Thermal Resistance of Composite Wall with 3 Layers in Series Solution

STEP 0: Pre-Calculation Summary
Formula Used
Thermal Resistance of 3 Layer = Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall)
Rth3 = L1/(k1*Aw3)+L2/(k2*Aw3)+L3/(k3*Aw3)
This formula uses 8 Variables
Variables Used
Thermal Resistance of 3 Layer - (Measured in Kelvin per Watt) - Thermal resistance of 3 layer is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow.
Length 1 - (Measured in Meter) - Length 1 is the length of the first body.
Thermal Conductivity 1 - (Measured in Watt per Meter per K) - Thermal Conductivity 1 is the thermal conductivity of the first body.
Area of 3 Layer Wall - (Measured in Square Meter) - Area of 3 Layer Wall refers to the surface area of the wall, which is the total amount of space that it occupies. It is typically measured in square units such as square feet or square meters.
Length 2 - (Measured in Meter) - Length 2 is the length of the second body/object/section.
Thermal Conductivity 2 - (Measured in Watt per Meter per K) - Thermal Conductivity 2 is the thermal conductivity of the second body.
Length 3 - (Measured in Meter) - Length 3 is the length of the third body/object/section.
Thermal Conductivity 3 - (Measured in Watt per Meter per K) - Thermal Conductivity 3 is the thermal conductivity of the third body.
STEP 1: Convert Input(s) to Base Unit
Length 1: 2 Meter --> 2 Meter No Conversion Required
Thermal Conductivity 1: 1.6 Watt per Meter per K --> 1.6 Watt per Meter per K No Conversion Required
Area of 3 Layer Wall: 1383.33333 Square Meter --> 1383.33333 Square Meter No Conversion Required
Length 2: 5 Meter --> 5 Meter No Conversion Required
Thermal Conductivity 2: 1.2 Watt per Meter per K --> 1.2 Watt per Meter per K No Conversion Required
Length 3: 6 Meter --> 6 Meter No Conversion Required
Thermal Conductivity 3: 4 Watt per Meter per K --> 4 Watt per Meter per K No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
Rth3 = L1/(k1*Aw3)+L2/(k2*Aw3)+L3/(k3*Aw3) --> 2/(1.6*1383.33333)+5/(1.2*1383.33333)+6/(4*1383.33333)
Evaluating ... ...
Rth3 = 0.00500000001204819
STEP 3: Convert Result to Output's Unit
0.00500000001204819 Kelvin per Watt --> No Conversion Required
FINAL ANSWER
0.00500000001204819 0.005 Kelvin per Watt <-- Thermal Resistance of 3 Layer
(Calculation completed in 00.020 seconds)

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3 Layers Calculators

Heat Flow Rate through Composite Wall of 3 Layers in Series
​ LaTeX ​ Go Heat Flow Rate 3 Layer = (Inner Surface Temperature 3 Layer Wall-Outer Surface Temperature 3 Layer)/(Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall))
Outer Surface Temperature of Composite Wall of 3 Layers for Conduction
​ LaTeX ​ Go Outer Surface Temperature 3 Layer = Inner Surface Temperature 3 Layer Wall-Heat Flow Rate 3 Layer*(Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall))
Inner Surface Temperature of Composite Wall of 3 Layers in Series
​ LaTeX ​ Go Inner Surface Temperature 3 Layer Wall = Outer Surface Temperature 3 Layer+Heat Flow Rate 3 Layer*(Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall))
Thermal Resistance of Composite Wall with 3 Layers in Series
​ LaTeX ​ Go Thermal Resistance of 3 Layer = Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall)

Thermal Resistance of Composite Wall with 3 Layers in Series Formula

​LaTeX ​Go
Thermal Resistance of 3 Layer = Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall)
Rth3 = L1/(k1*Aw3)+L2/(k2*Aw3)+L3/(k3*Aw3)

What is thermal resistance?

Thermal resistance is a heat property and a measurement of a temperature difference by which an object or material resists a heat flow. Thermal resistance is the reciprocal of thermal conductance.

How to Calculate Thermal Resistance of Composite Wall with 3 Layers in Series?

Thermal Resistance of Composite Wall with 3 Layers in Series calculator uses Thermal Resistance of 3 Layer = Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall) to calculate the Thermal Resistance of 3 Layer, The Thermal Resistance of Composite Wall with 3 Layers in Series formula is defined as the total thermal resistance of a 3-layered composite wall, with the walls placed in series. Thermal Resistance of 3 Layer is denoted by Rth3 symbol.

How to calculate Thermal Resistance of Composite Wall with 3 Layers in Series using this online calculator? To use this online calculator for Thermal Resistance of Composite Wall with 3 Layers in Series, enter Length 1 (L1), Thermal Conductivity 1 (k1), Area of 3 Layer Wall (Aw3), Length 2 (L2), Thermal Conductivity 2 (k2), Length 3 (L3) & Thermal Conductivity 3 (k3) and hit the calculate button. Here is how the Thermal Resistance of Composite Wall with 3 Layers in Series calculation can be explained with given input values -> 0.005 = 2/(1.6*1383.33333)+5/(1.2*1383.33333)+6/(4*1383.33333).

FAQ

What is Thermal Resistance of Composite Wall with 3 Layers in Series?
The Thermal Resistance of Composite Wall with 3 Layers in Series formula is defined as the total thermal resistance of a 3-layered composite wall, with the walls placed in series and is represented as Rth3 = L1/(k1*Aw3)+L2/(k2*Aw3)+L3/(k3*Aw3) or Thermal Resistance of 3 Layer = Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall). Length 1 is the length of the first body, Thermal Conductivity 1 is the thermal conductivity of the first body, Area of 3 Layer Wall refers to the surface area of the wall, which is the total amount of space that it occupies. It is typically measured in square units such as square feet or square meters, Length 2 is the length of the second body/object/section, Thermal Conductivity 2 is the thermal conductivity of the second body, Length 3 is the length of the third body/object/section & Thermal Conductivity 3 is the thermal conductivity of the third body.
How to calculate Thermal Resistance of Composite Wall with 3 Layers in Series?
The Thermal Resistance of Composite Wall with 3 Layers in Series formula is defined as the total thermal resistance of a 3-layered composite wall, with the walls placed in series is calculated using Thermal Resistance of 3 Layer = Length 1/(Thermal Conductivity 1*Area of 3 Layer Wall)+Length 2/(Thermal Conductivity 2*Area of 3 Layer Wall)+Length 3/(Thermal Conductivity 3*Area of 3 Layer Wall). To calculate Thermal Resistance of Composite Wall with 3 Layers in Series, you need Length 1 (L1), Thermal Conductivity 1 (k1), Area of 3 Layer Wall (Aw3), Length 2 (L2), Thermal Conductivity 2 (k2), Length 3 (L3) & Thermal Conductivity 3 (k3). With our tool, you need to enter the respective value for Length 1, Thermal Conductivity 1, Area of 3 Layer Wall, Length 2, Thermal Conductivity 2, Length 3 & Thermal Conductivity 3 and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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