Science – Future of Lithuania / Mokslas – Lietuvos Ateitis, Vol 5, No 4 (2013)

A Comparison of the Thermodynamic Efficiency of Vacuum Tube and Flat Plate Solar Collector Systems

Juozas Bielskus (Vilnius Gediminas Technical University, Lithuania)
Karolis Januševičius (Vilnius Gediminas Technical University, Lithuania)
Vytautas Martinaitis (Vilnius Gediminas Technical University, Lithuania)


The article presents simulation based exergy analysis used for comparing solar thermal systems applied for preparing domestic hot water. The simulation of flat and vacuum tube solar collector systems was performed in TRNSYS simulation environment. A period of one year under Lithuanian climate conditions was chosen. Simulation was performed on 6 min time step resolution by calculating energy and exergy flows and creating balance calculation. Assessment results at system and element levels have been presented as monthly variation in efficiency. The conducted analysis has revealed that the systems designed to cover equal heat energy demand operates in different exergetic efficiencies.

Article in Lithuanian

Article in: Lithuanian

Article published: 2013-11-25

Keyword(s): exergy; TRNSYS; solar thermal collector system; efficiency

DOI: 10.3846/mla.2013.64

Full Text: PDF pdf

Science – Future of Lithuania / Mokslas – Lietuvos Ateitis ISSN 2029-2341, eISSN 2029-2252
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 License.