Transport Processes and Separation Process Principles (Includes Unit Operations) Fourth Edition

4.11. ADVANCED RADIATION HEAT-TRANSFER PRINCIPLES

4.11A. Introduction and Radiation Spectrum

1. Introduction

This section will cover some basic principles together with some advanced topics on radiation that were not covered in Section 4.10. The exchange of radiation between two surfaces depends upon the size, shape, and relative orientation of these two surfaces and also upon their emissivities and absorptivities. In the cases to be considered the surfaces are separated by nonabsorbing media such as air. When gases such as CO₂ and H₂O vapor are present, some absorption by the gases occurs, which is not considered until later in this section.

2. Radiation spectrum and thermal radiation

Energy can be transported in the form of electromagnetic ...