Sterically hindered hydrofluoroolefins with dipole moment and their blends with sterically hindered-olefins as refrigerants for high temperature heat pumps and working fluid for organic rankine cycles

Abstract

A variety of methods and compositions are disclosed, including, in one example, a method that includes compressing a working fluid with a compressor to form a compressed working fluid, wherein the working fluid includes at least one Cor Ccis or (Z) hydrofluoroolefins and at least one Cor Ccis olefins, condensing the working fluid to form a condensed working fluid, expanding the working fluid to form an expanded working fluid, and heating the working fluid, wherein heat from a heat source is transferred to a heat sink with the working fluid. In embodiments, the compounds and blends are designed for high temperature heat pump (HTHP) and Organic Rankine Cycle (ORC) applications for waste heat recovery and low-grade renewable (e.g., geothermal & flat panel solar) energy utilization.