This document presents a review of the technological evolution of power generation from residual thermal sources as contemplated by new technologies in ORC (Organic Rankine Cycle) systems, to seek greater efficiencies and lower costs per unit of kw generated. These systems have been improving their thermodynamic performance because of the research regarding the development of their components and the improvements in current applications, since this allows an additional output power generation. The scientific development challenges associated with ORC technology such as workflow, equipment architecture, ORC expanders and applications of these technologies are discussed. It was also found that R245fa is one of the best working fluids in ORC technology because of its low environmental impact but its impact on global warming is still considered an impediment and therefore other alternatives such as the R1233zd are being investigated. Regarding commercial applications of this technology, it was found that there are facilities at a global level that use geothermal energy as a source of heat, followed using residual heat and to a lesser extent biomass.
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