Overall heat transfer coefficient Calculator

✖Heat Flow Rate is the amount of heat that is transferred per unit of time in some material, usually measured in watt. Heat is the flow of thermal energy driven by thermal non-equilibrium.ⓘ Heat Flow Rate [Q]			+10% -10%
✖The area is the amount of two-dimensional space taken up by an object.ⓘ Area [A]			+10% -10%
✖Logarithmic Mean Temperature Difference is the log of the mean of the temperature values.ⓘ Logarithmic Mean Temperature Difference [ΔT_m]			+10% -10%

✖Overall heat transfer coefficient is the overall convective heat transfer between a fluid medium (a fluid) and the surface (wall) flowed over by the fluid.ⓘ Overall heat transfer coefficient [U_overall]

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Overall heat transfer coefficient Solution

STEP 0: Pre-Calculation Summary

Formula Used

Overall Heat Transfer Coefficient = Heat Flow Rate/(Area*Logarithmic Mean Temperature Difference)
U_overall = Q/(A*ΔT_m)
This formula uses 4 Variables

Variables Used

Overall Heat Transfer Coefficient - (Measured in Watt per Square Meter per Kelvin) - Overall heat transfer coefficient is the overall convective heat transfer between a fluid medium (a fluid) and the surface (wall) flowed over by the fluid.
Heat Flow Rate - (Measured in Watt) - Heat Flow Rate is the amount of heat that is transferred per unit of time in some material, usually measured in watt. Heat is the flow of thermal energy driven by thermal non-equilibrium.
Area - (Measured in Square Meter) - The area is the amount of two-dimensional space taken up by an object.
Logarithmic Mean Temperature Difference - Logarithmic Mean Temperature Difference is the log of the mean of the temperature values.

STEP 1: Convert Input(s) to Base Unit

Heat Flow Rate: 125 Watt --> 125 Watt No Conversion Required
Area: 50 Square Meter --> 50 Square Meter No Conversion Required
Logarithmic Mean Temperature Difference: 30 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

U_overall = Q/(A*ΔT_m) --> 125/(50*30)

Evaluating ... ...

U_overall = 0.0833333333333333

STEP 3: Convert Result to Output's Unit

0.0833333333333333 Watt per Square Meter per Kelvin --> No Conversion Required

FINAL ANSWER

0.0833333333333333 ≈ 0.083333 Watt per Square Meter per Kelvin <-- Overall Heat Transfer Coefficient

(Calculation completed in 00.020 seconds)

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Home » Physics » Heat and Mass Transfer » Heat Exchanger » Transverse Fin Heat Exchanger » Mechanical » Heat Transfer Through Fin » Overall heat transfer coefficient

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Created by Nishan Poojary

Shri Madhwa Vadiraja Institute of Technology and Management (SMVITM), Udupi

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< Heat Transfer Through Fin Calculators

Overall heat transfer coefficient

LaTeX Go Overall Heat Transfer Coefficient = Heat Flow Rate/(Area*Logarithmic Mean Temperature Difference)

Heat flow required

LaTeX Go Heat Flow Rate = Area*Overall Heat Transfer Coefficient*Logarithmic Mean Temperature Difference

Mass flux of fluid in transverse fin heat exchanger

LaTeX Go Mass Flux = (Reynolds Number(e)*Viscosity of Fluid)/Equivalent Diameter

Reynolds number in heat exchanger

LaTeX Go Reynolds Number = (Mass Flux*Equivalent Diameter)/(Viscosity of Fluid)

Overall heat transfer coefficient Formula

LaTeX Go

Overall Heat Transfer Coefficient = Heat Flow Rate/(Area*Logarithmic Mean Temperature Difference)
U_overall = Q/(A*ΔT_m)

What is Heat exchanger?

A heat exchanger is a system used to transfer heat between two or more fluids. Heat exchangers are used in both cooling and heating processes. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air. Another example is the heat sink, which is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant.

How to Calculate Overall heat transfer coefficient?

Overall heat transfer coefficient calculator uses Overall Heat Transfer Coefficient = Heat Flow Rate/(Area*Logarithmic Mean Temperature Difference) to calculate the Overall Heat Transfer Coefficient, Overall heat transfer coefficient formula is defined as a measure of the efficiency of heat transfer through a system, considering the heat transfer rate, surface area, and the temperature difference across the system. Overall Heat Transfer Coefficient is denoted by U_overall symbol.

How to calculate Overall heat transfer coefficient using this online calculator? To use this online calculator for Overall heat transfer coefficient, enter Heat Flow Rate (Q), Area (A) & Logarithmic Mean Temperature Difference (ΔT_m) and hit the calculate button. Here is how the Overall heat transfer coefficient calculation can be explained with given input values -> 0.083333 = 125/(50*30).

FAQ

What is Overall heat transfer coefficient?

Overall heat transfer coefficient formula is defined as a measure of the efficiency of heat transfer through a system, considering the heat transfer rate, surface area, and the temperature difference across the system and is represented as U_overall = Q/(A*ΔT_m) or Overall Heat Transfer Coefficient = Heat Flow Rate/(Area*Logarithmic Mean Temperature Difference). Heat Flow Rate is the amount of heat that is transferred per unit of time in some material, usually measured in watt. Heat is the flow of thermal energy driven by thermal non-equilibrium, The area is the amount of two-dimensional space taken up by an object & Logarithmic Mean Temperature Difference is the log of the mean of the temperature values.

How to calculate Overall heat transfer coefficient?

Overall heat transfer coefficient formula is defined as a measure of the efficiency of heat transfer through a system, considering the heat transfer rate, surface area, and the temperature difference across the system is calculated using Overall Heat Transfer Coefficient = Heat Flow Rate/(Area*Logarithmic Mean Temperature Difference). To calculate Overall heat transfer coefficient, you need Heat Flow Rate (Q), Area (A) & Logarithmic Mean Temperature Difference (ΔT_m). With our tool, you need to enter the respective value for Heat Flow Rate, Area & Logarithmic Mean Temperature Difference 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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