Radiative Heat Transfer

Radiative Heat Transfer Course Work 2011:

Description of caper Assigned

A room may be heated by using a large radiator, a heated bedeck or a heated ceiling. The room course characterization the relative position is shown in the figures below.

Figure 1: populate Configuration

Figure 2: Notation

The table below summarises the room configuration as well as the given values of temperature and emissivities associated with the features of the room.

| determine |Feature |Temperature/°c |Emissivities |
|1 |Wall |23 |0.8 |
|2 |Wall |23 |0.8 |
|3 |Wall |23 |0.8 |
|4 |Wall |23 |0.8 |
|5 |Radiator |75 |0.8 |
|6 |Windows |8 |0.6 |
|7 |Wall |23 |0.8 |
|8 |Wall |23 |0.



8 |
|9 |Floor |20 |0.9 |
|10 |Ceiling |15 |0.7 |

By utilising the given information, calculations atomic number 18 to be carried out to interpret the value of heat transfer at the window, positioned at 6. To do this, the equating below needs to be puzzle out.

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This is to be solved by setting up a matrix equation in the form of

[M][J] = [S]

Where [M] is a square matrix and its elements are given by

[pic]

Derivation of Configuration Factors

12-56, 12-78, 34-56 and 34-78

A12F12-56 = A1F1-6 + A1F1-5 + A2F2-5 + A2F2-6

For F12-56, X = 4, Y = 3, Z = 6

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From Figure 5.4 (Notes),

F12-56 = 0.26

For F1-5, X = 2, Y = 3, Z = 6

[pic]

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From figure 5.4 (Notes),

F1-5 = 0.218...If you emergency to get a full essay, order it on our website: Orderessay



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