Combined MGT – ORC solar – hybrid system. PART B : Component Analysis and Prime Mover Selection

摘要

This paper starts from the results of the paper “Combined MGT – ORC solar – hybrid system. Part A: plant optimization PART\udA” and, as far as the selection of the ORC expander is concerned, different solutions are compared between radial turbines,\udvolumetric and scroll expanders.\udA preliminary extended similarity study aids the search of the most suitable expander to be adapted to the ORC application.\udActually, the most critical aspects regard the change in the operating fluid with dramatically different characteristics in terms of\udcompressibility effects, molecular weight, and transport properties.\udOnce the adaptability of an existing expander to such a different fluid has been detected, the effectiveness of this choice is validated\udby a CFD analysis. The component analysis is completed by the investigation of the reacting flow through the MGT combustor\udsupplied with natural gas or biogas.