| Energy consumption per year
Cucumbers 16,000 GJ/ha or 6,500 GJ/acre
Tomatoes 19,000 GJ/ha or 7,695 GJ/acre
Peppers 15,000 GJ/ha or 6,075 GJ/acre
Perennials 14,700 GJ/ha or 5,950 GJ/acre
Energy contents of different fuels
Natural Gas 38.16 MJ/m3 or 10.60 kWh/m3
Coal 31.10 MJ/kg or 8.64 kWh/kg
Wood Waste 14.46 MJ/kg or 3.72 kWh/kg—25% more moisture
Bunker Oil 40.06 MJ/kg or 11.13 kWh/kg
Wood Pellets 18.84 MJ/kg or 5.23 kWh/kg
Projections for a 20,000 m2 or 5 acre tomato operation @ 1.90 GJ/m2 or 0.17 GJ/ft2
On Natural Gas 37,900 GJ or 1,196,172 m3
On Coal 42,353 GJ or 1,361,831 kg
On Wood 42,353 GJ or 2,680,566 kg |