Silicon: Difference between revisions
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*embodied energy of 1000 MJ/kg or 300 kWhr! [https://www.google.com/search?q=embodied+energy+of+solar+grade+silicon&oq=embodied+energy+of+solar+grade+silicon&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCTE0NzE0ajBqNKgCArACAQ&sourceid=chrome-mobile&ie=UTF-8] | *embodied energy of 1000 MJ/kg or 300 kWhr! [https://www.google.com/search?q=embodied+energy+of+solar+grade+silicon&oq=embodied+energy+of+solar+grade+silicon&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCTE0NzE0ajBqNKgCArACAQ&sourceid=chrome-mobile&ie=UTF-8] | ||
**Similar for amorphous silicon [https://www.google.com/search?q=what+is+the+embodied+energy+per+kilogram+of+amorphous+silicon&oq=what+is+the+embodied+energy+per+kilogram+of+amorphous+silicon&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCDg2MDlqMGo0qAIBsAIB&sourceid=chrome-mobile&ie=UTF-8] | |||
*Compare to steel at 20 MJ/kg [https://www.google.com/search?q=what+is+the+embodied+energy+of+steel&sca_esv=9360e7f17122653e&sxsrf=ADLYWILnZrV0U_M4TyJlSYlQDrEA_SXC-g%3A1733191918085&ei=7mhOZ7jfBKOYptQPs_3d0AQ&oq=what+is+the+embodied+energy+of+steel&gs_lp=EhNtb2JpbGUtZ3dzLXdpei1zZXJwGgIYAiIkd2hhdCBpcyB0aGUgZW1ib2RpZWQgZW5lcmd5IG9mIHN0ZWVsMgUQABiABDIFECEYoAEyBRAhGKABMgUQIRigATIFECEYoAEyBhAAGBYYHjILEAAYgAQYhgMYigUyCBAAGIAEGKIESMVQULMVWN9NcAJ4AZABApgBwQGgAdwbqgEEMjcuObgBA8gBAPgBAZgCDaAC_AeoAg_CAgoQABiwAxjWBBhHwgIHECMYJxjqAsICChAjGCcY6gIYiwPCAg8QIxiABBgnGIoFGEYY-QHCAgQQIxgnwgILEAAYgAQYkQIYigXCAgoQABiABBhDGIoFwgIREC4YgAQYsQMY0QMYgwEYxwHCAgoQABiABBgUGIcCwgILEAAYgAQYsQMYgwHCAggQABiABBixA8ICDhAAGIAEGLEDGIMBGIoFmAMRiAYBkAYIkgcEMTEuMqAH-Y8C&sclient=mobile-gws-wiz-serp], and 200MJ/kg more than this for aluminum [https://www.google.com/search?q=what+is+the+embodied+energy+of+aluminum&oq=what+is+the+embodied+energy+of+aluminum&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCDMwNzdqMGo0qAICsAIB&sourceid=chrome-mobile&ie=UTF-8] | *Compare to steel at 20 MJ/kg [https://www.google.com/search?q=what+is+the+embodied+energy+of+steel&sca_esv=9360e7f17122653e&sxsrf=ADLYWILnZrV0U_M4TyJlSYlQDrEA_SXC-g%3A1733191918085&ei=7mhOZ7jfBKOYptQPs_3d0AQ&oq=what+is+the+embodied+energy+of+steel&gs_lp=EhNtb2JpbGUtZ3dzLXdpei1zZXJwGgIYAiIkd2hhdCBpcyB0aGUgZW1ib2RpZWQgZW5lcmd5IG9mIHN0ZWVsMgUQABiABDIFECEYoAEyBRAhGKABMgUQIRigATIFECEYoAEyBhAAGBYYHjILEAAYgAQYhgMYigUyCBAAGIAEGKIESMVQULMVWN9NcAJ4AZABApgBwQGgAdwbqgEEMjcuObgBA8gBAPgBAZgCDaAC_AeoAg_CAgoQABiwAxjWBBhHwgIHECMYJxjqAsICChAjGCcY6gIYiwPCAg8QIxiABBgnGIoFGEYY-QHCAgQQIxgnwgILEAAYgAQYkQIYigXCAgoQABiABBhDGIoFwgIREC4YgAQYsQMY0QMYgwEYxwHCAgoQABiABBgUGIcCwgILEAAYgAQYsQMYgwHCAggQABiABBixA8ICDhAAGIAEGLEDGIMBGIoFmAMRiAYBkAYIkgcEMTEuMqAH-Y8C&sclient=mobile-gws-wiz-serp], and 200MJ/kg more than this for aluminum [https://www.google.com/search?q=what+is+the+embodied+energy+of+aluminum&oq=what+is+the+embodied+energy+of+aluminum&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCDMwNzdqMGo0qAICsAIB&sourceid=chrome-mobile&ie=UTF-8] | ||
*How many grams of silicon are needed for 1kW of PV panels? 2 kg [https://www.google.com/search?q=How+many+grams+of+silicon+are+contained+in+a+1+kilowatt+Photovoltaic+panel&oq=How+many+grams+of+silicon+are+contained+in+a+1+kilowatt+Photovoltaic+panel&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCTE1NzkyajBqN6gCD7ACAQ&sourceid=chrome-mobile&ie=UTF-8], based on 2g/W. | *How many grams of silicon are needed for 1kW of PV panels? 2 kg [https://www.google.com/search?q=How+many+grams+of+silicon+are+contained+in+a+1+kilowatt+Photovoltaic+panel&oq=How+many+grams+of+silicon+are+contained+in+a+1+kilowatt+Photovoltaic+panel&gs_lcrp=EgZjaHJvbWUyBggAEEUYOdIBCTE1NzkyajBqN6gCD7ACAQ&sourceid=chrome-mobile&ie=UTF-8], based on 2g/W. | ||
Revision as of 04:26, 3 December 2024
PV Panel Embodied Energy
- embodied energy of 1000 MJ/kg or 300 kWhr! [1]
- Similar for amorphous silicon [2]
- Compare to steel at 20 MJ/kg [3], and 200MJ/kg more than this for aluminum [4]
- How many grams of silicon are needed for 1kW of PV panels? 2 kg [5], based on 2g/W.
- 5% of weight of PV is silicon [6]. 76% is glass, 10% is aluminum, and 10% is EVA.
- Embodied energy of EVA is about 80 mega joules per kilogram [7]
Total for 1kW of PV
- 600 kWhr for 2 kg of silicon
- 3kWhr per kg for glass, or 90 kWhr for 30 kg glass. [8]
- About 40 kWhr per my of EVA/aluminum x 8 kg = 320 kwhr
- Total 1010 kWhr
- 365*6kWhr~2100 kWhr/yr
- Payback is thus 1/2 yr with only the above.
- This matches results from Fraunhofer 2021, close enough - .7-1.4 year payback time. [9]
Links
- DIY Glacial Acetic Acid
- Wikipedia says 585 kWhr/m2 of PV panels? [10]