Life-cycle analyses of very-large scale PV systems using six types of PV modules

摘要

The authors have been studied the life-cycle analysis of the VLS-PV systems installed in desert area using sc-Si, mc-Si, a-Si/sc-Si, a-Si/mu c-Si, CdTe, and CIS PV modules The sc-Si and a-Si/sc-Si, a-Si/mu c-Si are new items from the last studies [1] It is assumed 1 GW system in Gobi desert including transmission lines We estimated energy requirement, energy pay-back time. CO2 emissions, and CO2 emissions rate Concerning the energy requirement, the CIS is the smallest, and biggest energy requirement is the sc-Si The mc-Si, a-Si/sc-Si. thin-film Si and CdTe ale average The energy pay-back time of the CIS's VLS-PV system is approximately 18 years, and sc-Si is 2 5 years The others are approximately 20-23 years. Characteristics of the CO2 emissions rate are almost same as energy pay-back time. The CO2 emission rate is 43-54 g-O-2/kW h The mc-Si, a-Si/sc-Si, and CIS shows lower CO2 emissions rate.