Thermal and economic analysis of biomass and solar assisted organic rankine cycle

In this thesis, biomass and solar fired organic Rankine cycle (ORC) are examined. There is two parts in this study; steady state analysis and transient analysis. Firstly, three different ORC system is chosen. These systems differ from each other in terms of the energy technology providing the heat transfer to the ORC. For this purpose, biomass burner, parabolic trough solar collector (PTSC), and a combination of those are used. For analyses, numerous control volumes surrounding the system components are formed. Then, applying energy, exergy and thermoeconomic analysis around these control volumes, efficiencies, and cost per unit of exergy are calculated. The effects of biomass type and solar irradiation on the performance and cost are assessed. The energy and exergy-based performance and electricity cost of these systems are also compared with each other for the baseline conditions and different number of PTSCs. In the second stage of the study, dynamic analysis with hybrid system was examined. Within the scope of this study, it is aimed to provide electrical power to ORC system and batteries for a small application without electricity grid. The power produced by the ORC system is variable according to the hourly electricity demand of the application, and the electrical power is supplied from the batteries according to the need or the electrical power is stored in the batteries. Dynamic analysis was performed with TRNSYS program and economic comparison of ORC system with 3 different partial load ranges are made.