2 Fluidized Bed Coffee Roasters, one Electric and one Gas/Electric Cost and CO2 Impact Comparison

 Maximum Batch

Power Consumed

Kilowatt Hours  Batch

 CO2 per Batch

Seattle Price Per KW Hr = 6.3 Cents Electric Costs per Roast

Thermal Convection  Drum Roaster

Fluidized Bed Roaster

2 lb.

1450 Watts

.725 KWhr.*

.323 Kg. per 2 lb. Batch

4.57  Cents per Batch    2.28  Cents per Pound

4 lb.

1750 Watts

.875 KWhr.*

.376 Kg. per 4 lb. Batch

5.51 Cents  per Batch    1.4  Cents per  Pound

6 lb.

1900 Watts

.950 KWhr.*

.409 Kg. per 6 lb. Batch

5.99 Cents  per Batch     1.0 Cents     per Pound

8 lb.

3250 Watts

1.63 KWhr.*

.699 Kg. per 8 lb. Batch

10.27 Cents per Batch    1.3 Cents per Pound

4 oz.

1500 Watts

.750 KWhr.

.323 Kg. per 4 oz. Batch

1.29 Kg./lb.

4.73 Cents   per Batch     18.92 Cents per Pound

1.3 lb. Batch/    3.9 lb. hr.

31000 Btu/Hr Liquid Propane (LP)**

1.47 lb. LP** per Hour

1.83 Kg./Hr.

.61 Kg./Batch

$1.03 per Hour 26 Cents per Pound (@ 0.70 Cents /lb. LP)

**Not included in the power cost of the 1.3 lb. Batch Size LP Fluidized Bed Coffee Roaster is the Electric Power Required, which is Nominal at 360 Watts or 3 Ampere Hours per Hour of Operation