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Abstract
A scientometric method is developed for studying the intersectional communications at scientific conferences. As an example, a series of multisectional Heat and Mass Transfer Conferences held in Minsk, USSR, during the years 1961–1980 are considered. The clusters of the interplay between the sections are constructed on the basis of the data from the registration cards of the Conference participants. Teh matrix of the topical interrelation of sections enables one to calculate the coefficient of the information impact of a section. A comparison of this coefficient with the resource indicators of sections makes it possible to grade the scientific justification of planning a series of multisectional scientific conferences.
fluidized beds . Heat and Mass Transfer , 48 ( 4 ), 621 – 625 . [4] Davidson J. F. , Harrison D. ( 1963 ), Fluidized Particles . New York
thermal decomposition, and volatile matter has not been released. Heat and mass transfer in this stage could be expressed as follows: biomass continues to heat up at the constant heating rate and the moisture diffuse rapidly toward the surface to satisfy
Experimental and numerical analysis of wood thermodegradation
Mass loss kinetics
. Mathematical formulation Modeling of the heat and mass transfers Wood is a complex material whose thermodegradation involves a series of chemical reactions with coupled heat and mass transfer. This section is devoted to the
transition enthalpies and temperatures, or those for which no phase transition can be observed calorimetrically are referred to as bound water. Recent investigation has proven that the ideal conditions for minimizing heat and mass transfer effects were a
Abstract
The experimental analysis of conventional conduction calorimeters shows excellent reproducibility and relevant systematic errors in comparison with thermodynamic values established via adiabatic calorimeters. Two examples: a DSC and a liquid flow device are schematically analyzed. When an increased accuracy will be obtained the positional effects on the experimental set-up and on the measurement process need to be modelled. From experimental measurements realized on the Xensor liquid nano-calorimeter representative models can be built. To evaluate the reliability of measurement routines, established from experimental basis, several different dissipation structures inside the working space can be simulated. Two experimental configurations related to drop to drop reaction and to continuous mixing are modelled via RC approach. The RC formalism is extended to evaluate the carried energy effect produced by the continuous inflow/outflow of reactants in the mixing enthalpy chamber.
Abstract
Some peculiar properties of lithium sulfate monohydrate dehydration kinetics are investigated. Experiments were carried out under both isothermal and non-isothermal conditions on the bulk single crystals (
1 cm). Under both heating modes some new data were obtained. Uncommon high dehydration process rate under isothermal conditions and linear dependence of this rate under non-isothermal ones were discovered. Experiments over the water saturated porous ceramics drying and over the water vapors transmitting through the layer of preliminary dehydrated lithium sulfate were carried out. It is attempted to explain observed phenomena considering heat- and mass-transfer conditions.
Abstract
Due to the experimental errors, the chemical effect of minor reactions, and some physical effects of heat and mass transfer, there usually exists much noise in the mass loss data resulted from thermal decomposition experiments, and thus high quality smoothing algorithm plays an important role in obtaining reliable derivative thermogravimetric (DTG) curves required for differential kinetic analysis. In this paper three smoothing methods, i.e. Moving Average smoothing, Gaussian smoothing, and Vondrak smoothing, are investigated in detail for pre-treatment of biomass decomposition data to obtain the DTG curves, and the smoothing results are compared. It is concluded that by choosing reasonable smoothing parameters based on the spectrum analysis of the data, the Gaussian smoothing and Vondrak smoothing can be reliably used to obtain DTG curves. The kinetic parameters calculated from the original TG curves and smoothed DTG curves have excellent agreement, and thus the Gaussian and Vondrak smoothing algorithms can be used directly and accurately in kinetic analysis.
-equilibrium condensation in transonic steam flow, International Journal of Heat and Mass Transfer , Vol. 47, 2004, pp. 2217–2231. Gerber A.G. A pressure based Eulerian-Eulerian multi-phase model
. ( 2006 ), Sorption properties for different types of molecular sieve and their influence on optimum dehumidification performance of desiccant wheels . International Journal of Heat and Mass Transfer , 49 , 2802 – 2809 . [9
