Biomass and central receiver system (CRS) hybridization: Volumetric air CRS and integration of a biomass waste direct burning boiler on steam cycle |
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| Authors: | Bruno Coelho Peter Schwarzbözl Armando Oliveira Adélio Mendes |
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| Affiliation: | 1. NET – New Energy Technologies Research Unit, IdMEC – Institute of Mechanical Engineering, Faculty of Engineering, University of Porto, Rua Roberto Frias, 4200-465 Porto, Portugal;2. German Aerospace Centre (DLR), Solar Research, Linder Höhe, 51147 Köln, Germany;3. Laboratory for Process, Environmental and Energy Engineering (LEPAE), Faculty of Engineering, University of Porto, Rua Roberto Frias, 4200-465 Porto, Portugal;1. School of Mining, Energy and Materials Engineering of Oviedo (EIMEM), University of Oviedo, C/ Independencia 13, 33004, Spain;2. School of Industrial Engineering, University of Vigo, Lagoas, Marcosende, 36310E, Spain;3. Defense University Center, Spanish Naval Academy, Plaza de España s/n, 36900 Marín, Spain;4. Polytechnic Institute of Viana do Castelo, School of Technology and Management, Av. Atlântico, 4900-348 Viana do Castelo, Portugal;1. CIRAD, Biomass for Energy Research Group, 73 Avenue Jean-François Breton, F-34398 Montpellier Cedex 5, France;2. CATIE, Climate Change and Watersheds Programme, 2-7170, Turrialba 30501, Costa Rica;3. CIRAD, GREEN Research Unit, F-34398 Montpellier, France;1. University of Oviedo, School of Mining, Energy and Materials Engineering of Oviedo, Department of Energy, Calle Independencia, 13, Oviedo, Principado de Asturias, Spain;2. TENECO Research Group, Department of Mechanical Engineering, University of La Rioja, Calle San José de Calasanz, 31, Logroño, La Rioja, Spain |
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| Abstract: | Concentrated solar power (CSP) plants generate an almost continuous flow of fully dispatchable “renewable” electricity and can replace the present fossil fuel power plants for base load electricity generation. Nevertheless, actual CSP plants have moderate electricity costs, in most cases quite low capacity factors and transient problems due to high inertia. Hybridization can help solve these problems and, if done with the integration of forest waste biomass, the “renewable” goal can be maintained, with positive impact on forest fire reduction. Local conditions, resources and feed in tariffs have great impact on the economical and technical evaluation of hybrid solutions; one of the premium European locations for this type of power plants is the Portuguese Algarve region.Due to the concept innovation level, conservative approaches were considered to be the best solutions. In this perspective, for a lower capital investment 4 MWe power plant scale, the best technical/economical solution is the hybrid CRS/biomass power plant HVIB3S4s with CS3 control strategy. It results in a levelized electricity cost (LEC) of 0.146 €/kWh, with higher efficiency and capacity factor than a conventional 4 MWe CRS. A larger 10 MWe hybrid power plant HVIB3S10s could generate electricity with positive economical indicators (LEC of 0.108 €/kWh and IRR of 11.0%), with twice the annual efficiency (feedstock to electricity) and lower costs than a conventional 4 MWe CRS. It would also lead to a 17% reduction in biomass consumption (approximately 12,000 tons less per year) when compared with a typical 10 MWe biomass power plant – FRB10; this would be significant in the case of continuous biomass price increase. |
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