A comprehensive review article on ORC power systems technology, including information on the history, state of the art, and possible future development, has been published on the ASME Journal of Engineering for Gas Turbines and Power. The full reference is

Colonna P, et al. Organic Rankine Cycle Power Systems: From the Concept to Current Technology, Applications, and an Outlook to the Future. ASME. J. Eng. Gas Turbines Power. 2015;137(10):100801-19. doi:10.1115/1.4029884 .

The article can be downloaded from the ASME digital collection here