- Type of paper
: Paper in journal
Title: The effect of matrix heat conduction on the temperature
fields in the rotary heat exchanger
- Authors:
- Franković, Bernard (12422)
- Trp, Anica (204822)
Journal: Zbornik tehničkog fakulteta Rijeka
Number: 12
ISSN: 0353-281
Volume: 12
Year: 1992
Pages: from 21 to 32
Number of references: 15
Language: hrvatski
Summary: An mathematical analysis of the heat transfer in dry rotary
heatexchanger - regenerator is reported. The case in whichthreedimensional
material heat conduction effect on thetemperature fields in the rotary heat
exchanger is taken intoconsideration. Governing differential equations are
solvednumerically using finite difference technique. An iterativeprocedure
is applied for solving a set of linear algebraicequations. Calculated
temperatures from relevant literature fortwodimensional case are in good
agreement with results obtainedfor adequate threedimensional model. Also,
calculated regeneratorefficiencies for both models are in good agreement.
Keywords: Heat conduction, Threedimensional model, Temperature fields, Rotary heat exchanger.
- Type of paper
: Paper in journal
Title: Optimization of the oil cooling for lubrication of the two
cylinder air cooled engine
- Authors:
- Škifić, Nedeljko (47190)
- Franković, Bernard (12422)
Journal: Zbornik tehničkog fakulteta Rijeka
Number: 1
ISSN: 0353-281
Volume: 12
Year: 1992
Pages: from 139 to 146
Number of references: 4
Language: hrvatski
Summary: In this paper, the survey of examination and examination
analysisof oil cooling on two cilinder, four-stroke, Diesel air
coolingengine using direct fuel injection is given. The engine pistonbore
is 0.1 m (100 mm), stroke 0.09 m (90 mm) and compressionratio 17.5. Output
is 21 kW at the angle speed 314.16 rad/s.Along with survey of oil
temperature in function of chosencooler, the cylinder temperature
disposition is given, so thetemperature distribution of the cylinder load
can be presumed.
Keywords: Diesel engine, Oil cooler, Oil temperature.
- Type of paper
: Paper in journal
Title: Heat Transfer Analysis in Wet Heat Regenerator with
Nonhygroscopic Storage Matrix
- Authors:
- Franković, Bernard (12422)
Journal: Strojarstvo
Number: 3
ISSN: 0562-1887
Volume: 34
Year: 1992
Pages: from 121 to 131
Number of references: 21
Language: hrvatski
Summary: The paper discusses the compaund phenomenon of the heat and
masstransfer analysis in wet regenerator. The mathematical modelcomposed of
a system of partial differential equations is solvedby using the numerical
method of finite differences. Theperiodical distribution of the gas and
matrix temperature withthe coresponding rate of the wet component along the
regeneratoris obtained. The longitudinal heat conduction in the
matrixmaterial is also taken into consideration. For some routinetehnical
problems in the aplication of a wet regenerativeexchanger, the given
complex analysis of heat exchange and masstransfer can be simplified
because the mass transfer has aminimal effect on heat exchange.
Keywords: Heat transfer, Mass transfer, Wet heat regenerator, Rotary regenerator.
- Type of paper
: Paper in journal
Title: Heat transfer analysis in dry rotary heat exchanger
- Authors:
- Franković, Bernard (12422)
Journal: Strojarstvo
Number: 3
ISSN: 0562-1887
Volume: 35
Year: 1993
Pages: from 111 to 120
Number of references: 24
Language: hrvatski
Summary: A mathematical analysis of the heat transfer physical
phenomenonin the dry rotary heat exchanger is reported. Matrix material
ofthe rotary heat exchanger is aproximated as a porous structurefor the hot
and cold gas stream flow. The mathematical model isdescribed by the system
of mass and energy conservationequations, and in analysis the heat
conduction in tangential,radial and axial direction is taken into the
consideration.Governing differential equations of the threedimensional
modelare solved numerically using finite difference technique. Forsolving a
set of linear algebraic equations an iterativeprocedure is applied.
Calculated temperatures forthreedimensional model are in good accordance
with resultsobtained in relevant works for twodimensional model.
Also,calculated regenerator efficiencies for both models are in
goodagreement. On the basis of these solutions the effect of thematrix heat
conduction on the temperature fields of gases andmatrix is studied.
Keywords: Dry rotary heat exchanger, Threedimensional model, Temperature fields.
- Type of paper
: Paper in journal
Title: Development of engine lubricants
- Authors:
- Oršić, Marinko (100940)
- Arsić, S.
Journal: Goriva i maziva
Number: 1
ISSN: 0350-350
Volume: 30
Year: 1991
Pages: from 5 to 10
Number of references: 11
Language: hrvatski
Summary: Engine manufacturers worldwide are working in several
directionsto provide consumers with vehicles that offer greater
fuelefficiency, increased durability and reduced maintenance andengine
emission. The results of these, sometimes conflictedattributes can affect
lubricant formulation requirements andundergoe great changes of
specifications. The article alsodescribes this changes and situation in
Yugoslavia.
Keywords: Automotive lubricants, Quality level, Environmental requirements, Viscosity grade
- Type of paper
: Paper in proceedings
Title: The heat analysis of the low temperature corrosion at the
rotary heat exchanger
- Authors:
- Franković, Bernard (12422)
- Editors
- Srb, Neven
- Feretić, Danilo
Proceedings title: 4. međunarodni simpozij o novim tehnologijama
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: ISBN 86-81997
Pages: from 18 to 22
Meeting: 4. međunarodni simpozij o novim tehnologijama
Held: from 10/25/93 to 10/27/93
Summary: The low temperature corrosion problem in rotary heat
exchangerisn't completely solved. Theoretical research on this problem
hasbeen done using numerical simulation of the temperaturedistribution over
the rotary heat exchanger matrix. In spite ofthe high mean gas exit
temperature, quit often the results showthat the local matrix temperatures
are below the criticaltemperature. This could be hazardous for the matrix
material. Thesoftware has been tested on two real cases of the rotary
airpreheaters of the electric power stations.
Keywords: Low temperature corrosion, Rotary heat exchanger, Numerical simulation.
- Type of paper
: Paper in proceedings
Title: Numerical simulation of the low temperature corrosion at
the rotary heat exchanger
- Authors:
- Franković, Bernard (12422)
- Trp, Anica (204822)
- Editors
- Franković, Bernard (12422)
Proceedings title: Zbornik radova međunarodnog kongresa Energija i zaštita čovjekove okoline
Language: hrvatski
Place: Opatija
Year: 1992
ISBN/ISSN: ISBN 86-81601
Pages: from 259 to 273
Meeting: Međunarodni kongres Energija i zaštita čovjekove okoline
Held: from 10/28/92 to 10/30/92
Summary: The low temperature corrosion problem in rotary heat
exchangerisn't completely solved. Theoretical research on this problem
hasbeen done using numerical simulation of the temperaturedistribution over
the rotary heat exchanger matrix. Inspite ofthe high mean gas exit
temperature, quite often the results showthat the local matrix temperatures
are below the criticaltemperature. This could be hasardeous for the matrix
material.The software has been tested on two real cases of the rotary
airpreheaters of the electric power stations.
Keywords: Low temperature corrosion, Rotary heat exchanger, Numerical simulation
- Type of paper
: Paper in proceedings
Title: Resorption heat pumps in heating systems
- Authors:
- Obsieger, Vilka (33945)
- Editors
- Srb, Neven
Proceedings title: 4. međunarodni simpozij o novim tehnologijama
Language: hrvatski
Place: Pula
Year: 1993
ISBN/ISSN: 86-81997
Pages: from 14 to 17
Meeting: 4. međunarodni simpozij o novim tehnologijama
Held: from 10/25/93 to 10/27/93
Summary: In this work the results of the thermodynamic cycle
analysis ofsingle stage resorption heat pump are presented. The
coefficientsof performance and mass circulation ratio for
differenttemperatures have been calculated and illustrated in diagrams.The
effects of heat exchangers and operating temperatures on thecoefficient of
performance of an resorption heat pump ere shown.
Keywords: Resorption heat pump, Heat exchanger, Working fluid.
- Type of paper
: Paper in proceedings
Title: Influence of the working fluid on the energy efficiencies
of the absorption heat transformer
- Authors:
- Obsieger, Vilka (33945)
- Editors
- Srb, Neven
Proceedings title: 3. međunarodni simpozij o novim tehnologijama
Language: hrvatski
Place: Opatija
Year: 1991
ISBN/ISSN: 86-81997-04-1
Pages: from 202 to 206
Meeting: 3. međunarodni simpozij o novim tehnologijama
Held: from 10/15/91 to 10/17/91
Summary: Absorption heat transformers represent an interesting
solutionfor upgrading low temperature waste heat to higher
temperatureuseful heat with minimum consumption of mechanical energy.
Inthis work the absorption heat transformer cycles using variousbinary
mixtures as working fluids have been analysed. Thecoefficient of
performance and energy efficiencies have beenanalysed as a function of
temperatures.
Keywords: Absorption heat transformer, Working fluid, Energy efficiencies.
- Type of paper
: Paper in proceedings
Title: Working fluids for absorption heat pumps
- Authors:
- Obsieger, Vilka (33945)
- Editors
- Franković, Bernard (12422)
Proceedings title: Energija i zaštita čovjekove okoline
Language: hrvatski
Place: Opatija
Year: 1992
ISBN/ISSN: 86-81601-01-8
Pages: from 283 to 292
Meeting: Međunarodni kongres Energija i zaštita čovjekove okoline
Held: from 10/28/92 to 10/30/92
Summary: In this work the absorption heat pump cycles with and
withoutheat exchanger have been analysed. The coefficients ofperformance
and mass circulation ratio for different workingmixtures and temperatures
have been calculated and illustrated indiagrams. The effects of operating
temperatures as well as heatexchanger on the coefficient of performance of
an absorption heatpump are shown.
Keywords: Working fluid, Absorption machine, Absorption heat pump, Heat exchanger.
- Type of paper
: Paper in proceedings
Title: Single-stage and multi-stage absorption heat transformers
- Authors:
- Obsieger, Vilka (33945)
- Editors
- Jelavić, Branka
Proceedings title: Nove tehnologije i gospodarenje energijom
Language: hrvatski
Place: Zagreb
Year: 1993
ISBN/ISSN: 953-96083-2-5
Pages: from 321 to 330
Meeting: 2. forum Dan energije u Hrvatskoj
Held: from 12/16/93 to 12/16/93
Summary: In this work the thermodynamic analysis of absorption
heattransformer cycles is made. The coefficient of performance,energy
efficiencies and mass circulation ratio for two workingmixtures have been
analysed. Single-stage and two-stageabsorption heat transformers are
presented and discussed.
Keywords: Absorption heat transformer, Absorption cycles, Energy efficiencies.
- Type of paper
: Paper in proceedings
Title: Desalination as alternative for water getting from the sea
in the coastal region and the islands of Croatian part of Adriatic
- Authors:
- Franković, Bernard (12422)
- Editors
- Feretić, Danilo
Proceedings title: Hrvatsko pomorsko gospodarstvo - danas i sutra
Language: hrvatski
Place: Opatija
Year: 1993
Pages: from 51 to 61
Meeting: Znanstveno savjetovanje o temi Hrvatsko pomorsko gospodarstvo - danas i sutra
Held: from 11/17/93 to 11/19/93
- Type of paper
: Computer program
Title: The temperature fields and thermal efficiency determining
for twodimensional model of dry rotary heat exchanger
- Authors:
- Franković, Bernard (12422)
- Trp, Anica (204822)
- Šokman, Jadranka (164493)
Odering party: TEH PROJEKT
Institution depot: Tehnički fakultet Rijeka
HW platform: PC AT 386
Operating system: DOS
Programming language: Fortran 77
Year: 1992
- Type of paper
: Computer program
Title: The temperature fields and thermal efficiency determining
for twodimensional model of wet rotary heat exchanger
- Authors:
- Franković, Bernard (12422)
- Trp, Anica (204822)
- Šokman, Jadranka (164493)
Odering party: TEH PROJEKT
Institution depot: Tehnički fakultet Rijeka
HW platform: PC AT 386
Operating system: DOS
Programming language: Fortran 77
Year: 1992
- Type of paper
: Computer program
Title: The temperature fields and thermal efficiency determining
for threedimensional model of dry rotary heat exchanger
- Authors:
- Franković, Bernard (12422)
- Trp, Anica (204822)
Odering party: TEH PROJEKT
Institution depot: Tehnički fakultet Rijeka
HW platform: PC AT 386
Operating system: DOS
Programming language: Fortran 77
Year: 1992
