- Type of paper
: Paper in book
Title: THERMAL TURBOMACHINEY
- Authors:
- Guzović, Zvonimir (113641)
- Guzović, Zvonimir (113641)
- Majcen, Marko
- Editors
- Majcen, Marko
Publisher: LEKSIKOGRAFSKI ZAVOD MIROSLAV KRLEŽA
Number of references: 13
Language: hrvatski
Keywords: Steam turbines, Gas turbines
Other: Tekst je za tiskanje prihvaćen u lipnju 1995. godine.
- Type of paper
: Paper in proceedings
Title: Heat pipe theory and application
- Authors:
- Guzović, Zvonimir (113641)
- Editors
- Smolčić Žerdik, Zora
Proceedings title: Zbornik radova fakulteta strojarstva i brodogradnje
Language: hrvatski
Place: Zagreb
Year: 1992
ISBN/ISSN: 0350-3097
Pages: from 183 to 195
Meeting: Zbornik radova, fakulteta strojarstva i brodogradnje
Held: from 05/28/92 to 05/28/92
Summary: Physical phenomena and theoretical bases pertinent
tothe heat pipe application are given in the paper. The heat pipeis a
self-contained technical device possessing better hatconductivity that any
element made of a uniform piece of anyavailable material. Its purpose is
efficient heat transfer fromone place to another with a temperature
gradient as small aspossible. Some typical examples of heat pipe
applications arepresented. Nowadays ,heat pipes have extensive applications
suchas: in waste energy recovery system, solar collectors,utilization of
geothermal energy, heat exchanger,electic/electronic equipment and devices,
industrial machines andequipment, engines and vehicles, aviation and
spacecraftengineering, civil engineering, medical treatment and others.
Keywords: Heat Pipe
- Type of paper
: Paper in proceedings
Title: The influence of the cooling channel design on flow rate
of cooling media in synchronous machines
- Authors:
- Pavličević, Milorad (35543)
- Matijašević, Branimir (29640)
- Editors
- Srb, Neven
Proceedings title: Međunarodno savjetovanje o elektromotornim pogonima
Language: hrvatski
Place: Brijuni, Hrvatska
Year: 1992
ISBN/ISSN: 621.313.13
Pages: from 45 to 49
Meeting: Međunarodno savjetovanje o elektromotornim pogonima
Held: from 10/13/92 to 10/15/92
Summary: The influence of the cooling channel design on flow
rate ofcooling media in synchronous machines.
Summary: Yhis paper deal with results of an analises of acharasteristical
design in air cooled synchronous machines. Ananalyses was performed to
determine the influence of shape or geometry of cooling channel and type of
fans to flow rate ofcoolin media.
The computed value good agreement with those measured on anrealized
object. It is pointed out the way of the optimizeddesign of the cooling
system.
Keywords: Synchronous machines
- Type of paper
: Paper in proceedings
Title: Heat pipe theory and application at electric motor and
equipment
- Authors:
- Guzović, Zvonimir (113641)
- Editors
- Srb, Neven
Proceedings title: VI međunarodno savjetovanje o elektromotornim pogonima
Place: Brijuni, Hrvatska
Year: 1992
ISBN/ISSN: 621.313.13
Pages: from 91 to 96
Meeting: Međunarodno savjetovanje o elektromotornim pogonima
Held: from 10/13/92 to 10/15/92
Summary: Physical phenomena and theoretical bases pertinent
tothe heat pipe application are given in the paper. The heat pipeis a
self-contained technical device possessing better hatconductivity that any
element made of a uniform piece of anyavailable material. Its purpose is
efficient heat transfer fromone place to another with a temperature
gradient as small aspossible. Some Typical examples of heat pipe
application atelectric motor, and electric equipment and device are
presented.
Keywords: Heat pipe, electric motor
- Type of paper
: Paper in proceedings
Title: Flow velocities computation inside a complexly shaped
furnace with boundary condition approximation
- Authors:
- Martinis, Vinko
- Novko, Igor
- Editors
- Štambuk - boršić, Neda
Proceedings title: 38. Međunarodni godišnji skup KoREMA
Language: hrvatski
Place: Zagreb
Year: 1993
Pages: from 580 to 583
Meeting: 38. Međunarodni godišnji skup KoREMA
Held: from 04/26/93 to 04/28/93
Summary: The application of nonperpendicular nets usual
computingnumerical problems with two-dimensional domain inthree-dimensional
case leads to serious difficulties whentransferring real nets into
numerically perpendicular ones. Inthis paper a perpendicular net relevant
to furnace volume isretained so that differential equations discretisation
isstandard. As nodal points do not always fall into domain'sboundary the
approximation of boundary conditions is carried outat domain's nodal points
that are closest to the boundary. Thatway a three-dimensional problem does
not really differ from thetwo-dimensional problem. Such an approach is
applicable withother methods of discretisation and equation system
computation.In this paper a numerical solution of mathematical model of
acomplexly shaped furnace by numerical compression method isshown.
Keywords: Nonperpendicular net, furnace, numerical compression method
- Type of paper
: Paper in proceedings
Title: High speed castin; A new technology revolution with DANAM
muuld
- Authors:
- Matijašević, Branimir (29640)
- Pavličević, Milorad (35543)
- Editors
- Brmakomb, J.K.
Proceedings title: Near-Net-Shape Casting in the Minimills
Language: engleski
Place: Vancouver, British Columb, Kanad
Year: 1995
Pages: from 205 to 215
Meeting: INTERNATIONAL SYMPOSIUM ON NEAR-NET-SHAPE CASTING IN THE MINIMILLS
Held: from 08/19/95 to 08/23/95
Summary: The technology of continuos castin always shows the aim to
increase the castin speed, that means strand productivity, in conjction
with better internal and surface quality of the cast product.
The result of the development made by Danilei is a casting technology whose
key points are a new concept for cooling the mould and a new mould itself.
this new mould is aclled Adaptable, because it is able to "adapt" its
original taper to the billet shrinkage. This effect is controlled by the
pressure of the mould cooling water.
This innovative design allows to increase the casting speed substantialy.
Moreover, the mould is able to cast a wide range of steel grades and
casting speed, without altering other process parameters.
Keywords: continuos castin, mould, coolig
- Type of paper
: M.A.
Title: MODELING OF THE TRANSIENT THERMAL AND MECHANICAL PROCESSES
IN THE ROTOR OF THERMAL TURBINE
Faculty: Fakultet strojarsva i brodogradnje Sveučilište u Zagrebu
Author: NOVKO IGOR
Date of defense: 01/30/95
Language: hrvatski
Summary: This Master Thesis deals with the modulation process of
thermal and mechanical transition processes in changed working systems of
steam and gas turbines. The entire modulation process can be demonstrated
for the steam turbine rotor. The described algorithm can be used, extended
and restructured if necessary, in modulation of other elements of steam or
gas turbines (turbine housings, regulation valves, blade canals etc.).
The physical model has a two-dimensional organization. Two program- packets
were used in the analysis based on the finite elements method, namely EMRC
NISA ver. 93 and SWANSON ANSYS ver. 5.0A. The modeling included
pre-processing which permit to define the geometry of the object’s domain
and production of the finite elements mesh. As convenient correlation’s
describing the transition of heat on certain parts of steam turbine rotor
have been used for determination of thermal limit boundary conditions.
Mechanical boundary conditions are based on constructional and functional
characteristics of the rotor.
A post-processing of compared results, depending of the variable effect of
working condition of steam turbine on both thermal and mechanical rotor
condition has produced outstandingly harmonious compatibility of both
computer programs. In addition, and because of an easier evaluation of
archived results, the MS EXCEL program has been used in post-processing.
Consequently, the results of analysis of physical temperature fields,
thermal flows, thermal dilatation’s, strains and stresses in the domain
could be plotted in one-dimensionally form.
The thesis has shown that the existing professional packets can be used
successfully for the analysis of physical phenomena’s on engineering
structures. The quality of the analysis depends to a large extent on our
knowledge of physical processes relevant for the structures being analyzed,
plus the program packets used and pre-knowledge needed for their
implementation. This is then used in determination of boundary conditions.
Special attention and knowledge of theoretical support of the analyzed
physical fundamentals is needed for final conclusions about the state of
the structure.
- Type of paper
: Survey/Study
Title:
- Type of paper
: Survey/Study
Title: ANALYSE OF MECHANICAL STRESSES IN STEAM TURBINE 30 MW IN
POWER PLANT SOSTANJ
Ordering party: Matkonerg
Institution depot: Fakultet strojarstva i brodogradnje
Year: 1993
Number of pages: 120
Language: hrvatski
- Type of paper
: Survey/Study
Title: Water cooling Techniques in electric arc furnace for ultra
hih power operatin
- Authors:
- Guzović, Zvonimir (113641)
- Matijašević, Branimir (29640)
- Novko, Igor
- Ruševljan, Miroslav
Ordering party: Danieli & C.
Institution depot: Fakultet strojarstva i brodogradnje
Year: 1995
Number of pages: 140
Language: engleski
Summary: Water-cooled panels are usually used at the roof and the
wall of high powered electric arc furnaces. Previously used panels, lined
with refractory bricks, are modified today so that more than 90% of all
furnaces are equipped with water-cooled panels. Various types of panels and
different condition during exploation require seriously undertaken analyses
of heat transfer conditions inside the furnaces as well as on the water
side. The eim of this work is the sreation of necessary tools that hawe to
be used in the comlete analyises of the existing and new designed
water-cooled device in high power operation electric arc furnaces in sense
of increasing its productivity and life duration.
Keywords: Electric arc furnace, panels, water cooleing
- Type of paper
: Survey/Study
Title: Investigation of continuos casting with elastic mould
- Authors:
- Guzović, Zvonimir (113641)
- Matijašević, Branimir (29640)
- Novko, Igor
- Ruševljan, Miroslav
Ordering party: Danieli & C.
Institution depot: Fakultet strojarstva i brodogradnje
Year: 1995
Number of pages: 256
Language: engleski
Summary: The increasing of the casting speed in continuos casting
technology, together with better internal and surface quolity of the
products, has a priority in the new design of the castin device.
The greatest resistance in heat extraction from the bille appears in air
gap between solid shell of the billet and iner surface of the mould.
The new designed mould allows deformation of its walls and a air gap can be
kept appropriate small in different situation and location.
Large series of the calculation was performed to define the optimal shape
and dimension of the mould.
Keywords: Continuos casting, mould, cooling
- Type of paper
: Survey/Study
Title: New aproach to design of water cooled bottom electrode for
DC funace
- Authors:
- Guzović, Zvonimir (113641)
- Matijašević, Branimir (29640)
- Ruševljan, Miroslav
- Novko, Igor
Ordering party: Danieli & C.
Year: 1995
Number of pages: 163
Language: engleski
Summary: The most delicate part of the DC arc furnace is the pottom
electrode. DC current with more than 80 kA has to be transported through
melt from top to bottom electrode. At the same time the materijal of the
electrode is under high thermal as well as electrical loadings. Last one
generete electrodynamics forces due to which the melt on top of the
electrode will be stired.
There are developed several types of bottom electrode all with some
advantages and disadvantages. With increasing loading air cooling become
insufficient, so only different type of watercooled electrode or
electrically conductive refractoriness electrode are in use.
In these article some possibilities for increasing of heat conduction in
billet type bottom electrode due to presevation of appropriate solid steel
thickness of electrode are presented.
Keywords: Electric arc furnace, bottom electrode, cooling
- Type of paper
: Other
Title: Steam and Gas Turbines
- Authors:
- Guzović, Zvonimir (113641)
- Guzović, Zvonimir (113641)
Type of work: Članak u knjizi (tehnička enciklopedija)
Language: hrvatski
Keywords: Steam turbines, Gas Turbines
Other: Tehnička enciklopedija, izdanje 1994. godine
