In this study, an organic Rankine cycle (ORC) driven by solar energy and industrial waste heat is proposed to achieve a collaborative optimization from the heat source side and the working fluid side. An integrated heat exchanger network-organic Rankine cycle (HEN-ORC) system model is established in the GAMs environment. The parameters of physical properties for the working fluid are calculating by the PR equation of state. The optimal ORC integrated system driven by hybrid heat sources at different inlet temperatures of the waste heat streams are obtained through the developed optimization method. Comparative analysis on the ORC driven by waste heat, ORC driven by solar energy, and the hybrid heat source-driven ORC are conducted. In addition, the influences of working fluids on the system performance is also analyzed.
Keywords Heat exchanger network, Organic Rankine cycle, Hybrid heat source, Integration, Mix integer non-linear programming