Thermoeconomic Evaluation of Modular Organic Rankine Cycles for Waste Heat Recovery over a Broad Range of Heat Source Temperatures and Capacities

摘要: Industrial waste heat recovery by means of an Organic Rankine Cycle (ORC) can contribute to the reduction CO2 emissions from industries. Before market penetration, high efficiency modular concepts have be developed achieve appropriate economic value for industrial decision makers. This paper aims investigate modularly designed ORC systems a thermoeconomic point view. The main goal is recommendation suitable chemical class working fluids, preferable design and range source temperatures thermal capacities in which ORCs economically feasible. For this purpose, model has been based on size complexity parameters components. Special emphasis laid turbine model. reveals that alkylbenzenes lead higher exergetic efficiencies compared alkanes siloxanes. However, model, payback periods classes are almost identical. With design, boundary conditions study, hexamethyldisiloxane fluid leads period less than 5 years temperature 400 600 °C mass flow rate gaseous stream more 4 kg/s.