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Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film Formula

GoHeat Transfer Coefficient based on Temperature Difference Formula

GoHeat Transfer from Stream of Gas flowing in Turbulent Motion Formula

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The Heat Transfer Coefficient is the heat transferred per unit area per kelvin. Thus area is included in the equation as it represents the area over which the transfer of heat takes place. Check FAQs

h ht = \frac{1}{(A) \cdot HT Resistance}

h_ht - Heat Transfer Coefficient?A - Area?HT_Resistance - Local Heat Transfer Resistance?

Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film Example

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Here is how the Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film equation looks like with Values.

Here is how the Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film equation looks like with Units.

Here is how the Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film equation looks like.

1.5004 = \frac{1}{(0.05) \cdot 13.33}

1.5004W/m²*K = \frac{1}{(0.05m²) \cdot 13.33K/W}

1.5004 = \frac{1}{(0.05) \cdot 13.33}

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Heat Transfer » fx Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film

Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film Solution

Follow our step by step solution on how to calculate Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film?

FIRST Step Consider the formula

h ht = \frac{1}{(A) \cdot HT Resistance}

Next Step Substitute values of Variables

∴

h ht = \frac{1}{(0.05m²) \cdot 13.33K/W}

Next Step Prepare to Evaluate

∴

h ht = \frac{1}{(0.05) \cdot 13.33}

Next Step Evaluate

∴

h ht = 1.50037509377344W/m²*K

LAST Step Rounding Answer

∴

h ht = 1.5004W/m²*K

Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film Formula Elements

Variables

Heat Transfer Coefficient

The Heat Transfer Coefficient is the heat transferred per unit area per kelvin. Thus area is included in the equation as it represents the area over which the transfer of heat takes place.

Symbol: h_ht

Measurement: Heat Transfer CoefficientUnit: W/m²*K

Note: Value can be positive or negative.

Formulas to find 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

Local Heat Transfer Resistance

Local Heat Transfer Resistance is the ratio of the temperature difference, dT, to the heat transfer Q. This is analogous to Ohm's law.

Symbol: HT_Resistance

Measurement: Thermal ResistanceUnit: K/W

Note: Value should be greater than 0.

Formulas to find Local Heat Transfer Resistance

Other Formulas to find Heat Transfer Coefficient

Go Heat Transfer Coefficient based on Temperature Difference

h ht = \frac{q}{ΔT Overall}

Go Heat Transfer from Stream of Gas flowing in Turbulent Motion

h ht = \frac{16.6 \cdot c p \cdot {(G)}^{0.8}}{D^{0.2}}

Other formulas in Basics of Heat Transfer category

Go Log Mean Temperature Difference for CoCurrent Flow

LMTD = \frac{(T ho - T co) - (T hi - T ci)}{\ln (\frac{T ho - T co}{T hi - T ci})}

Go Log Mean Temperature Difference for Counter Current Flow

LMTD = \frac{(T ho - T ci) - (T hi - T co)}{\ln (\frac{T ho - T ci}{T hi - T co})}

Go Logarithmic Mean Area of Cylinder

A mean = \frac{A o - A i}{\ln (\frac{A o}{A i})}

Go Hydraulic Radius

r H = \frac{A cs}{P}

How to Evaluate Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film?

Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film evaluator uses Heat Transfer Coefficient = 1/((Area)*Local Heat Transfer Resistance) to evaluate the Heat Transfer Coefficient, The Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film formula is defined as inverse of the product of area of heat transfer and local heat transfer resistance. The convective heat transfer coefficient depends on the fluid’s physical properties and the physical situation. The convective heat transfer coefficient is not a property of the fluid. It is an experimentally determined parameter whose value depends on all the variables influencing convection, such as the surface geometry, the nature of fluid motion, the properties of the fluid, and the bulk fluid velocity. Typically, the convective heat transfer coefficient for laminar flow is relatively low compared to the convective heat transfer coefficient for turbulent flow. This is due to turbulent flow having a thinner stagnant fluid film layer on the heat transfer surface. Heat Transfer Coefficient is denoted by h_ht symbol.

How to evaluate Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film using this online evaluator? To use this online evaluator for Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film, enter Area (A) & Local Heat Transfer Resistance (HT_Resistance) and hit the calculate button.

FAQs on Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film

What is the formula to find Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film?

The formula of Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film is expressed as Heat Transfer Coefficient = 1/((Area)*Local Heat Transfer Resistance). Here is an example- 0.921659 = 1/((0.05)*13.33).

How to calculate Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film?

With Area (A) & Local Heat Transfer Resistance (HT_Resistance) we can find Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film using the formula - Heat Transfer Coefficient = 1/((Area)*Local Heat Transfer Resistance).

What are the other ways to Calculate Heat Transfer Coefficient?

Here are the different ways to Calculate Heat Transfer Coefficient-

Heat Transfer Coefficient=Heat Transfer/Overall Temperature Difference
Heat Transfer Coefficient=(16.6*Specific Heat Capacity*(Mass Velocity)^0.8)/(Internal Diameter of Pipe^0.2)

Can the Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film be negative?

Yes, the Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film, measured in Heat Transfer Coefficient can be negative.

Which unit is used to measure Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film?

Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film 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 Heat Transfer Coefficient given Local Heat Transfer Resistance of Air Film can be measured.

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