Bademlioğlu, Ali Hüsnü2024-03-272024-03-272018-10Yamankaradeniz, N. vd. (2018). ''Performance assessments of organic rankine cycle with internal heat exchanger based on exergetic approach''. Journal of Solar Energy Engineering, Transactions of the ASME, 140(10).0195-0738https://asmedigitalcollection.asme.org/energyresources/article-abstract/140/10/102001/368190/Performance-Assessments-of-Organic-Rankine-Cycle?redirectedFrom=fulltexthttps://hdl.handle.net/11452/40630This study makes energy and exergy analysis of a sample organic Rankine cycle (ORC) with a heat exchanger which produces energy via a geothermal source with a temperature of 140 degrees C. R600a is preferred as refrigerant to be used in the cycle. The changes in exergy destructions (of irreversibility) and exergy efficiencies in each cycle element are calculated in the analyses made based on the effectiveness of heat exchanger used in cycle and evaporator temperature changing between 60 and 120 degrees C for fixed pinch point temperature differences in evaporator and condenser. Parameters showing system performance are assessed via second law approach. Effectiveness of heat exchanger and temperature of evaporator are taken into consideration within the scope of this study, and energy and exergy efficiencies of cycle are enhanced maximum 6.87% and 6.21% respectively. Similarly, exergy efficiencies of evaporator, heat exchanger, and condenser are increased 4%, 82%, and 1.57%, respectively, depending on the effectiveness of heat exchanger and temperature of evaporator.eninfo:eu-repo/semantics/closedAccessEnergy & fuelsOrganic Rankine cycleExergy analysisHeat exchangerExergy destructionPinch point temperature differenceOptimal evaporation temperatureWorking fluidsPowerOptimizationOrcSelectionMixturesEvaporatorsExergyGeothermal energyHeat exchangersEnergy and exergy analysisEnergy and exergy efficiencyEvaporator and condensersExergy analysisExergy destructionsOrganic Rankine Cycle(ORC)Organic Rankine cyclesPinch point temperature differencesRankine cycleArticle0004472727000042-s2.0-8505151665714010https://doi.org/10.1115/1.4040108Energy & fuelsRankine Cycle; Working Fluids; Waste Heat Utilization