TY - JOUR
TI - Thermodynamic investigation of organic Rankine cycle energy recovery system and recent studies
AU - Boydak Özlem
AU - Ekmekçi Ismail
AU - Yilmaz Mustafa
AU - Köten Hasan
JN - Thermal Science
PY - 2018
VL - 22
IS - 6
SP - 2679
EP - 2690
PT - Article
AB - Recently, 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.