
TABLE 8.2. Emergy Analysis of Solar Voltaic Power
Installation in Austin Texas. Annual
Contributions and Requirements (from
Environmental Accounting, Howard T. Odum, c1996) 
Note 
Item 
Data and Units (J, g or $) 
Solar Transformity (sej/unit) 
Solar Emergy (x10^15 sej/yr) 
Em$ ($/yr*) 
1 
Solar energy 
2.67 x 10^7 kWh 
1 
0.096 
60 
2 
Design installation 
1.94 x 10^4 $ 
2.8 x 10^12 
54.30 
27,160 
3 
Materials cost 
1.63 x 10^4 $ 
2.8 x 10^12 
45.60 
22,820 
4 
Collector cost 
5.68 x 10^4 $ 
2.8 x 10^12 
159.00 
79,520 
5 
Administrative cost 
1.2 x 10^5 $ 
2.8 x 10^12 
336.00 
168,000 
6 
Operation and maintenance 
4.0 x 10^4 $ 
2.8 x 10^12 
112.00 
56,000 
7 
Concrete 
2.23 x 10^3 lb 
1.5 x 10^13 
33.40 
16,725 
8 
Structural steel 
1.16 x 10^4 lb 
4.16 x 10^11 
4.80 
2,413 
9 
Steel building 
1.47 x 10^2 lb 
4.16 x 10^11 
0.06 
30 
10 
Rebar 
7.8 x 10^3 lb 
4.16 x 10^11 
3.24 
1,622 
11 
Copper wire 
26.7 lb 
4.49 x 10^13 
1.20 
600 
12 
Total from economy (items 211) 


749.70 
374,951 
13 
Electric power output 
1.8 x 10^12 J 
2.0 x 10^5 
360 
180,000 


Emergy yield ratio: 360 x 10^15
sej/yr / 749.7 x 10^15 sej/yr = 
0.48 


Emergy investment ratio: 749.7
x10^15 sej/yr / 0.096 x 10^15 sej/yr = 
7809 



* Solar Emergy in column 5 divided
by 1.6 x 10^12 sej/1991$. 


112 Based on an interview with the site engineer for the city of
Austin 


1
(2.67 x 10^7 kWh/yr)(3.6 x 10^6 J/kWh) = 9.61x10^13 J/yr 


13
(5.0x10^5 kWh/yr)(3.6 x 10^6 J/kWh) = 1.8 x 10^12 J/yr 


Source: R. King, personal
communications, 1991. Data from King
and Schmandt (1991). 



These calculations are based on our
present "shoptillyoudrop" theory of salvation. If we had adopted a fundamentally
different value system (e.g., Amish), then it is possible that PV could reproduce itself.
However, there is no reason to expect people to become more
"rational" during the coming energy crisis. Indeed, I expect people
to become even more irrational and violent.
See A MEANS OF CONTROL at http://dieoff.com/page185.htm 





