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APPLICATION OF ORC UNITS IN SAWMILLS. TECHNICAL-ECONOMIC CONSIDERATIONS

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APPLICATION OF ORC UNITS IN SAWMILLS. TECHNICAL-ECONOMIC CONSIDERATIONS ( application-orc-units-in-sawmills-technical-economic-conside )

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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 PAPER APPLICATION OF ORC UNITS IN SAWMILLS. TECHNICAL-ECONOMIC CONSIDERATIONS Ilaria Peretti – Turboden srl, Via Cernaia, 25124 Brescia – I - tel. +39 030-3552001, fax +39 030-3552011, ilaria.peretti@turboden.it Abstract In the last years, Turbodeni ORC modules have become more and more popular on the market thanks to the high efficiency, the high availability and the low operational costs in comparison with other technologies. Nowadays there are 78 plants in operation in different European countries. A survey of the main references in the wood industry and of the developments over the last years. This article shows a typical application in sawmills with drying chambers based on a biomass combustion system and an ORC unit This application of ORC units is particularly interesting because additional income can be obtained from electricity generated by the ORC unit without significant changes to the typical sawmill. Part of the electricity generated is used for the own consumption of the plant and the remaining part is sold to the grid, according to the market conditions about electricity value and possible subsidies (green certificates or feed-in tariffs) for renewable energy applied in the different countries. For this reason many of the new sawmill plants recently built or under construction are based on CHP solutions with ORC units. A detailed costs/advantages analysis of the implementation in sawmill plants is performed. This study is based on a differential economic analysis between a CHP system based on ORC technology and a biomass boiler heating hot water for the same drying chambers. The financial results are calculated in terms of discounted Pay Back Time of the additional investment required by the cogenerative solution depending on a wide range of fuel and electricity values in full CHP mode. 04/09/2008 i More information about Turboden in the Appendix 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.

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