Following the construction of the heat recovery system contained in the ovens for the baking of biscuits and crackers, it was decided to proceed with the addition of a high-efficiency trigeneration system for the combined production of electricity, thermal energy, and cooling energy.
Renovis has thus designed a technological centre consisting of an endothermic engine, whose driving force generates a nominal electric power of 1560 kW, and a Fiorini Industries exchanger for heat recovery from the exhaust gases and cooling systems. Thermal recovery is in fact necessary for the system since it enables the production of four distinct thermal vectors: diathermic oil, superheated water, hot water, and icy water by means of an absorption chiller.
Fiorini is essential in this phase as well, providing Renovis with a tank for the accumulation of diathermic oil and its storage during the maintenance operations of the system. The volume of the pressurized tank is also used to ensure compensation for the thermal expansion of the heat transfer fluid during the ignition and shutdown of the heat generator.
The system operates in HEC (High-Efficiency Cogeneration) and is equipped with a monitoring system capable of measuring and logging its performance. There is also a computation system for the continuous measurement of the physical parameters of the exhaust gases and a system for the reduction of NOx emissions. In this case too, the data collected speaks for itself: a saving on electricity of 8,736,000 kWh per year, that is 80% less than the previous system, for a decidedly greener environmental impact, with a reduction of CO2 emissions by 1450 tons per year.