Equipment | Typical load factorz | Average C emission (g/hp/hr)y | Total C emission (kg/hr)x |
---|---|---|---|
Aerial lift | 0.505 | 147.2 | 3.2w |
Backhoe | 0.465 | 147.3 | 5.3v |
Chain saw < 4 hp | 0.500 | 1,264.4 | 1.5u |
Chain saw > 4 hp | 0.500 | 847.5 | 3.2t |
Chipper/stump grinder | 0.370 | 146.4 | 5.4s |
↵z Average value from two inventories (conservative load factor of 0.5 from one inventory was used for chain saws > 4 hp due to disparate inventory estimates; inventory average for this chain saw type was 0.71)
↵y Calculated from estimates of carbon monoxide (U.S. EPA 1991), hydrocarbon crankcase and exhaust (U.S. EPA 1991), and carbon dioxide emissions (Charmley, pers. comm. 1995) adjusted for in-use effects. Total carbon emissions were calculated based on the proportion of carbon of the total atomic weight of the chemical emission. Multiply by 0.0022 to convert to lb/hp/hr.
↵x Multiply by 2.2 to convert to lb/hr.
↵w Mean HP = 43 (U.S. EPA 1991).
↵v Mean HP = 77 (U.S. EPA 1991).
↵u HP = 2.3.
↵t HP = 7.5.
↵s Mean HP = 99 (U.S. EPA 1991).