This thesis presents the modeling, construction, and testing of a cost-effective Rankine cycle that utilizes a low-grade heat source (100°C); a non-toxic, environmentally benign working fluid (heptafluoropropyl methyl ether, or HFE-7000); and a scroll-type expander to generate electric power. A thermal efficiency of 3.1% was achieved, and a clear path forward has been presented to achieve 9.7% efficiency. This experiment validates the use of HFE-7000 as a working fluid in a Rankine cycle -- both in a custom application or as a drop-in replacement for less-desirable fluids. Such a system has potential uses that include bottoming cycles for industrial processes and inexpensive non-concentrating solar-thermal power plants.
