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Teknisk- naturvetenskaplig fakultet UTH-enheten Besöksadress: Ångströmlaboratoriet Lägerhyddsvägen 1 Hus 4, Plan 0 Postadress: Box 536 751 21 Uppsala Telefon: 018 – 471 30 03 Telefax: 018 – 471 30 00 Hemsida: http://www.teknat.uu.se/student Abstract Techno-Economic Analysis of Organic Rankine Cycles for a Boiler Station Jamel Hudson The Organic Rankine Cycle (ORC) may be the superior cycle for power generation using low temperature and low power heat sources due to the utilization of high molecular mass fluids with low boiling points. They are flexible, simple, easy to operate and maintain, and offer many possible areas of application including waste heat recovery, biomass power, geothermal power and solar power. Therefore, they may prove to be of significant importance in the reduction of global greenhouse gas emissions and the mitigation of climate change. In this thesis, the technical feasibility and economic profitability of implementing an ORC in a district heating boiler station is investigated. A model of the ORC connected to the hot water circuit of a biomass boiler is simulated. The achieved evaporation temperature is estimated to 135°C and the condensation temperature is found to vary in the range of 70-100°C. The results show that it is both possible and profitable to implement an ORC in the studied boiler station. A maximum net present value of 2.3 MSEK is achieved for a 400 kW system and a maximum internal rate of return of 8.5%, equivalent to a payback period of 9.5 years, is achieved for a 300 kW system. Furthermore, the investment is found to be most sensitive to changes in electricity price, net electric efficiency and capital expenditure cost. Handledare: Marcus Guldstrand Ämnesgranskare: Ali Al-Adili Examinator: Petra Jönsson ISSN: 1650-8300, UPTEC ES 19036PDF Image | Analysis of Organic Rankine Cycles for a Boiler Station
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