135 SOLVED PROBLEMS

Question: 10.7

## What fraction of incident solar radiation is absorbed by a thick layer of CO2 at 10 atm and 830 K? Use the approximate absorption bands of Example 10.5. ...

The effective radiating temperature of the sun is ...
Question: 7.11

## The fin temperature distribution in the array of fins in Figure 7.9 is considered in Example 7.5 and is governed by the dimensionless energy equation (Equation 7.11b) ...

To proceed with the solution of Equation 7.37, the...
Question: 5.17

## Figure 5.14 is a two-dimensional rectangular enclosure that is long in the direction normal to the cross section shown. ...

The configuration factors are obtained by the cros...
Question: 6.5

## Two parallel isothermal plates of infinite length and finite width L are arranged as shown in Figure 6.8a. The upper plate is black, while the lower is a highly reflective gray material with parallel deep grooves of open angle 1° in its surface extending along ...

In Howell and Perlmutter (1963), the directional e...
Question: 10.5

## Parallel plane nongray walls are D = 2.5 cm apart and are at uniform temperatures T1 = 1100 K and T2 = 550 K. Pure CO2 gas at 10-atm pressure and Tg = 550 K is between the walls. The ...

In Example 10.3 the spectral exchange was found fo...
Question: 6.13

## A cylindrical cavity open at one end has a specularly reflecting cylindrical wall and base (Figure 6.28a). Determine the fraction of radiation from ring element dX1 that reaches dX by means of one reflection from the base with reflectivity ρs,1 and one reflection from the cylindrical wall with ...

As shown in Figure 6.28b, for this geometry the re...
Question: 5.16

## The second half of Example 5.14 is now calculated by using Equation 5.35. A1 and A2 have specified T, while A4 and A5 have specified q. Then Equation 5.35 yields ...

J_1-(1-\epsilon _1)[F_{1-2}J_2+F_{1-4}J_4+F...
Question: 13.4

## A plane layer of radiating and isotropically scattering medium with constant thermal conductivity k, constant radiative properties, optical thickness τD, and albedo ω is between infinite parallel ...

With conduction, radiation, and internal heat gene...
Question: 13.3