Ishan Gupta
Birla Institute of Technology & Science (BITS), Pilani
Ishan Gupta has created this Calculator and 50+ more calculators!

## < 5 Other formulas that you can solve using the same Inputs

Number of Transfer Units in a Heat Exchanger
Number of Transfer Units= if(Mass of hot fluid*Specific Heat Capacity of Hot Fluid>Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid) { Number of Transfer Units=Overall Heat Transfer Coefficient/(Area*Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid) } else { Number of Transfer Units=Overall Heat Transfer Coefficient/(Area*Mass of hot fluid*Specific Heat Capacity of Hot Fluid) } GO
Log Mean Temperature Difference for Counter Current Flow
Log Mean Temperature Difference=((Outlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)-(Inlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid))/ln((Outlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)/(Inlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid)) GO
Log Mean Temperature Difference for CoCurrent Flow
Log Mean Temperature Difference=((Outlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid)-(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid))/ln((Outlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid)/(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) GO
Heat Transfer in a Heat Exchanger using cold fluid properties
Heat=Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Cold Fluid-Outlet Temperature of Cold Fluid) GO
Heat Transfer in a Heat Exchanger using hot fluid properties
Heat=Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid) GO

### Heat Exchanger Effectiveness Formula

Effectiveness of Heat Exchanger= if(Mass of hot fluid*Specific Heat Capacity of Hot Fluid>Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid) { Effectiveness of Heat Exchanger=Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid)/(Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) } else { Effectiveness of Heat Exchanger=Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Cold Fluid-Outlet Temperature of Cold Fluid)/(Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) }
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Heat Transfer Through Plane Wall or Surface GO
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Emmisive power of a body (Radiation) GO
Number of Transfer Units in a Heat Exchanger GO
Log Mean Temperature Difference for CoCurrent Flow GO
Log Mean Temperature Difference for Counter Current Flow GO
Heat Transfer in a Heat Exchanger using overall heat transfer coefficient GO
Heat Transfer in a Heat Exchanger using cold fluid properties GO
Heat Transfer in a Heat Exchanger using hot fluid properties GO
Reynolds Number for Circular Tubes GO
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Prandtl Number GO
Nusselt Number for Transitional and Rough Flow in Circular Tube GO
Stanton Number (using dimensionless numbers) GO
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Radial Heat flowing through a cylinder GO
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## Heat Exchanger Effectiveness

The heat exchanger effectiveness is defined as the ratio of the actual heat transfer to the maximum possible heat transfer.

## How to Calculate Heat Exchanger Effectiveness?

Heat Exchanger Effectiveness calculator uses Effectiveness of Heat Exchanger= if(Mass of hot fluid*Specific Heat Capacity of Hot Fluid>Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid) { Effectiveness of Heat Exchanger=Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid)/(Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) } else { Effectiveness of Heat Exchanger=Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Cold Fluid-Outlet Temperature of Cold Fluid)/(Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) } to calculate the Effectiveness of Heat Exchanger, The heat exchanger effectiveness is defined as the ratio of the actual heat transfer to the maximum possible heat transfer. . Effectiveness of Heat Exchanger and is denoted by ϵ symbol.

How to calculate Heat Exchanger Effectiveness using this online calculator? To use this online calculator for Heat Exchanger Effectiveness, enter Specific Heat Capacity of Cold Fluid (cc), Specific Heat Capacity of Hot Fluid (ch), Mass of hot fluid (mh), Mass of Cold Fluid (mc), Inlet Temperature of Cold Fluid (Tci), Inlet Temperature of Hot Fluid (Thi), Outlet Temperature of Hot Fluid (Tho) and Outlet Temperature of Cold Fluid (Tco) and hit the calculate button. Here is how the Heat Exchanger Effectiveness calculation can be explained with given input values -> -0.166667 = if(10*10>10*10) { 10*10*(35-20)/(10*10*(35-5)) } else { 10*10*(5-10)/(10*10*(35-5)) } .

### FAQ

What is Heat Exchanger Effectiveness?
The heat exchanger effectiveness is defined as the ratio of the actual heat transfer to the maximum possible heat transfer. and is represented as ϵ= if(mh*ch>mc*cc) { ϵ=mh*ch*(Thi-Tho)/(mc*cc*(Thi-Tci)) } else { ϵ=mc*cc*(Tci-Tco)/(mh*ch*(Thi-Tci)) } or Effectiveness of Heat Exchanger= if(Mass of hot fluid*Specific Heat Capacity of Hot Fluid>Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid) { Effectiveness of Heat Exchanger=Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid)/(Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) } else { Effectiveness of Heat Exchanger=Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Cold Fluid-Outlet Temperature of Cold Fluid)/(Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) } . Specific Heat Capacity of Cold Fluid is a physical property of matter, defined as the amount of heat to be supplied to a unit mass of the cooler fluid to produce a unit change in its temperature, Specific Heat Capacity of Hot Fluid is a physical property of matter, defined as the amount of heat to be supplied to a unit mass of the hotter fluid to produce a unit change in its temperature, Mass of hot fluid is the mass of the hotter fluid in the heat exchanger, Mass of Cold Fluid is the mass of the cooler fluid in the heat exchanger, Inlet Temperature of Cold Fluid is the temperature at which the cold fluid enters the heat exchanger, Inlet Temperature of Hot Fluid is the temperature at which the hot fluid enters the heat exchanger, Outlet Temperature of Hot Fluid is the temperature at which the hot fluid exits the heat exchanger and Outlet Temperature of Cold Fluid is the temperature at which the cold fluid exits the heat exchanger.
How to calculate Heat Exchanger Effectiveness?
The heat exchanger effectiveness is defined as the ratio of the actual heat transfer to the maximum possible heat transfer. is calculated using Effectiveness of Heat Exchanger= if(Mass of hot fluid*Specific Heat Capacity of Hot Fluid>Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid) { Effectiveness of Heat Exchanger=Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid)/(Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) } else { Effectiveness of Heat Exchanger=Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Cold Fluid-Outlet Temperature of Cold Fluid)/(Mass of hot fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)) } . To calculate Heat Exchanger Effectiveness, you need Specific Heat Capacity of Cold Fluid (cc), Specific Heat Capacity of Hot Fluid (ch), Mass of hot fluid (mh), Mass of Cold Fluid (mc), Inlet Temperature of Cold Fluid (Tci), Inlet Temperature of Hot Fluid (Thi), Outlet Temperature of Hot Fluid (Tho) and Outlet Temperature of Cold Fluid (Tco). With our tool, you need to enter the respective value for Specific Heat Capacity of Cold Fluid, Specific Heat Capacity of Hot Fluid, Mass of hot fluid, Mass of Cold Fluid, Inlet Temperature of Cold Fluid, Inlet Temperature of Hot Fluid, Outlet Temperature of Hot Fluid and Outlet Temperature of Cold Fluid 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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