Latest revision as of 04:46, 6 September 2022

Cement takes 5 MJ/kg - [1]
A 200kW panel produces 4300 MJ per day. [2]
(1 kHwr = 3.6 MJ)
Solar array can produce 860 kG of cement per day. That is 43kg. 20 sacks of portland cement per day. That is $10 per bag - or $200/day
The value of electricity only is $120 - so that is value added electricity right there.
With 200kW at $100k installed - that is 500 days to payback time.
Molecular weight of lime - CaCO3 - 40+12+48 = 100. MW of lime - CaO - is 56% of the original. So about half gone. [3]

Conclusion

The open source microfactory with 200kW solar power yields about 20 sacks of cement per day starting from limestone. Cost of delivered gravel is $10/ton.
Cost per day in lime - $20. 10% costs of materials.

@@ Line 2: / Line 2: @@
 *A 200kW panel produces 4300 MJ per day. [https://www.google.com/search?q=1200+kwhr+to+MJ&oq=1200+kwhr+to+MJ&aqs=chrome..69i57j6.9492j0j7&client=ubuntu&sourceid=chrome&ie=UTF-8]
 *(1 kHwr = 3.6 MJ)
-*
+*Solar array can produce 860 kG of cement per day. That is 43kg. 20 sacks of portland cement per day. That is $10 per bag - or $200/day
+*The value of electricity only is $120 - so that is value added electricity right there.
+*With 200kW at $100k installed - that is 500 days to payback time.
+*Molecular weight of lime - CaCO3 - 40+12+48 = 100. MW of lime - CaO - is 56% of the original. So about half gone. [https://en.wikipedia.org/wiki/Lime_(material)]
+=Conclusion=
+*The open source microfactory with 200kW solar power yields about 20 sacks of cement per day starting from limestone. Cost of delivered gravel is $10/ton.
+*Cost per day in lime - $20. 10% costs of materials.
+[[Category: Solar Cement]]