how much energy does a human body use per day
That's easy. The energy requirement of an average man is 2,500 Calories per day, and one Calorie is 4184J. Therefore he emits about 10.5MJ/day or about 120W. An average woman requires 2,000 Calories per day, so she emits about 97W.he energy requirement of an average man is 2,500 Calories per day, and one Calorie is 4184J. Therefore he emits about 10.5MJ/day or about 120W. An average woman requires 2,000 Calories per day, so she emits about 97W.