Thermodynamic analysis of organic Rankine cycle using zeotropic mixtures

Thermo-Economic Evaluation of Organic Rankine Cycles for Geothermal Power Generation Using Zeotropic Mixtures

“…In the context of geothermal applications, several case studies are performed for zeotropic mixtures as ORC working fluids considering subcritical and transcritical cycles [11][12][13]. More comprehensive analyses including sensitivity for crucial parameters, like mixture composition, heat source temperature or temperature difference of the cooling media are recently performed [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. In general, results confirm the potential for an increase in efficiency of ORC systems by the use of zeotropic mixtures as working fluids.…”

A general framework to select working fluid and configuration of ORCs for low-to-medium temperature heat sources

“…Results showed that the ORC performance obtained with mixtures is not always better than that of pure working fluids. Zhao and Bao [36] found that the superiority of zeotropic mixtures in ORC systems is closely related to the heat source inlet temperature. Above a certain temperature, zeotropic mixtures are less performing than pure working fluids.…”

Theoretical analysis of a combined power and ejector refrigeration cycle using zeotropic mixture

“…It was found that for zeotropic mixtures a significant improvement of thermal efficiencies could be gained when superheating is combined with IHE. The experimental data presented by Wang et al [13] showed that the collector efficiency and thermal efficiency of zeotropic mixture are comparatively higher than pure R245fa in the experimental condition. The system power output with zeotropic mixture M3 (R245fa/R152a, 0.7/0.3) is higher than that with M1 (R245fa) and M2 (R245fa/R152a, 0.9/0.1) by 29.10% and 28.03%, respectively.…”