Single-effect Evaporators: Interactive Simulations and Digital Experiment
The first simulation and the optional digital experiment play directly in a browser. The optional simulation was prepared using Mathematica and can be viewed using the free Wolfram player. Try to predict the behavior when a parameter changes before changing that parameter.
Single-Effect Evaporation
Try to answer these questions before determining the answer with the simulation. We suggest that you write down the reasons for your answers.
- As the feed flow rate to a single-effect evaporator increases, how does the flow rate of evaporated water change? Why?
- As the feed pressure and temperature increase so the feed to a single-effect evaporator remains a saturated liquid, how does the flow rate of evaporated water change? Why?
Single-Effect Evaporator Digital Experiment (optional)
This Demonstration calculates the amount of concentrate and vapor produced by a single-stage evaporator from a given amount of feed. The adjustable parameters are the feed’s mass or mass flow rate and the concentrations of the feed and concentrate expressed as mass fractions on a wet basis.
Try to answer these questions before determining the answer with the simulation. We suggest that you write down the reasons for your answers.
- For a single-effect evaporator used to concentrate a solute in water, as the weight fraction of solute in the feed increases (for a given mass feed rate), does the mass flow rate of the vapor increase or decrease if the solute concentration in the outlet stream remains the same?
- For a fixed feed, if the solute concentration in the outlet stream doubles, how does the flow rate of the vapor stream change? Does it double, more than double, or less than double?