Homework Solution

TP 17-4

Given:

cord of hardwood cost $120

from table 17-5 of text:

• for wood: Cost($)/MBtu = (0.83)(Cost($))/cord
• for electricity: Cost($)/MBtu = (293)(Cost($))/kWh)

Find:

equivalent cost of wood energy in cents/kWh

Science:

units conversion

Solve:

for wood: Cost ($)/MBtu = ($0.083 cord/MBtu)($120/cord) = $9.96/MBtu

then:

$9.96/MBtu = (293 kWh/Mbtu)(Cost($))/kWh)

Cost($))/kWh = ($9.96/MBtu)/(293 kWh/Mbtu) = $0.034/kWh

Cost($))/kWh = 3.4 cents/kWh _ANS