Cementirossi Pederobba waste heat recovery ORC

A 3.5 MWe waste heat recovery Organic Rankine Cycle unit installed by Exergy in 2020 at the CementiRossi cement factory in Pederobba, Italy, recovering heat from a 2500 tpd clinker line via diathermic oil at 280 °C to 100 °C. Because the site had little space and strict noise limits, the unit was preassembled on skids, with the turbines, generator and lube and seal oil unit enclosed in a standard ISO 40 container that also mitigates noise. The customer required a non-flammable working fluid, so Exergy optimised the cycle design and added a reheating system, which the maker says yields 10% additional cycle efficiency compared with an analogous cycle at the same temperature limit. The plant is air-cooled, installed outdoors, and reports a gross efficiency of 22.8%.