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Heat Flow Rate through Composite Wall of 3 Layers in Series Formula

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Heat Flow Rate 3 Layer 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. Check FAQs

Q l3 = \frac{T i3 - T o3}{\frac{L 1}{k 1 \cdot A w3} + \frac{L 2}{k 2 \cdot A w3} + \frac{L 3}{k 3 \cdot A w3}}

Q_l3 - Heat Flow Rate 3 Layer?T_i3 - Inner Surface Temperature 3 Layer Wall?T_o3 - Outer Surface Temperature 3 Layer?L₁ - Length 1?k₁ - Thermal Conductivity 1?A_w3 - Area of 3 Layer Wall?L₂ - Length 2?k₂ - Thermal Conductivity 2?L₃ - Length 3?k₃ - Thermal Conductivity 3?

Heat Flow Rate through Composite Wall of 3 Layers in Series Example

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Here is how the Heat Flow Rate through Composite Wall of 3 Layers in Series equation looks like with Values.

Here is how the Heat Flow Rate through Composite Wall of 3 Layers in Series equation looks like with Units.

Here is how the Heat Flow Rate through Composite Wall of 3 Layers in Series equation looks like.

150 = \frac{300.75 - 300}{\frac{2}{1.6 \cdot 1383.3333} + \frac{5}{1.2 \cdot 1383.3333} + \frac{6}{4 \cdot 1383.3333}}

150W = \frac{300.75K - 300K}{\frac{2m}{1.6W/(m*K) \cdot 1383.3333m²} + \frac{5m}{1.2W/(m*K) \cdot 1383.3333m²} + \frac{6m}{4W/(m*K) \cdot 1383.3333m²}}

150 = \frac{300.75 - 300}{\frac{2}{1.6 \cdot 1383.3333} + \frac{5}{1.2 \cdot 1383.3333} + \frac{6}{4 \cdot 1383.3333}}

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Heat Flow Rate through Composite Wall of 3 Layers in Series Solution

Follow our step by step solution on how to calculate Heat Flow Rate through Composite Wall of 3 Layers in Series?

FIRST Step Consider the formula

Q l3 = \frac{T i3 - T o3}{\frac{L 1}{k 1 \cdot A w3} + \frac{L 2}{k 2 \cdot A w3} + \frac{L 3}{k 3 \cdot A w3}}

Next Step Substitute values of Variables

∴

Q l3 = \frac{300.75K - 300K}{\frac{2m}{1.6W/(m*K) \cdot 1383.3333m²} + \frac{5m}{1.2W/(m*K) \cdot 1383.3333m²} + \frac{6m}{4W/(m*K) \cdot 1383.3333m²}}

Next Step Prepare to Evaluate

∴

Q l3 = \frac{300.75 - 300}{\frac{2}{1.6 \cdot 1383.3333} + \frac{5}{1.2 \cdot 1383.3333} + \frac{6}{4 \cdot 1383.3333}}

Next Step Evaluate

∴

Q l3 = 149.999999638554W

LAST Step Rounding Answer

∴

Q l3 = 150W

Heat Flow Rate through Composite Wall of 3 Layers in Series Formula Elements

Variables

Heat Flow Rate 3 Layer

Heat Flow Rate 3 Layer 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_l3

Measurement: PowerUnit: W

Note: Value can be positive or negative.

Formulas to find Heat Flow Rate 3 Layer

Inner Surface Temperature 3 Layer Wall

Inner Surface Temperature 3 layer wall is the temperature at the inner surface of the wall (either plane wall or cylindrical wall or spherical wall, etc).

Symbol: T_i3

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Inner Surface Temperature 3 Layer Wall

Outer Surface Temperature 3 Layer

Outer Surface Temperature 3 layer is the temperature at the outer surface of the wall either plane wall or cylindrical wall or spherical wall, etc.

Symbol: T_o3

Measurement: TemperatureUnit: K

Note: Value can be positive or negative.

Formulas to find Outer Surface Temperature 3 Layer

Length 1

Length 1 is the length of the first body.

Symbol: L₁

Measurement: LengthUnit: m