Indicated specific fuel consumption Calculator

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Engine Performance Parameters

Air-Standard Cycles

Design of IC Engine Components

Fuel Injection in IC Engine

Fundamentals of IC Engine

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✖Fuel Consumption in IC engine is the amount of fuel consumed by the engine.ⓘ Fuel Consumption in IC engine [ṁ_f]			+10% -10%
✖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.ⓘ Indicated Power [IP]			+10% -10%

✖Indicated Specific Fuel Consumption is the fuel consumption per unit time per unit indicated power.ⓘ Indicated specific fuel consumption [ISFC]

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Formula

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Indicated specific fuel consumption

Formula

`"ISFC" = "ṁ"_{"f"}/"IP"`

Example

`"0.0324kg/h/W"="0.00090kg/s"/"0.1kW"`

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Indicated specific fuel consumption Solution

STEP 0: Pre-Calculation Summary

Formula Used

Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power
ISFC = ṁ_f/IP
This formula uses 3 Variables

Variables Used

Indicated Specific Fuel Consumption - (Measured in Kilogram per Second per Watt) - Indicated Specific Fuel Consumption is the fuel consumption per unit time per unit indicated power.
Fuel Consumption in IC engine - (Measured in Kilogram per Second) - Fuel Consumption in IC engine is the amount of fuel consumed by the engine.
Indicated Power - (Measured in Watt) - 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.

STEP 1: Convert Input(s) to Base Unit

Fuel Consumption in IC engine: 0.0009 Kilogram per Second --> 0.0009 Kilogram per Second No Conversion Required
Indicated Power: 0.1 Kilowatt --> 100 Watt (Check conversion here)

STEP 2: Evaluate Formula

Substituting Input Values in Formula

ISFC = ṁ_f/IP --> 0.0009/100

Evaluating ... ...

ISFC = 9E-06

STEP 3: Convert Result to Output's Unit

9E-06 Kilogram per Second per Watt -->0.0324 Kilogram per Hour per Watt (Check conversion here)

FINAL ANSWER

0.0324 Kilogram per Hour per Watt <-- Indicated Specific Fuel Consumption

(Calculation completed in 00.020 seconds)

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Created by Aditya Prakash Gautam

Indian Institute of Technology (IIT (ISM) ), Dhanbad, Jharkhand

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National Institute Of Technology (NIT), Hamirpur

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< 13 Engine Performance Parameters Calculators

Inlet-Valve Mach Index

Go Mach Index = ((Cylinder Diameter/Inlet Valve Diameter)^2)*((Mean Piston Speed)/(Flow Coefficient*Sonic Velocity))

Brake Power given Mean Effective Pressure

Go Brake Power = (Brake Mean Effective Pressure*Stroke Length*Area of Cross Section*(Engine Speed))

Indicated Thermal Efficiency given Indicated Power

Go Indicated Thermal Efficiency = ((Indicated Power)/(Mass of fuel supplied per second*Calorific value of fuel))*100

Brake Thermal Efficiency given Brake Power

Go Brake Thermal Efficiency = (Brake Power/(Mass of fuel supplied per second*Calorific value of fuel))*100

Indicated specific fuel consumption

Go Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power

Indicated Thermal Efficiency given Relative Efficiency

Go Indicated Thermal Efficiency = (Relative Efficiency*Air Standard Efficiency)/100

Relative Efficiency

Go Relative Efficiency = (Indicated Thermal Efficiency/Air Standard Efficiency)*100

Brake specific fuel consumption

Go Brake Specific Fuel Consumption = Fuel Consumption in IC engine/Brake Power

Indicated Power given Mechanical Efficiency

Go Indicated Power = Brake Power/(Mechanical Efficiency/100)

Brake Power given Mechanical Efficiency

Go Brake Power = (Mechanical Efficiency/100)*Indicated Power

Mechanical Efficiency of IC engine

Go Mechanical Efficiency = (Brake Power/Indicated Power)*100

Specific Power Output

Go Specific Power Output = Brake Power/Area of Cross Section

Friction Power

Go Friction Power = Indicated Power-Brake Power

Indicated specific fuel consumption Formula

Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power
ISFC = ṁ_f/IP

What are the factors on which fuel consumption depends ?

The amount of fuel consumed depends on the engine, the type of fuel used, and the efficiency with which the output of the engine is transmitted to the wheels.

How to Calculate Indicated specific fuel consumption?

Indicated specific fuel consumption calculator uses Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power to calculate 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 calculate Indicated specific fuel consumption using this online calculator? To use this online calculator for Indicated specific fuel consumption, enter Fuel Consumption in IC engine (ṁ_f) & Indicated Power (IP) and hit the calculate button. Here is how the Indicated specific fuel consumption calculation can be explained with given input values -> 116.64 = 0.0009/100.

FAQ

What is 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 and is represented as ISFC = ṁ_f/IP or Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power. Fuel Consumption in IC engine is the amount of fuel consumed by the engine & 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.

How to calculate 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 is calculated using Indicated Specific Fuel Consumption = Fuel Consumption in IC engine/Indicated Power. To calculate Indicated specific fuel consumption, you need Fuel Consumption in IC engine (ṁ_f) & Indicated Power (IP). With our tool, you need to enter the respective value for Fuel Consumption in IC engine & Indicated Power and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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