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Andrej Gubina
Laboratory of Energy Policy, Faculty of Electrical Engineering, Univerza v Ljubljani, Tržaška Cesta 25, SI-1000 Ljubljana, Slovenia

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Journal article
Published: 03 June 2021 in Sustainability
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The goal to decrease greenhouse gas (GHG) emissions is spurring interest in renewable energy systems from time-varying sources (e.g., photovoltaics, wind) and these can require batteries to help load balancing. However, the batteries themselves add additional GHG emissions to the electricity system in all its life cycle phases. This article begins by investigating the GHG emissions for the manufacturing of two stationary lithium-ion batteries, comparing production in Europe, US and China. Next, we analyze how the installation and operation of these batteries change the GHG emissions of the electricity supply in two pilot sites. Life cycle assessment is used for GHG emissions calculation. The regional comparison on GHG emissions of battery manufacturing shows that primary aluminum, cathode paste and battery cell production are the principal components of the GHG emissions of battery manufacturing. Regional variations are linked mainly to high grid electricity demand and regional changes in the electricity mixes, resulting in base values of 77 kg CO2-eq/kWh to 153 kg CO2-eq/kWh battery capacity. The assessment of two pilot sites shows that the implementation of batteries can lead to GHG emission savings of up to 77%, if their operation enables an increase in renewable energy sources in the electricity system.

ACS Style

Johanna Pucker-Singer; Christian Aichberger; Jernej Zupančič; Camilla Neumann; David Bird; Gerfried Jungmeier; Andrej Gubina; Andreas Tuerk. Greenhouse Gas Emissions of Stationary Battery Installations in Two Renewable Energy Projects. Sustainability 2021, 13, 6330 .

AMA Style

Johanna Pucker-Singer, Christian Aichberger, Jernej Zupančič, Camilla Neumann, David Bird, Gerfried Jungmeier, Andrej Gubina, Andreas Tuerk. Greenhouse Gas Emissions of Stationary Battery Installations in Two Renewable Energy Projects. Sustainability. 2021; 13 (11):6330.

Chicago/Turabian Style

Johanna Pucker-Singer; Christian Aichberger; Jernej Zupančič; Camilla Neumann; David Bird; Gerfried Jungmeier; Andrej Gubina; Andreas Tuerk. 2021. "Greenhouse Gas Emissions of Stationary Battery Installations in Two Renewable Energy Projects." Sustainability 13, no. 11: 6330.

Proceedings
Published: 08 January 2021 in Proceedings
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This paper assesses storage applications from an environmental, economic and technical dimension. Three different demonstration set-ups are considered, as well as one large-scale simulation. The results emphasize that storage needs to be tailored to a specific purpose and tradeoffs between the three perspectives have to be considered to benefit the entire energy system. Currently, system integration and the possibility to use the grid as storage are hampering the potential of storage. It is however shown that storage can provide valuable technical and environmental benefits to the grid and possibly defer grid investment.

ACS Style

Camilla Neumann; Johanna Pucker-Singer; Andreas Türk; Jernej Zupančič; Andrej Gubina. The Role of Storage Systems in Industrial and Residential Environments. Proceedings 2021, 65, 25 .

AMA Style

Camilla Neumann, Johanna Pucker-Singer, Andreas Türk, Jernej Zupančič, Andrej Gubina. The Role of Storage Systems in Industrial and Residential Environments. Proceedings. 2021; 65 (1):25.

Chicago/Turabian Style

Camilla Neumann; Johanna Pucker-Singer; Andreas Türk; Jernej Zupančič; Andrej Gubina. 2021. "The Role of Storage Systems in Industrial and Residential Environments." Proceedings 65, no. 1: 25.

Original article
Published: 17 December 2020 in Energy Efficiency
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Which attributes are the most important when buying a property? How much do individuals value energy efficiency? What discount rates do individuals employ when investing in energy efficiency and which factors influence them? This paper examines the results of a stated preference consumer survey undertaken in Slovenia in late 2017 to investigate these questions, also trying to answer how much the consumers are willing to consider future energy savings associated with the purchase of advanced home heating controls. The results show that energy efficiency as a decision-making attribute is very important for Slovenians, being the second most important after the property price. Females, environmentally aware and married individuals are more likely to value energy efficiency highly when buying a property. Interest in energy-efficient heating controls’ investment confirms the notion that people tend to discount the future benefits at 40%, on average, and give more importance to future energy savings when the investment cost is higher. Females favour higher implicit discount rates and shorter payback periods and therefore expect a higher return (energy savings) on the investment while people with higher education levels value future costs more and are willing to invest more due to the increased benefits of energy efficiency.

ACS Style

Edin Lakić; Dimitris Damigos; Andrej F. Gubina. How important is energy efficiency for Slovenian households? A case of homeowners and potential homebuyers and their willingness to invest in more efficient heating controls. Energy Efficiency 2020, 14, 1 -17.

AMA Style

Edin Lakić, Dimitris Damigos, Andrej F. Gubina. How important is energy efficiency for Slovenian households? A case of homeowners and potential homebuyers and their willingness to invest in more efficient heating controls. Energy Efficiency. 2020; 14 (1):1-17.

Chicago/Turabian Style

Edin Lakić; Dimitris Damigos; Andrej F. Gubina. 2020. "How important is energy efficiency for Slovenian households? A case of homeowners and potential homebuyers and their willingness to invest in more efficient heating controls." Energy Efficiency 14, no. 1: 1-17.

Proceedings
Published: 01 January 2019 in Proceedings
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The Clean Energy Package foresees a strong roll out of decentralized energy systems with renewable generation and storage. The STORY project has designed and tested six different storage solutions for a decentralized renewable energy system. In the workshop organised in the frame of SP19 conference, we highlighted some of the economic, social and technical barriers to storage in Europe and how these have been addressed.

ACS Style

Mia Ala-Juusela; Jernej Zupančič; Andrej F. Gubina; Andreas Tuerk; Ala- Juusela. Clean Energy Storage Workshop. Proceedings 2019, 20, 20 .

AMA Style

Mia Ala-Juusela, Jernej Zupančič, Andrej F. Gubina, Andreas Tuerk, Ala- Juusela. Clean Energy Storage Workshop. Proceedings. 2019; 20 (1):20.

Chicago/Turabian Style

Mia Ala-Juusela; Jernej Zupančič; Andrej F. Gubina; Andreas Tuerk; Ala- Juusela. 2019. "Clean Energy Storage Workshop." Proceedings 20, no. 1: 20.

Journal article
Published: 30 June 2018 in International Review of Electrical Engineering (IREE)
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The agriculture and food-processing industries demand a lot of energy. The same can be applied to small agriculture farms isolated from the electric power grid. The use of electrical and heat energy makes a significant business cost in these economies. As a result, the decision on how the electrical and the heat energy can be provided for the agriculture farms isolated from the electric power grid in economical and reliable way is of a crucial importance for their further business and life quality. The electrical and the heat energy need has been investigated for the farms scattered through the Bosnia mountains sites that are away from electric power grid. Besides the energy needs, other aspects of energy solutions for the farms have been researched, such as those of the environmental, technical, and economical nature, and the reliability of the offered solutions. The analysis was carried out by using a hybrid algorithm based on the analytical hierarchy process and techno-economic analysis. Copyright © 2018 Praise Worthy Prize - All rights reserved.

ACS Style

Irena Rozić; Besim Imamović; Jerko Pavličević; Andrej Ferdo Gubina; Suad Smail Halilčević. The Energy Sustainability of the Small Agricultural Farms Isolated of Electric Power Grid. International Review of Electrical Engineering (IREE) 2018, 13, 229 .

AMA Style

Irena Rozić, Besim Imamović, Jerko Pavličević, Andrej Ferdo Gubina, Suad Smail Halilčević. The Energy Sustainability of the Small Agricultural Farms Isolated of Electric Power Grid. International Review of Electrical Engineering (IREE). 2018; 13 (3):229.

Chicago/Turabian Style

Irena Rozić; Besim Imamović; Jerko Pavličević; Andrej Ferdo Gubina; Suad Smail Halilčević. 2018. "The Energy Sustainability of the Small Agricultural Farms Isolated of Electric Power Grid." International Review of Electrical Engineering (IREE) 13, no. 3: 229.

Journal article
Published: 01 August 2016 in Energy
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Highlights•Investigating gaps and evaluation of EMS use in Slovenian industry.•Analysis based on the developed self-assessment tool 3EMT.•Existing EMS do not include all the requirements for the industrial operations.•Constructive cooperation between all stakeholders is of crucial importance. AbstractIndustrial energy management systems, which comprise software solutions, upfront services, and ongoing monitoring and management, enable industrial companies to actively manage their energy consumption and energy procurement activities. Energy management systems are usually tailored to the specific industrial needs but may offer limited functionalities, mostly as a result of different identified gaps (process simplifications, improper measurement points, a lack of motivation, etc.). A survey was conducted in order to analyse the gaps and use of energy management systems in Slovenian industry. The results of the survey presented in this paper demonstrate that the use of energy management systems in industry is recognised as a potential competitive advantage by most of the addressed companies. Furthermore, motivation was highlighted as an important prerequisite for process and structural improvements and reported to be thus far insufficiently addressed. Furthermore, the importance of strong cooperation with actors at different levels of industry, namely the executive and shop floor levels, is addressed. In the conclusion, possibilities for new opportunities in the exploitation of energy efficiency through the use of industrial energy management systems are discussed.

ACS Style

Matevz Pusnik; Fouad Al-Mansour; Boris Sucic; A.F. Gubina. Gap analysis of industrial energy management systems in Slovenia. Energy 2016, 108, 41 -49.

AMA Style

Matevz Pusnik, Fouad Al-Mansour, Boris Sucic, A.F. Gubina. Gap analysis of industrial energy management systems in Slovenia. Energy. 2016; 108 ():41-49.

Chicago/Turabian Style

Matevz Pusnik; Fouad Al-Mansour; Boris Sucic; A.F. Gubina. 2016. "Gap analysis of industrial energy management systems in Slovenia." Energy 108, no. : 41-49.

Journal article
Published: 01 July 2016 in Solar Energy
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The required rate of return (RROR) is a key input in the calculation of levelized cost of electricity, investment decisions and in policy making. The methodology proposed in this paper determines an adequate RROR for grid-connected photovoltaic (GCPV) systems. A calculation of RROR under market conditions has been carried out for four Eurozone countries as well as the assessment of the impact of feed-in-tariff (FIT) support schemes on risk reduction. Moreover, a formula has been proposed to quickly calculate the RROR for GCPV systems based on country risk, risk-free rate and FIT period length if relevant. The methodology can be further applied to other renewable energy sources and can be used to evaluate different support schemes.

ACS Style

Borut Del Fabbro; Aljoša Valentinčič; Andrej F. Gubina. An adequate required rate of return for grid-connected PV systems. Solar Energy 2016, 132, 73 -83.

AMA Style

Borut Del Fabbro, Aljoša Valentinčič, Andrej F. Gubina. An adequate required rate of return for grid-connected PV systems. Solar Energy. 2016; 132 ():73-83.

Chicago/Turabian Style

Borut Del Fabbro; Aljoša Valentinčič; Andrej F. Gubina. 2016. "An adequate required rate of return for grid-connected PV systems." Solar Energy 132, no. : 73-83.

Journal article
Published: 30 September 2011 in Engineering Applications of Artificial Intelligence
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This paper describes a method for fuzzy calculation of power system reliability. It introduces a composite fuzzy security and fuzzy adequacy indices encompassing the power system segments of generation, transmission, and the segment of load nodes. The fuzzy security index is determined by the security membership grades of the power system components which are found to be the worst in their segments. The fuzzy adequacy index is based on the adequacy indices of generation, transmission, and transmission integration segments. The composite fuzzy reliability index enables the system operator to have a continuous insight into the distance between the power system's actual state and the closest unreliable state by tracking the system's components with the lowest security and adequacy membership grades of the respective segments. The algorithm has been tested on the models of the IEEE Three Area RTS-96 and Bosnia–Herzegovina power systems.

ACS Style

Suad Smail Halilčević; Ferdinand Gubina; Andrej Ferdo Gubina. The composite fuzzy reliability index of power systems. Engineering Applications of Artificial Intelligence 2011, 24, 1026 -1034.

AMA Style

Suad Smail Halilčević, Ferdinand Gubina, Andrej Ferdo Gubina. The composite fuzzy reliability index of power systems. Engineering Applications of Artificial Intelligence. 2011; 24 (6):1026-1034.

Chicago/Turabian Style

Suad Smail Halilčević; Ferdinand Gubina; Andrej Ferdo Gubina. 2011. "The composite fuzzy reliability index of power systems." Engineering Applications of Artificial Intelligence 24, no. 6: 1026-1034.

Conference paper
Published: 01 June 2006 in 2006 International Conference on Probabilistic Methods Applied to Power Systems
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Due to their unique characteristics, renewable energy sources (RES) are an ideal energy source for small isolated power systems (SIPS). At the same time, the reliability impacts of RES electricity supply should be carefully studied, especially in SIPS with significant RES installed capacity. One of the most potent methods for this purpose is system well-being analysis, accounting for deterministic and stochastic reliability factors. In the paper, we present a novel method for calculation of system well-being indices based on contingency enumeration (CE) method. We also investigate the energy-oriented energy not served (ENS) index and propose an improved method for its calculation. The indices are then used to analyze the impacts of different hybrid generation structures and RES penetration levels on supply reliability of the system. We investigate the suitability of different reliability assessment schemes and pertaining indices for reliability of hybrid energy sources in SIPS. The results show-that due to the ability of the ENS index to measure the severity of the risky state, both types of indices are needed to satisfactorily observe the supply reliability, especially in hybrid-supplied SIPS

ACS Style

G. Taljan; M. Pantoš; A. F. Gubina. Unified Approach to Reliability Assessment in an Isolated RES System. 2006 International Conference on Probabilistic Methods Applied to Power Systems 2006, 1 -6.

AMA Style

G. Taljan, M. Pantoš, A. F. Gubina. Unified Approach to Reliability Assessment in an Isolated RES System. 2006 International Conference on Probabilistic Methods Applied to Power Systems. 2006; ():1-6.

Chicago/Turabian Style

G. Taljan; M. Pantoš; A. F. Gubina. 2006. "Unified Approach to Reliability Assessment in an Isolated RES System." 2006 International Conference on Probabilistic Methods Applied to Power Systems , no. : 1-6.