1. Thermal analysis and application of roll bond solar absorbers for heating and cooling in residential buildingsJurij Avsec, Daniel Brandl, Helmut Schober, Urška Novosel, Janko Ferčec, 2019, original scientific article Abstract: The use of renewable energy sources will have to be increased significantly over the coming decades. The potential of solar energy in Slovenia represents the largest share of renewable energy sources. This article shows the use of roll bond solar absorbers for the heating and cooling of houses. For this purpose, we performed a numerical simulation of solar absorbers and theoretical calculations.
Keywords: roll bond technology, STAF panel, solar technology, heat pump
Published in DKUM: 05.12.2023; Views: 5; Downloads: 0
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2. Production, thermal analysis and application of roll bond solar absorbers for heating and cooling in residential buildingsJurij Avsec, Daniel Brandl, Helmut Schober, Urška Novosel, Janko Ferčec, 2019, published scientific conference contribution Abstract: The effects of global warming are a crucial issue in the near future. The combination of renewable energy sources (RES) and the use of alternative energy technology such as heat pumps and hydrogen technology could solve major ecological problems. In Central Europe, the energy demand for heating and cooling in residential buildings is clearly higher than for generation of electricity or energy for trucking e.g. In this paper, a new solar thermal absorber has been analysed which is produced by using the so called "roll bond" technology (ABS Network, 2018). The focus of this study lies on the determination of the energy efficiency by combining this solar thermal absorber with heat pumps and biomass or geothermal systems in the region of Central Europe.
Keywords: roll bond solar absorbers, thermal analysis, solar
systems, heat pump systems, heating and cooling in residential
buildings
Published in DKUM: 04.12.2023; Views: 5; Downloads: 0
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3. Multi-purpose use and lifecycle analysis of solar panelsDušan Strušnik, Urška Novosel, Jurij Avsec, 2020, original scientific article Abstract: The combined use of renewable energy technologies and alternative energy technologies is a promising approach to reduce global warming effects throughout the world. In this paper, the solar panel is used in combination with a heat pump or with biomass sources to obtain heat, electricity, and hydrogen. Based on the Rankine thermodynamic cycle, hydrogen could be obtained from water with electrolysis and the CuCl thermochemical cycle. Furthermore, this study contains a life cycle analysis of solar panels.
Keywords: heat pump, life cycle analysis, Rankine cycle, solar panel, thermochemical cycle
Published in DKUM: 01.12.2023; Views: 58; Downloads: 1
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4. Determination of produced and consumed electricity of a residential building using a graphical user interfaceEva Simonič, Iztok Brinovar, Sebastijan Seme, Klemen Sredenšek, 2021, professional article Abstract: The primary objective of this paper is to present a graphical user interface for the calculation of electricity produced by a photovoltaic system and electricity consumed by a heat pump. The produced electricity is determined by a multi-year average of measurements of the global and diffuse power density of solar radiation for several places in Slovenia, while consumed electricity is determined based on the required heat for heating a residential building and domestic water. The calculation of produced and consumed electricity is validated by measurements on a real system. The developed graphical user interface enables simple user inputs of the photovoltaic system, heat pump, and the considered residential building, and provides a comprehensive technical analysis for installing both systems at the same location.
Keywords: graphical user interface, photovoltaic system, heat pump, production of electricity, consumption of electricity
Published in DKUM: 13.11.2023; Views: 46; Downloads: 4
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5. Future trends in photovoltaics : hybrid photovoltaic/thermal systemKlemen Sredenšek, Iztok Brinovar, Gregor Srpčič, Miralem Hadžiselimović, Bojan Štumberger, Amor Chowdhury, Sebastijan Seme, 2022, published scientific conference contribution abstract Keywords: hybrid photovoltaic/thermal system, photovoltaic system, heat pump, waste heat
Published in DKUM: 27.10.2023; Views: 124; Downloads: 5
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6. Geothermal heat potential - the source for heating greenhouses in Southestern EuropeDanijela Urbancl, Peter Trop, Darko Goričanec, 2016, original scientific article Abstract: The paper presents economically evaluated solutions for heating greenhouses with geothermal potential, if the same greenhouse is placed in two different locations in Southeastern Europe, one in Slovenia and the other in Serbia. The direct geothermal water exploitation using heat exchangers is presented and the remaining heat potential of already used geothermal water is exploited using high temperature heat pumps. Energy demands for heating greenhouses are calculated considering climatic parameters of both locations. Furthermore, different constructions materials are taken into account, and energy demands are evaluated if the same greenhouse is made of 4 mm toughened single glass, double insulated glass or polycarbonate plates. The results show that the geothermal energy usage is economically feasible in both locations, because payback periods are in range from two to almost eight years for different scenarios.
Keywords: geothermal heat exploitation, greenhouses energy demands, high temperature heat pump, economic analysis
Published in DKUM: 07.07.2017; Views: 1238; Downloads: 369
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8. Using steam as an alternative motive fluid in the existing turbine ejector system of the Ljubljana District Heating PlantDušan Strušnik, Jurij Avsec, 2013, original scientific article Keywords: analysis, ejector, heat flow, oscillation, reconstruction, reliability of production, pump system, motive steam, turbine condenser
Published in DKUM: 10.07.2015; Views: 1737; Downloads: 48
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