STEAM was responsible in 2012 to write up technical and financial offer for participation in Bari Civil Airport tender for construction and operation of a cogeneration system based on arboreal waste from olive cultivation. STEAM team conducted geological surveys that allowed to evaluate the geomorphological conditions, lito-structural and hydrogeological area as well as interference analysis carried out in situ in the course of inspections and verification of technical feasibility of proposed interventions.
An environmental feasibility study was also performed in order to identify territory specific characteristics, to verify policy and regulatory aspects concerning protection of natural resources and to identify any impacts attributable to the work in question and its exercise as well as to address the localization of mitigation and compensation measures.
The new biomass central is externally characterized by an embankment in adherence and continuity with the morphology of surrounding terrain, for reception of secondary functions (power system, silos, storage, ash container, spaces of subjective and infopoints).
Inside a massive wrap rectangular houses engine room and facilities. Cogeneration system proposed by STEAM is based on the Organic Rankine Cycle (ORC) and consists of two main systems:
- Biomass boiler for diathermic oil production at a temperature of about 300° C;
- Turbogenerator which employs the thermal oil to heat and vaporise another fluid that expands in the turbine, producing electricity.
The advantages of an organic fluid instead of water are:
- High flow and slower;
- Larger diameter of the turbine;
- Less wear of blades and mechanical parts in time.