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Featured researches published by Tomislav Kurevija.


ESS 2007 Environment: Survival and Sustainability | 2010

Algae Biofuels as a Possible Alternative to Environmentally Doubtful Conventional Methods of Biodiesel Production

Tomislav Kurevija; Nenad Kukulj

In last 10 years there was significant rise in transportation fuel consumption in Europe from 180 Mt in 1985. to 270 Mt in 2004., with gasoline representing 40% and diesel 60%. To decrease dependence upon imported fossil fuels, EU aim is to introduce biodiesel in share of 5.75% in transportation sector until 2010. and finally 8% until 2020. Because of limited production potential from some EU countries, today and in near future, large quotas of import would be required. Biodiesel is often called clean, ecological and renewable alternative fuel, but with present land-intensive methods of production it could easily be named as one of the most dangerous sources of energy for Earth’s ecosystem. Main threat from large scale biofuels utilization comes from deforestation of land that is needed for cultivation of crops. Every year large areas of rainforests in South East Asia and South America are irretrievably lost due to increasing demand. Combustion of wood and oxidation of peat during drying emits enormous quantities of CO2 into the atmosphere which is contrary to biodiesel appellation as “CO2 balanced fuel”. Unlike conventional crops that are used for production of biodiesel (rapeseed, soybean, palm etc.), possible production from algae would significantly lower unit of land needed for biofuel production. Contemporary researches give some estimation of about 25 times greater yield than palm plantation and 100 times over rapeseed, which is common biodiesel production crop in EU. Regarding lately high world oil prices, greater investment in researches upon algae, as a new source of biofuel, are bringing technological solutions for economically production start-up.


Rudarsko-geološko-naftni zbornik | 2017

Development of Tight Oil Resources in USA: Exploitation Costs and Effect of Macroeconomic Indicators in Volatile Oil Price Environment

Kristina Strpić; Monika Miličević; Tomislav Kurevija

During the early stages of the Middle Miocene transgression marine biota invaded the newly formed Paratethys Sea. Reefs and reef-like structures particularly flourished with life, supported by the favourable climate conditions. Miocene biogene buildups show a variety of fossil assemblages and lithologic features. The main reef-builders were bryozoans, coralline algae, corals, oysters, vermetids, sponges and serpulids. Water turbidity and depth were major ecological factors controlling the reef biota. Lithofacies types at the studied localities in Northern Croatia show significant similarity with the Upper Langhian (Middle Badenian) of the Leitha Mountains in Austria, but can also be well compared with Miocene to recent reef structures in the Mediterranean. The Miocene reef-like buildups exhibit different porosity rates and other lithological characteristics.


International Conference on Environment : Survival and Sustainability | 2010

Energy and Environmental Significance of an Alternative Fuels Utilization Produced with to Liquid Technology

Nenad Kukulj; Tomislav Kurevija

Higher costs of crude oil on world market, as well as awareness about negative environmental impact related to conventional diesel fuel utilization, are creating favourable economic conditions for production expansion and greater application of alternative fuels. Natural gas could be converted through Fischer-Tropsch synthesis technology process, dating from the beginning of the last century, to alternative form of fuel named Gas to Liquid (GTL) which can be utilized in all recent diesel engines. GTL has lower emissions in comparison to fossil diesel and it is characterized with higher cetane number which is measurement of the fuel ignition quality. Furthermore, additional advantage is that the existing infrastructure for fuel transportation and distribution could be used without any significant changes, either for pure GTL or blend with diesel. In compliance with present and future EU directives, concerning greenhouse gases reduction and decrement of imported crude oil dependence, Gas to Liquid technology imposes as one of the alternative fuels for utilization in transportation sector.


Energy Conversion and Management | 2012

Effect of Borehole Array Geometry and Thermal Interferences on Geothermal Heat Pump System

Tomislav Kurevija; Domagoj Vulin; Vedrana Krapec


World Renewable Energy Congress – Sweden, 8–13 May, 2011, Linköping, Sweden | 2011

Influence of Undisturbed Ground Temperature and Geothermal Gradient on the Sizing of Borehole Heat Exchangers

Tomislav Kurevija; Domagoj Vulin; Vedrana Krapec


Water Resources Management | 2011

High Enthalpy Geothermal Potential of the Deep Gas Fields in Central Drava Basin, Croatia

Tomislav Kurevija; Domagoj Vulin


Sustainable Cities and Society | 2017

Impact of grout thermal conductivity on the long-term efficiency of the ground-source heat pump system

Tomislav Kurevija; Marija Macenić; Staša Borović


Energy | 2012

The effect of mechanical rock properties on CO2 storage capacity

Domagoj Vulin; Tomislav Kurevija; Iva Kolenkovic


The Mining-Geological-Petroleum Engineering Bulletin | 2014

IMPACT OF GEOTHERMAL GRADIENT ON GROUND SOURCE HEAT PUMP SYSTEM MODELING

Tomislav Kurevija; Domagoj Vulin; Marija Macenić


Rudarsko-geološko-naftni zbornik | 2010

DETERMINING UNDISTURBED GROUND TEMPERATURE AS PART OF SHALLOW GEOTHERMAL RESOURCES ASSESSMENT

Tomislav Kurevija; Domagoj Vulin

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