How To Calculate Fuel Consumption Of Marine Diesel Engine?

It’s crucial to remember that depending on how fast you’re driving and other factors, your fuel consumption may reduce or increase. A gasoline meter put on your boat is the only true way to measure fuel use. However, while calculating your fuel use isn’t always perfect, it’s a wonderful place to start! On the sea, miles are difficult to measure, hence Gallons Per Hour (GPH) is utilized instead of the conventional MPH.

Pen and Paper Method

“…put in its horsepower rating and multiply it by the specific fuel consumption average, then divide the product by the fuel specific weight,” says the author. *

How is diesel engine fuel consumption calculated?

The following formula is used to hypothetically evaluate automotive fuel consumption QS at normal movement (in l(100 km)-1). QS = ge Pe / 36 f V, (1) where ge denotes the specific fuel consumption of a free-piston engine in estimated movement mode, g(kW*h)-1, and Pe is the power absorbed from the crankshaft of the engine.

How is marine engine fuel consumption calculated?

The mass of fuel required per unit time to create one KW is known as specific fuel oil consumption. The SFOC is commonly used to measure the efficiency of marine engines.

Fuel consumption and power developed are always measured over a reasonable time period in favorable weather in order to attain precision. The following is the formula for calculating SFOC:

  • The flow meter readings to the main engine should be recorded for a set time interval, such as one hour. The volume of fuel utilized is calculated using the difference in readings. If the oil is just being delivered to the main engine, it can also be measured by jotting down the HFO service tank reading.
  • Following the above-mentioned bunker calculation process, the mass of the observed volume of fuel consumed can be computed.
  • If a dynamometer is installed on the engine shaft, the horsepower can be measured using a digital indication that displays the BHP. If not, the horsepower can be computed using engine rpm and average pump fuel index with the help of the manufacturer’s engine characteristic curve from numerous sea trials. However, the calorific value of the fuel utilized for the sea trial may differ, necessitating the determination of a compensating factor to ensure accuracy in calculation.

How do you calculate the fuel consumption of a diesel engine per km?

It is not difficult to calculate a vehicle’s fuel usage. Simply record the distance traveled since the last fill-up and the amount of fuel spent to cover that distance, then divide the litres consumed by the kilometres traveled and multiply by 100 to determine consumption in litres per 100 kilometers.

For example, if your vehicle used 60 litres of fuel to travel 450 kilometers, divide 60 by 450 and multiply by 100 for a rounded fuel consumption number of 13.3 litres per 100 kilometers.

With a fuel consumption figure, you can now determine your vehicle’s touring range by dividing the vehicle’s fuel tank capacity by the fuel consumption and multiplying by 100 once more.

How is marine engine output calculated?

Work done in a single cycle = Mean Indicated Pressure x Piston Area x Stroke Length =xx To calculate the power of this unit, multiply the work rate by the number of power strokes performed in one second.

How much fuel does a diesel engine burn per hour?

With a boat, it’s a different story. Because the time it takes to cover a distance fluctuates more than it does on the road, fuel consumption is calculated in gallons per hour. While many engines include fuel flow readouts, it’s also crucial to be able to estimate fuel use while purchasing for a boat or engine. Fuel efficiency is measured in pounds of fuel consumed per horsepower developed per hour. It’s known as “brake-specific fuel consumption” by the pros. This makes it crucial to understand that gasoline weighs around 6.1 pounds per gallon and diesel fuel weighs approximately 7.2 pounds per gallon.

For each unit of horsepower, an in-tune four-stroke gasoline engine will burn roughly 0.50 pounds of fuel per hour. Similarly, each unit of horsepower produced by a well-maintained diesel engine consumes around 0.4 pounds of gasoline per hour. These values do not account for boat drag, sea conditions, or efficiency losses due to transmissions and bearings. However, when it comes to shopping, they provide an outstanding relative difference between engines.

Are you perplexed yet? Take a look at the mathematical examples below to see how a boat’s fuel economy can be calculated.

How do you calculate fuel consumption per kWh?

In 2020, the average quantity of coal, natural gas, and petroleum liquid fuels required to create a kilowatthour (kWh) of electricity in the United States was1

In 2020, the average number of kWh created per unit of coal, natural gas, and petroleum liquid fuels consumed by the United States’ electric power industry was1

The figures above are based on annual data collected at the national level. Actual numbers for a particular generator or power plant may differ significantly from those listed above. The amount of fuel consumed to create electricity is determined by the generator’s efficiency (or heat rate) and the heat content of the fuel. The types of generators (primary movers), the type and heat content of fuels, power plant emission controls, and other factors all affect power plant efficiencies (heat rates).

The amount of fuel consumed to generate a kilowatthour (kWh) of electricity can be calculated using two formulas:

  • Heat rate (in British Thermal Units (Btu) per kWh) divided by Fuel heat content = Amount of fuel used per kWh (in Btu per physical unit)
  • Fuel heat content (in Btu per physical unit) divided by Heat rate = Kilowatthour created per unit of fuel used (in Btu per kWh)

The following are some of the data sources available from the US Energy Information Administration (EIA) for those calculations:

  • The average quality of fossil fuel receipts for the electric power industry is shown in Table 7.3. ( xls )

Appendices providing fuel heat contents, electricity heat rates, and conversion factors are included in the Monthly Energy Review.

On a national and state level, as well as at individual power plants, the EIA releases monthly and annual data on the amount of electricity generated and associated fuel consumption by electricity producers. This information can also be used to determine fuel use per kWh of electricity generated, as well as kWh generation per unit of fuel consumption.

  • Data on total power generation in the United States (Table(s) 7.2) and electricity generation fuel consumption (Table(s) 7.3).
  • Historical power data files at the state level, including annual and monthly electricity generation and fuel usage.
  • Data on fuel consumption and electricity generation at individual power plants in the United States, broken down by fuel/energy source.

1 In combined heat and power plants, fuel is not used for usable thermal output.

Other FAQs about Oil/Petroleum

  • Is there information from the EIA on the rail movement (transport) of crude oil, petroleum products, gasoline ethanol, and biodiesel?
  • Does the EIA provide state-by-state estimates or projections for energy output, consumption, and prices?
  • Is the EIA aware of any unplanned disruptions or shutdowns of energy infrastructure in the United States?
  • A kilowatthour of electricity is generated using how much coal, natural gas, or petroleum?
  • What percentage of the crude oil produced in the United States is used in the country?

How do you calculate fuel consumption per liter?

You won’t be able to tell if your new driving style and skills are effective unless you know your car’s average miles per gallon (mpg). On-board computers are available in some vehicles, however they are not always reliable.

  • Subtract the number of miles travelled from the litres of gasoline consumed (miles per litre)


Stages one and two are completed by Frank. When he next fills up, his trip meter reads 160.1 miles. Filling his tank takes 22.3 litres. Frank calculates his gasoline consumption to be:

How do you calculate diesel per km?

You may evaluate and compare monthly operating costs with our gasoline cost calculator. You can compare the daily, monthly, and annual fuel costs of one petrol, diesel, or CNG vehicle with those of another vehicle that uses a different fuel type. You only need to enter the cost of gasoline, diesel, or CNG per unit or per litre, as well as the expected mileage from the car.

Based on the selected city, the most recent gasoline price will be displayed automatically. You can also alter the city to see the most up-to-date gasoline, diesel, and CNG prices in your area. You can manually enter higher or lower fuel rates when calculating your car’s daily, monthly, or annual fuel costs. This will assist you in estimating the cost of operating your gasoline, diesel, or CNG car if fuel costs rise due to inflation or increasing crude oil prices.