Local Heat Transfer Resistance of Air-Film Calculator

✖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.ⓘ Heat Transfer Coefficient [h_ht]			+10% -10%
✖The area is the amount of two-dimensional space taken up by an object.ⓘ Area [A]			+10% -10%

✖Local Heat Transfer Resistance is the ratio of the temperature difference, dT, to the heat transfer Q. This is analogous to Ohm's law.ⓘ Local Heat Transfer Resistance of Air-Film [HT_Resistance]

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Local Heat Transfer Resistance of Air-Film Solution

STEP 0: Pre-Calculation Summary

Formula Used

Local Heat Transfer Resistance = 1/(Heat Transfer Coefficient*Area)
HT_Resistance = 1/(h_ht*A)
This formula uses 3 Variables

Variables Used

Local Heat Transfer Resistance - (Measured in Kelvin per Watt) - Local Heat Transfer Resistance is the ratio of the temperature difference, dT, to the heat transfer Q. This is analogous to Ohm's law.
Heat Transfer Coefficient - (Measured in Watt per Square Meter per Kelvin) - 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.
Area - (Measured in Square Meter) - The area is the amount of two-dimensional space taken up by an object.

STEP 1: Convert Input(s) to Base Unit

Heat Transfer Coefficient: 1.5 Watt per Square Meter per Kelvin --> 1.5 Watt per Square Meter per Kelvin No Conversion Required
Area: 0.05 Square Meter --> 0.05 Square Meter No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

HT_Resistance = 1/(h_ht*A) --> 1/(1.5*0.05)

Evaluating ... ...

HT_Resistance = 13.3333333333333

STEP 3: Convert Result to Output's Unit

13.3333333333333 Kelvin per Watt --> No Conversion Required

FINAL ANSWER

13.3333333333333 ≈ 13.33333 Kelvin per Watt <-- Local Heat Transfer Resistance

(Calculation completed in 00.004 seconds)

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University School of Chemical Technology-USCT (GGSIPU), New Delhi

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< Basics of Heat Transfer Calculators

Log Mean Temperature Difference for Counter Current Flow

LaTeX Go Log Mean Temperature Difference = ((Outlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)-(Inlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid))/ln((Outlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid)/(Inlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid))

Log Mean Temperature Difference for CoCurrent Flow

LaTeX Go Log Mean Temperature Difference = ((Outlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid)-(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid))/ln((Outlet Temperature of Hot Fluid-Outlet Temperature of Cold Fluid)/(Inlet Temperature of Hot Fluid-Inlet Temperature of Cold Fluid))

Logarithmic Mean Area of Cylinder

LaTeX Go Logarithmic Mean Area = (Outer Area of Cylinder-Inner Area of Cylinder)/ln(Outer Area of Cylinder/Inner Area of Cylinder)

Heat Transfer Coefficient based on Temperature Difference

LaTeX Go Heat Transfer Coefficient = Heat Transfer/Overall Temperature Difference

Local Heat Transfer Resistance of Air-Film Formula

LaTeX Go

Local Heat Transfer Resistance = 1/(Heat Transfer Coefficient*Area)
HT_Resistance = 1/(h_ht*A)

What is Heat Transfer?

Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy between physical systems. Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes.

Define Thermal Conductivity & Factors affecting it?

Thermal conductivity is defined as the ability of a substance to conduct heat. Factors Affecting The Thermal Conductivity are: Moisture, Density of material, Pressure, Temperature & Structure of material.

How to Calculate Local Heat Transfer Resistance of Air-Film?

Local Heat Transfer Resistance of Air-Film calculator uses Local Heat Transfer Resistance = 1/(Heat Transfer Coefficient*Area) to calculate the Local Heat Transfer Resistance, The Local Heat Transfer Resistance of Air-film formula is defined as the ratio of the temperature difference, dT to the heat transfer Q. This is analogous to Ohm's law, in which the electrical resistance is defined as the ratio of the voltage drop across a resistor to the current flow across the resistor. Local Heat Transfer Resistance is denoted by HT_Resistance symbol.

How to calculate Local Heat Transfer Resistance of Air-Film using this online calculator? To use this online calculator for Local Heat Transfer Resistance of Air-Film, enter Heat Transfer Coefficient (h_ht) & Area (A) and hit the calculate button. Here is how the Local Heat Transfer Resistance of Air-Film calculation can be explained with given input values -> 13.33333 = 1/(1.5*0.05).

FAQ

What is Local Heat Transfer Resistance of Air-Film?

The Local Heat Transfer Resistance of Air-film formula is defined as the ratio of the temperature difference, dT to the heat transfer Q. This is analogous to Ohm's law, in which the electrical resistance is defined as the ratio of the voltage drop across a resistor to the current flow across the resistor and is represented as HT_Resistance = 1/(h_ht*A) or Local Heat Transfer Resistance = 1/(Heat Transfer Coefficient*Area). 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 & The area is the amount of two-dimensional space taken up by an object.

How to calculate Local Heat Transfer Resistance of Air-Film?

The Local Heat Transfer Resistance of Air-film formula is defined as the ratio of the temperature difference, dT to the heat transfer Q. This is analogous to Ohm's law, in which the electrical resistance is defined as the ratio of the voltage drop across a resistor to the current flow across the resistor is calculated using Local Heat Transfer Resistance = 1/(Heat Transfer Coefficient*Area). To calculate Local Heat Transfer Resistance of Air-Film, you need Heat Transfer Coefficient (h_ht) & Area (A). With our tool, you need to enter the respective value for Heat Transfer Coefficient & Area 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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