- Type of paper
: Paper in journal
Title: MODELLING OF TILE DRYING KINETICS
- Authors:
- Skansi, Darko (43452)
- Tomas, Sreko (154264)
Journal: KEMIJA U INDUSTRIJI
Number: 9
ISSN: 0022-9830
Volume: 41
Year: 1992
Pages: from 369 to 375
Number of references: 22
Language: hrvatski
Summary: The kinetics of the convection drying of the flat roof
tile
in the industrial coditions has been examined.
In need of determination of the maximum allowed drying rate
of the wet tile in the first period of drying, four diferent
velocities movement of the sample through the dryer has been
taken.
The experimental results were approximated in a whole
process with the exponential model
B(t) = B(0)EXP(-bt2)
and it's derivation
(-dB/dt) = 2btB(t)
The model performed has a real phisical meaning.
The authors suggest the application of the model for
description of the kinetics of the drying process.
Keywords: drying kinetics, convective drying, modelling of drying kinetics, clay tile.
- Type of paper
: Paper in journal
Title: CONVECTION DRYING KINETICS OF POROUS MATERIALS
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
- Sokele, Mladen
Journal: ZNANOST I PRAKSA U POLOPRIVREDI I PREHRAMBENOJ TEHNOLOGIJI
Number: 3
ISSN: 0352-1346
Volume: 22
Year: 1992
Pages: from 505 to 518
Number of references: 19
Language: hrvatski
Summary: The classical approach in describing convection drying
kinetics of porous materials based on a constant and dropping
drying rate does not provide satisfactory results as regards
practical drying process. Aiming at the description of convection
drying kinetics of porous materials as a unique process of
transforming a liquid mass into a gaseous one, accompanied by a
simultaneous heat transfer, the possiblity of applying an
exponential model was investigated:
(t) = aEXP(-btn)
(-d(t)/dt) = knt(n-1)(t).
Acceptability of this model applied for description of
kinetics of the total process was done for experimental purposes
concerning convection drying of various porous materials, e.g.
carrots, plums, fodder yeast and clay.
Keywords: convection drying kinetics, porous materials.
- Type of paper
: Paper in journal
Title: GRAPHO-ANALYTICAL MODEL FOR OPTIMIZATION OF THE FIRST
PERIOD OF DRYING CERAMICS MATERIAL
- Authors:
- Skansi, Darko (43452)
- Tomas, Sreko (154264)
Journal: KEMIJA U INDUSTRIJI
Number: 1
ISSN: 0022-9830
Volume: 42
Year: 1993
Pages: from 9 to 12
Number of references: 9
Language: hrvatski
Summary: Convective drying for roof flat tiles in a tunnel
dryer bymonitoring the mean process parameters has been
studiedexperimentally.
Varying the temperature and relative air humidity, and themoving
velocity of the drying material, the maximum drying ratefor the first
period of drying, as a function of the freemoisture fraction, has been
found.
The experimental data reported certainly help construct
agrapho-analytical model for process optimization.
The model has been tested in industrial roof flat tiledrying process.
Keywords: drying optimization, grapho-analitical model, ceramics material.
- Type of paper
: Paper in journal
Title:
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
- Sokele, Mladen
Journal: DRYING TECHNOLOGY
Number: 6
ISSN: 0737-3937
Volume: 11
Year: 1993
Pages: from 1353 to 1369
Number of references: 24
Language: engleski
Summary: Kinetics of the convection drying process of flat tile
has
been investigated experimentally in an industrial tunnel dryer.
Several velocities of wet tile movement through the dryer were
tested to obtain maximum allowable drying rate curve. As there
are various models to describe the kinetics of convection drying,
finding a model that would fairly well approximate the kinetics
of the whole drying process was part of the research. Especially
the polynomial and exponential models were tested.
It was found that exponential model of the type:
B(t) = (a-Be)EXP(-bt2)+Be,
(-dB(t)/dt) = 2bt(B(t)-Be)
significantly correlates the kinetics of the whole tile drying
process.
Applying the maximum allowable drying rate curve obtained
for flat tile in the first period of drying, a grapho-analytic
model for the optimal conducting of the process has been
developed.
Keywords: drying, kinetics, modelling, clay, tile, optimization.
- Type of paper
: Paper in journal
Title: KINETICS OF CONVECTIVE DRYING OF POROUS MATERIAL
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
- Sokele, Mladen
Journal: CERAMURGIA
Number: 5
ISSN: 0045-6152
Volume: 23
Year: 1993
Pages: from 218 to 224
Number of references: 25
Language: talijanski
Summary: The kinetics of convection drying of flat tile has
been
investigated experimentally an industrial tunnel dryer. It was
found that exponential model of the type:
B(t) = aEXP(-bt2),
(-dB(t)/dt) = 2btB(t)
has physical and significance correlates the kinetics of the
whole tile drying process.
Applying the maximum allowed drying rate curve obtained for
flat tile in the first period of drying, a grapho-analytic model
for the optimal conducting of the process has been developed.
Keywords: kinetics, convective drying, optimization, porous material.
- Type of paper
: Paper in journal
Title:
- Type of paper
: Paper in journal
Title:
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
Journal: CHEMICAL AND BIOCHEMICAL ENGINEERING QUARTERLY
Number: 2
ISSN: O352-9568
Volume: 8
Year: 1994
Pages: from 63 to 67
Number of references: 20
Language: engleski
Summary: The microwave drying of raw clay in shape of plates
has been
experimentally investigated by the method of gravimetry,
following simultaneously the temperature of the samples. At given
power microwave heating, experiments of varying duration have
been performed. The measuring enabled the construction of the
kinetic drying curve: moisture content as a function of time,
drying rate as a function of time and moisture content, and
temperature of the samples as a function of time and moisture
content.
It was found that a model of the following type:
= aEXP(-ktn)
(-d/dt) = knt(n-1)
satisfies the kinetics of the entrie process of microwave drying,
and that its parameters have phenomenological sense.
The presented results are of significant help for the
quantitative description and analysis of the investigated
process.
Keywords: drying, microwave heating, drying kinetics, clay
- Type of paper
: Paper in journal
Title:
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
- Sokele, Mladen
Journal: INDUSTRIAL CERAMICS
Number: 2
ISSN: 1121-7588
Volume: 14
Year: 1994
Pages: from 47 to 53
Number of references: 25
Language: engleski
Summary: The kinetics of the convection drying process of flat
tiles
has been investigated by experimentation in the industrial tunnel
dryer. During this process, various velocities of the damp tiles
movement through the dryer have been chosen, with the aim of
getting the curve of the maximum allowed rate of drying, in given
conditions. As there are various models for the kinetics of
convectional drying, which corespond with the realistic process
of drying, leaves space for further research, a model that could
approximate the kinetics of the total process of drying had to
be found. The possibility of polynomial and exponential model
application has been researched for that purpose.
It has been found out that the exponential model of the type
is:
B(t) = aEXP(-bt2),
respectively
(-dB(t)/dt) = 2btB(t)
has the physical sense and that it correlates the kinetics of the
total process of tile drying very well.
According to the achieved curve of the maximum allowed
drying rate of flat tile, a grapho-analytic model for the optimal
conducting of the process in the first period of drying has been
developed.
Keywords: drying of flat tile, industrial tunnel dryer.
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Skansi, Darko (43452)
- Tomas, Sreko (154264)
Proceedings title: 6th MEDITERRANEAN CONGRESS ON CHEMICAL ENGINEERING
Language: engleski
Place: BARCELONA, SPAIN
Year: 1993
ISBN/ISSN: B-32.328
Pages: from 751 to 752
Meeting: 6th MEDITERRANEAN CONGRESS ON CHEMICAL ENGINEERING
Held: from 10/18/93 to 10/20/93
Summary: The experimental investigation of microwave draying of
flatclay plate has been made.
The microwave power dilivered to clay sample was rangingfrom 10 to 33
W/kg(dry basis).
The moisture content vs time and temperature of the slab vstime were
measured.
An exponential model was used to describe the dryingcurve. Because of
good agreement between the experimental andcalculated product moisture
content, model was used to calculatethe drying rate vs time curve by
differentiating. Thecoefficients of the selected model have phisical sense,
and thereare linear functions with output power of a microwave heating.
Keywords: chemical engineering, clay, drying kinetics, microwave drying, regression.
- Type of paper
: Paper in proceedings
Title:
- Authors:
- Skansi, Darko (43452)
- Bajza, eljko
- Arapovi, Aleksandra
- Editors
- Heidemann, E.
- Heidemann, E.
- Pauckner, W.
- Reich, G.
Proceedings title: XXIII IULTCS CONGRESS
Language: engleski
Place: FRIEDRICHSHAFEN, NJEMAKA
Year: 1995
Pages: from 35-1 to 35-17
Meeting: XXIII IULTCS CONGRESS
Held: from 05/15/95 to 05/20/95
Summary: The microwave drying of industrialy prepared leather
has been experimentally investigated in laboratory scale.
The experiments were performed at three different microwave heating
power. Measuring the mass of the sample through the drying duration, the
kinetics drying curves were obtained.
For correlation of experimental results the exponential model
X=(a-Xeq)exp(-b td)+Xeq
and its differential form has been applied.
Results obtained show high level of correlation, and strong
relationship between applied microwave power and drying time (rate), type
of leather sample and their pretreatement (vacuum and sidewise dewatering).
Keywords: drying, kinetics, leather, microwave heating.
- Type of paper
: Summary in proceedings
Title: MICROWAVE CLAY DRYING
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
Proceedings title: SINOPSISI
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 319 to 319
Meeting: XIII SKUP HRVATSKIH KEMIARA
Held: from 02/08/93 to 02/10/93
- Type of paper
: Summary in proceedings
Title: COMPARISON OF MICROWAVE AND CONVECTION DRYING KINETICS
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
Proceedings title: RUIKINI DANI - SINOPSISI RADOVA
Language: hrvatski
Place: BIZOVAKE TOPLICE, HRVATSKA
Year: 1993
Pages: from 79 to 80
Meeting: SASTANAK KEMIARA I TEHNOLOGA SLAVONIJE I BARANJE
Held: from 09/23/93 to 09/24/93
- Type of paper
: Summary in proceedings
Title: NUMERICAL INTERPRETATION OF THE PROPERTIES OF HUMID AIR
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
Proceedings title: RUIKINI DANI - SINOPSISI RADOVA
Language: hrvatski
Place: BIZOVAKE TOPLICE, HRVATSKA
Year: 1993
Pages: from 81 to 82
Meeting: SASTANAK KEMIARA I TEHNOLOGA SLAVONIJE I BARANJE
Held: from 09/23/93 to 09/24/93
- Type of paper
: Summary in proceedings
Title: SIMULATION OF MICROWAVE DRYING OF POROUS MATERIAL
- Authors:
- Skansi, Darko (43452)
- Tomas, Sreko (154264)
Proceedings title: ZBORNIK SAETAKA RADOVA
Language: hrvatski
Place: Opatija
Year: 1993
Pages: from 66 to 66
Meeting: OD UZORKA DO PODATAKA I INFORMACIJE
Held: from 10/20/93 to 10/23/93
- Type of paper
: Summary in proceedings
Title: MODELLING OF CONVECTIVE DRYING CINETICS OF POROUS
MATERIJAL
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
- Sokele, Mladen
Proceedings title: ZBORNIK SAETAKA RADOVA
Language: hrvatski
Place: Zagreb
Year: 1992
ISBN/ISSN: 953-6065-00-2
Pages: from 63 to 63
Meeting: MODELI NEIZOTERMNIH PROCESA
Held: from 11/20/92 to 11/20/92
- Type of paper
: Summary in proceedings
Title:
- Authors:
- Tomas, Sreko (154264)
- Skansi, Darko (43452)
Proceedings title: CROATIEN CONGRESS OF FOOD TECHNOLOGISTS, BIOTECHNOLOGISTS AND NUTRITIONISTS, ABS
Language: engleski
Place: Zagreb
Year: 1994
Pages: from 13 to 14
Meeting: CROATIAN CONGRESS OF FOOD TECHNOLOGISTS, BIOTECHNOLOGISTS AND NUTRITIONISTS
Held: from 06/15/94 to 06/17/94
Summary: With regard to informatics technology use for analysis,
simulation and process
control in modern process engineering it is necessary to have mathematical
models. This
was initiative to investigate the possibility of use exponential function
(t) = aEXP(-ktn),
(-d(t)/dt) = nkt(n-1)(t)
as mathematical model for food products drying kinetics. In this matter the
numerical
regression method was used. It was found that this exponential function can
be
successfully used as mathematical model for drying of barley, malt, carrot
and pea in
fluidized bed with vibrating screen and plum drying in deep fixed bed. This
attend to
possible application of this model as one of the fundamentals for
simulation an process
control of food products drying.
Keywords: modelling of drying kinetics, food products, drying curve.
- Type of paper
: Ph.D.
Title: MICROWAVE AND CONVECTION DRAYING KINETICS OF POROUS
MATERIALS
Faculty: FAKULTET KEMIJSKOG INENJERSTVA I TEHNOLOGIJE SVEUILITE U ZAGREBU
Date of defense: 07/06/93
Language: hrvatski
Number of pages: 167
Summary: The aim of this paper was to investigate and analyze
microwave and convection drying kinetics of porous materials on
laboratory scale. A wet clay plate was chosen as a representative
of porous materials.
General statements as regards a drying process, whether on
a theoretical or analytical level, phenomenological or empirical,
still presents on open issue. This is specially true for
microwave drying. Modelling was based on elementary layer theory
adapted to practical cases of wet plates drying of porous
materials both in a laboratory convection dryer and laboratory
test apparatus for microvave drying.
During the drying process of shaped porous materials, it is
inevitable to have knowledge of maximum allowed drying rate curve
which can be only obtained by experimentation. Taking this into
account special attention was payed to finding out the maximum
allowed drying rate curve both for convection and microwave
drying. It is, thereby, necessary to have a model that can
sufficiently approximate experimental data enabling thus kinetics
drying simulation. Such semi-empirical model for convection and
microvave drying. It presents one of the inevitable mathematical
expressions necessary for establishing one comprehensive model
for porous material drying.
Keywords: chemical engineering, clay, convection drying, dielectric heating, drying kinetics, heat and mass transfer, microwave drying, regression, simulation.
- Type of paper
: Mentorship
Title: MICROWAVE AND CONVECTION DRYING KINETICS OF POROUS
MATERIALS
Faculty: FAKULTET KEMIJSKOG INENJERSTVA I TEHNOLOGIJE SVEUILITE U ZAGREBU
Mentor: ADLER NEVENKA
Date of defense: 07/06/93
Number of pages: 167
Author: Tomas mr.dipl.in.kem.tehnologije Sreko
Degree level: Ph.D.
- Type of paper
: Mentorship
Title: EXPERIMANTAL INVESTIGATION OF THE VACUUM DRYING KINETICS
OF KETOPROFEN
Faculty: FAKULTET KEMIJSKOG INENJERSTVA I TEHNOLOGIJE SVEUILITE U ZAGREBU
Mentor: SKANSI DARKO
Date of defense: 04/19/95
Number of pages: 91
Author: Pudi dipl. in. Ivan
Degree level: M.A.
- Type of paper
: Mentorship
Title: INVESTIGATION OF DRYING PROCES
Faculty: FAKULTET KEMIJSKOG INENJERSTVA I TEHNOLOGIJE SVEUILITE U ZAGREBU
Mentor: SKANSI DARKO
Date of defense: 06/27/95
Number of pages: 60
Author: iklui Sanja
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: FAKULTET KEMIJSKOG INENJERSTVA I TEHNOLOGIJE SVEUILITE U ZAGREBU
Mentor: SKANSI DARKO
Date of defense: 06/28/95
Number of pages: 56
Author: Grebenar Ivica
Degree level: D.A.
- Type of paper
: Mentorship
Title:
Faculty: FAKULTET KEMIJSKOG INENJERSTVA I TEHNOLOGIJE SVEUILITE U ZAGREBU
Mentor: SKANSI DARKO
Date of defense: 09/29/95
Number of pages: 44
Author: Cvrtila eljka
Degree level: D.A.
- Type of paper
: Computer program
Title:
- Authors:
- Tomas, Sreko (154264)
Programming language: QUICK BASIC
Year: 1993
- Type of paper
: Other
Title: HIGHFREQUENCY DIELECTRIC DRYING
- Authors:
- Skansi, Darko (43452)
Type of work: JAVNO PREDAVANJE, PLIVA-ZAGREB, 18. 12. 1992.
Language: hrvatski
- Type of paper
: Other
Title: COMPUTER PROGRAM SUPPORT FOR MODELLING AND NUMERICAL
INTERPRETATION OFTHE KINETICS OF DRYING PROCESS
- Authors:
- Tomas, Sreko (154264)
Type of work: PAKET PROGRAMA ZA RAUNALO, izraenih u QuickBASIC. Objavljeno u Diser. Tomas, S
Language: hrvatski
- Type of paper
: Other
Title: CONTRIBUTION TO THE MICROWAVE DRYING EXPERIENCES WITH
POROUS MATERIALS
- Authors:
- Tomas, Sreko (154264)
Type of work: JAVNO PREDAVANJE, Drutvo hrvatskih inenjera, podr. Osijek
Language: hrvatski
- Type of paper
: Other
Title:
- Authors:
- Tomas, Sreko (154264)
Type of work: Javno predavanje
Language: hrvatski
- Type of paper
: Other
Title:
- Authors:
- Tomas, Sreko (154264)
Type of work: Javno nastupno predavanje za izbor za docenta
Language: hrvatski
