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Technoeconomic Assessment of a Solar/Biomass Hybrid Plant
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.ORCID iD: 0000-0002-3950-0809
KTH, School of Industrial Engineering and Management (ITM), Energy Technology, Heat and Power Technology.ORCID iD: 0000-0001-9923-4189
Florida State University. (Energy and Sustainability Center)
Florida State University. (Energy and Sustainability Center)
2012 (English)In: Proceedings of SEEP2012 conference, At DCU, Dublin, Ireland., Volume: 1, Dublin, 2012Conference paper (Refereed)
Abstract [en]

Solar and biomass are indigenous renewable resources that can be used for electricity production and that together represent an interesting and suitable combination. Solar energy can be converted to electricity using photovoltaic (PV) panels or concentrating solar power (CSP) systems. The feasibility of PV and CSP for a particular location depends on the cost, desired installed power capacity and direct solar insolation. Biomass on the other hand, can be first gasified and thereafter converted to electricity. The use of biomass together with a solar plant can help to improve significantly the availability of the plant as it can compensate for the intermittency of the solar energy resource while keeping its renewable profile and at the same time avoid the need to install costly energy storage solutions. Furthermore, biomass can help to reach better steam conditions in a CSP plant and thus improve the efficiency of the system. This paper analyzes from the technoeconomic viewpoint an innovative 5MWe hybrid power plant that provides cost effective electricity using medium temperature Concentrated Solar Power (CSP) and biomass gasification technologies. The plant consists of parabolic troughs that provide saturated steam at 250oC; biomass gasification technology using a downdraft gasifier design with variable feedstock utilization capability; an innovative two stage boiler to produce superheated steam at 440oC at 40 bar; an Organic Rankine Cycle system to extract energy from the waste heat of the steam cycle and a membrane distillation unit to produce purified water. The result of this study shows that feedwater preheating and heating of the water up to saturated liquid conditions could represent an interesting option for a wider utilization of solar energy worldwide. In terms of cost, although higher than other alternatives, the installation of hybrid solar/biomass plants could still be attractive and could represent an important alternative in certain locations.

Place, publisher, year, edition, pages
Dublin, 2012.
Keyword [en]
Solar, biomass, bioenergy, power plants
National Category
Energy Engineering
Research subject
Energy Technology
URN: urn:nbn:se:kth:diva-144053OAI: diva2:710469
5th International Conference on Sustainable Energy & Environmental Protection (SEEP 2012), Dublin City University, Dublin 5-8 June 2012

QC 20150211

Available from: 2014-04-07 Created: 2014-04-07 Last updated: 2015-02-11Bibliographically approved

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