Boydak, ÖzlemEkmekçi, İsmailYılmaz, MustafaKöten, Hasan2020-11-212020-11-2120180354-9836https://doi.org/10.2298/TSCI170720103Bhttps://hdl.handle.net/11467/3600Recently, new environment-friendly energy conversion technologies are required for using energy resources valid to power generation. Accordingly, low-grade heat sources as solar heat, geothermal energy, and waste heat, which have available temperatures ranging between 60 and 200°C, are supposed as applicants for recent new generation energy resources. As an alternative energy source, such low-grade heat sources usage generating electricity with the help of power turbine cycles was examined through this study. Such systems have existing technologies applicable at low temperatures and a compact structure at low cost, however, these systems have a low thermal efficiency of the Rankine cycles operated at low temperatures. An Organic Rankine Cycle (ORC) is alike to a conventional steam power plant, except the working fluid, which is an organic, high molecular mass fluid with a liquid-vapor phase change, or boiling point, at a lower temperature than the water-steam phase change. The efficiency of an ORC is about between 10% and 20%, depending on temperature levels and availability of a valid fluid. © 2018 Serbian Society of Heat Transfer Engineers.eninfo:eu-repo/semantics/openAccessEnergy efficiencyEnergy recoveryEnergy recovery systemHeat recoveryORCOrganic Rankine cycleOrganic Rankine cycle systemRankine cycleArticle2018Q3WOS:000450540200036Q32-s2.0-8505710954510.2298/TSCI170720103B