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Logarithmic mean of temperature difference Formula

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Logarithmic Mean Temperature Difference is the log of the mean of the temperature values. Check FAQs

ΔT m = \frac{Q}{A \cdot U overall}

ΔT_m - Logarithmic Mean Temperature Difference?Q - Heat Flow Rate?A - Area?U_overall - Overall Heat Transfer Coefficient?

Logarithmic mean of temperature difference Example

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Here is how the Logarithmic mean of temperature difference equation looks like with Values.

Here is how the Logarithmic mean of temperature difference equation looks like with Units.

Here is how the Logarithmic mean of temperature difference equation looks like.

10 = \frac{125}{50 \cdot 0.25}

10 = \frac{125W}{50m² \cdot 0.25W/m²*K}

10 = \frac{125}{50 \cdot 0.25}

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Logarithmic mean of temperature difference Solution

Follow our step by step solution on how to calculate Logarithmic mean of temperature difference?

FIRST Step Consider the formula

ΔT m = \frac{Q}{A \cdot U overall}

Next Step Substitute values of Variables

∴

ΔT m = \frac{125W}{50m² \cdot 0.25W/m²*K}

Next Step Prepare to Evaluate

∴

ΔT m = \frac{125}{50 \cdot 0.25}

LAST Step Evaluate

∴

ΔT m = 10

Logarithmic mean of temperature difference Formula Elements

Variables

Logarithmic Mean Temperature Difference

Logarithmic Mean Temperature Difference is the log of the mean of the temperature values.

Symbol: ΔT_m

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Logarithmic Mean Temperature Difference

Heat Flow Rate

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.

Symbol: Q

Measurement: PowerUnit: W

Note: Value can be positive or negative.

Formulas to find Heat Flow Rate

Area

The area is the amount of two-dimensional space taken up by an object.

Symbol: A

Measurement: AreaUnit: m²

Note: Value should be greater than 0.

Formulas to find Area

Overall Heat Transfer Coefficient

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.

Symbol: U_overall

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value should be greater than 0.

Formulas to find Overall Heat Transfer Coefficient

Other formulas in Heat Transfer Through Fin category

Go Reynolds number in heat exchanger

Re = \frac{Δm \cdot De}{μ}

Go Mass flux of fluid in transverse fin heat exchanger

Δm = \frac{R e \cdot μ}{De}

Go Heat flow required

Q = A \cdot U overall \cdot ΔT m

Go Overall heat transfer coefficient

U overall = \frac{Q}{A \cdot ΔT m}

How to Evaluate Logarithmic mean of temperature difference?

Logarithmic mean of temperature difference evaluator uses Logarithmic Mean Temperature Difference = Heat Flow Rate/(Area*Overall Heat Transfer Coefficient) to evaluate the Logarithmic Mean Temperature Difference, The Logarithmic mean of temperature difference formula is defined as is a logarithmic average of the temperature difference between the hot and cold fluid at each end of the exchanger. Logarithmic Mean Temperature Difference is denoted by ΔT_m symbol.

How to evaluate Logarithmic mean of temperature difference using this online evaluator? To use this online evaluator for Logarithmic mean of temperature difference, enter Heat Flow Rate (Q), Area (A) & Overall Heat Transfer Coefficient (U_overall) and hit the calculate button.

FAQs on Logarithmic mean of temperature difference

What is the formula to find Logarithmic mean of temperature difference?

The formula of Logarithmic mean of temperature difference is expressed as Logarithmic Mean Temperature Difference = Heat Flow Rate/(Area*Overall Heat Transfer Coefficient). Here is an example- 10 = 125/(50*0.25).

How to calculate Logarithmic mean of temperature difference?

With Heat Flow Rate (Q), Area (A) & Overall Heat Transfer Coefficient (U_overall) we can find Logarithmic mean of temperature difference using the formula - Logarithmic Mean Temperature Difference = Heat Flow Rate/(Area*Overall Heat Transfer Coefficient).

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