Experimental investigations into power generation with low grade waste heat and R245fa Organic Rankine Cycles (ORCs)

• DOI: 10.1016/j.applthermaleng.2017.01.024
• Publication Date: 2017-01-10T18:45:11Z
• Authors: L. Li; Y.T. Ge; X. Luo; S.A. Tassou
• Keywords: Organic Rankine Cycle; Working fluid; Condenser (optics); Degree Rankine; Thermal efficiency

In this study, experimental research was conducted to investigate the performance of a small-scale Organic Rankine Cycle (ORC) system utilising low grade heat sources generate electric power at different operating conditions. The experiment setup consisted typical ORC components, such as turboexpander with high speed generator, finned-tube condenser, pump and plate evaporator. R245fa selected working fluid in system, considering its appropriate thermosphysical properties for ozone depletion potential (ODP). At constant sink (ambient) parameters, extensive experiments were carried out examine effects various important parameters including source temperature etc. on performance. Results showed that fixed speed, thermal efficiency tested could be improved an increased temperature. On other hand, temperature, optimised maximise efficiency. Both found determining component operations. outcomes can instruct future optimal design controls.