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Turboden s.r.l. – Via Cernaia, 10 25124 Brescia Italy – C. FISC. / P.IVA. IT02582620981 tel +39 030 3552001 – fax +39 030 3552011 – email info@turboden.it – web www.turboden.it The results show that, also in a less favourable scenario, plants with an installed power over 1500 kWel show an acceptable feasibility (discounted PBT about 7-8 years and IRR about 13% for 15 years) with an electricity value of 0,1 Euro/kWhel. Also for smaller plants the impact of an increase of 100% of the biomass cost from 10 Euro/ MWh to 20 Euro/MWh is limited. For example, the payback of the 800 kWel system at an electricity value of 0,14 Euro/kWhel increases by about 1 year from 6 to 7 years (IRR decreases from 19% for 15 years to 16% for 15 years). Resuming biomass cogeneration in sawmills is economically competitive when the right boundary conditions exist. The most important parameters are the size of the plant and the value of electricity. Given the right frame conditions, the investment is safe, being only marginally influenced by biomass cost. 4. CONCLUSIONS The economic analysis performed in this paper shows that the installation of cogeneration units based on thermal oil boilers and Turboden ORC units coupled with drying chambers as heat suppliers for sawmill plants is an economically interesting option under a broad range of frame conditions. Plants starting from 110.000 m3/year of dried production capacity can be economically competitive starting from an electricity value of 0,16 Euro/kWhel (see Figure 3). Even more important is the fact that, due to the additional incomes from electric energy generation, this solution reduces the risk connected with increased biomass costs, being able to generate positive cash flows at much higher fuel costs than the heat only solution. These frame conditions are actually present in many European countries where new sawmill plants are under construction (Germany, Austria, Italy, Belgium, and UK , etc). For a dried production capacity of 250.000 m3/year, a cogeneration plant may be a good solution for covering the own consumption of the sawmill plant also in countries where no support schemes for renewable energy production are implemented, especially if fuel at negligible cost can be used. In this case is shown an acceptable feasibility (discounted PBT up to 5 years) starting from electricity values in the range of 0,10 Euro/kWhel which can be considered a long term average buying rate for industrial customers in many countries in the world. In particular, this gives excellent medium term application opportunities for new plants in Eastern Europe, Russia and North America. The frame conditions described above apply to a big share of the new production capacities planned worldwide both concerning economical conditions (electricity value and biomass cost) and plant size. THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF TURBODEN SRL. DUPLICATION OR DISCLOSURE TO A THIRD PARTY OF THE INFORMATION CONTAINED HEREIN IS EXPRESSELY FORBIDDEN WITHOUT THE WRITTEN CONSENT OF TURBODEN SRL. - QUESTO DOCUMENTO NON DEVE ESSERE RIPRODOTTO NE` DIVULGATO SENZA AUTORIZZAZIONE SCRITTA DI TURBODEN SRL.PDF Image | APPLICATION OF ORC UNITS IN SAWMILLS. TECHNICAL-ECONOMIC CONSIDERATIONS
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