Activity Report 2005 - International Foundation High Altitude ...

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International Foundation HFSJG Activity Report 2005 Contacts: Christoph Wehrli Tel.: +41 81 417 5137 Fax: +41 81 417 5100 e-mail: christoph.wehrli@pmodwrc.ch URL: http://www.pmodwrc.ch 22
International Foundation HFSJG Activity Report 2005 Name of research institute or organization: Berner Fachhochschule, Hochschule für Technik und Informatik (HTI), Photovoltaik-Labor Title of project: Long-term energy yield and reliablity of a high alpine PV (photovoltaic) plant at Jungfraujoch (3454 m) Project leader and team Prof. Dr. Heinrich Häberlin, project leader Christof Geissbühler Project description: PV plant Jungfraujoch (1.152 kWp, 3454 meters above sea level) was planned and realised by HTI Burgdorf during summer and fall 1993. At the time of its erection it was (and perhaps it still is) the highest grid connected PV plant in the World. Purpose and Goals of the project: • Test of PV components: Operation in high altitudes is a very hard stress for all components due to extremely high irradiance peaks of more than 1.7 kW/m², heavy storms and thunderstorms, and large temperature differences. PV components surviving in such a harsh environment should perform more reliably under normal operating conditions. • Long-term operating experience: Experimental demonstration that high PV energy yields for high alpine PV plants that can be not only be simulated, but can actually be obtained in practical operation over many years. • Intensive analytical monitoring with redundant sensors to ensure maximum reliability in order to get long-term data about energy yield and reliability. • Maximum availability of energy production and monitoring data (AMD ≈ 100%). In 2005, the PV plant on Jungfraujoch (rated peak power 1.152kWp, effective peak power 1.13 kWp, 3454 m above sea level), has established a new all-time record for normalised annual energy production. Despite a line interruption of one day (23.8.2005) due to flooding in the valley, in 2005 1537 kWh/kWp were produced with a winter energy fraction of 48.5%. Thus the old record dating from 1997 (1504 kWh/kWp) was trespassed considerably. Without the line interruption, in 2005 the production would have been even 1540 kWh/kWp. This record production was due to the highest annual in-plane irradiation since 1994 and at the same time very low snow coverage of the two PV arrays over the whole year. In the average of 1993 to 2005, PV plant Jungfraujoch has produced 1407 kWh/kWp with a winter energy fraction of 46.3%. Y f (kWh/kWp/a) PR = Y f /Y r in % 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 Average 1994- 2005 1272 1404 1454 1504 1452 1330 1372 1325 1400 1467 1376 1537 1407 81.8 84.1 84.7 85.3 87.0 84.8 84.6 78.6 85.2 84.9 86.2 86.9 84.2 23
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