 |
The energy recovery period is an important energy consumption index of the photovoltaic industry technology, that is, the time required for the photovoltaic battery system to generate electrical energy over the total electrical energy consumed to produce the battery system. The shorter the energy recovery period, the higher the social/economic benefits.
Currently, many versions of the PV energy recovery period and carbon emission calculation data do not include the energy consumption from silicon sand (SiO2) to metallurgical silicon, but are calculated from the metallurgical silicon material to the photovoltaic system, including research reports prepared by Li Junfeng. . I guess it is because Silica Sand is a raw material of Guangpu Industrial, such as: semiconductors, chemicals, construction, etc. The photovoltaic industry chain starts to calculate from silicon materials. A handful of people have been using this to attack the photovoltaic energy consumption. I recalculated the energy consumption and carbon emissions of the entire industry chain from silicon sand to photovoltaic systems, and exhausted all the related auxiliary materials, packaging materials (tempered glass, EVA, TPT, etc.) and photovoltaic power station system supporting equipment (grid-connected inverters). Power consumption of cables, switches, brackets, meters, etc.
After calculation, the recovery period for polysilicon batteries (silica sand-photovoltaic power plant system) is 1.59 years, and the energy recovery period for thin-film batteries is 0.87 years. Detailed calculations are shown in the table below. The domestic production of solar modules has a service life of 25 years. Based on this calculation, the solar modules produced can produce electricity for almost 23 years without generating any energy after they have recovered their energy consumption. In fact, even after 25 years, the solar module's power generation efficiency is roughly equivalent to the previous 70%-80%, and it can still be used for a long time. From the point of view of the final photovoltaic products, energy recovery can be realized in a short time, and then a steady stream of green energy can be output.
Personal capacity is limited. Everyone is welcome to check, supplement and improve. In order to facilitate review and verification, I also announced the Excel version of the calculation template (the formula has been set) for everyone to calculate: http://vdisk.weibo.com/s/8Lp-m. (The author and the new energy of the sea Weibo)
Granular Activated Carbon,Bulk Activated Carbon,Commercial Activated Carbon
Filter Media,Activated Carbon Co., Ltd. , http://www.shactivatedcarbon.com