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Heat exchanged Formula

GoHeat exchanged NTU method Formula

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

Q = f \cdot U \cdot A \cdot ΔT m

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

Heat exchanged Example

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Here is how the Heat exchanged equation looks like with Values.

Here is how the Heat exchanged equation looks like with Units.

Here is how the Heat exchanged equation looks like.

37500 = 0.5 \cdot 50 \cdot 50 \cdot 30

37500W = 0.5 \cdot 50W/m²*K \cdot 50m² \cdot 30

37500 = 0.5 \cdot 50 \cdot 50 \cdot 30

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Heat exchanged Solution

Follow our step by step solution on how to calculate Heat exchanged?

FIRST Step Consider the formula

Q = f \cdot U \cdot A \cdot ΔT m

Next Step Substitute values of Variables

∴

Q = 0.5 \cdot 50W/m²*K \cdot 50m² \cdot 30

Next Step Prepare to Evaluate

∴

Q = 0.5 \cdot 50 \cdot 50 \cdot 30

LAST Step Evaluate

∴

Q = 37500W

Heat exchanged Formula Elements

Variables

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

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

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 to find Heat exchanged

Go Heat exchanged NTU method

Q = ϵ \cdot C min \cdot (T1 - t1)

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 Overall heat transfer coefficient given LMTD

U = \frac{Q}{f \cdot A \cdot ΔT m}

Go Logarithmic mean temperature difference

ΔT m = \frac{Q}{f \cdot U \cdot A}

Go Entry temperature of cold fluid

t1 = T1 - (\frac{Q}{ϵ \cdot C min})

How to Evaluate Heat exchanged?

Heat exchanged evaluator uses Heat exchanged = Correction Factor*Overall Heat Transfer Coefficient*Area*Logarithmic Mean Temperature Difference to evaluate the Heat exchanged, The Heat exchanged formula is defined as the amount of heat transfer took place between the fluids in a heat exchanger. Heat exchanged is denoted by Q symbol.

How to evaluate Heat exchanged using this online evaluator? To use this online evaluator for Heat exchanged, enter Correction Factor (f), Overall Heat Transfer Coefficient (U), Area (A) & Logarithmic Mean Temperature Difference (ΔT_m) and hit the calculate button.

FAQs on Heat exchanged

What is the formula to find Heat exchanged?

The formula of Heat exchanged is expressed as Heat exchanged = Correction Factor*Overall Heat Transfer Coefficient*Area*Logarithmic Mean Temperature Difference. Here is an example- 37500 = 0.5*50*50*30.

How to calculate Heat exchanged?

With Correction Factor (f), Overall Heat Transfer Coefficient (U), Area (A) & Logarithmic Mean Temperature Difference (ΔT_m) we can find Heat exchanged using the formula - Heat exchanged = Correction Factor*Overall Heat Transfer Coefficient*Area*Logarithmic Mean Temperature Difference.

What are the other ways to Calculate Heat exchanged?

Here are the different ways to Calculate Heat exchanged-

Heat exchanged=Effectiveness of Heat Exchanger*Smaller Value*(Entry Temperature of Hot Fluid-Entry Temperature of Cold Fluid)

Can the Heat exchanged be negative?

Yes, the Heat exchanged, measured in Power can be negative.

Which unit is used to measure Heat exchanged?

Heat exchanged is usually measured using the Watt[W] for Power. Kilowatt[W], Milliwatt[W], Microwatt[W] are the few other units in which Heat exchanged can be measured.

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Heat exchanged Formula

​GoHeat exchanged NTU method Formula

Heat exchanged Example

Heat exchanged Solution

Heat exchanged Formula Elements

Other Formulas to find Heat exchanged

Other formulas in Thermal Parameters of Heat Exchanger category

How to Evaluate Heat exchanged?

FAQs on Heat exchanged

Variable Name

GoHeat exchanged NTU method Formula