In the industrial field, in order to promote energy saving and prevent global warming, it is one of the important issues to expand the spread of heat pumps for systems using combustion systems. The final goal of this research is to construct integrated analysis technologies that can realize the optimization of the system including the design and control system from the selection of various refrigerants and cycles by simulation. We have been conducting research with the goal of constructing a simulator that is relatively easy to input calculations, has high accuracy, and can significantly reduce calculation time. In the last fiscal year, we developed "Industrial heat pump simulator", which analyzes a single heat pump using the established system performance evaluation analysis logic for each basic pattern of the system configuration. In this study, we implemented dual refrigerant cycle, which is widely used as an industrial heat pump, into the "Industrial heat pump simulator" to extend its versatility as a simulator.