Fouling Factor Calculator

✖Overall Heat Transfer Coefficient after Fouling is defined as the overall HT Coefficient of uncleaned heat exchanger after fouling has occured in it.ⓘ Overall Heat Transfer Coefficient after Fouling [U_d]			+10% -10%
✖The Overall Heat Transfer Coefficient is a measure of the overall ability of a series of conductive and convective barriers to transfer heat.ⓘ Overall Heat Transfer Coefficient [U]			+10% -10%

✖Fouling Factor represents the theoretical resistance to heat flow due to the buildup of a fouling layer on the tube surfaces of the heat exchanger.ⓘ Fouling Factor [R_f]

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Formula

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Fouling Factor

Formula

`"R"_{"f"} = (1/"U"_{"d"})-(1/"U")`

Example

`"1.000641m²K/W"=(1/"0.975W/m²*K")-(1/"40W/m²*K")`

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Fouling Factor Solution

STEP 0: Pre-Calculation Summary

Formula Used

Fouling Factor = (1/Overall Heat Transfer Coefficient after Fouling)-(1/Overall Heat Transfer Coefficient)
R_f = (1/U_d)-(1/U)
This formula uses 3 Variables

Variables Used

Fouling Factor - (Measured in Square Meter Kelvin per Watt) - Fouling Factor represents the theoretical resistance to heat flow due to the buildup of a fouling layer on the tube surfaces of the heat exchanger.
Overall Heat Transfer Coefficient after Fouling - (Measured in Watt per Square Meter per Kelvin) - Overall Heat Transfer Coefficient after Fouling is defined as the overall HT Coefficient of uncleaned heat exchanger after fouling has occured in it.
Overall Heat Transfer Coefficient - (Measured in Watt per Square Meter per Kelvin) - The Overall Heat Transfer Coefficient is a measure of the overall ability of a series of conductive and convective barriers to transfer heat.

STEP 1: Convert Input(s) to Base Unit

Overall Heat Transfer Coefficient after Fouling: 0.975 Watt per Square Meter per Kelvin --> 0.975 Watt per Square Meter per Kelvin No Conversion Required
Overall Heat Transfer Coefficient: 40 Watt per Square Meter per Kelvin --> 40 Watt per Square Meter per Kelvin No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

R_f = (1/U_d)-(1/U) --> (1/0.975)-(1/40)

Evaluating ... ...

R_f = 1.00064102564103

STEP 3: Convert Result to Output's Unit

1.00064102564103 Square Meter Kelvin per Watt --> No Conversion Required

FINAL ANSWER

1.00064102564103 ≈ 1.000641 Square Meter Kelvin per Watt <-- Fouling Factor

(Calculation completed in 00.020 seconds)

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Credits

Created by Ayush gupta

University School of Chemical Technology-USCT (GGSIPU), New Delhi

Ayush gupta has created this Calculator and 300+ more calculators!

Verified by Soupayan banerjee

National University of Judicial Science (NUJS), Kolkata

Soupayan banerjee has verified this Calculator and 800+ more calculators!

< 10+ Heat Exchanger Calculators

Overall Heat Transfer Coefficient for Unfinned Tube

Go Overall Heat Transfer Coefficient after Fouling = 1/((1/External Convection Heat Transfer Coefficient)+Fouling Factor on Outside of Tube+(((Outside Tube Diameter*(ln(Outside Tube Diameter/Inside Tube Diameter))))/(2*Thermal Conductivity))+((Fouling Factor on Inside of Tube*Outside Tube Surface Area)/Inside Tube Surface Area)+(Outside Tube Surface Area/(Inside Convection Heat Transfer Coefficient*Inside Tube Surface Area)))

Total Heat Transfer Coefficient for Long Cylinder

Go Heat Transfer Coefficient = ((0.023*(Mass Velocity^0.8)*(Thermal Conductivity^0.67)*(Specific Heat Capacity^0.33))/((Diameter of Tube^0.2)*(Viscosity of Fluid^0.47)))

Heat Transfer in Heat Exchanger given Cold Fluid Properties

Go Heat = modulus(Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Cold Fluid- Outlet Temperature of Cold Fluid))

Heat Transfer in Heat Exchanger given Hot Fluid Properties

Go Heat = Mass of Hot Fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid)

Rate of Heat Transfer using Correction Factor and LMTD

Go Heat Transfer = Overall Heat Transfer Coefficient*Area of Heat Exchanger*Correction Factor *Log Mean Temperature Difference

Maximum Possible Rate of Heat Transfer

Go Maximum Possible Rate of Heat Transfer = Minimum Capacity Rate*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)

Number of Heat Transfer Units

Go Number of Heat Transfer Units = (Overall Heat Transfer Coefficient*Area of Heat Exchanger)/Minimum Capacity Rate

Heat Transfer in Heat Exchanger given Overall Heat Transfer Coefficient

Go Heat = Overall Heat Transfer Coefficient*Area of Heat Exchanger*Log Mean Temperature Difference

Fouling Factor

Go Fouling Factor = (1/Overall Heat Transfer Coefficient after Fouling)-(1/Overall Heat Transfer Coefficient)

Capacity Rate

Go Capacity Rate = Mass Flow Rate*Specific Heat Capacity

< 15 Heat Exchanger and its Effectiveness Calculators

Overall Heat Transfer Coefficient for Unfinned Tube

Effectiveness of Counter-Current Heat Exchanger if Cold Fluid is Minimum Fluid

Go Effectiveness of HE when Cold Fluid is Min Fluid = (modulus((Inlet Temperature of Cold Fluid-Outlet Temperature of Cold Fluid))/(Inlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid))

Effectiveness of Parallel-Flow Heat Exchanger if Cold Fluid is Minimum Fluid

Go Effectiveness of HE when Cold Fluid is Min Fluid = (Outlet Temperature of Cold Fluid-Inlet Temperature of Cold Fluid)/(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)

Effectiveness of Parallel-Flow Heat Exchanger if Hot Fluid is Minimum Fluid

Go Effectiveness of HE when Hot Fluid is Min Fluid = ((Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid)/(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid))

Effectiveness of Counter-Current Heat Exchanger if Hot Fluid is Minimum Fluid

Go Effectiveness of HE when Hot Fluid is Min Fluid = (Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid)/(Inlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid)

Heat Transfer in Heat Exchanger given Cold Fluid Properties

Go Heat = modulus(Mass of Cold Fluid*Specific Heat Capacity of Cold Fluid*(Inlet Temperature of Cold Fluid- Outlet Temperature of Cold Fluid))

Heat Transfer in Heat Exchanger given Hot Fluid Properties

Go Heat = Mass of Hot Fluid*Specific Heat Capacity of Hot Fluid*(Inlet Temperature of Hot Fluid-Outlet Temperature of Hot Fluid)

Rate of Heat Transfer using Correction Factor and LMTD

Go Heat Transfer = Overall Heat Transfer Coefficient*Area of Heat Exchanger*Correction Factor *Log Mean Temperature Difference

Maximum Possible Rate of Heat Transfer

Go Maximum Possible Rate of Heat Transfer = Minimum Capacity Rate*(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)

Number of Heat Transfer Units

Go Number of Heat Transfer Units = (Overall Heat Transfer Coefficient*Area of Heat Exchanger)/Minimum Capacity Rate

Heat Transfer in Heat Exchanger given Overall Heat Transfer Coefficient

Go Heat = Overall Heat Transfer Coefficient*Area of Heat Exchanger*Log Mean Temperature Difference

Heat Exchanger Effectiveness for Minimum Fluid

Go Effectiveness of Heat Exchanger = Temperature Difference of Minimum Fluid/Maximum Temperature Difference in Heat Exchanger

Fouling Factor

Go Fouling Factor = (1/Overall Heat Transfer Coefficient after Fouling)-(1/Overall Heat Transfer Coefficient)

Heat Exchanger Effectiveness

Go Effectiveness of Heat Exchanger = Actual Rate of Heat Transfer/Maximum Possible Rate of Heat Transfer

Capacity Rate

Go Capacity Rate = Mass Flow Rate*Specific Heat Capacity

Fouling Factor Formula

Fouling Factor = (1/Overall Heat Transfer Coefficient after Fouling)-(1/Overall Heat Transfer Coefficient)
R_f = (1/U_d)-(1/U)

What is Heat Exchanger?

A Heat Exchanger is a device that facilitates the process of heat exchange between two fluids that are at different temperatures.

What are the Different Types of Heat Exchanger?

Mainly Heat Exchanger are divided in 4 categories: Hairpin Type Heat Exchanger, Double Pipe Heat Exchanger, Shell and Tube Heat Exchanger & Plate Type Heat Exchanger.

How to Calculate Fouling Factor?

Fouling Factor calculator uses Fouling Factor = (1/Overall Heat Transfer Coefficient after Fouling)-(1/Overall Heat Transfer Coefficient) to calculate the Fouling Factor, The Fouling Factor formula is defined as the difference of the reciprocal of overall HT coefficient after fouling and before fouling. Fouling Factor is denoted by R_f symbol.

How to calculate Fouling Factor using this online calculator? To use this online calculator for Fouling Factor, enter Overall Heat Transfer Coefficient after Fouling (U_d) & Overall Heat Transfer Coefficient (U) and hit the calculate button. Here is how the Fouling Factor calculation can be explained with given input values -> 1.000641 = (1/0.975)-(1/40).

FAQ

What is Fouling Factor?

The Fouling Factor formula is defined as the difference of the reciprocal of overall HT coefficient after fouling and before fouling and is represented as R_f = (1/U_d)-(1/U) or Fouling Factor = (1/Overall Heat Transfer Coefficient after Fouling)-(1/Overall Heat Transfer Coefficient). Overall Heat Transfer Coefficient after Fouling is defined as the overall HT Coefficient of uncleaned heat exchanger after fouling has occured in it & The Overall Heat Transfer Coefficient is a measure of the overall ability of a series of conductive and convective barriers to transfer heat.

How to calculate Fouling Factor?

The Fouling Factor formula is defined as the difference of the reciprocal of overall HT coefficient after fouling and before fouling is calculated using Fouling Factor = (1/Overall Heat Transfer Coefficient after Fouling)-(1/Overall Heat Transfer Coefficient). To calculate Fouling Factor, you need Overall Heat Transfer Coefficient after Fouling (U_d) & Overall Heat Transfer Coefficient (U). With our tool, you need to enter the respective value for Overall Heat Transfer Coefficient after Fouling & Overall Heat Transfer Coefficient 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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