General information Location: Petten, the Netherlands Sunshine hours (yearly average): 1 477 hours per year, 4,05 hours per day Type of project: PV-lamella system, canopy roof and curved roof integration Type of application: Retrofit Time for design process: 1 year Time for construction: 2 years Realization: December 1999 (façade) and December 2000 (roof) [ Top ] Description The Netherlands Energy Research Foundation ECN is the leading institute for energy research in the Netherlands. ECN is attractively situated in the dunes of North Holland just north of the village of Petten. Research at ECN is carried out under contract from the government and from national and foreign organizations and industries. ECN's activities are concentrated in seven priority areas: solar energy, wind energy, biomass, clean fossil, energy efficiency, policy studies, and renewable energy in the built environment. As ECN aims to strengthen, the synergy between market and sustainability as a technology developer, the decision was made to demonstrate with their own buildings, how they can be ecologically transformed. The ‘General Laboratory of the Netherlands Energy Research Foundation ECN’, as well named ‘building 31’ was built in 1963 as a laboratory building and has a total floor area of 3,530 m2. When the plans to renovate the building rose, most of the rooms of building 31 were in use as offices. The brief for the project was to refurbish the laboratorium building (built in 1948) into a sustainable building with laboratories on the north side and offices on the south side. The refurbishment also has to solve all known incapabilities of the building and the physical and climate problems in the building. [ Top ] System characteristics PV system power: Façade and roof total: 71,88 kWp 26,21 kWp PV-lamella system south façade 6,91 kWp PV-canopy above PV-lamella façade 38,76 kWp PV-roof integration Type of building integration: PV-lamella shading system for the façade, PV-canopy roof above facade and Roof integration Type of cell technology: multi crystalline cells for lamella façade and multi crystalline cells for canopy roof mono crystalline solar for roof-integration Module dimensions: PV-lamellas: 478x1006 mm Shell Solar type RSM 50 with 48Wp Canopy roof: 550x1100 mm custom made Shell Solar IRD 50 with 44,3 Wp Roof-integration: 525x1183 mm type BP-585-L with 85Wp PV-module construction Standard framed PV-laminates produced by Shell Solar have been used for PV-lamella system Custom made framed glass-glass PV-modules produced by Shell Solar for the canopy roof Frameless standard PV-laminates made by BP-Solar for the roof-integration Inverters: Lamella system and canopy roof: 13 string inverters ‘Sunmaster 2500-150’ with 2500 Watt capacity Roof integration: 19 string inverters SMA sunny Boy 2400 Other elements: a special metal substructure has been developed for the shading lamella system by ALCO together with Dasolas. the canopy roof profiles have been manufactured by Allicon. the curved roof-integration was made with BP Sunflower system [ Top ] Project cost breakdown PV-system for shading lamellas south facade: € 181 512 for 26,21 kWp turnkey PV-system with standard modules by Shell Solar (costs include PV-system installation by Shell in pre-installed metal shading lamellas by ALCO, PV-engineering, inverters, electric installation and components) 2. PV-modules canopy roof: € 79 865 for 6,91 kWp glass-glass PV-modules canopy roof by Shell Solar (price only for PV-modules, without mounting and electric components) PV-roof integration curved roof: € 237 972 for 38,76 kWp turnkey delivery of installed PV-system by BP Solar (with Sunflower profiles including engineering, inverters, mounting and all components) [ Top ] Performance characteristics The PV-systems started operation in spring 2000 (façade) and spring 2001 (roof), so evaluated data will be available in a later stage. Measurements are permanently performed on the system by the ‘wind and sun’ unit of ECN with scientific ambitions: especially for the ECN 31 PV-plants single cells foreseen for the production of the PV-modules have been exactly calibrated before they have been built in the modules. This allows to exactly calculate the PV-system efficiency. [ Top ] Project team Client: Netherlands Energy Research Foundation (ECN) Westerduinweg 3, Petten, The Netherlands Tel.: +31-224-564949 Fax: +31-224-564480 E-mail: info@ecn.nl Internet: www.ecn.nl Architect: BEAR Architecten BV Gravin Beatrixstraat 34 NL-2805 PJ Gouda, Netherlands Tel.: +31-182-529899 E-mail: office@bear.nl for PV-lamella system in collaboration with: Officine di Architettura Architects Cinzia Abbate and Carlo Vigevano Piazza S. Anastasia 3 00186 Rome, Italy Tel.: +39 066796498 E-mail: cinzia.abbate@flashnet.it Engineers: Van Heugten Nijmegen Contractor: VBK Hoorn PV Manufacturers: Shell Solar, BP Solar [ Top ]