TITLE

RENEWABILITY AND LIFE CYCLE ENERGY EFFICIENCY OF PHOTOVOLTAIC SYSTEMS: ASSESSING THE IMPLICATION OF SOLAR RADIATION AND CONVERSION EFFICIENCY ON ENERGY DISPLACED

AUTHOR(S)
Djomo, Sylvestre Njakou; Blumberga, Dagnija
PUB. DATE
December 2007
SOURCE
Power & Electrical Engineering;2007, Issue 21, p200
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Photovoltaic systems are expected to play an increasingly important role in the renewable energy market, as many countries search for ways to reduce fossil fuels depletion and emissions of greenhouse gas. In order to analyze the energy and environmental profile of photovoltaic systems, it is necessary to expand the system boundaries, taking into account also "hidden impacts" related to production, transportation and disposal of the system at the end of its technical life. This paper uses life cycle methodology to derive a complete and extended energy and environmental profile of a conceptual grid-connected photovoltaic system in Latvia. The photovoltaic is manufactured as panels from amorphous silicon (a-Si), laminated directly onto standard galvanized aluminum standing seam roofing panels providing approximately 120 m2 of surface area. The process data include quartz reduction, silicon purification, and wafer and panel production, panel installation, dismantling and disposal. The operational life time of the investigated photovoltaic system is assumed to be 30 years. The results show that the energy payback ratio of the studied system is 7.2 and the life cycle energy consumption and greenhouse gas emissions are 485 kJ/kWhel and 30 g CO2-equ./ kWhel respectively.
ACCESSION #
38416187

 

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