Theoretical study of various thermodynamic cycles concerning their applicability for the utilisation of low-temperature heat sources for energy production
témavezető: Imre Attila
helyszín (magyar oldal): Department of Energy Engineering helyszín rövidítés: EGR
A kutatási téma leírása:
a.) Preliminaries: The need for sustainability forces us to use available sources more efficiently. One of the challenges to solve is the use of low-temperature heat sources (like solar heat, geothermal heat or several kinds of waste heat) to produce electricity. Traditional water/steam-based Rankine cycle cannot be used for this purpose with good efficiency; therefore, other methods have to be developed, or existing methods have to be improved.
b.) Aim of research: Various kinds of thermodynamic cycles, including trans- and supercritical cycles, Kalina- and other binary fluid-cycles, flash-cycles, Stirling-cycles and organic Rankine cycles, are going to be studied. These cycles are proper candidates to be used with heat sources with the maximal temperature below 200 ˚C. For a given thermodynamic cycle, expanders and working fluids, as well as layouts, are going to be chosen to optimise power and or efficiency, while minimising investment and/or maintenance costs. Some heat-storage related problem (i.e. store of heat and turning it into electricity in the proper time, instead of turning it immediately into electricity and store it in that form) important for waste- and solar-heat utilisation will also be studied. Additional studies for relevant fluid properties (for example, study of anomalies in the supercritical pressure/temperature ranges) are also going to be part of the research. Since the utilisation of geothermal energy for electricity production is a novel, but very intensive field in Hungary, some of the studies are planned to be industry-related
c.) Tasks, main items, necessary time:
- review of the literature (6 months)
- study of the low-temperature Stirling cycles (6 months)
- study of the low-temperature cycles using binary working fluids (6 months)
- applicability of Organic Rankine Cycles of the potential heat sources available in Hungary and in Central-Europe (12 months)
- study of various trans- and supercritical cycles (6 months)
- updating and extending the Lindal-diagram related to the use of low-temperature heat sources (6 months)
- writing of the thesis (6 months)
Tasks can be completed parallel.
d.) Required equipment: Computer and numerical environment for modelling and simulation; access to the scientific literature and databases.
e.) Expected scientific results: Developing novel methods for energy production using solar, geothermal or industrial waste heat. 3-5 published papers in international journals with impact factors, as well as to contribute several posters and/or oral presentations on at least 2-3 different scientific conferences.
f.) References:
A. R. Imre and A. Groniewsky: Various ways of adiabatic expansion in Organic Rankine Cycle (ORC) and in Trilateral Flash Cycle (TFC), Zeitschrift für Physikalische Chemie, 233 (2019)577–594.
A. R. Imre, R. Kustán and A. Groniewsky: Thermodynamic Selection of the Optimal Working Fluid for Organic Rankine Cycles, Energies, 12(2019)2028.
előírt nyelvtudás: english felvehető hallgatók száma: 1
Jelentkezési határidő: 2020-09-25
2024. IV. 17. ODT ülés Az ODT következő ülésére 2024. június 14-én, pénteken 10.00 órakor kerül sor a Semmelweis Egyetem Szenátusi termében (Bp. Üllői út 26. I. emelet).
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