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Papers by Ines Karagianni Ladasic
Proceedings of the 64th International Scientific Conference on Economic and Social Development, 2021
International Journal of Heat and Mass Transfer, 2018
External reactor vessel cooling (ERVC) is the key technology for In-Vessel Retention (IVR) to ens... more External reactor vessel cooling (ERVC) is the key technology for In-Vessel Retention (IVR) to ensure the safety of a nuclear power plant (NPP) under severe accident conditions. The thermal margin of nucleate boiling heat transfer on the reactor pressure vessel (RPV) lower head is important for ERVC and of wide concern to researchers. In such boiling heat transfer processes, the reactor vessel wall inclination effect on the heat transfer coefficient (HTC) and critical heat flux (CHF) should be considered. In this study, experiments were performed to investigate the effects of surface orientation and heater material on the HTC and CHF of nucleate boiling. Copper (Cu), stainless steel (SS) as well as prototype material (SA508) of the reactor pressure vessel in the nuclear power plant were used to perform boiling tests under atmosphere pressure, respectively. The orientation angle of all boiling surfaces were varied between 0°(upward) and 180°(downward). The experimental results show that the HTC is enhanced for the downward heater surfaces (u > 90) under the low heat flux conditions and the enhancement ratio decreases with the increase of the heat flux. In addition, the relationship of measured CHF value with the orientation angle was obtained and it shows that the CHF value changes little as the inclination angle increases from 0°to 120°, but it decreases rapidly as the orientation angle increases towards 180°f or all boiling surfaces. The material effect, which indicated by thermal effusivity ffiffiffiffiffiffiffiffiffiffi qc p k p , on CHF is also investigated that the surface with larger thermal effusivity has the higher CHF value. In addition, the SA508 surface has the highest CHF value comparing with those of Cu surface and SS surface due to surface corrosion in the boiling process. Based on the experimental data, a correlation for CHF prediction is developed which includes the effects of surface orientation, thermal effusivity and corrosion.
The global business environment is facing many significant challenges, and this was the guideline... more The global business environment is facing many significant challenges, and this was the guideline for our 8th International Scientific Conference "Future World by 2050", held in Pula, Croatia from 1st to 3rd June, 2017. The aim was to bring together researchers, scientists, and students to exchange and share their experiences, views, new ideas, and research results on all aspects of Economics, and to discuss the prac-tical challenges encountered and the solutions proposed. The focus of this eighth conference was to explore how economics, as a sci-ence, will face global challenges in the future; challenges such as poverty, aging popu-lation, (un)employment, (dis)integration, environmental catastrophes, innovations, etc. Through six sessions: Socioeconomic Challenges of the Future World; Economics; Finance and Accounting; Marketing and Management; Tourism; and Innovation and Competitive-ness, theparticipants discussed the presented research findings, and we are sure that the...
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings
Cilj je rada, polazeci od brojnih dugorocnih prednosti koje proizlaze iz titule Europske prijesto... more Cilj je rada, polazeci od brojnih dugorocnih prednosti koje proizlaze iz titule Europske prijestolnice kulture (ECOC European Capital of Culture) primjenom koncepcije održivog razvoja te drustveno odgovornog poslovanja u gospodarskoj praksi, utvrditi razinu implementacije sudjelovanja poduzetnistva u kulturi i procijeniti koristi koje bi Pula mogla imati kao moguca nositeljica tog naslova 2020. godine. Prilikom izrade diplomskog rada, koristene su studija relevantne literature, metode analize, sinteze, klasifikacije, deskripcije i generalizacije, dok je u empirijskom dijelu koristen intervju s akterima kulturnog života grada Pule te sekundarna analiza statistickih podataka. Rezultati istraživanja pulskih poduzetnika u kulturi dobiveni su primarnim istraživanjem, provedenim putem intervjua cija su pitanja bila istovjetna za sve sudionike, a odnosila su se na slijedece; smatraju li se kao kulturni umjetnici poduzetnicima u kulturi, kakvu ulogu igra rizik u njihovom poslovnom životu, zbog cega su odabrali profesiju, sto im je na prvom mjestu profit ili zadovoljstvo korisnika, kako se globalna financijska kriza odrazila na njihovo poslovanje, kako se boriti protiv recesije, kakve projekte spremaju, jesu li građani uslijed krize smanjili izdatke za kulturne potrebe, sudjeluju li kao poduzetnici u kulturi u promoviranju RH u svijetu, postoji li među-institucijska suradnja, postoje li sponzori njihovog rada, jesu li upoznati s projektom „Poduzetnistvo u kulturi“, kako stoje s primjenom novih tehnologija, medijima, marketingom, smatraju li da je kultura u Hrvatskoj zapostavljena i je li preskupa. Intervju je proveden sa 11 sugovornika predstavnika pulske kulturne scene. Europska prijestolnica kulture je jedan od najdugovjecnijih projekata Europske Unije. Danas se popularno naziva kulturnom olimpijadom koja je razinu života u dosadasnjim gradovima domacinima podigla na visi stupanj, ne samo s obzora kulture, vec i prometne, komunalne i arhitektonske infrastrukture, sto omogucava razvoj turistickog proizvoda i ostalih gospodarskih grana, ali i ono sto Pulu najvise zanima, a to je oživljavanje grada, vrednovanje bastine, razvoj kulturnog turizma te postizanje konkurentnosti znanja. Kljucne rijeci: Europska prijestolnica kulture, poduzetnistvo u kulturi
Proceedings of the 64th International Scientific Conference on Economic and Social Development, 2021
International Journal of Heat and Mass Transfer, 2018
External reactor vessel cooling (ERVC) is the key technology for In-Vessel Retention (IVR) to ens... more External reactor vessel cooling (ERVC) is the key technology for In-Vessel Retention (IVR) to ensure the safety of a nuclear power plant (NPP) under severe accident conditions. The thermal margin of nucleate boiling heat transfer on the reactor pressure vessel (RPV) lower head is important for ERVC and of wide concern to researchers. In such boiling heat transfer processes, the reactor vessel wall inclination effect on the heat transfer coefficient (HTC) and critical heat flux (CHF) should be considered. In this study, experiments were performed to investigate the effects of surface orientation and heater material on the HTC and CHF of nucleate boiling. Copper (Cu), stainless steel (SS) as well as prototype material (SA508) of the reactor pressure vessel in the nuclear power plant were used to perform boiling tests under atmosphere pressure, respectively. The orientation angle of all boiling surfaces were varied between 0°(upward) and 180°(downward). The experimental results show that the HTC is enhanced for the downward heater surfaces (u > 90) under the low heat flux conditions and the enhancement ratio decreases with the increase of the heat flux. In addition, the relationship of measured CHF value with the orientation angle was obtained and it shows that the CHF value changes little as the inclination angle increases from 0°to 120°, but it decreases rapidly as the orientation angle increases towards 180°f or all boiling surfaces. The material effect, which indicated by thermal effusivity ffiffiffiffiffiffiffiffiffiffi qc p k p , on CHF is also investigated that the surface with larger thermal effusivity has the higher CHF value. In addition, the SA508 surface has the highest CHF value comparing with those of Cu surface and SS surface due to surface corrosion in the boiling process. Based on the experimental data, a correlation for CHF prediction is developed which includes the effects of surface orientation, thermal effusivity and corrosion.
The global business environment is facing many significant challenges, and this was the guideline... more The global business environment is facing many significant challenges, and this was the guideline for our 8th International Scientific Conference "Future World by 2050", held in Pula, Croatia from 1st to 3rd June, 2017. The aim was to bring together researchers, scientists, and students to exchange and share their experiences, views, new ideas, and research results on all aspects of Economics, and to discuss the prac-tical challenges encountered and the solutions proposed. The focus of this eighth conference was to explore how economics, as a sci-ence, will face global challenges in the future; challenges such as poverty, aging popu-lation, (un)employment, (dis)integration, environmental catastrophes, innovations, etc. Through six sessions: Socioeconomic Challenges of the Future World; Economics; Finance and Accounting; Marketing and Management; Tourism; and Innovation and Competitive-ness, theparticipants discussed the presented research findings, and we are sure that the...
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings
Cilj je rada, polazeci od brojnih dugorocnih prednosti koje proizlaze iz titule Europske prijesto... more Cilj je rada, polazeci od brojnih dugorocnih prednosti koje proizlaze iz titule Europske prijestolnice kulture (ECOC European Capital of Culture) primjenom koncepcije održivog razvoja te drustveno odgovornog poslovanja u gospodarskoj praksi, utvrditi razinu implementacije sudjelovanja poduzetnistva u kulturi i procijeniti koristi koje bi Pula mogla imati kao moguca nositeljica tog naslova 2020. godine. Prilikom izrade diplomskog rada, koristene su studija relevantne literature, metode analize, sinteze, klasifikacije, deskripcije i generalizacije, dok je u empirijskom dijelu koristen intervju s akterima kulturnog života grada Pule te sekundarna analiza statistickih podataka. Rezultati istraživanja pulskih poduzetnika u kulturi dobiveni su primarnim istraživanjem, provedenim putem intervjua cija su pitanja bila istovjetna za sve sudionike, a odnosila su se na slijedece; smatraju li se kao kulturni umjetnici poduzetnicima u kulturi, kakvu ulogu igra rizik u njihovom poslovnom životu, zbog cega su odabrali profesiju, sto im je na prvom mjestu profit ili zadovoljstvo korisnika, kako se globalna financijska kriza odrazila na njihovo poslovanje, kako se boriti protiv recesije, kakve projekte spremaju, jesu li građani uslijed krize smanjili izdatke za kulturne potrebe, sudjeluju li kao poduzetnici u kulturi u promoviranju RH u svijetu, postoji li među-institucijska suradnja, postoje li sponzori njihovog rada, jesu li upoznati s projektom „Poduzetnistvo u kulturi“, kako stoje s primjenom novih tehnologija, medijima, marketingom, smatraju li da je kultura u Hrvatskoj zapostavljena i je li preskupa. Intervju je proveden sa 11 sugovornika predstavnika pulske kulturne scene. Europska prijestolnica kulture je jedan od najdugovjecnijih projekata Europske Unije. Danas se popularno naziva kulturnom olimpijadom koja je razinu života u dosadasnjim gradovima domacinima podigla na visi stupanj, ne samo s obzora kulture, vec i prometne, komunalne i arhitektonske infrastrukture, sto omogucava razvoj turistickog proizvoda i ostalih gospodarskih grana, ali i ono sto Pulu najvise zanima, a to je oživljavanje grada, vrednovanje bastine, razvoj kulturnog turizma te postizanje konkurentnosti znanja. Kljucne rijeci: Europska prijestolnica kulture, poduzetnistvo u kulturi