Optimization of a Renewable Energy Supply System on a Remote Area: Berlenga Island Case Study

L. Amaral
Department of Economics, Management and Industrial Engineering; Research Unit on Governance, Competitiveness and Public Politics (GOOVCOP) University of Aveiro; Campus Universitário de Santiago, Portugal

N. Martins
Department of Mechanical Engineering; Centre for Mechanical Technology and Automation (TEMA); University of Aveiro; Campus Universitário de Santiago, Portugal

J. Gouveia
Department of Economics, Management and Industrial Engineering; Research Unit on Governance, Competitiveness and Public Politics (GOOVCOP); University of Aveiro; Campus Universitário de Santiago, Portugal

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110573484

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:62, s. 3484-3491

Visa mer +

Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


HOMER software was used to technical and economically assess two renewable energy supply (RES) system configurations – PV-only (80 kW) and PV (34 kW)/WT (36 kW); both with a three day storage capacity and requiring 11kW of electric power – proposed by a partnership project responsible for the implementation of sustainable measures on a Portuguese small island. HOMER calculation showed insufficient storage capacity for both RES system proposed; so extra storage capacity should be added. Economically; life cycle cost (NPC) of the cheaper configuration (PV/WT) resulting from HOMER calculation was significantly lower (20%) than the one advanced by the project. On a second stage; HOMER was used to compute an optimal RES system configuration to attend water desalination and street lighting electric additional loads. The optimal configuration – PV (25 kW)/WT (18kW) – costs 18% less than the equivalent PV/WT system proposed by the project when the same additional load is considered. Sensitivity analysis on the electric load showed the cost difference between project’s and HOMER’s proposals fading as the load increased. Variation on wind speed average demonstrated the significance of data accuracy: using NASA’s average wind speed data the NPC increased on 15% compared to using wind speed values revealed on a monitoring campaign on the island.


Remote off-grid energy systems; Optimization software; Sensitivity analysis


[1] Wolfe; P.; The implications of an increasingly decentralised energy system. Energy Policy; 2008. 36(12): p. 4509-4513. doi: 10.1016/j.enpol.2008.09.021.

[2] Hiremath; R.B.; S. Shikha; and N.H. Ravindranath; Decentralized energy planning; modeling and application - a review. Renewable & Sustainable Energy Reviews; 2007. 11(5): p. 729-752. doi: 10.1016/j.rser.2005.07.005.

[3] Association; R.E.; et al.; Sustainable Energy Manifesto. 2006.

[4] Antunes; C.H.; A.G. Martins; and I.S. Brito; A multiple objective mixed integer linear programming model for power generation expansion planning. Energy; 2004. 29(4): p. 613-627. doi: 10.1016/j.energy.2003.10.012.

[5] Iqbal; M.T.; A feasibility study of a zero energy home in Newfoundland. Renewable Energy; 2004. 29(2): p. 277-289. doi: 10.1016/S0960-1481(03)00192-7.

[6] Rehman; S.; et al.; Feasibility study of hybrid retrofits to an isolated off-grid diesel power plant. Renewable and Sustainable Energy Reviews; 2007. 11(4): p. 635-653. doi: 10.1016/j.rser.2005.05.003.

[7] Dalton; G.J.; D.A. Lockington; and T.E. Baldock; Feasibility analysis of stand-alone renewable energy supply options for a large hotel. Renewable Energy; 2008. 33(7): p. 1475-1490. doi: 10.1016/j.renene.2007.09.014.

[8] Portaria nº 270/90 de 10 de Abril; M.d.A.e.R. Naturais; Editor. 1990.

[9] Maciel; J.; Berlenga Sustainability Laboratory - A free-Carbon Energetic Solution. 2007.

[10] Estanislau; S. Berlenga – Sustainability Lab/Plans. in 2007 C3P & NASA Technical Workshop Partnership for Energy and Environmental Stewardship. 2007. Peniche.

[11] Fritz; W. and D. Kallis; Domestic Load profile measurtements and analysis across a disparate consumer base; in 18th International conference on the "Domestic Use of Energy". 2010.

[12] Correia; C.S.; Projecto “Berlenga – Laboratório de Sustentabilidade” Soluções de Abastecimento de Água e Saneamento; in Departamento de Ciências e Engenharia do Ambiente. 2008;: Lisboa.

[13] NASA. Surface meteorology and Solar Energy. A renewable energy resource web site (release 6.0) sponsored by NASA’s Earth Science Enterprise Program Available from: http://eosweb.larc.nasa.gov/sse/.

[14] Simões; T.; P. Costa; and A. Estanqueiro. Wind resource assessment in Berlengas Island. in European Wind Conference. 2007. Berlin; Germany.

[15] Proven Energy website. 2008; Available from: http://www.provenenergy.co.uk/our_products.php.

[16] Canada Wind Energy Association Website. 2008; Available from: http://www.smallwindenergy.ca/en/Overview/Costs/CostComparison.html.

[17] Suneffect website. 2009; Available from: http://www.suneffects.net/index_m.html.

[18] Partnership; P.R. Public Renewables Partnership website. Available from: http://www.repartners.org/solar/pvcost.htm.

[19] SolarBuzz. SolarBuzz website. 2010; Available from: http://www.solarbuzz.com.

Citeringar i Crossref