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Goran Krajačić
University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Ivana Lučića 5, 10 002, Zagreb, Croatia

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Journal article
Published: 24 August 2021 in Smart Energy
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District heating and cooling systems represent a valuable infrastructure that can facilitate the integration of various energy sources into urban energy systems. One of those sources is municipal waste. By applying the waste-to-energy concept, landfilled waste amounts can be significantly reduced, and heat, cold and electricity can be produced via combined heat and power plants. This research investigates the possibility of integration of combined heat and power waste incineration plant into the existing gas-based district heating system in the central European city. To secure 365 days of heat demand, the influence of the introduction of a warm district cooling system is simulated, where heat is distributed via the existing heat distribution network to distributed chillers, building sites locations. The results show 33% higher energy-from-waste potential in summer compared to winter, which is an opposite trend to heating demand and compatible with yearly distribution of energy needs for covering cooling demand. Despite the identified compatibility on a seasonal scale, to cover up to 100% of district cooling energy consumption with energy-from-waste, heat storage is needed, due to differences in short-term heat production and demand. This synergy has positive effects on the energy production efficiency and operation of the waste to energy plant and district heating system which results in the highest reduction in fuel consumption as well as in decrease in greenhouse gas emissions. Results of this research can be used for a better understanding of interactions between analysed technologies/systems in the wide range of cities with a continental climate.

ACS Style

Nikola Matak; Tihomir Tomić; Daniel Rolph Schneider; Goran Krajačić. Integration of WtE and district cooling in existing Gas-CHP based district heating system – Central European city perspective. Smart Energy 2021, 4, 100043 .

AMA Style

Nikola Matak, Tihomir Tomić, Daniel Rolph Schneider, Goran Krajačić. Integration of WtE and district cooling in existing Gas-CHP based district heating system – Central European city perspective. Smart Energy. 2021; 4 ():100043.

Chicago/Turabian Style

Nikola Matak; Tihomir Tomić; Daniel Rolph Schneider; Goran Krajačić. 2021. "Integration of WtE and district cooling in existing Gas-CHP based district heating system – Central European city perspective." Smart Energy 4, no. : 100043.

Journal article
Published: 05 March 2021 in Energy
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Forecasting energy demand for the industrial sector is both interesting and difficult due to the difference in energy demand specific to each industrial sub-sector. For an accurate prediction of the future, Industry Energy Demand model was developed based on multiple linear regression method, using five macroeconomic independent variables. This model was tested by considering Morocco as a study case. Energy demand forecast is based on a bottom-up approach. It is built by piecing together consumed quantity of goods of each sub-sector to give rise to total energy demand. This model produces results comparable to those of the International Energy Agency. Regarding demand forecast, it was found that 8.27 MToe will be needed in 2050 to meet energy demand. It was also found that the adoption of energy efficiency measures allow an energy saving of 1 MToe in 2050. This model was also used to test the impact of variation in import and export on final energy demand. Regarding the potential of the production of biogas from Municipal Solid Waste, it was found that only 36.4% of total Liquefied Petroleum Gas demand could be replaced by biogas.

ACS Style

Mohamed Maaouane; Smail Zouggar; Goran Krajačić; Hassan Zahboune. Modelling industry energy demand using multiple linear regression analysis based on consumed quantity of goods. Energy 2021, 225, 120270 .

AMA Style

Mohamed Maaouane, Smail Zouggar, Goran Krajačić, Hassan Zahboune. Modelling industry energy demand using multiple linear regression analysis based on consumed quantity of goods. Energy. 2021; 225 ():120270.

Chicago/Turabian Style

Mohamed Maaouane; Smail Zouggar; Goran Krajačić; Hassan Zahboune. 2021. "Modelling industry energy demand using multiple linear regression analysis based on consumed quantity of goods." Energy 225, no. : 120270.

Conference paper
Published: 20 September 2020 in Springer Proceedings in Energy
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Power generation sector worldwide accounts for high water withdrawal and consumption due to the hydropower generation and cooling of thermal power plants. Hence, the operation of the power generation sector is constrained by the availability of the water resources, as well as the addition of constrains on water resources used for other purposes, such as irrigation, flood control, water supply, agriculture, etc. The optimal utilization of water resources between the water and energy sector is defined under the term water-energy (or water-power) nexus. This study describes the implementation of hydrological LISFLOOD, Medium-Term Hydrothermal Coordination (MTHC) and Unit Commitment and Dispatch (Dispa-SET UCD) models for detailed analysis of impacts on the SEE regional power system for three different hydrological years. Results were validated based on the available ENTSO-E data for the average hydrological (2015) year. Results show increase in hydropower generation from 53.06 TWh for dry year, to 65.24 and 85.13 TWh for average and wet year, respectively, while the average electricity cost falls from 17.79 EUR/MWh for dry year, to 16.36 and 14.05 EUR/MWh for average and wet year, respectively. This analysis successfully replicates the methodology under the WATERFLEX project, with the novelty in run-of-river hydropower generation calculations in MTHC model.

ACS Style

Goran Stunjek; Antun Pfeifer; Goran Krajačić; Neven Duić. Analysis of the Water—Power Nexus of the Balkan Peninsula Power System. Springer Proceedings in Energy 2020, 235 -257.

AMA Style

Goran Stunjek, Antun Pfeifer, Goran Krajačić, Neven Duić. Analysis of the Water—Power Nexus of the Balkan Peninsula Power System. Springer Proceedings in Energy. 2020; ():235-257.

Chicago/Turabian Style

Goran Stunjek; Antun Pfeifer; Goran Krajačić; Neven Duić. 2020. "Analysis of the Water—Power Nexus of the Balkan Peninsula Power System." Springer Proceedings in Energy , no. : 235-257.

Review
Published: 11 August 2020 in Renewable and Sustainable Energy Reviews
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European Union has definitely identified the priorities towards sustainable and low-carbon energy systems recognizing a key role to islands that have been described as ideal sites to develop and test innovative strategies and solutions that will then boost the transition on the mainland. Nevertheless, the integration of Variable Renewable Energy Sources (vRES) into the electricity grid are already causing technical problems to island grids thus making grid flexibility a key topic. In the past, since power plants were completely manageable while the load was unpredictable, the grid flexibility was supplied by traditional power plants; but now, due to vRES, the variability and unpredictability has moved to the generation side and the opposite shift has happened to flexibility agents. This paper deals with solutions that improve the ability of the grid to cope with vRES unpredictability such as energy storage technologies and all the solutions offered by sector coupling strategies. Particularly, this research focus on solutions that deals with such solutions in the insular contexts. Several solutions have been presented concluding that battery energy systems and pumped hydro energy storage are the most used technologies in islands. As regard sector coupling and Demand Side Management solutions, all the analysed solutions showed relevant results in terms of i) reduction of excess electricity production and ii) increased grid ability of hosting vRES. Nevertheless, some of the current gaps in literature have been pinpointed and future research challenge and opportunities have been suggested.

ACS Style

Daniele Groppi; Antun Pfeifer; Davide Astiaso Garcia; Goran Krajačić; Neven Duić. A review on energy storage and demand side management solutions in smart energy islands. Renewable and Sustainable Energy Reviews 2020, 135, 110183 .

AMA Style

Daniele Groppi, Antun Pfeifer, Davide Astiaso Garcia, Goran Krajačić, Neven Duić. A review on energy storage and demand side management solutions in smart energy islands. Renewable and Sustainable Energy Reviews. 2020; 135 ():110183.

Chicago/Turabian Style

Daniele Groppi; Antun Pfeifer; Davide Astiaso Garcia; Goran Krajačić; Neven Duić. 2020. "A review on energy storage and demand side management solutions in smart energy islands." Renewable and Sustainable Energy Reviews 135, no. : 110183.

Journal article
Published: 22 March 2020 in Energies
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Croatia aims to achieve 10% of its energy production from the renewable energy sources in the total energy consumption in the transport sector. One of the ways to achieve this goal is by the use of electric vehicles. This work comparatively analyses the financial and social aspects of vehicle-to-grid charging in standard and fast charging mode, their impact on the renewable electricity production and the total electricity consumption regulated through variable electricity prices. Data were taken for the wider urban area of the Dubrovnik region. The assumption is that the Dubrovnik region will be self-sufficient by the year 2050 with 100% renewable electricity production and that all conventional vehicles will be replaced by electric vehicles. This work aims to show that the fast charging based on 10 min time steps offers more opportunities for flexibility and utilization of renewable generation in the energy system than the standard charging based on hourly time step. The results of this work showed the opposite, where in most of the scenarios standard charging provided better results. Replacement of the existing two tariff model in electricity prices with variable electricity prices contributes to the stability of the energy system, providing better regulation of charging and higher opportunities for renewable electricity utilization in standard and fast charging and reduction of charging costs. According to the financial aspects, fast charging is shown to be more expensive, but for the social aspects, it provides electric vehicles with more opportunities for better competition in the market.

ACS Style

Anamarija Falkoni; Antun Pfeifer; Goran Krajačić. Vehicle-to-Grid in Standard and Fast Electric Vehicle Charging: Comparison of Renewable Energy Source Utilization and Charging Costs. Energies 2020, 13, 1510 .

AMA Style

Anamarija Falkoni, Antun Pfeifer, Goran Krajačić. Vehicle-to-Grid in Standard and Fast Electric Vehicle Charging: Comparison of Renewable Energy Source Utilization and Charging Costs. Energies. 2020; 13 (6):1510.

Chicago/Turabian Style

Anamarija Falkoni; Antun Pfeifer; Goran Krajačić. 2020. "Vehicle-to-Grid in Standard and Fast Electric Vehicle Charging: Comparison of Renewable Energy Source Utilization and Charging Costs." Energies 13, no. 6: 1510.

Journal article
Published: 24 February 2020 in Energy
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In order to integrate large shares of variable renewable energy sources, district heating can play an important role. Furthermore, in order to increase the efficiency of district heating systems, interconnecting adjacent system could be socio-economically justified. In order to assess the economic and environmental consequences of the latter, a mixed linear integer optimization model was developed with the endogenous decision on the potential interconnectors. The case study was carried out for the city of Zagreb, Croatia. The results showed that all three studied interconnections are economically viable, while the socio-economic cost was 29.2% lower in the case of the implemented interconnectors, all other capacities being equal. Moreover, the optimal thermal energy storage capacity was found to be equal to 25 and 24 days of average heating demand in two alternative scenarios. Finally, compared to the reference case, the CO2 emissions could be lowered by 15.3%.CO2 savings derive mainly from better utilization of low carbon capacities after interconnecting the systems, as well as from installation of heat pumps and electric boilers.

ACS Style

Dominik Franjo Dominković; Goran Stunjek; Ignacio Blanco; Henrik Madsen; Goran Krajačić. Technical, economic and environmental optimization of district heating expansion in an urban agglomeration. Energy 2020, 197, 117243 .

AMA Style

Dominik Franjo Dominković, Goran Stunjek, Ignacio Blanco, Henrik Madsen, Goran Krajačić. Technical, economic and environmental optimization of district heating expansion in an urban agglomeration. Energy. 2020; 197 ():117243.

Chicago/Turabian Style

Dominik Franjo Dominković; Goran Stunjek; Ignacio Blanco; Henrik Madsen; Goran Krajačić. 2020. "Technical, economic and environmental optimization of district heating expansion in an urban agglomeration." Energy 197, no. : 117243.

Journal article
Published: 18 May 2019 in Renewable Energy
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The EU policy aims towards low carbon economy by establishing a goal of reduction of 93–99% in greenhouse gas emissions in energy sector by 2050. This means a complete energy transition from the fossil fuel based systems to mostly renewable and low-carbon based energy systems. In order to integrate variable renewable energy sources, day-ahead and intraday electricity markets influence, demand – response technologies implementation and fossil fuel powered thermal power plants’ flexibility considerations need to be analysed. Along with the integration of solar photovoltaics, demand – response technologies (power-to-heat and vehicle-to-grid concepts) needed to balance the system, were deployed. In calculations performed on the case study of Croatia in years 2014 and 2030, a moderate introduction of heat storages in Croatian combined heat and power plants, introduction of electric vehicles and flexible operation of power plants enabled the integration of up to 2000 MW installed capacities of solar photovoltaic plants. The main integration criteria, a cumulative critical excess electricity production from solar and wind power, was kept under 5%. Results of this approach are the reduction in full load hours of economically feasible operation for Croatian power plants up to 2000 and combined heat and power plants to up to 3000.

ACS Style

Antun Pfeifer; Goran Krajačić; Davor Ljubas; Neven Duić. Increasing the integration of solar photovoltaics in energy mix on the road to low emissions energy system – Economic and environmental implications. Renewable Energy 2019, 143, 1310 -1317.

AMA Style

Antun Pfeifer, Goran Krajačić, Davor Ljubas, Neven Duić. Increasing the integration of solar photovoltaics in energy mix on the road to low emissions energy system – Economic and environmental implications. Renewable Energy. 2019; 143 ():1310-1317.

Chicago/Turabian Style

Antun Pfeifer; Goran Krajačić; Davor Ljubas; Neven Duić. 2019. "Increasing the integration of solar photovoltaics in energy mix on the road to low emissions energy system – Economic and environmental implications." Renewable Energy 143, no. : 1310-1317.

Journal article
Published: 01 April 2019 in Renewable and Sustainable Energy Reviews
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Blue energy is one of the development sectors identified in the European Union strategic documents within the blue economy that promotes the exploitation of the sea potential. European energy initiatives recognize the importance of blue energy and encourage its research and development. The offshore exploitation of hydrocarbons worldwide is entering the final phase, followed by the gradual decommissioning of the production platforms and their removal. Decommissioning usually has an adverse effect on the environment aside from its economic intensity. By proper planning, lifetime of existing offshore infrastructure can be extended as it can be used for blue energy or other activities related to the blue economy. The paper deals with preliminary assessment of natural gas offshore infrastructure applicability for various blue energy options such as the wind power for electricity generation along with hydrogen, methane or ammonia production and other uses to reduce waste, energy consumption and CO2 emissions. Methods used included data gathering from 19 offshore gas facilities including assessment of natural gas production on current offshore fields, reserves and technology use, wind potential and decommissioning. Review of potential for energy production, storage and other activities such as CCS and CCU have also been given. Preliminary results show that there are possibilities for feasible and environmentally friendly blue energy utilisation. Average calculated capacity factors for the wind turbines are at the 32%. To investigate economic feasibility of decommission delay, detailed data gathering of wind potential should be done at specific heights along with load capacity of the gas platforms.

ACS Style

D. Karasalihović Sedlar; D. Vulin; G. Krajačić; L. Jukić. Offshore gas production infrastructure reutilisation for blue energy production. Renewable and Sustainable Energy Reviews 2019, 108, 159 -174.

AMA Style

D. Karasalihović Sedlar, D. Vulin, G. Krajačić, L. Jukić. Offshore gas production infrastructure reutilisation for blue energy production. Renewable and Sustainable Energy Reviews. 2019; 108 ():159-174.

Chicago/Turabian Style

D. Karasalihović Sedlar; D. Vulin; G. Krajačić; L. Jukić. 2019. "Offshore gas production infrastructure reutilisation for blue energy production." Renewable and Sustainable Energy Reviews 108, no. : 159-174.

Journal article
Published: 28 January 2019 in Energies
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The energy transition of future urban energy systems is still the subject of an ongoing debate. District energy supply can play an important role in reducing the total socio-economic costs of energy systems and primary energy supply. Although lots of research was done on integrated modelling including district heating, there is a lack of research on integrated energy modelling including district cooling. This paper addressed the latter gap using linear continuous optimization model of the whole energy system, using Singapore for a case study. Results showed that optimal district cooling share was 30% of the total cooling energy demand for both developed scenarios, one that took into account spatial constraints for photovoltaics installation and the other one that did not. In the scenario that took into account existing spatial constraints for installations, optimal capacities of methane and thermal energy storage types were much larger than capacities of grid battery storage, battery storage in vehicles and hydrogen storage. Grid battery storage correlated with photovoltaics capacity installed in the energy system. Furthermore, it was shown that successful representation of long-term storage solutions in urban energy models reduced the total socio-economic costs of the energy system for 4.1%.

ACS Style

Dominik Franjo Dominković; Goran Krajačić. District Cooling Versus Individual Cooling in Urban Energy Systems: The Impact of District Energy Share in Cities on the Optimal Storage Sizing. Energies 2019, 12, 407 .

AMA Style

Dominik Franjo Dominković, Goran Krajačić. District Cooling Versus Individual Cooling in Urban Energy Systems: The Impact of District Energy Share in Cities on the Optimal Storage Sizing. Energies. 2019; 12 (3):407.

Chicago/Turabian Style

Dominik Franjo Dominković; Goran Krajačić. 2019. "District Cooling Versus Individual Cooling in Urban Energy Systems: The Impact of District Energy Share in Cities on the Optimal Storage Sizing." Energies 12, no. 3: 407.

Journal article
Published: 20 November 2018 in Journal of Cleaner Production
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This study presents developed approaches that could be used for retrofitting of existing heat exchanger networks (HENs) within individual processes and industrial sites to achieve lower energy consumption, cost savings and emission reduction. Successful industrial applications are further presented, and future challenges are identified. Approaches used for retrofitting of existing HENs are based on heuristics, on thermodynamic analysis and insights – Pinch Analysis and recently developed Bridge Analysis, on numerical optimisation - Mathematical Programming, and on hybrid or combined approaches which are based on a combination of heuristics, physical insights and/or numerical optimisation. Optimisation-based approaches could be further divided into deterministic and stochastic (probabilistic) methods. Those systematic approaches (all approaches except pure heuristics) use either sequential (divided into sub-problems) or simultaneous synthesis methods.

ACS Style

Lidija Čuček; Stanislav Boldyryev; Jiří Jaromír Klemeš; Zdravko Kravanja; Goran Krajacic; Petar Varbanov; Neven Duić. Approaches for retrofitting heat exchanger networks within processes and Total Sites. Journal of Cleaner Production 2018, 211, 884 -894.

AMA Style

Lidija Čuček, Stanislav Boldyryev, Jiří Jaromír Klemeš, Zdravko Kravanja, Goran Krajacic, Petar Varbanov, Neven Duić. Approaches for retrofitting heat exchanger networks within processes and Total Sites. Journal of Cleaner Production. 2018; 211 ():884-894.

Chicago/Turabian Style

Lidija Čuček; Stanislav Boldyryev; Jiří Jaromír Klemeš; Zdravko Kravanja; Goran Krajacic; Petar Varbanov; Neven Duić. 2018. "Approaches for retrofitting heat exchanger networks within processes and Total Sites." Journal of Cleaner Production 211, no. : 884-894.

Review article
Published: 12 October 2018 in Renewable and Sustainable Energy Reviews
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Islands’ energy systems present a challenge in energy planning due to a limited amount of resources which could be used to make islands self-sufficient and sustainable. This paper presents a novel approach for defining energy system of a carbon neutral island which utilizes only intermittent renewable energy sources in combination with vehicle-to-grid concept as a demand response technology, where marine transportation has also been taken into account. Integration of power, heating, cooling and transport sectors has been modelled by using EnergyPLAN tool, i.e. its updated November 2017 version which is capable of simulating vehicle-to-grid operation in mentioned conditions. Power supply capacities have been selected not by using scenario analysis but by implementing an optimization procedure based on series of simulations in EnergyPLAN tool. In order to choose the most suitable power supply system configuration, two boundary conditions have been defined. Firstly, only solar and wind capacities must be utilized. Secondly, total electricity import and export must be balanced, i.e. the island has to be CO2 neutral. In order to validate the approach, Croatian Island of Korčula has been used as the case study. 2011 has been selected as the base year for which final energy consumption has been calculated. The final simulation year was set to 2030 in which optimal capacities are installed. It has been shown that configuration with 40 MW of wind and 6 MW of installed solar capacities presents the least cost solution, while 22 MW of wind in combination with 30 MW of installed solar capacities provides the lowest amount of total electricity import and export. Analysis of the vehicle-to-grid share reduction has shown increase in total import and export in both cases, while transmission peak loads have not been influenced.

ACS Style

Hrvoje Dorotić; Borna Doračić; Viktorija Dobravec; Tomislav Pukšec; Goran Krajacic; Neven Duić. Integration of transport and energy sectors in island communities with 100% intermittent renewable energy sources. Renewable and Sustainable Energy Reviews 2018, 99, 109 -124.

AMA Style

Hrvoje Dorotić, Borna Doračić, Viktorija Dobravec, Tomislav Pukšec, Goran Krajacic, Neven Duić. Integration of transport and energy sectors in island communities with 100% intermittent renewable energy sources. Renewable and Sustainable Energy Reviews. 2018; 99 ():109-124.

Chicago/Turabian Style

Hrvoje Dorotić; Borna Doračić; Viktorija Dobravec; Tomislav Pukšec; Goran Krajacic; Neven Duić. 2018. "Integration of transport and energy sectors in island communities with 100% intermittent renewable energy sources." Renewable and Sustainable Energy Reviews 99, no. : 109-124.

Editorial
Published: 13 September 2018 in Energy Conversion and Management
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The integration of sectors for more sustainable systems and processes provide a multi-disciplinary research domain to which researchers are contributing with intense motivation in the context of urgency for addressing global climate change. The 26 papers in the current special issue of the 12th Conference on Sustainable Development of Energy, Water and Environment Systems represent a pursuit of excellence for leading related advancements. This editorial contains a review of these advances with a focus on the themes of effective valorisation of bioenergy resources, energy-water nexus in wastewater treatment processes, optimized local energy supply for efficient and clean systems, solar energy technologies for the energy transition, and technologies for efficient combustion and electric transport. Other themes are alternative and cross-cutting technologies for the energy system in addition to analyses of thermal energy recovery and heat transfer. Significant contributions under these themes relate to biomass residues and biogas upgrading processes, novel renewable energy and performance comparisons in the wastewater sector, efficient micro-cogeneration, polygeneration and load-sharing approaches, clustering techniques in district heating networks as well as hybrid and concentrated solar power systems. Control strategies for latent energy storage, aging processes in battery packs, engine knock occurrence and coupled numerical engine modelling, fuel blends with nanoparticle additives, utilization of flue gas, soot formation in plastic waste pyrolysis, high altitude wind energy systems as well as exergy analyses for heat and cold recovery and reverse electrodialysis are other key contributions. The advances are expected to enable more sustainable energy conversion and management processes in a time when an integrated approach is nothing less than essential to maintain a coherent and liveable Planet.

ACS Style

Şiir Kılkış; Goran Krajačić; Neven Duić; Marc A. Rosen; Moh'd Ahmad Al-Nimr. Advancements in sustainable development of energy, water and environment systems. Energy Conversion and Management 2018, 176, 164 -183.

AMA Style

Şiir Kılkış, Goran Krajačić, Neven Duić, Marc A. Rosen, Moh'd Ahmad Al-Nimr. Advancements in sustainable development of energy, water and environment systems. Energy Conversion and Management. 2018; 176 ():164-183.

Chicago/Turabian Style

Şiir Kılkış; Goran Krajačić; Neven Duić; Marc A. Rosen; Moh'd Ahmad Al-Nimr. 2018. "Advancements in sustainable development of energy, water and environment systems." Energy Conversion and Management 176, no. : 164-183.

Journal article
Published: 23 July 2018 in Energy
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Sustainable island energy systems have been a subject of academic research for some time. Real-life examples of highly renewable and sustainable island energy systems can be found all over the World. Islands on small geographic proximity provide the potential for the development of 100% renewable island energy systems by exploiting their grid interconnections. This paper proposes that interconnections of a group of islands can be used to integrate the production from locally available renewable energy sources. Besides interconnection, electric vehicles were used as a demand response technology to provide storage for electrical energy from variable sources. Electric vehicles were connected to the grid using smart charging systems (vehicle-to-grid). In addition, stationary batteries were explored in sub-scenarios for the year 2035. This enabled to analyse the influence of the battery location through two main different scenarios, i.e. one big central battery and several smaller distributed batteries. Scenarios with different integration dynamic of variable renewable energy sources and electrical vehicles were modelled with EnergyPLAN model, while the interconnection analysis was carried out with the MultiNode tool expansion. The results showed that the interconnections increased the share of energy from renewable energy sources in the final energy consumption and declined the total critical excess electricity production, while vehicle to grid technology enabled exploitation of synergies between sectors.

ACS Style

Antun Pfeifer; Viktorija Dobravec; Luka Pavlinek; Goran Krajacic; Neven Duić. Integration of renewable energy and demand response technologies in interconnected energy systems. Energy 2018, 161, 447 -455.

AMA Style

Antun Pfeifer, Viktorija Dobravec, Luka Pavlinek, Goran Krajacic, Neven Duić. Integration of renewable energy and demand response technologies in interconnected energy systems. Energy. 2018; 161 ():447-455.

Chicago/Turabian Style

Antun Pfeifer; Viktorija Dobravec; Luka Pavlinek; Goran Krajacic; Neven Duić. 2018. "Integration of renewable energy and demand response technologies in interconnected energy systems." Energy 161, no. : 447-455.

Journal article
Published: 04 May 2018 in Energy
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A large majority of energy systems models of smart urban energy systems are modelling moderate climate with seasonal variations, such as the European ones. The climate in the tropical region is dominated by very high stable temperatures and high humidity and lacks the moderate climate's seasonality. Furthermore, the smart energy system models tend to focus on CO2 emissions only and lack integrated air pollution modelling of other air pollutants. In this study, an integrated urban energy system for a tropical climate was modelled, including modelling the interactions between power, cooling, gas, mobility and water desalination sectors. Five different large scale storages were modelled, too. The developed linear optimization model further included endogenous decisions about the share of district versus individual cooling, implementation of energy efficiency solutions and implementation of demand response measures in buildings and industry. Six scenarios for the year 2030 were developed in order to present a stepwise increase in energy system integration in a transition to a smart urban energy system in Singapore. The economically best performing scenario had 48% lower socio-economic costs, 68% lower CO2e emissions, 15% higher particulate matter emissions and 2% larger primary energy consumption compared to a business-as-usual case.

ACS Style

D.F. Dominković; V. Dobravec; Y. Jiang; P.S. Nielsen; G. Krajačić. Modelling smart energy systems in tropical regions. Energy 2018, 155, 592 -609.

AMA Style

D.F. Dominković, V. Dobravec, Y. Jiang, P.S. Nielsen, G. Krajačić. Modelling smart energy systems in tropical regions. Energy. 2018; 155 ():592-609.

Chicago/Turabian Style

D.F. Dominković; V. Dobravec; Y. Jiang; P.S. Nielsen; G. Krajačić. 2018. "Modelling smart energy systems in tropical regions." Energy 155, no. : 592-609.

Journal article
Published: 01 February 2018 in Renewable and Sustainable Energy Reviews
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ACS Style

Dominik Franjo Dominkovic; I. Bačeković; Allan Schrøder Pedersen; Goran Krajacic. The future of transportation in sustainable energy systems: Opportunities and barriers in a clean energy transition. Renewable and Sustainable Energy Reviews 2018, 82, 1823 -1838.

AMA Style

Dominik Franjo Dominkovic, I. Bačeković, Allan Schrøder Pedersen, Goran Krajacic. The future of transportation in sustainable energy systems: Opportunities and barriers in a clean energy transition. Renewable and Sustainable Energy Reviews. 2018; 82 ():1823-1838.

Chicago/Turabian Style

Dominik Franjo Dominkovic; I. Bačeković; Allan Schrøder Pedersen; Goran Krajacic. 2018. "The future of transportation in sustainable energy systems: Opportunities and barriers in a clean energy transition." Renewable and Sustainable Energy Reviews 82, no. : 1823-1838.

Journal article
Published: 28 December 2017 in Energy Conversion and Management
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The Conferences on Sustainable Development of Energy, Water and Environment Systems (SDEWES) at the beginning of the 21st century have become a significant venue for researchers to meet, and initiate, discuss, share, and disseminate new ideas in various disciplines of sustainable development. In 2002, the first conference was organised in Dubrovnik, Croatia and since then, 10 more successful conferences were realised. Following the success of international conferences in Dubrovnik, the organizing committees decided to organize the main conference and regional conferences all over the world in even years. In 2016, the second regional SDEWES conference, namely the 2nd South East European Conference on Sustainable Development of Energy, Water and Environment Systems, was held June 15–18 in Piran/Portorose, Slovenia while the 11th SDEWES conference was organised in Lisbon, Portugal on September 4–8. There were 10 special sessions dedicated to various sustainability topics organised in both conferences. This special issue is based primarily upon a collection of 35 papers selected from among 538 scientific contributions presented at the 2nd SEE and 11th SDEWES Conferences. Moreover, this editorial summarises SDEWES published articles that have addressed and identified problems or provided the background for the research that is reported in the current special issue. The main topics of the selected papers address sustainable combustion technologies, renewable energy sources and sector integration, including the integration of renewable technologies in the urban environment, the integration of heat, cold, electricity and fuel production in buildings and industrial applications, heat exchangers and heat exchanger networks, the development and integration of energy storage for concentrated solar power plants, and sectorial integration of bioenergy resources and biorefineries with a particular focus on system integration for efficient and low-carbon systems.

ACS Style

Goran Krajačić; Milan Vujanović; Neven Duić; Şiir Kılkış; Marc A. Rosen; Moh'd Ahmad Al-Nimr. Integrated approach for sustainable development of energy, water and environment systems. Energy Conversion and Management 2017, 159, 398 -412.

AMA Style

Goran Krajačić, Milan Vujanović, Neven Duić, Şiir Kılkış, Marc A. Rosen, Moh'd Ahmad Al-Nimr. Integrated approach for sustainable development of energy, water and environment systems. Energy Conversion and Management. 2017; 159 ():398-412.

Chicago/Turabian Style

Goran Krajačić; Milan Vujanović; Neven Duić; Şiir Kılkış; Marc A. Rosen; Moh'd Ahmad Al-Nimr. 2017. "Integrated approach for sustainable development of energy, water and environment systems." Energy Conversion and Management 159, no. : 398-412.

Journal article
Published: 01 December 2017 in Applied Energy
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ACS Style

Dominik Franjo Dominkovic; K.A. Bin Abdul Rashid; Alessandro Romagnoli; Allan Schrøder Pedersen; Kai Choong Leong; Goran Krajacic; N. Duić. Potential of district cooling in hot and humid climates. Applied Energy 2017, 208, 49 -61.

AMA Style

Dominik Franjo Dominkovic, K.A. Bin Abdul Rashid, Alessandro Romagnoli, Allan Schrøder Pedersen, Kai Choong Leong, Goran Krajacic, N. Duić. Potential of district cooling in hot and humid climates. Applied Energy. 2017; 208 ():49-61.

Chicago/Turabian Style

Dominik Franjo Dominkovic; K.A. Bin Abdul Rashid; Alessandro Romagnoli; Allan Schrøder Pedersen; Kai Choong Leong; Goran Krajacic; N. Duić. 2017. "Potential of district cooling in hot and humid climates." Applied Energy 208, no. : 49-61.

Journal article
Published: 01 October 2017 in Energy
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ACS Style

D.F. Dominković; I. Bačeković; D. Sveinbjörnsson; A.S. Pedersen; G. Krajačić. On the way towards smart energy supply in cities: The impact of interconnecting geographically distributed district heating grids on the energy system. Energy 2017, 137, 941 -960.

AMA Style

D.F. Dominković, I. Bačeković, D. Sveinbjörnsson, A.S. Pedersen, G. Krajačić. On the way towards smart energy supply in cities: The impact of interconnecting geographically distributed district heating grids on the energy system. Energy. 2017; 137 ():941-960.

Chicago/Turabian Style

D.F. Dominković; I. Bačeković; D. Sveinbjörnsson; A.S. Pedersen; G. Krajačić. 2017. "On the way towards smart energy supply in cities: The impact of interconnecting geographically distributed district heating grids on the energy system." Energy 137, no. : 941-960.

Conference paper
Published: 01 June 2017 in 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe)
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In the Croatian territory of Adriatic Sea there are 49 inhabited islands with a total population of 124,955 people according to the census from 2011. Many studies and analyses showed that inhabited Croatian islands can all meet their energy needs from locally available renewable energy sources. Studies have been done for the islands of Krk, Unije, Losinj in the North Adriatic, and Mljet, Lastovo and Korcula in the south Adriatic Sea. Building the smart energy systems on the Croatian islands has become crucial in order to increase penetration of renewable energy sources and make local transport more sustainable. In the first part, the paper presents results of modelling of energy systems in Croatian islands with a high share of renewable energy sources, energy storage, hydrogen and electric vehicles. In the second part, the paper brings results of proposed financial mechanisms and strategies for building smart energy systems.

ACS Style

Antun Pfeifer; Fran Boskovic; Viktorija Dobravec; Nikola Matak; Goran Krajacic; Neven Duic; Tomislav Puksec. Building smart energy systems on Croatian islands by increasing integration of renewable energy sources and electric vehicles. 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) 2017, 1 -6.

AMA Style

Antun Pfeifer, Fran Boskovic, Viktorija Dobravec, Nikola Matak, Goran Krajacic, Neven Duic, Tomislav Puksec. Building smart energy systems on Croatian islands by increasing integration of renewable energy sources and electric vehicles. 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe). 2017; ():1-6.

Chicago/Turabian Style

Antun Pfeifer; Fran Boskovic; Viktorija Dobravec; Nikola Matak; Goran Krajacic; Neven Duic; Tomislav Puksec. 2017. "Building smart energy systems on Croatian islands by increasing integration of renewable energy sources and electric vehicles." 2017 IEEE International Conference on Environment and Electrical Engineering and 2017 IEEE Industrial and Commercial Power Systems Europe (EEEIC / I&CPS Europe) , no. : 1-6.

Journal article
Published: 01 December 2016 in Applied Energy
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Alae-Eddine Barkaoui; Stanislav Boldyryev; Neven Duic; Goran Krajacic; Zvonimir Guzović. Appropriate integration of geothermal energy sources by Pinch approach: Case study of Croatia. Applied Energy 2016, 184, 1343 -1349.

AMA Style

Alae-Eddine Barkaoui, Stanislav Boldyryev, Neven Duic, Goran Krajacic, Zvonimir Guzović. Appropriate integration of geothermal energy sources by Pinch approach: Case study of Croatia. Applied Energy. 2016; 184 ():1343-1349.

Chicago/Turabian Style

Alae-Eddine Barkaoui; Stanislav Boldyryev; Neven Duic; Goran Krajacic; Zvonimir Guzović. 2016. "Appropriate integration of geothermal energy sources by Pinch approach: Case study of Croatia." Applied Energy 184, no. : 1343-1349.