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Indicated specific fuel consumption Formula

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Indicated Specific Fuel Consumption is the fuel consumption per unit time per unit indicated power. Check FAQs

ISFC = \frac{ṁ f}{IP}

ISFC - Indicated Specific Fuel Consumption?ṁ_f - Fuel Consumption in IC engine?IP - Indicated Power?

Indicated specific fuel consumption Example

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With units

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Here is how the Indicated specific fuel consumption equation looks like with Values.

Here is how the Indicated specific fuel consumption equation looks like with Units.

Here is how the Indicated specific fuel consumption equation looks like.

0.0036 = \frac{0.0009}{0.9}

0.0036kg/h/W = \frac{0.0009kg/s}{0.9kW}

0.0036 = \frac{0.0009}{0.9}

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Indicated specific fuel consumption Solution

Follow our step by step solution on how to calculate Indicated specific fuel consumption?

FIRST Step Consider the formula

ISFC = \frac{ṁ f}{IP}

Next Step Substitute values of Variables

∴

ISFC = \frac{0.0009kg/s}{0.9kW}

Next Step Convert Units

∴

ISFC = \frac{0.0009kg/s}{900W}

Next Step Prepare to Evaluate

∴

ISFC = \frac{0.0009}{900}

Next Step Evaluate

∴

ISFC = 1E-06kg/s/W

LAST Step Convert to Output's Unit

∴

ISFC = 0.0036kg/h/W

Indicated specific fuel consumption Formula Elements

Variables

Indicated Specific Fuel Consumption

Indicated Specific Fuel Consumption is the fuel consumption per unit time per unit indicated power.

Symbol: ISFC

Measurement: Specific Fuel ConsumptionUnit: kg/h/W

Note: Value should be greater than 0.

Formulas to find Indicated Specific Fuel Consumption

Fuel Consumption in IC engine

Fuel Consumption in IC engine is the amount of fuel consumed by the internal combustion engine.

Symbol: ṁ_f

Measurement: Mass Flow RateUnit: kg/s

Note: Value should be greater than 0.

Formulas to find Fuel Consumption in IC engine

Indicated Power

Indicated Power is the total power produced due to combustion of fuel within the IC engine's cylinder in one complete cycle neglecting any losses.

Symbol: IP

Measurement: PowerUnit: kW

Note: Value should be greater than 0.

Formulas to find Indicated Power

Other formulas in Important Formulas of Engine Dynamics category

Go Brake Power given Mean Effective Pressure

BP = (P mb \cdot L \cdot A \cdot (N))

Go Mechanical Efficiency of IC engine

η m = (\frac{BP}{IP}) \cdot 100

Go Brake Power given Mechanical Efficiency

BP = (\frac{η m}{100}) \cdot IP

Go Indicated Power given Mechanical Efficiency

IP = \frac{BP}{\frac{η m}{100}}

How to Evaluate Indicated specific fuel consumption?

Indicated specific fuel consumption evaluator uses Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power to evaluate the Indicated Specific Fuel Consumption, The Indicated Specific Fuel Consumption formula is defined as the fuel consumption per unit time divided by the indicated power of an IC engine. Indicated Specific Fuel Consumption is denoted by ISFC symbol.

How to evaluate Indicated specific fuel consumption using this online evaluator? To use this online evaluator for Indicated specific fuel consumption, enter Fuel Consumption in IC engine (ṁ_f) & Indicated Power (IP) and hit the calculate button.

FAQs on Indicated specific fuel consumption

What is the formula to find Indicated specific fuel consumption?

The formula of Indicated specific fuel consumption is expressed as Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power. Here is an example- 116.64 = 0.0009/900.

How to calculate Indicated specific fuel consumption?

With Fuel Consumption in IC engine (ṁ_f) & Indicated Power (IP) we can find Indicated specific fuel consumption using the formula - Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power.

Can the Indicated specific fuel consumption be negative?

No, the Indicated specific fuel consumption, measured in Specific Fuel Consumption cannot be negative.

Which unit is used to measure Indicated specific fuel consumption?

Indicated specific fuel consumption is usually measured using the Kilogram per Hour per Watt[kg/h/W] for Specific Fuel Consumption. Kilogram per Second per Watt[kg/h/W], Kilogram per Second per Brake horsepower[kg/h/W], Kilogram per Hour per Kilowatt[kg/h/W] are the few other units in which Indicated specific fuel consumption can be measured.

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Indicated specific fuel consumption Formula

Indicated specific fuel consumption Example

Indicated specific fuel consumption Solution

Indicated specific fuel consumption Formula Elements

Other formulas in Important Formulas of Engine Dynamics category

How to Evaluate Indicated specific fuel consumption?

FAQs on Indicated specific fuel consumption

Variable Name