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Biofuel-burning Microturbine Fig. 16: Liquid biofuelled microturbine electricity generation costs O&M costs The operation and maintenance costs are variable costs, and microturbine manufacturers calculate between 0,015 and 0,005 Euro per kWhe. Electricity generation costs An economic analysis has been performed for 30 kW and 100 kW microturbines in continuous generation for electricity-only and CHP application. The microturbine was assumed to run on bio-ethanol, produced from lignocelluloses at 0,20 Euro per litre, a value that is expected for ethanol production in the near future. Based on investment and O&M costs for actual microturbines, electricity generation costs of 14,7 - 18,5 ct/kW (electricity-only) and 9,7 - 14,4 ct/kWh (CHP) have been calculated (see Figure 16). Both figures are higher than current industrial consumer prices, that base on large-scale electricity generation facilities. In the current initial market phase subsidies for green generation, such as guaranteed feed-in tariffs (German Renewable Energy Sources Act (EEG), help to make liquid biofuelled microturbines economically feasible. Economic competitiveness of liquid biofuelled microturbines can be achieved by overcoming initial experience problems, by reducing of investment and engineering costs, by increasing of efficiency and by scaling-up of biofuel production and biofuel infrastructure. All these issues are under development and promise to make liquid biofuelled microturbines competitive in the medium term. New models, announced for 2005 show considerable efficiency improvements to prospected 34%. Microturbine manufacturers are t a r g et i ng a f u t ur e i nv e st me n t c os t be l ow 6 50 Euro/kW. Today, microturbines running on various gases are already economically efficient in Europe, the USA and Asia. These applications include distributed generation with the use of essentially free fuels (e.g. at oil platforms, landfills and sewage plants), as well as co- and trigeneration applications. Green electricity generation, intending to reduce environmental emissions and impacts, is an application that shows best opportunities for microturbines. For green electricity application microturbines offer significant advantages with respect to the existing distributed generation technologies capable of using liquid biofuels, such as reciprocating engines, Stirling engines and fuel cells. Microturbines have considerably lower emission levels than the cheaper reciprocating engines, whereas the substantially higher investment and O&M costs for fuel cell technology, today exclude fuel cells from high volume utilisation. Thus, biofuelled microturbines offer, among all biofuelled distributed generation technologies, the best cost-performance ratio in the field of green electricity generation. - 14 -PDF Image | Biofuel-burning Microturbine Opportunities for Biofuel-burning Microturbines in the European Decentralised-generation Market (BIOTURBINE)
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