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# CONVERTING GALLON OF PROPANE TO VAPOROUS PROPANE

 SHORT ANSWER: A 100 gallon tank of liquid propane will supply a generator operating at 75% capacity and burning 1.5m3/hr. for about 2.8 days. Only 80% of the tank capacity is useable so the running time on one tank is limited to about 2.4 days or 57 hours or less. In some case altitude and temperature will modify these results, however in most cases this formula will work. Tank Size in Gallons   X   .81756  /  Fuel Consumption in m3/hr = generator running hours on this tank. LONG ANSWER: Using a standard conversion factor: 100 gallons of liquid propane converts to 378.5 liters of liquid propane Therefore 378.5 liters of liquid propane (x 270) will expand to 102195.0 liters when vaporized. 1.0 ml = 1.0 cm3 and 1,000,000 cm3 = 1 m3.  Therefore, 1,000,000 ml = 1 m3 also 1,000,000 ml = 1000 liters. Therefore, 1000 liters = 1 m3. Converting total liters to cubic meters 102195.0 liters / 1000 l/ m3 = 102.2 m3 vaporous propane = 100 gallons liquid propane originally. A ratio of 1:1 Finally, calculating the “run time".  for a 100 gallon tank with a generator running at 75% load consuming 1.5 m3/hr of propane. Restated in formula format. A 100 gallon tank (containing 102.2 m3 vaporous propane), burned at 1.5 m3/hr. (rated 75% capacity) = 68 hrs. or  2.8 days If you use the 80% rule then that converts to 80 % of 2.8 or 2.27 days or 54.48 hours. This can be restated in a formula as follows: FORMULA ANSWER:                                                                                                             Tank Size in Gallons   X   .81756  /   Fuel Consumption in m3/hr = generator running hours on this tank. ENGLISH LANGUAGE DESCRIPTION OF THE FORMULA: Take propane Tank Size (in Gallons) and multiply times .81756, this number is divided by Fuel Consumption (in cubic meters per hour) Equals hours of running time in hours for this tank.  If you require days, divide by 24. Examples: For a 100 gallon tank burned at a rate of 1.5 m3/hr, the estimated run time would equal 2.27 days For a 150 gallon tank burned at a rate of 1.5 m3/hr, the estimated run time would equal 3.41 days For a 200 gallon tank burned at a rate of 1.5 m3/hr, the estimated run time would equal 4.54 days For a 100 gallon tank burned at a rate of 1.1 m3/hr, the estimated run time would equal 3.10 days For a 100 gallon tank burned at a rate of 1.3 m3/hr, the estimated run time would equal 2.62 days For a 100 gallon tank burned at a rate of 1.9 m3/hr, the estimated run time would equal 1.79 days For a 200 gallon tank burned at a rate of 1.7 m3/hr, the estimated run time would equal 4.01 days

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