Evaluation of improvements in end-conversion efficiency for bioenergy production

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Evaluation of improvements in end-conversion efficiency for bioenergy production ( evaluation-improvements-end-conversion-efficiency-bioenergy- )

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60 Most common fuels are vegetable oils (amongst them palm oil is most common) and used fats. A Jatropha oil fuelled CHP plant is under construction (Greenpower, Merkseplan, 9 MWe). Specific investment costs are given in Figure 13. Operational cost, including flue gas cleaning, range from • 0.005 – 0.02 €/kWh. Figure 13: Specific investment cost for a vegetable oil engine, including CHP-module, lubricant oil supply and return system, electric control cabinet, ventilation system, transport, installation and commissioning [26] 2.9.3 Efficiency and improvement opportunities Typical efficiencies of Diesel engines were given in Table 19. At lower capacities (roughly <1 MWe) efficiencies increase significantly with scale, while at higher capacities, the efficiency increases only moderately with scale. A Diesel engine is common technology. Improvement of the technology is therefore limited. However, the application of vegetable oils and fats raises some operational problems. Since continuity is of major importance, these issues should be controlled carefully. The fuel feeding system is in this the most important. To control viscosity, fuel temperature control is crucial. 2.10 Summary of technologies and general recommendations In the previous paragraphs, major biomass technologies were discussed. The most important data is summarized in Table 21. Estimates on current capacity and potential based on efficiency improvements are added as additional information. Assumptions in these estimations are given in footnotes below the table. EVALUATION OF IMPROVEMENTS IN END-CONVERSION EFFICIENCY FOR BIOENERGY PRODUCTION

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