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Open AccessArticle

Analysis of Medium-Scale Solar Thermal Systems and Their Potential in Lithuania

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Faculty of Civil Engineering and Architecture, Kaunas University of Technology, Studentų str. 48, Kaunas LT-44029, Lithuania
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Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentų str. 56, Kaunas LT-51424, Lithuania
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Laboratory of Renewable Energy, Lithuanian Energy Institute, Breslaujos str. 3, Kaunas LT-44403, Lithuania
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Author to whom correspondence should be addressed.
Academic Editor: Chi-Ming Lai
Energies 2015, 8(6), 5725-5737; https://doi.org/10.3390/en8065725
Received: 20 March 2015 / Accepted: 4 June 2015 / Published: 16 June 2015
Medium-scale solar hot water systems with a total solar panel area varying from 60 to 166 m2 have been installed in Lithuania since 2002. However, the performance of these systems varies depending on the type of energy users, equipment and design of the systems, as well as their maintenance. The aim of this paper was to analyse operational SHW systems from the perspective of energy production and economic benefit as well as to outline the differences of their actual performance compared to the numerical simulation results. Three different medium-scale solar thermal systems in Lithuania were selected for the analysis varying in both equipment used (flat type solar collectors, evacuated tube collectors) and type of energy user (swimming pool building, domestic hot water heating, district heating). The results of the analysis showed that in the analysed cases the gap between measured and modelled data of heat energy produced by SHW systems was approx. 11%. From the economical perspective, the system with flat type solar collectors used for domestic hot water production was proved to be most efficient. However, calculation of Internal Rate of Return showed that a grant of 35% is required for this project to be fully profitable. View Full-Text
Keywords: solar heat energy; solar water heating; simulation and monitoring; energy analysis; financial analysis solar heat energy; solar water heating; simulation and monitoring; energy analysis; financial analysis
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MDPI and ACS Style

Valančius, R.; Jurelionis, A.; Jonynas, R.; Katinas, V.; Perednis, E. Analysis of Medium-Scale Solar Thermal Systems and Their Potential in Lithuania. Energies 2015, 8, 5725-5737.

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