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Optimal Operation of a Solar Powered Thermal Energy Storage System for Cooking
(Master thesis, 2020)I denne masteroppgaven ble driften av et varmelagringssystem drevet av overskuddsenergi fra solcelleproduksjon for matlaging modellert og optimalisert. Hovedformålet med oppgaven var å undersøke systemets kapasitet under ... -
Optimal operation of a subsea separation system including a coalescence based gravity separator model and a produced water treatment section
(Journal article; Peer reviewed, 2019)In this work, we develop a model for a gravity separator, and we use it together with models from the literature to study the control of a subsea separation system that separates oil, gas, and water from well fluids in ... -
Optimal Operation of Dividing Wall Columns
(Doktoravhandlinger ved NTNU, 1503-8181; 2011:177, Doctoral thesis, 2011)This thesis discusses the control and operation of dividing wall columns. In particular the attention is on the Kaibel column, a four-product dividing wall column with two side-streams. The Kaibel column has for a given ... -
Optimal operation of energy storage in buildings - Use of hot water systems
(Master thesis, 2013)The purpose of this study is to maximize the potential which lies in domestic hot water heaters. Today the temperature function in the hot water tank is constant throughout the day and the hot water demand is met by an ... -
Optimal Operation of Heat Exchanger Networks
(Master thesis, 2011)Optimal operation of heat exchanger networks is much less studied than optimal design. The control objective of a heat exchanger network is to control the temperature out of the heat exchanger network within a certain ... -
Optimal Operation of Integrated Chemical Processes: With Application to the Ammonia Synthesis
(Doctoral theses at NTNU;2018:222, Doctoral thesis, 2018)Chemical processes have to be operated at their economic optimum to remain competitive. This is called optimal operation. Optimal operation is frequently incorporated using a real-time optimization approach. In this approach, ... -
Optimal Operation of Kaibel Columns
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:297, Doctoral thesis, 2014)Kaibel distillation column performs the separation of 4 products in a dividing-wall arrangement. This column provides significant energy and capital savings compared to conventional arrangements. The focus in this thesis ... -
Optimal Operation of Parallel Heat Exchanger Networks
(Master thesis, 2013)Optimal operation of parallel heat exchanger networks is desirable for many processesaiming to achieve increased supply and potentially higher profit. The aimis to control the final outlet temperature within a certain ... -
Optimal Operation of Refrigeration Cycles
(Doktoravhandlinger ved NTNU, 1503-8181; 2008:91, Doctoral thesis, 2008) -
Optimal Operation of Small LNG Refrigeration Cycles
(Master thesis, 2016)With the recent increases in the market of natural gas, new production alternatives have become available. One of these is the production in remote places. To increase the profit of this process, it is necessary to count ... -
Optimal operation strategies for dynamic processes under uncertainty
(Doctoral thesis at NTNU;2016:105, Doctoral thesis, 2016)The main focus of this thesis is to find implementation strategies for the optimal operation of processes during transients. That is, we do not focus on the algorithms to solve a given dynamic optimization problem, but ... -
Optimal Operation with Changing Active Constraint Regions using Classical Advanced Control
(Journal article; Peer reviewed, 2018)With ”classical advanced control” we mean the control structures that are commonly used in industry for multivariable control. These have been in use for at least 50 years, but surprisingly there is little literature ... -
Optimal operation with changing control objectives
(Doctoral theses at NTNU;2024:196, Doctoral thesis, 2024)This thesis proposes advances in control structure design, with the goal of solving a steady-state optimization problem through feedback control. When disturbances act upon the system and change the set of constraints that ... -
Optimal PI and PID control of first-order plus delay processes and evaluation of the original and improved SIMC rules
(Journal article; Peer reviewed, 2018)The first-order plus delay process model with parameters k (gain), τ (time constant) and θ (delay) is the most used representation of process dynamics. This paper has three objectives. First, we derive optimal PI- and ... -
Optimal PID settings for first and second-order processes - Comparison with different controller tuning approaches
(Master thesis, 2016)PID controllers are extensively used in industry. Although many tuning methodologies exist, finding good controller settings is not an easy task and frequently optimization-based design is preferred to satisfy more complex ... -
Optimal Renewable Energy Distribution Between Gasifier and Electrolyzer for Syngas Generation in a Power and Biomass-to-Liquid Fuel Process
(Peer reviewed; Journal article, 2022)By adding energy as hydrogen to the biomass-to-liquid (BtL) process, several published studies have shown that carbon efficiency can be increased substantially. Hydrogen can be produced from renewable electrical energy ... -
Optimal scheduling of flexible thermal power plants with lifetime enhancement under uncertainty
(Peer reviewed; Journal article, 2021)Renewable energy sources have been the focal point to decarbonise the power sector. The large deployment of these intermittent power generation units requires mechanisms to balance the grid. Thermal power plants can provide ... -
Optimal setpoints for a pH neutralization process
(Master thesis, 2013)The purpose of this thesis was to determine the optimal setpoints for a pH neutralization process in three stages. A strong acid is to be neutralized by adding a strong base (reagent) in a series of three mixing tanks. The ... -
Optimal Temperature Control of Rooms for Minimum Energy Cost
(Master thesis, 2013)In this thesis was a room with direct heating in the floor and room modelled. The aim has been to minimize the energy cost of the room, assuming that the future energy price and weather forecast is known. The constrained ... -
Optimal tuning of PID controllers: And the verification of the SIMC rules
(Doctoral theses at NTNU;2018:389, Doctoral thesis, 2018)Optimal tuning of PID controllers and the verification of the SIMC rules The simple PI/PID controller is the most used controller in the process industry. However, finding good settings for this simple controller is not ...