Browsing NTNU Open by Author "Zotica, Cristina"
Now showing items 1-9 of 9
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Advanced Control Structures for Balancing Supply and Demand in Steam Distribution Networks
Vik, Erik Andre Klepp (Master thesis, 2021)Denne masteroppgaven presenterer en overvåkende kontrollstruktur basert på PID-kontrollere, for å balansere tilbud og etterspørsel i et dampnettverk. Deretter blir prestasjonen sammenliknet med en modellprediktiv kontroller. ... -
Control structures with embedded process knowledge
Bjorvand, Simen (Master thesis, 2020)I denne oppgaven er det studert en ny metodikk for å transformere ikke-lineære prosesser til lineære prosesser som gir perfekt forstyrrelsesavvisning og dekopling ved bruk av en manipulert variabel (MV) transformasjon. ... -
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 ... -
Input transformation for linearization, decoupling and disturbance rejection with application to steam networks
Zotica, Cristina; Skogestad, Sigurd (Peer reviewed; Journal article, 2021)Pressure-flow networks are inherently multivariable, coupled and nonlinear systems that are not straightforward handled by conventional PID controllers. In this work, we analyze the control problem for a steam distribution ... -
Modelling and control of a Heat-to-Power cycle
Andersskog, Ida (Master thesis, 2019)En Varme-til-Kraft syklus er ofte benyttet i kraftindustrien for å konvertere termisk energi til elektrisk energi. Syklusen kan deles inn i tre hovedprosesser: forbrenning, vann/damp og generator, under antagelse om at ... -
Optimal Operation and Control of a Thermal Energy Storage System: Classical Advanced Control versus Model Predictive Control
Zotica, Cristina; Pineiro, David Perez; Skogestad, Sigurd (Peer reviewed; Journal article, 2020)The objective of this work is to define the optimal operation and control for a thermal storage system with heat sources and a consumer, which exchange utilities using one hot water thermal energy storage tank. In this ... -
Optimal operation and control of heat to power cycles: A new perspective from a systematic plantwide control approach
Zotica, Cristina; Nord, Lars O.; Kovács, Jenő; Skogestad, Sigurd (Peer reviewed; Journal article, 2020)In this work, we use a plantwide control framework to systematically identify the control objectives, operational and environmental constraints, and degrees of freedom for a heat to power cycle with a drum, one pressure ... -
Optimal Operation and Control of Thermal Energy Systems
Zotica, Cristina (Doctoral theses at NTNU;2023:43, Doctoral thesis, 2023)This thesis explores broad topics in the area of optimal control and operation of thermal energy systems, and it is divided into three parts. Part I is entitled Optimal operation and control of heat-to-power cycles: a ... -
Transformed Manipulated Variables for Linearization, Decoupling and Perfect Disturbance Rejection
Zotica, Cristina; Alsop, Nicholas; Skogestad, Sigurd (Journal article; Peer reviewed, 2020)