Interactive Self-Study Module: Single-effect Evaporators

Overview:

This module uses screencasts and an interactive simulation to explain the behavior of a system that evaporates a liquid from a mixture of liquid and dissolved solids to create a more concentrated solution. Your retention of material in this module will increase if you write down reasons for your answers to ConcepTests, questions in screencasts, and questions to answer before using the interactive simulation(s), and you try to solve the example problems before watching the screencast solutions. We suggest using the learning resources in the following order:

  1. Attempt to answer the multiple choice ConcepTest and solve the example problem before watching the screencasts or working with the simulations.
  2. Watch the screencasts that describe single-effect evaporators, and answer the questions within the screencasts.
  3. Review important equations for single-effect evaporators.
  4. Use the interactive simulation(s) to further understand the behavior of single-effect evaporators.
  5. Try to solve the example problems before watching the solutions in the screencasts.
  6. Answer the ConcepTests.
  7. Look at the list of key points, but only after you try to list the key points yourself.
Motivation:
  • The concentration of solids in solution are increased in commercial systems by evaporation.
  • This module is intended for a separations course.
Before studying this module, you need to be able to:
After studying this module, you should be able to:
  • Solve mass balances for a single-effect evaporator.
  • Solve energy balances for a single-effect evaporator to determine flow rates of steam, flow rate of liquid feed that can be processed, flow rate of concentrated liquid leaving evaporator, and/or heat transfer area needed for desired evaporation rate.
  • Calculate steam economy.