Modelling Analysis for Energy Production Using Wood Biomass

The energy production from biomass is the technology that receives the greatest wariness from outsiders. Combustion and emission of air pollutants, the identification of an any biomass plant with a w aste energy power plant, often interfere with thediffusion of these technologies of energetic conversion at local level. This paper gives rise to describe the characteristics of the operation of a plant for the exploitation of the wood biomass from a short productive chain. The aim is to propose a possible and advantageous solution from a technical and economie point of view but, above all, ecologica!, with the purpose to create a useful tool to relate with the stakeholders tliat operate in thè agricultural and industriai sector. The use of the ORC (Organic Rankine Cycle)energy technology is a solution by now tested and particularly suited for working joint to small size thermal plant operating at low temperature. In this paper, the obtainable energy performances by means of such energy plant joint to boilers fed with wood biomass will be analyzed showing the results of an energy and exergetic modelling of the ORC units. The proposed solution consists in the integration of the firewood boilers with a circuit of diathermic oil able to feed the ORC plant. In this way, we produce power and heat, to be used also for district heating applications, to reach a more complete energy exploitation of the biomass. The simulation model of this energy system has allowed to get with good approximation the obtainable performances. varying some free parameters of design and eontrol, shaping itself as an essential tool in the evaluation of the actual energy saving and of the concrete technical-economic feasibility.