Question

An office heater puts out 2070 btus (british thermal units) of energy in the form of heat per hour. given that 1 btu = 1.055 kj, how many megajoules of energy in the form of heat can be produced per year (365 days) by the heater (assume continuous operation)?

Answer 1

First, we calculate the kilojoules of energy per hour:
Energy per hour = 2070 x 1.055
Energy per hour = 2183.85 kJ / hr = 2.18385 MJ / hr

Hours in a year = 365 days per year x 24 hours per day
Hours in a year = 8760 hours

Energy output per year = 2.18385 x 8760
Energy output per year = 19,130 MJ per year