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LOW EMISSION BIO ORC Final summary report Project Reference: NNE5/2000/475 Contract No. NNE5/2000/475 1 EESD - PART B - PROJECT „FUZZY LOGIC CONTROLLED CHP PLANT FOR BIOMASS FUELS BASED ON A HIGHLY EFFICIENT ORC PROCESS“ Project Co-ordinator: Stadtwärme Lienz Vertriebs und Produktions GmbH (Austria) Project Partners: TURBODEN Srl (Italy), BIOS BIOENERGIESYSTEME GmbH (Austria) Technische Universität Bergakademie Freiberg (Germany) 1 Location and aims of the project The biomass fired combined heat and power (CHP) plant is located in Lienz, Eastern Tyrol, Austria, in a newly built boiler house (see Figure 1), which was built in order to supply the town with district heat (about 60,000 MWh/a after completion of the network of pipes) and to produce electricity (about 7,200 MWh/a). It will cover the heat requirement of approximately 70 % of all buildings in the supply area by the end of 2003. The network of pipes covers three stages of development, with a final total length of 37.5 km and about 900 units connected. Figure 1: View of the CHP plant Lienz First of all the project aimed at the demonstration of the largest European biomass CHP plant based on an ORC process (Organic Rankine Cycle) with a nominal net capacity of 1,000 kWel, which went into full load operation in February 2002. This ORC process represents a further improvement and an up-scaling by a factor 2.5 of the already successfully demonstrated 400 kWel ORC unit in Admont, Austria. The mentioned up-scaling could not only be achieved by an obvious transformation of the 400 kWel ORC process design, the vapour and liquid volume flows as well as the surface areas of the heat exchangers of the 1,000 kWel machine made a new design concept necessary (see Figure 2). A second key innovation of the project was the first use of an internal heat recovering system, combining a thermal oil boiler with a thermal oil economiser and a combustion air pre-heater to increase the net electric efficiency of the ORC process to about 15 % (related to the NCV of the biomass fuel). An additional key innovation of the project was the Fuzzy Logic process control system in combination with an Artificial Neuronal Network for analysing, forecasting and optimising the performance of the overall CHP plant. This new process control technology was developed, designed and demonstrated for a biomass CHP plant for the first time in Europe. In order to decrease harmful emissions, an efficient, multi-stage flue gas cleaning system consisting of a multi-cyclone, an economiser and a wet electrostatic precipitator combined with a flue gas condensation unit was implemented within the overall CHP plant.PDF Image | FUZZY LOGIC CONTROLLED CHP PLANT FOR BIOMASS FUELS
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