Browsing NTNU Open by Author "Andresen, Trond"
Now showing items 1-20 of 29
-
A novel methodology for Rankine cycle analysis with generic heat exchanger models
Hagen, Brede; Nikolaisen, Monika; Andresen, Trond (Journal article; Peer reviewed, 2019)This study presents a novel approach for Rankine cycle (RC) analysis, introducing a generic counter current heat exchanger (HX) model to enable basic fluid thermal and flow behaviour in HXs to be considered in a cycle ... -
Aksjemarked-modell som spontant (adaptivt) utvikler urolig/ustabil dynamikk
Natvik, Atle (Master thesis, 2010)Oppgaven tar utganspunkt i en modell av det ideelle aksjemarkedet, og utvider denne for å vise hvordan spekulativ investering kan oppstå spontant fra et ideelt marked. Modellen utvikles gradvis og implementeres i Simulink. ... -
Analysis of an integrated heating and cooling system for a building complex with focus on long–term thermal storage
Rohde, Daniel; Andresen, Trond; Nord, Natasa (Journal article; Peer reviewed, 2018)Modern building complexes have simultaneous heating and cooling demands. Therefore, integrated energy systems with heat pumps and long-term thermal storage are a promising solution. An integrated heating and cooling system ... -
Comparing Three Methods for Design Analyses of Rankine Cycle for Waste Heat Recovery from Natural Gas Compression
Deng, Han; Hagen, Brede; Nikolaisen, Monika; Andresen, Trond (Chapter, 2020)This study applies three methods for design of Rankine cycles utilizing waste heat in the oil and gas industry. The methods differ in the level of detail of heat exchanger model applied and in the flexibility with respect ... -
Documentation of an integrated thermal energy system for a building complex
Rohde, Daniel; Bantle, Michael; Andresen, Trond; Nord, Natasa (Chapter, 2015)In large buildings and building complexes, energy use can be reduced by efficient interaction between heating and cooling demands and thermal storage (short and long term storage). This work describes an integrated energy ... -
Dynamic Analysis of Energy Recovery Utilizing Thermal Storage from Batch-Wise Metal Casting
Andresen, Trond; Lingaas, Simon Johan Nilsen; Hagen, Brede; Nekså, Petter (Chapter, 2020)The thermal exergy contained in the liquid metal in ferroalloy production makes it an interesting source for energy recovery. The heat released during casting is rarely utilized today. This work investigates the feasibility ... -
Dynamic optimization of control setpoints for an integrated heating and cooling system with thermal energy storages
Rohde, Daniel; Knudsen, Brage Rugstad; Andresen, Trond; Nord, Natasa (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 ... -
Dynamic simulation of future integrated energy systems
Rohde, Daniel (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 ... -
Dynamisk simulering av systemløsninger for kuldeanlegg i supermarked
Watvedt, Lars Siewers (Master thesis, 2011)Energibruk i supermarkeder er blant de høyeste innefor bygningssektoren i Norge. Norske supermarkeder har typisk et årlig energibehov på mellom 400 og 600 kWh/m^2 . Opp mot 50 % av dette totale energibehovet går til ... -
Effect of design specifications for off-design operation of low temperature Rankine cycles using zeotropic mixtures and pure working fluids
Durakovic, Goran (Master thesis, 2018)Using organic Rankine cycles to produce power from low temperature heat sources seems like a promising solution to lower our reliance on environmentally damaging energy sources. By introducing this technology to new and ... -
Enabling Efficient Heat Recovery from Aluminium Pot Gas
Clos, Daniel Perez; Andresen, Trond; Nekså, Petter; Johnsen, Sverre Gullikstad; Aune, Ragnhild Elizabeth (Chapter, 2017)In the present work, previous studies carried out by the Norwegian aluminium industry and research centres with the aim of recovering heat from aluminium production off-gas, are reviewed. The main challenge in improving ... -
Energy Recovery From Furnace Off-Gas: Analysis of an Integrated Energy Recovery System by Means of Dynamic Simulation
Rohde, Daniel; Andresen, Trond; Zotica, Cristina; Wilpert, Paul (Chapter, 2020)Surplus heat recovery and electricity generation from furnace off-gas has been implemented at several silicon and ferro-alloy plants in Norway. There is likely significant potential for improvement of both technology ... -
Evaluation of Rankine cycles with mixed component working fluids
Nikolaisen, Monika (Master thesis, 2017)The thesis evaluates the performance of Rankine cycles with mixed component hydrocarbon working fluids, or hydrocarbon mixtures. The objective is to compare mixtures with pure fluids on the basis of the same total heat ... -
Feasibility of using Rankine power cycles for utilisation of medium to low temperature heat sources in the industry
Røssland, Kjersti (Master thesis, 2016)In this paper, an overview of different ORC applications is presented, along with a market review that includes major manufacturers, application areas and cost estimates. Focus was laid upon low (100C) to medium ... -
Gradient Based Design Optimization of a Radial Inflow Turbine
Hagen, Brede; Cavo, Matteo; Andresen, Trond; Nekså, Petter (Chapter, 2020)The expander is one of the key components of an ORC as the cycle efficiency strongly depends on the expander efficiency. This paper presents a method for design optimization of a radial inflow turbine (RIT) using a mean-line ... -
Heat-to-power conversion from variable surplus heat sources utilizing a thermal energy storage
Lingaas, Simon Johan Nilsen (Master thesis, 2019)Målet med dette arbeidet var å undersøke den potensielle nytten av termisk buffring i et varmegjennvinningssystem. Arbeidet undersøkte muligheten for å integrere en form for termisk lagring inn i et varmegjennvinningssystem ... -
Improved Macroeconomic Control with Electronic Money and Modern Monetary Theory
Andresen, Trond (Journal article; Peer reviewed, 2013) -
Interaction Between a Building Complex with an Integrated Thermal Energy System and a District Heating System
Rohde, Daniel; Andresen, Trond; Nord, Natasa (Chapter, 2016)Integrated thermal energy systems provide heating and cooling for several commercial and residential buildings. These systems usually have both short-term and seasonal thermal energy storages. High cooling demands lead to ... -
Mathematical modeling of CO2 based heat pumping systems: New developments for simulation tools to aid the design of systems for non-residential buildings
Andresen, Trond (Doktoravhandlinger ved NTNU, 1503-8181; 2009:180, Doctoral thesis, 2009)CO2 based heat pumping systems have in recent years received considerable focus world-wide. Now, attention has been turned toward heating and cooling of larger, non-residential buildings. With plate heat exchanger’s now ... -
Modeling and Simulation of Human Folly in Decision Making Processes
Torseth, Hege Hjelen (Master thesis, 2015)This master's thesis is about modelling and simulation of "human folly" in decision making processes. What makes us humans act incorrect when we deep down know what is the right thing to do? The answer to this question is ...