Chapter 25. Humidification and Drying

Learning Objectives

After completing this chapter, you will be able to:

  • Understand the process of humidification and the simultaneous heat and mass transfer involved in that process.

  • Explain the basis of operation of a cooling tower.

  • Develop and solve simple models for sizing a cooling tower.

  • Understand different mechanisms for drying of a solid, the so-called constant rate versus falling rate periods.

  • Calculate the moisture content versus time during a batch drying process.

  • Examine the role of pore diffusion versus capillary flow in drying of solids.

Processes where simultaneous heat and mass transfer occur is common in chemical process industries. The simplest example is evaporation from a pool of water ...

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