Blar i Institutt for prosess-, energi- og miljøteknologi på utgivelsesdato
Viser treff 1-20 av 343
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Re-initiation of detonation across an inert region
(Doktor ingeniøravhandling;374, Doctoral thesis, 1985)Re-initiation of gaseous C-J detonation waves across a region of air has been studied experimentally. The experimental apparatus consisted of a 9 meter long square tube with internal dimensions of 125 mm. The Random Choice ... -
Nosé-Hoover simulations of aqueous mixtures of small alcohols
(Doctoral thesis; Peer reviewed, 1996)We have performed constant energy and constant temperature equilibrium molecular dynamics simulations of model liquids of water, methanol, and ethanol, and of the binary aqueous mixtures of the alcohols at mole fractions ... -
The Influence of the Physical Characteristics of Particulate Materials on their Conveyability in Pneumatic Transport Systems
(Doctoral thesis; Peer reviewed, 1996-12)The aim of the investigation has been to establish a link between the physical characteristics of particulate materials, measurable on small samples in a laboratory, and the conveyability of these materials in a pneumatic ... -
The impact of staged combustion on the operation of a precalciner cement kiln
(Doctoral theses at NTNU;1999:89, Doctoral thesis; Peer reviewed, 1999)In this thesis, the impact of staged combustion on the operation of a precalciner cement kiln, is considered. Mathematical modelling and full-scale experiments at the Norcem cement works in Brevik, Norway, is the basis for ... -
Durability of selected membrane materials when exposed to chlorine gas
(Doctoral thesis; Peer reviewed, 2001)This thesis is focusing on the durability of selected membrane materials when exposed to chlorine gas in the temperature range 30-100°C. Studies of the changes of membrane separation properties and the mechanisms promoting ... -
Assessment of sulphur emission at Norcem's cement kiln by use of 35S-tracer
(Conference report, 2001)Although sulphur is not a major reacting species in making cement clinker, it is introduced as a pollutant in both the energy carrier (oil, coke, coal, household waste) and in the reactants (chalk, silica). Due to the ... -
Energy recovery from wastes : experience with solid alternative fuels combustion in a precalciner cement kiln
(Conference report, 2001)Today virtually all cement clinker burning processes take place in rotary kilns. A mixture of calcareous and argilaceous materials is heated to a temperature of about 1450 °C. In this process decarbonation followed by ... -
Quantification of biofilm accumulation by an optical approach
(Journal article; Peer reviewed, 2001-02)Methods for non-invasive, in situ, measurements of biofilm optical density and biofilm optical thickness were evaluated based on Pseudomonas aeruginosa experiments. Biofilm optical density, measured as intensity reduction ... -
Investment cost estimates and investment decisions
(Journal article; Peer reviewed, 2002)When evaluating new investment projects, oil companies traditionally use the discounted cashflow method. This method requires expected cashflows in the numerator and a risk-adjusted required rate of return in the denominator ... -
Effect of alternative fuel properties on NOx reduction
(Conference report, 2002)Today we see a substantial increase in the use of alternative fuels in the cement industry. The prospect of reduction in fuel costs and the environmental benefits of waste to energy conversion are the driving forces. For ... -
Recruiting engineering students from vocational school
(Conference report, 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 ... -
Assessment of mercury emission at Norcem's cement kiln by use of 203 Hg tracer
(Conference report, 2005)In manufacture of cement clinker, mercury (Hg) is introduced in the cement kiln system via the fuels and as constituents in the raw materials, i.e. limestone, iron ore, etc. The permissible emission of Hg to air is very ... -
A Mathematical Theory for Mixing of Particulate Materials
(Doctoral thesis, 2006)A theoretical framework for sampling theory is developed. In this relation, concepts like mixture heterogeneity and representative samples are mathematically defined. Further, the relation between Gy's concepts of accuracy ... -
Hydrogen gas explosions in pipelines, modeling and experimental investigations
(Doctoral thesis; Peer reviewed, 2006)Gas explosions in closed pipes with a single obstacle have been investigated both numerically and experimentally. Most of the work is related to hydrogen and air mixtures, but other fuels have also been used. At the present ... -
Burning chamber installation for increased use of alternative fuels at Norcem Brevik, Norway
(Conference report, 2006) -
Effects of initial molecular weight on removal rate of dextran in biofilms
(Journal article; Peer reviewed, 2006-05)Degradation kinetics of different size dextrans in a biofilm reactor were evaluated. Degradation rates of dextran standards, measured as time series of oxygen utilisation rates (OUR), decreased with increasing initial ... -
Simulation of flame acceleration in an obstructed tube with LES
(Conference object; Peer reviewed, 2007) -
Simulation of flame acceleration and DDT in H-2-air mixture with a flux limiter centered method
(Journal article; Peer reviewed, 2007)Flame acceleration and deflagration to detonation transition (DDT) is simulated with a numerical code based on a flux limiter centered method for hyperbolic differential equations. The energy source term is calculated by ... -
Industry/college cooperation on undergraduate project work as a college revenue source
(Conference report, 2007)Since 1994, the Norwegian Ministry for Education and Research has required government supported universities and colleges to find additional sources of income. For Telemark University College (TUC) in Porsgrunn, senior ... -
Carbon dioxide emission reduction by increased utilization of waste-derived fuels in the cement industry
(Conference report, 2007)Considerable reductions in Norway's emissions of greenhouse gases like CO2 are required to meet the commitments of the Kyoto Protocol. CO2 emissions from cement clinker production originate from decarbonation of limestone ...