Simulation of the Part Load Behavior of Combined Heat Pump-Organic Rankine Cycle Systems

Pumped Thermal Energy Storages (PTES) are suitable for bridging temporary energy shortages, which may occur due to the utilization of renewable sources. A combined heat pump (HP)-Organic Rankine Cycle (ORC) system with thermal storage offers a favorable way store small medium sized applications. To address aspect flexibility, part load behavior HP-ORC system, both having R1233zd(E) (Trans-1-chloro-3,3,3-trifluoropropene) as working fluid and being connected through water filled sensible storage, is investigated using MATLAB code integration database REFPROP. The influence on isentropic efficiency machines therefore power (P2P) complete shown by variation mass flow temperature drop in storage. Further machine-specific parameters such volumetric internal leakage also considered. results show performance characteristics PTES function load. While has only slight effects P2P efficiency, reduction contributes biggest decrease efficiency. Furthermore, simulation dynamic analysis grid settlement conducted course demand, supplied photovoltaic (PV) systems, well indicators throughout an entire year. It that use particularly useful period between winter summer time, when demand approximately equal.