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An experimental investigation was carried out to study the NO_x formation and reduction by primary measures for five types of biomass (straw, peat, sewage sludge, forest residues/Grot, and wood pellets) and their mixtures. To minimize the NO_x level in biomass-fired boilers, combustion experiments...

This report presents a method for data pre-analysis before estimating parameters in a space-time model for precipitation. The pre-analysis is carried out for daily data from Soth-Western Norway and Hourly data around the Rissa-Radar in Trøndelag. This analysis permits to detect anomalous rain gauges...

SINTEF Energy Research and the Norwegian University of Science and Technology – NTNU have proposed a 150 kWth reactor system design aiming at further development of chemical looping processes. It consists of a double loop circulating fluidized bed, meant to be used as a platform to study atmospheric...

A one-dimensional mathematical model of the R744 two-phase ejector for expansion work recovery is presented in this paper. Governing equations were formulated for all passages of the ejector based on the differential equations for mass, momentum, and energy balance as well as a differential...

As lean premixed combustion systems are more susceptible to combustion instabilities than non-premixed systems, there is an increasing demand for improved numerical design tools that can predict the occurrence of combustion instabilities with high accuracy. The inherent nonlinearities in combustion...

Fish products are frozen to preserve quality and extend shelf-life. However, freezing processes in the industry are typically very energy demanding and seldom optimized with regard to energy usage. During freezing, the operating conditions for the refrigeration cycle, as well as the driving...

In order to evaluate the risk of hydrate formation in CO₂ transport one has to be able to predict the water content in the fluid phase in equilibrium with the CO₂-hydrate. A literature review has identified some knowledge gaps, for example, there are no results available at temperatures lower than...

... “Innovative reactors” (based on chemical looping, membrane separation or sorption-enhanced processes) in power processes for CO₂ capture appear to behave in such a way that some unconverted fuel could remain in the captured CO₂-rich stream. This has the double drawback of adding impurities to the...

Enhanced CO₂ concentration in exhaust gas is regarded as a potentially effective method to reduce the high electrical efficiency penalty caused by CO₂ chemical absorption in post-combustion capture systems. The present work evaluates the effect of increasing CO₂ concentration in the exhaust gas of...

The condition assessment of the 190 MVA, OFWF, step-up generator transformer was performed by the mapping of degree of polymerization (DP). The transformer was taken out of service after 36 years and the active part, (transformer core and windings), was removed from the tank for close examination...

This is a study of the effect of the additives dimethylaniline (DMA) and trichloroethylene (TCE) on the prebreakdown phenomena known as streamers, in a simple base liquid, cyclohexane. This has been done under a step-like impulse voltage in a long point-plane gap. The objective was mainly to find...

This paper presents a framework to find optimal offshore grid expansions using a transportation model of the power grid. The method extends the standard mixed-integer linear programming approach to the solution of the transmission expansion planning problem to account for fluctuations in wind power...

This paper provides detailed comparisons of chemical reaction mechanisms of H₂ applicable at high preheat temperatures and pressures relevant to gas turbine and particularly Alstom’s reheat gas turbine conditions. It is shown that the available reaction mechanisms exhibit large differences in...

The knowledge about pressure-volume-temperature-composition (PVTxy) properties plays an important role in the design and operation of many processes involved in CO₂ capture and storage (CCS) systems. A literature survey was conducted on both the available experimental data and the theoretical models...

Accurate experimental data on the thermo-physical properties of CO₂-mixtures are prerequisites for development of more accurate models and hence more precise design of CO₂ capture and storage (CCS) processes. A literature survey was conducted on both the available experimental data and the...