapporten er CO2-kjølesystemer for supermarkeder og muligheten ... -
Evaluation of a pillow-plate heat exchanger for a pump-circulated CO2 refrigeration system
(Chapter, 2020)Cold thermal energy storage (CTES) technology integrated into refrigeration systems has been proposed as a solution for peak shaving of refrigeration demands. This paper presents the results obtained from an experimental ... -
Integrated thermal storage and heat recovery of the CO2 refrigeration system for fishing vessels
(Chapter, 2020)The natural refrigerant CO2 is gaining an attraction for fishing vessels due to its compact units, negligible global warming potential (GWP), and non-toxic behaviour. Chilling and freezing onboard are energy-consuming ... -
Trading-off ecosystem services for better ecological restoration: A case study in the Loess Plateau of China
(Journal article, 2020)Balancing trade-off between multiple ecosystem services (ESs) is critical for restored ecosystem, including in the Loess Plateau of China where ESs are undergoing significant changes. In this study, the ESs were quantified ... -
Relationships of multiple landscape services and their influencing factors on the Qinghai–Tibet Plateau
(Journal article, 2020)Context Constructing a sustainable landscape pattern from the perspective of landscape sustainability is scientifically built on the clarification of the formation mechanisms of landscape services and their relationships. ... -
Study of an Industrial Electrode Dryer of a Lithium-Ion Battery Manufacturing Plant: Dynamic Modelling
(Peer reviewed; Journal article, 2020)A dynamic model for lithium-ion battery (LIB) electrode manufacturing and drying is developed in this paper. The model is intended for analysis of different drying technologies, energy requirement calculations, and ... -
Cross-Scale Flow Field Analysis of Sealing Chamber and End Face Considering the CO2 Real Gas Effect
(Peer reviewed; Journal article, 2021)The dry gas seal (DGS) is a non-contacting, gas-lubricated mechanical face seal commonly used in rotating machinery. Traditional analyses of DGSs treat the end face as an independent factor by setting the end-face inlet ... -
Electroless Production of Fertilizer (Struvite) and Hydrogen from Synthetic Agricultural Wastewaters
(Peer reviewed; Journal article, 2020)The drive toward sustainable phosphorus (P) recovery from agricultural and municipal wastewater streams has intensified. However, combining P recovery with energy conservation is perhaps one of the greatest challenges of ... -
Hydrogen production from methanol partial oxidation through the catalyst prepared using torrefaction liquid products
(Peer reviewed; Journal article, 2020)This study developed a novel application of torrefaction liquid products (TLPs) for acidic catalyst sol-gel synthesis of SiO2 from tetraethyl orthosilicate (TEOS) to improve the thermal stability of Al2O3 catalyst supporter. ... -
A new design of catalytic tube reactor for hydrogen production from ethanol steam reforming.
(Peer reviewed; Journal article, 2020)A new design of the catalytic tube system with a crossflow configuration, featured by low catalyst usage and cost, is developed using computational fluid dynamics (CFD). Meanwhile, the kinetics of ethanol steam reforming ... -
Review on numerical techniques applied in impulse hydro turbines
(Peer reviewed; Journal article, 2020)Impulse turbines are widely used in hydropower plants around the world due to their high efficiency in a larger operating range compared to reaction turbines. State of the art Pelton turbines can give over 90% efficiency ...
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