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Overall heat transfer coefficient given LMTD Formula

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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. Check FAQs

U = \frac{Q}{f \cdot A \cdot ΔT m}

U - Overall Heat Transfer Coefficient?Q - Heat exchanged?f - Correction Factor?A - Area?ΔT_m - Logarithmic Mean Temperature Difference?

Overall heat transfer coefficient given LMTD Example

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Here is how the Overall heat transfer coefficient given LMTD equation looks like with Values.

Here is how the Overall heat transfer coefficient given LMTD equation looks like with Units.

Here is how the Overall heat transfer coefficient given LMTD equation looks like.

0.0667 = \frac{50}{0.5 \cdot 50 \cdot 30}

0.0667W/m²*K = \frac{50W}{0.5 \cdot 50m² \cdot 30}

0.0667 = \frac{50}{0.5 \cdot 50 \cdot 30}

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Overall heat transfer coefficient given LMTD Solution

Follow our step by step solution on how to calculate Overall heat transfer coefficient given LMTD?

FIRST Step Consider the formula

U = \frac{Q}{f \cdot A \cdot ΔT m}

Next Step Substitute values of Variables

∴

U = \frac{50W}{0.5 \cdot 50m² \cdot 30}

Next Step Prepare to Evaluate

∴

U = \frac{50}{0.5 \cdot 50 \cdot 30}

Next Step Evaluate

∴

U = 0.0666666666666667W/m²*K

LAST Step Rounding Answer

∴

U = 0.0667W/m²*K

Overall heat transfer coefficient given LMTD Formula Elements

Variables

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

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find Overall Heat Transfer Coefficient

Heat exchanged

Heat exchanged is the amount of heat transferred between two objects.

Symbol: Q

Measurement: PowerUnit: W

Note: Value can be positive or negative.

Formulas to find Heat exchanged

Correction Factor

Correction Factor is that which is multiplied with the result of an equation to correct for a known amount of systematic error.

Symbol: f

Measurement: NAUnit: Unitless

Note: Value can be positive or negative.

Formulas to find Correction Factor

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

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

Other formulas in Thermal Parameters of Heat Exchanger category

Go Logarithmic mean temperature difference for single pass counter flow

ΔT m = \frac{(T1 - t2) - (t1 - T2)}{\ln (\frac{T1 - t2}{t1 - T2})}

Go Heat exchanged

Q = f \cdot U \cdot A \cdot ΔT m

Go Logarithmic mean temperature difference

ΔT m = \frac{Q}{f \cdot U \cdot A}

Go Heat exchanged NTU method

Q = ϵ \cdot C min \cdot (T1 - t1)

How to Evaluate Overall heat transfer coefficient given LMTD?

Overall heat transfer coefficient given LMTD evaluator uses Overall Heat Transfer Coefficient = Heat exchanged/(Correction Factor*Area*Logarithmic Mean Temperature Difference) to evaluate the Overall Heat Transfer Coefficient, Overall heat transfer coefficient given LMTD formula is defined as a measure of the efficiency of heat transfer in a heat exchanger, taking into account the logarithmic mean temperature difference and the heat transfer area. Overall Heat Transfer Coefficient is denoted by U symbol.

How to evaluate Overall heat transfer coefficient given LMTD using this online evaluator? To use this online evaluator for Overall heat transfer coefficient given LMTD, enter Heat exchanged (Q), Correction Factor (f), Area (A) & Logarithmic Mean Temperature Difference (ΔT_m) and hit the calculate button.

FAQs on Overall heat transfer coefficient given LMTD

What is the formula to find Overall heat transfer coefficient given LMTD?

The formula of Overall heat transfer coefficient given LMTD is expressed as Overall Heat Transfer Coefficient = Heat exchanged/(Correction Factor*Area*Logarithmic Mean Temperature Difference). Here is an example- 0.066667 = 50/(0.5*50*30).

How to calculate Overall heat transfer coefficient given LMTD?

With Heat exchanged (Q), Correction Factor (f), Area (A) & Logarithmic Mean Temperature Difference (ΔT_m) we can find Overall heat transfer coefficient given LMTD using the formula - Overall Heat Transfer Coefficient = Heat exchanged/(Correction Factor*Area*Logarithmic Mean Temperature Difference).

Can the Overall heat transfer coefficient given LMTD be negative?

Yes, the Overall heat transfer coefficient given LMTD, measured in Heat Transfer Coefficient can be negative.

Which unit is used to measure Overall heat transfer coefficient given LMTD?

Overall heat transfer coefficient given LMTD is usually measured using the Watt per Square Meter per Kelvin[W/m²*K] for Heat Transfer Coefficient. Watt per Square Meter per Celcius[W/m²*K], Joule per Second per Square Meter per Kelvin[W/m²*K], Kilocalorie (IT) per Hour per Square Foot per Celcius[W/m²*K] are the few other units in which Overall heat transfer coefficient given LMTD can be measured.

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Overall heat transfer coefficient given LMTD Formula

Overall heat transfer coefficient given LMTD Example

Overall heat transfer coefficient given LMTD Solution

Overall heat transfer coefficient given LMTD Formula Elements

Other formulas in Thermal Parameters of Heat Exchanger category

How to Evaluate Overall heat transfer coefficient given LMTD?

FAQs on Overall heat transfer coefficient given LMTD

Variable Name