1 calorie=1000 calories=1000 calories=4186J=4.186kJ, 10,000 calories per hour=11.63kw, 1 kilowatt-hour = 860 calories, 1 ton of steam=600,000 calories, 1 cubic natural gas=8400 calories Calorie heat, 1 kilogram of coal = 7000 calories, 1 cubic of air needs 0.04kw to heat up 100 degrees, and 1 cubic of nitrogen needs 0.06kw to heat up 100 degrees.