Conduction, convection, and radiation, the overall heat transfer coefficient, the log mean temperature difference, and how these principles set up the later heat exchanger design module.
Every chemical process needs a stream heated, cooled, boiled, or condensed somewhere along its length, and exactly three physical mechanisms account for all of it: conduction through a stationary medium, convection between a surface and a moving fluid, and radiation across a temperature-dependent, fourth-power relationship. This module builds each mode from first principles, then shows how real equipment combines convective and conductive resistances in series into a single overall heat transfer coefficient, U.
By the end of this module you should be able to explain why the smallest film coefficient, not the largest, tends to control U, and why the log mean temperature difference — not a simple average — is the correct driving force in Q = UA·LMTD, the exact equation Module 9's heat exchanger design builds its full sizing procedure on.