Marek Dudyński
University of Warsaw
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Publication
Featured researches published by Marek Dudyński.
Waste Management | 2012
Marek Dudyński; Kamil Kwiatkowski; Konrad Bajer
The poultry waste produced by industrial slaughterhouses typically contains not only feathers, but also a mixture of animal entrails, nails, blood, beaks and whole carcasses. Economical utilisation of this mixture, varying strongly in composition and moisture content, is, in general, difficult. We demonstrate that this awkward material can be successfully used for gasification in a simple, fixed-bed gasifier. The method of gasification, which we developed, enables control of the gasification process and ensures its stability in the operational regime of a working poultry processing plant. The installation, which has been working in Poland for 2 years, utilises 2 tons of feathers per hour and produces syngas of stable composition and fairly high quality. The syngas is burnt in the combustion chamber adjacent to the gasifier. Heat is recuperated in a boiler producing 3.5 tons per hour of technological steam continuously used for the operation of the slaughterhouse. The whole process complies with the stringent emission standards. In the paper we present the end-use device for feather utilisation and describe the underlying gasification and syngas combustion processes. Key elements of the whole installation are briefly discussed. The environmental impacts of the installation are summarized.
Numerical Heat Transfer Part A-applications | 2013
Kamil Kwiatkowski; Bartosz Górecki; Jakub Korotko; Wojciech Gryglas; Marek Dudyński; Konrad Bajer
We consider the pyrolysis of robinia pseudoacacia, which is a common material for biomass gasifiers. We formulate three models of the process, with increasingly detailed physics, best suited for different spatial scales from large to small. For each model, we perform numerical simulations of adaptable complexity and compare the results with the thermogravimetric analysis (TGA) experiments.
Journal of Physics: Conference Series | 2014
Kamil Kwiatkowski; Pawel J. Zuk; Marek Dudyński; Konrad Bajer
We present a new solver biomassGasificationFoam that extended the functionalities of the well-supported open-source CFD code OpenFOAM. The main goal of this development is to provide a comprehensive computational environment for a wide range of applications involving reacting gases and solids. The biomassGasificationFoam is an integrated solver capable of modelling thermal conversion, including evaporation, pyrolysis, gasification, and combustion, of various solid materials. In the paper we show that the gas is hotter than the solid except at the centre of the sample, where the temperature of the solid is higher. This effect is expected because the thermal conductivity of the porous matrix of the solid phase is higher than the thermal conductivity of the gases. This effect, which cannot be considered if thermal equilibrium between the gas and solid is assumed, leads to precise description of heat transfer into wood particles.
Physical Review E | 2016
Bartłomiej Szczygieł; Marek Dudyński; Kamil Kwiatkowski; Maciej Lewenstein; Gerald J. Lapeyre; Jan Wehr
We introduce a class of discrete-continuous percolation models and an efficient Monte Carlo algorithm for computing their properties. The class is general enough to include well-known discrete and continuous models as special cases. We focus on a particular example of such a model, a nanotube model of disintegration of activated carbon. We calculate its exact critical threshold in two dimensions and obtain a Monte Carlo estimate in three dimensions. Furthermore, we use this example to analyze and characterize the efficiency of our algorithm, by computing critical exponents and properties, finding that it compares favorably to well-known algorithms for simpler systems.
Fuel Processing Technology | 2015
Marek Dudyński; Johan C. van Dyk; Kamil Kwiatkowski; Marta Sosnowska
Fuel | 2014
Kamil Kwiatkowski; Konrad Bajer; Agnieszka Celińska; Marek Dudyński; Jakub Korotko; Marta Sosnowska
Flow Turbulence and Combustion | 2013
Kamil Kwiatkowski; Marek Dudyński; Konrad Bajer
Journal of Statistical Physics | 2013
Marek Dudyński
Biomass & Bioenergy | 2013
Kamil Kwiatkowski; Jan Krzysztoforski; Konrad Bajer; Marek Dudyński
Fuel Processing Technology | 2015
Marta Sosnowska; Marek Dudyński; Dariusz Kardaś; Marek Klein; Kamil Kwiatkowski