Environmental Engineering Reference
In-Depth Information
Ta b l e 4
Additional data from the TGER Energy Conversion Model
Feed materials (daily)-01 Aug 08
Garbage (gallons)
90 20% paper, 50% cardboard, 30% plastic
Garbage (lbs)
513
Food (gallons)
58
Diesel (gallons)
3
Energy content of feed
Heats of
comustion
(btu/lb) LHV
Tot a l
(lb)
Tot a l energy
(BTU)
Tot a l energy
(kWhr)
Component
2.9
Carbohydrates
7200
20871.65
6.11713
359.1
Paper/cardboard
8000
2872800
841.9695
77.0
Plastic-polyethylene terephthalate
10250
788737.5
231.1657
77.0
Pastic-polystyrene
17800
1369710
410.439
20.9
Diesel (DF2)
18397
385233.2
112.9054
Total
5437352
1593.597
Electrical energy production
Total (kWh)
267.5
Offboard (kWh)
221.2
Total thermal-to-electrical energy conversion efficiency (% of energy content of feed)
16.8%
Offboard energy conversion efficiency (% of thermal energy content of feed)
13.9%
Diesel fuel savings (gallons)
27
Energy delivery efficiency (% of electrical energy for offboard use)
82.7%
% Contribution to feed energy
Diesel
7.08%
Biofuels
92.92%
The residuals from waste conversion are environmentally benign including simple
ash, which can be added to improve soil for agriculture, and carbon dioxide.
The TGER will deploy on a XM 1048 5-ton trailer and is designed to sup-
port a 550 man Force Provider Unit (FPU), which produces approximately 2,200
pounds of waste daily. On a daily operational basis, this would conserve approx-
imately 100 gal of diesel. The capability for such conversion would provide
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