Rate of convection heat transfer between engine wall and coolant Calculator

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Fundamentals of IC Engine

Air-Standard Cycles

Design of IC Engine Components

Engine Performance Parameters

Fuel Injection in IC Engine

✖Convection Heat Transfer Coefficient is the rate of heat transfer between a solid surface and a fluid per unit surface area per unit temperature.ⓘ Convection Heat Transfer Coefficient [h]			+10% -10%
✖Surface Area of Engine Wall is defined as the area of the engine wall considered for calculating heat flow through it.ⓘ Surface Area of Engine Wall [A]			+10% -10%
✖Engine wall surface temperature is the temperature recorded at the outer surface of engine wall at any instant.ⓘ Engine Wall Surface Temperature [T_s]			+10% -10%
✖Temperature of Coolant is defined as the temperature of the fluid sufficiently far from the surface of engine wall.ⓘ Temperature of Coolant [T_c]			+10% -10%

✖Rate of Convection Heat Transfer is defined as the total amount of heat dissipated to the coolant from the solid engine wall.ⓘ Rate of convection heat transfer between engine wall and coolant [Q_conv]

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Formula

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Rate of convection heat transfer between engine wall and coolant

Formula

`"Q"_{"conv"} = "h"*"A"*("T"_{"s"}-"T"_{"c"})`

Example

`"22.77W"="2.2W/m²*K"*"0.069m²"*("450K"-"300K")`

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Rate of convection heat transfer between engine wall and coolant Solution

STEP 0: Pre-Calculation Summary

Formula Used

Rate of Convection Heat Transfer = Convection Heat Transfer Coefficient*Surface Area of Engine Wall*(Engine Wall Surface Temperature-Temperature of Coolant)
Q_conv = h*A*(T_s-T_c)
This formula uses 5 Variables

Variables Used

Rate of Convection Heat Transfer - (Measured in Watt) - Rate of Convection Heat Transfer is defined as the total amount of heat dissipated to the coolant from the solid engine wall.
Convection Heat Transfer Coefficient - (Measured in Watt per Square Meter per Kelvin) - Convection Heat Transfer Coefficient is the rate of heat transfer between a solid surface and a fluid per unit surface area per unit temperature.
Surface Area of Engine Wall - (Measured in Square Meter) - Surface Area of Engine Wall is defined as the area of the engine wall considered for calculating heat flow through it.
Engine Wall Surface Temperature - (Measured in Kelvin) - Engine wall surface temperature is the temperature recorded at the outer surface of engine wall at any instant.
Temperature of Coolant - (Measured in Kelvin) - Temperature of Coolant is defined as the temperature of the fluid sufficiently far from the surface of engine wall.

STEP 1: Convert Input(s) to Base Unit

Convection Heat Transfer Coefficient: 2.2 Watt per Square Meter per Kelvin --> 2.2 Watt per Square Meter per Kelvin No Conversion Required
Surface Area of Engine Wall: 0.069 Square Meter --> 0.069 Square Meter No Conversion Required
Engine Wall Surface Temperature: 450 Kelvin --> 450 Kelvin No Conversion Required
Temperature of Coolant: 300 Kelvin --> 300 Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

Q_conv = h*A*(T_s-T_c) --> 2.2*0.069*(450-300)

Evaluating ... ...

Q_conv = 22.77

STEP 3: Convert Result to Output's Unit

22.77 Watt --> No Conversion Required

FINAL ANSWER

22.77 Watt <-- Rate of Convection Heat Transfer

(Calculation completed in 00.004 seconds)

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Created by Syed Adnan

Ramaiah University of Applied Sciences (RUAS), bangalore

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National Institute Of Technology (NIT), Hamirpur

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< 22 Fundamentals of IC Engine Calculators

Overall heat transfer coefficient of IC engine

Go Overall Heat Transfer Coefficient = 1/((1/Heat Transfer Coefficient on Gas Side)+(Thickness of Engine Wall/Thermal conductivity of material)+(1/Heat Transfer Coefficient on Coolant Side))

Fuel Jet Velocity

Go Fuel jet velocity = Coefficient of Discharge*sqrt(((2*(Fuel injection pressure-Pressure of charge inside the cylinder))/Fuel Density))

Rate of convection heat transfer between engine wall and coolant

Go Rate of Convection Heat Transfer = Convection Heat Transfer Coefficient*Surface Area of Engine Wall*(Engine Wall Surface Temperature-Temperature of Coolant)

Mass of air taken in each cylinder

Go Mass of air taken in each cylinder = (Intake air pressure*(Clearance volume+Displaced volume))/([R]*Intake air temperature)

Heat transfer across engine wall given overall heat transfer coefficient

Go Heat Transfer across Engine Wall = Overall Heat Transfer Coefficient*Surface Area of Engine Wall*(Gas side temperature-Coolant Side Temperature)

Power produced by IC engine given work done by engine

Go Power produced by IC engine = Work done per operating cycle*(Engine speed in rps/Crankshaft revolutions per power stroke)

Engine displacement given number of cylinders

Go Engine Displacement = Engine bore*Engine bore*Stroke Length*0.7854*Number of Cylinders

Rate of cooling of engine

Go Rate of Cooling = Rate of Cooling Constant*(Engine Temperature-Engine surrounding Temperature)

Time taken for engine to cool

Go Time taken to cool Engine = (Engine Temperature-Final Engine Temperature)/Rate of Cooling

Engine rpm

Go Engine RPM = (Speed of vehicle in mph*Gear Ratio of Transmission*336)/Tire Diameter

Kinetic energy stored in flywheel of IC engine

Go Kinetic energy stored in the flywheel = (Flywheel moment of inertia*(Flywheel angular velocity^2))/2

Swept Volume

Go Swept volume = (((pi/4)*Inner Diameter of Cylinder^2)*Stroke Length)

Work done per operating cycle in IC engine

Go Work done per operating cycle = Mean effective pressure in pascals*Displacement volume of piston

Brake output per displacement of piston

Go Brake output per displacement = Brake power per cylinder per stroke/Displaced volume

Engine specific volume

Go Engine specific volume = Displaced volume/Brake power per cylinder per stroke

Brake specific power

Go Brake specific power = Brake power per cylinder per stroke/Area of Piston

Equivalence ratio

Go Equivalence ratio = Actual Air Fuel Ratio/Stoichiometric Air Fuel Ratio

Brake work per cylinder per stroke

Go Brake work per cylinder per stroke = Bmep*Displaced volume

Compression Ratio given Clearance and Swept Volume

Go Compression Ratio = 1+(Swept volume/Clearance volume)

Engine Capacity

Go Engine capacity = Swept volume*Number of Cylinders

Mean piston speed

Go Mean Piston Speed = 2*Stroke Length*Engine Speed

Peak torque of engine

Go Peak Torque of Engine = Engine Displacement*1.25

Rate of convection heat transfer between engine wall and coolant Formula

Rate of Convection Heat Transfer = Convection Heat Transfer Coefficient*Surface Area of Engine Wall*(Engine Wall Surface Temperature-Temperature of Coolant)
Q_conv = h*A*(T_s-T_c)

What is rate of convection heat transfer?

The rate of heat loss of a body is directly proportional to the difference in the temperatures between the body, and its surroundings, provided the temperature difference is small, and the nature of radiating surface remains the same. Despite the complexity of convection, the rate of convection heat transfer is observed to be proportional to the temperature difference. It is conveniently expressed by Newton’s law of cooling.

How to Calculate Rate of convection heat transfer between engine wall and coolant?

Rate of convection heat transfer between engine wall and coolant calculator uses Rate of Convection Heat Transfer = Convection Heat Transfer Coefficient*Surface Area of Engine Wall*(Engine Wall Surface Temperature-Temperature of Coolant) to calculate the Rate of Convection Heat Transfer, The Rate of convection heat transfer between engine wall and coolant formula is defined as the total amount of heat dissipated to the coolant from the solid engine wall. Rate of Convection Heat Transfer is denoted by Q_conv symbol.

How to calculate Rate of convection heat transfer between engine wall and coolant using this online calculator? To use this online calculator for Rate of convection heat transfer between engine wall and coolant, enter Convection Heat Transfer Coefficient (h), Surface Area of Engine Wall (A), Engine Wall Surface Temperature (T_s) & Temperature of Coolant (T_c) and hit the calculate button. Here is how the Rate of convection heat transfer between engine wall and coolant calculation can be explained with given input values -> 22.77 = 2.2*0.069*(450-300).

FAQ

What is Rate of convection heat transfer between engine wall and coolant?

The Rate of convection heat transfer between engine wall and coolant formula is defined as the total amount of heat dissipated to the coolant from the solid engine wall and is represented as Q_conv = h*A*(T_s-T_c) or Rate of Convection Heat Transfer = Convection Heat Transfer Coefficient*Surface Area of Engine Wall*(Engine Wall Surface Temperature-Temperature of Coolant). Convection Heat Transfer Coefficient is the rate of heat transfer between a solid surface and a fluid per unit surface area per unit temperature, Surface Area of Engine Wall is defined as the area of the engine wall considered for calculating heat flow through it, Engine wall surface temperature is the temperature recorded at the outer surface of engine wall at any instant & Temperature of Coolant is defined as the temperature of the fluid sufficiently far from the surface of engine wall.

How to calculate Rate of convection heat transfer between engine wall and coolant?

The Rate of convection heat transfer between engine wall and coolant formula is defined as the total amount of heat dissipated to the coolant from the solid engine wall is calculated using Rate of Convection Heat Transfer = Convection Heat Transfer Coefficient*Surface Area of Engine Wall*(Engine Wall Surface Temperature-Temperature of Coolant). To calculate Rate of convection heat transfer between engine wall and coolant, you need Convection Heat Transfer Coefficient (h), Surface Area of Engine Wall (A), Engine Wall Surface Temperature (T_s) & Temperature of Coolant (T_c). With our tool, you need to enter the respective value for Convection Heat Transfer Coefficient, Surface Area of Engine Wall, Engine Wall Surface Temperature & Temperature of Coolant 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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