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The thermal conductivity of a sheet of rigid, extrudedinsulationis reported to be

(a) What is the heat flux through a

(b) What is the rate of heat transfer through the sheet of insulation?

(a)

Heat Flux through a Sheet of insulation of dimension

## Answer to Problem 1.1P

Heat Flux through a Sheet of insulation of dimension

### Explanation of Solution

**Given:**

Thermal conductivity of insulation is

Thickness of Sheet is

Temperature difference through sheet is

Dimension of sheet is

**Concept used:**

Write the expression for heat flux passing through the sheet of insulation.

Here,

**Calculation:**

Substitute

**Conclusion:**

Thus, heat Flux through a Sheet of insulation of dimension

(b)

Rate of heat transfer through sheet of insulation.

## Answer to Problem 1.1P

Rate of heat transfer through sheet of insulation is

### Explanation of Solution

**Concept used:**

Calculate the area of rectangular sheet as follows:

Write the expression for rate of heat transfer.

**Calculation:**

Substitute

**Conclusion:**

Thus, rate of heat transfer through sheet of insulation is

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# Chapter 1 Solutions

Fundamentals of Heat and Mass Transfer

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