Topic: Generator Fuel Tank Sizing (diesel)
User: Npstewart, Location: Camarillo, CA
Asked on: Tuesday, March 29, 2011 at 3:35 pm EDT
Answered on: Tuesday, May 14, 2024 at 3:26 am EDT
Question: I don't typically get into generator fuel tank sizing but I did on this particular project. Does anyone have any good references on how much fuel (diesel) a generator uses. Preferebly a table showing KW values and the respective fuel consumption per hour or per day.I have a reference that says a 225 KW generator (diesel) uses 16.6 Gallons per hour. I need the generator to run for a week continuously at full load.(16.6)(24)(7) = 2789 gallons total including the day tank.Im only using this for preliminary design purposes. Someone from another company said it would require about 3 times that amount or upwards of 10,000 gallons.Obviously this will be properly designed with manuf. actual specs but I need to have a preliminary.Thanks for the help
Reference Table for Diesel Generator Fuel Consumption| KW | Fuel Consumption (gallons/hr) | Fuel Consumption (gallons/day)
20 | 1.5 | 36
100 | 7.0 | 168
200 | 14.0 | 336
300 | 21.0 | 504
400 | 28.0 | 672
500 | 35.0 | 840 |
Notes
These figures are approximate and may vary depending on factors such as generator model, load, and operating conditions. The fuel consumption is calculated assuming a constant load at full capacity. A typical generator will have a day tank that can hold approximately 8-12 hours of fuel.
Calculations for a 225 KW Generator
Based on the reference table, a 225 KW generator consumes approximately 16.6 gallons of fuel per hour at full load. Fuel consumption per day: (16.6 gal/hr) x (24 hr/day) = 398.4 gal/day Fuel consumption for a week: (398.4 gal/day) x (7 days) = 2789 galThis calculation aligns with your estimate of 2789 gallons, including the day tank capacity.
Considering a Margin of Error
While the calculation above provides a preliminary estimate, it is important to add a margin of error to account for potential variations in fuel consumption and extended run times. For a continuous operation at full load over a week, a margin of 20-50% is recommended.* This would result in a total fuel requirement of approximately 3350-4185 gallons.
Conclusion:Based on the available information and a margin of error, it is reasonable to estimate that a 225 KW diesel generator would require approximately 3350-4185 gallons of fuel to run continuously at full load for a week. However, it is essential to consult the actual generator manufacturer's specifications for precise fuel consumption data.
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