Now showing items 145-164 of 192

    • Raman Spectroscopy as an Online Monitoring Tool for CO2 Capture Process: Demonstration Using a Laboratory Rig 

      Jinadasa, Wathsala; Jens, Klaus-Joachim; Øi, Lars Erik; Halstensen, Maths (Journal article; Peer reviewed, 2017)
      A laboratory CO2 capture rig at USN was used as a demonstration plant to show the feasibility of Raman spectroscopy for online monitoring of speciation in CO2 capture process. The spectroscopy was integrated to lean and ...
    • Re-interpretation of NIPALS results solves PLSR inconsistency problem 

      Ergon, Rolf (Journal article; Peer reviewed, 2009)
      The well-known nonlinear iterative partial least squares (NIPALS) algorithm is commonly used for computation of components in partial least squares regression (PLSR) with orthogonalized score vectors. Based on generalized ...
    • Reactive Power Control of Grid Interactive Battery Energy Storage System for WADC 

      Torkzadeh, Roozbeh; Chamorro, Harold; Rye, Rebecca; Eliassi, Mojtaba; Toma, Lucian; Gonzalez-Longatt, Francisco (Chapter, 2019)
      The integration of Grid Interactive Battery Energy Storage Systems (GI-BESSs) in energy services, such as peak shaving and load balancing, is a common practice in the modern-day electric power system. However, it is essential ...
    • A Real-Time Flow-Measuring Algorithm for Open Venturi Channel Non-Newtonian Flow 

      Welahettige, Prasanna Kumara Welahetti; Lie, Bernt; Vågsæther, Knut (Peer reviewed; Journal article, 2019)
      A real-time flow measuring algorithm is developed for the open Venturi channel non-Newtonian flow measurement. Using a single level sensor reading at downstream of the open Venturi channel, a drilling-well return flow rate ...
    • Recruiting competence from vocational schools : paradise regained? 

      Clausen, Trond; Hagen, Svein Thore; Hasleberg, Harald (Conference object, 2004)
      After a period of declining student enrolment, in 2002 Telemark University College (TUC) took advantage of vocational schools reforms to establish a three years bachelor programme in electrical engineering for a pilot ...
    • Recruiting engineering students from vocational school 

      Clausen, Trond; Hagen, Svein Thore; Hasleberg, Harald; Aarnes, Jens Harald (Conference object, 2003)
      By the consent of the Norwegian Ministry of Education and Research, Telemark University College (TUe), Porsgrunn, Norway, this fall semester started a pilot class in electrical engineering recruiting solely from vocational ...
    • Reduced PCR/PLSR models by subspace projections 

      Ergon, Rolf (Journal article; Peer reviewed, 2006)
      Latent variables models used in principal component regression (PCR) or partial least squares regression (PLSR) often use a high number of components, and this makes interpretation of score and loading plots difficult. ...
    • Relaxed Ziegler-Nichols closed loop tuning of PI controllers 

      Haugen, Finn; Lie, Bernt (Journal article; Peer reviewed, 2013)
      A modification of the PI setting of the Ziegler-Nichols closed loop tuningmethod is proposed. The modification is based on a combination of the Skogestad SIMCtuning formulas for ´´integrator plus time-delay´´ processes ...
    • Review of simulator training practices for industrial operators: How can individual simulator training be enabled? 

      Marcano, Laura; Haugen, Finn; Sannerud, Arne Ronny; Komulainen, Tiina M. (Journal article; Peer reviewed, 2019)
      The aim of simulator training is to improve the safety and integrity of operations. Effective simulator training involves relevant feedback and sound assessment of the operator’s performance. Operators need proper feedback ...
    • Rheological characterization of non-Newtonian Drilling Fluids with non-invasive Ultrasonic Interrogation 

      Jondahl, Morten Hansen; Viumdal, Håkon; Mozie, Kenneth Nonso; Mylvaganam, Saba (Journal article; Peer reviewed, 2017)
      The drilling process is generally costly and time consuming and prone to serious hazards. Cost-efficiency and enhanced safety measures are vital for any drilling operation. Recent studies indicate that poor reliability in ...
    • Robust PI controller design for frequency stabilisation in a hybrid microgrid system considering parameter uncertainties and communication time delay 

      Veronica, Arockya Jaya Samy Jeya; Kumar, Natarajan Senthil; Gonzalez-Longatt, Francisco (Peer reviewed; Journal article, 2019)
      One of the major issues in the operation of an islanded microgrid is the frequency deviations caused by the variation of power production coming from non-dispatchable renewable energy sources. Using an appropriate control ...
    • Second Order KP Scheme for the Solution of flow in a Venturi Channel 

      Dissanayake, Susantha; Sharma, Roshan; Lie, Bernt (Journal article; Peer reviewed, 2018)
      In many different applications, a Venturi channel is used as a tool to compute fluid flow rates. The Saint-Venant equation is a hyperbolic type Partial Differential Equation (PDE) which can be used to model fluid flows ...
    • Second order scheme for open channel flow 

      Sharma, Roshan (Preprint, 2015-08-26)
      In the search for a numerical scheme which: (i) is semi-descrete in nature (only space discritization) so that built-in ODE solvers in MATLAB or Modelica can be used, (ii) can handle dry bed conditions (island or dry ...
    • Selection methodology of energy consumption model based on data envelopment analysis. 

      Nakhodov, Vladimir; Baskys, Algirdas; Skeie, Nils-Olav; Pfeiffer, Carlos Fernando; Dmytro, Ivanko (Journal article; Peer reviewed, 2017)
      The energy efficiency monitoring methods in industry are based on statistical modeling of energy consumption. In the present paper, the widely used method of energy efficiency monitoring “Monitoring and Targeting systems” ...
    • Semi Discrete Scheme for the Solution of Flow in River Tinnelva 

      Dissanayake, Susantha; Sharma, Roshan; Lie, Bernt (Chapter; Peer reviewed, 2016)
      The Saint-Venant equation is a mathematical model which could be used to study water flow in an open channel, river etc. The Kurganov-Petrova (KP) method, which is a second order scheme, is used to solve the Saint-Venant ...
    • Sensor placement and parameter identifiability in grey-box models of building thermal behaviour 

      Brastein, Ole Magnus; Sharma, Roshan; Skeie, Nils-Olav (Journal article; Peer reviewed, 2019)
      Building energy management systems can reduce energy consumption for space heating in existing buildings, by utilising Model Predictive Control. In such applications, good models of building thermal behaviour is important. ...
    • Simulation of the Pyrolysis Process: from Plastic Waste to Environmental Friendly Fuel 

      Andersen, Marius; Sætre, Kai Arne; Fredriksen, Siw Bodil; Pfeiffer, Carlos Fernando (Journal article; Peer reviewed, 2018)
      How to deal with plastic waste is an important question, as it may affect both the climate and environment. A method that may be beneficial to dispose some kinds of plastic waste that cannot be material-recycled is ...
    • Simulation of Transcritical Flow in Hydraulic Structures 

      Agu, Cornelius Emeka; Lie, Bernt; Elseth, Geir (Conference object; Peer reviewed, 2015-11-25)
      In hydraulic engineering, transcritical flows are often required in some applications. One example is in a Venturi channel where the occurrence of critical depth is used to estimate flow rate in the channel. In this paper, ...
    • Simulations and real applications of PI and MPC averaging level control in a water resource recovery facility 

      Haugen, Finn (Journal article; Peer reviewed, 2018)
      The basin level control system in an existing wastewater treatment plant is designed for two different operation modes: compliant level control for smooth pump flow, and stiff level control. Both a model-based predictive ...
    • Small scale arc fault testing of medium voltage metal enclosed switchgear 

      Fjeld, Elin; Hagen, Svein Thore (Journal article; Peer reviewed, 2016-03-16)
      Internal arc fault tests are important for ensuring the safety of medium-voltage metal-enclosed switchgears. Since these tests are conducted at full scale, the costs of the test objects as well as the high-power laboratory ...