Evaluation of energy payback and CO2 emission of solar home systems in Bangladesh

摘要

Around 1.4 million solar home systems are already installed by February 2013 in Bangladesh. In this paper, the energy and emission of solar home systems installed in Bangladesh are analyzed based on the field visit at the six different districts in Bangladesh. Study has been conducted for 40~85 W_p systems as these systems are mostly used in the rural user level. Total primary energy requirement including energy requirement for manufacturing and energy required to replace its components in the estimated project life 20 years are calculated. On the other hand, energy supply by a SHS in its entire life time is also evaluated based on monitoring of selected SHSs. Energy payback period for 40, 50, 65, 75 and 85 systems are found to be 6.94, 7.47, 7.80, 7.32 and 6.91 years respectively. It is also revealed from the study that 1.4 million solar home systems in Bangladesh can mitigate 0.8 million ton of CO2 per year.