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Three-dimensional modeling of utility boiler pulverized coal tangentially fired furnace
(Pergamon-Elsevier Science Ltd, Oxford, 2006)
This paper presents selected results of numerical simulations of processes in utility boiler pulverized coal tangentially fired dry-bottom furnace. The simulations have been performed by specially developed comprehensive ...
Condensation induced non-condensables accumulation in a non-vented vertical pipe
(Pergamon-Elsevier Science Ltd, Oxford, 2005)
At the end of the year 2001 the radiolytic gases hydrogen and oxygen accumulated and exploded in non-vented steam pipelines at two nuclear power plants. The HELIO code has been developed for the numerical simulation and ...
Three-dimensional numerical simulation of non-condensables accumulation induced by steam condensation in a non-vented pipeline
(Pergamon-Elsevier Science Ltd, Oxford, 2006)
A substantial increase of the concentration of non-condensable gases in the mixture with steam can occur in a non-vented pipeline due to the condensation. This phenomenon is investigated with the thermal-hydraulic and ...
Three-fluid model predictions of pressure changes in condensing vertical tubes
(Pergamon-Elsevier Science Ltd, Oxford, 2008)
Pressure changes in annular downward flows of condensing steam in vertical tubes are predicted with a three-fluid model. Several available correlations for the steam-liquid film interfacial friction are applied in the ...
Analysis of fouling factor in district heating heat exchangers with parallel helical tube coils
(Pergamon-Elsevier Science Ltd, Oxford, 2013)
This paper presents the results of measurements of thermal performance of 8 heat exchangers with parallel helical coils. Measurements were conducted in substations in 2 district heating systems in Serbia: Belgrade and ...
A numerical investigation of the refrigerant maldistribution from a header towards parallel channels in an evaporator of automotive air conditioning system
(Pergamon-Elsevier Science Ltd, Oxford, 2012)
Evaporators in automotive air conditioning are designed as compact heat exchangers with the aim to cool outside air for the widest possible range of weather conditions. Under low operating loads a non-uniformity of the ...
Investigation on thermal radiation spectra of coal ash deposits
(Pergamon-Elsevier Science Ltd, Oxford, 2009)
This paper deals with thermal radiation properties of ash deposits on a pulverized coal boiler of an electric power plant. Normal emittance spectra in the 2.5-25 mu m interval, and total normal emittance, were measured on ...
Heat transfer rate of direct-contact condensation on baffle trays
(Pergamon-Elsevier Science Ltd, Oxford, 2008)
The paper deals with the experimentally obtained results of the direct-contact condensation of steam in contact with water in cascade column. Baffle trays were used to obtain contact between water and steam in DN 300 column ...
Numerical prediction of critical heat flux in pool boiling with the two-fluid model
(Pergamon-Elsevier Science Ltd, Oxford, 2011)
Three-dimensional numerical simulations of the atmospheric saturated pool boiling are performed with the aim of predicting the critical heat flux. The two-phase mixture in pool boiling is described with the transient ...
Experimental method for determining Forchheimer equation coefficients related to flow of air through the bales of soy straw
(Pergamon-Elsevier Science Ltd, Oxford, 2011)
The paper presents results of experimental investigation conducted to determine permeability coefficient of a porous bed formed by biomass bales, whereby the said coefficient represents one of the most important parameters ...