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Content Provider | The American Society of Mechanical Engineers (ASME) Digital Collection |
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Author | Kaikko, Juha Koskelainen, Lasse Jari, L. H. Backman Larjola, Jaakko |
Copyright Year | 2008 |
Abstract | Biofuels have a vital role in emerging distributed energy systems. Special interest is focused on heat engines that can utilize biomass by direct combustion, such as externally-fired microturbines (EFMT). This paper considers a case where a natural gas-fired microturbine is converted into an EFMT. In the application the combustion chamber is replaced by a metallic heat exchanger retrofitted into a large biomass-fueled hot water boiler. The hot air that leaves the microturbine is directed into the furnace as preheated combustion air. In the paper, techno-economical optimization is performed for the selected heat exchanger configuration. The optimization is based on maximizing the net present value of the investment. The optimum depends on the cost of the new components and the resulting effect on the overall plant performance. The results show that the energy prices have only a mild impact on the optimum dimensions, although the feasibility of the investment itself depends strongly on the economy parameters. Using the optimized heat exchanger, the performance of the EFMT is predicted under part-load conditions of the boiler. |
Sponsorship | International Gas Turbine Institute |
Starting Page | 817 |
Ending Page | 825 |
Page Count | 9 |
File Format | |
ISBN | 9780791843116 |
DOI | 10.1115/GT2008-51244 |
e-ISBN | 0791838242 |
Volume Number | Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Manufacturing, Materials and Metallurgy; Microturbines and Small Turbomachinery |
Conference Proceedings | ASME Turbo Expo 2008: Power for Land, Sea, and Air |
Language | English |
Publisher Date | 2008-06-09 |
Publisher Place | Berlin, Germany |
Access Restriction | Subscribed |
Subject Keyword | Economics Boilers Dimensions Combustion Biofuel Heat exchangers Biomass Distributed power generation Combined heat and power Optimization Hot water Stress Design Furnaces Heat engines Combustion chambers Microturbines |
Content Type | Text |
Resource Type | Article |
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