An Effectiveness--Number of Transfer Units Relationship for Evaporators With Non-negligible Boiling Point Elevation Increases
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An effectiveness number of transfer units (ε–NTU) model is developed for use in evaporators where the evaporating stream: (1) comprises a volatile solvent and nonvolatile solute(s) and (2) undergoes a significant, but linear change in boiling point elevation (BPE) with increasing solute molality. The model is applicable to evaporators driven by an isothermal stream (e.g., steam-driven or refrigerant-driven) in parallel flow, counterflow, and crossflow configurations where the evaporating stream is mixed. The model is of use in a variety of process engineering applications as well as the sizing and rating of evaporators in high-salinity desalination systems.
Date issued
2016-08Department
Massachusetts Institute of Technology. Department of Mechanical Engineering; Rohsenow Kendall Heat Transfer Laboratory (Massachusetts Institute of Technology)Journal
Journal of Heat Transfer
Publisher
American Society of Mechanical Engineers (ASME)
Citation
Thiel, Gregory P., and John H. Lienhard. “An Effectiveness–Number of Transfer Units Relationship for Evaporators With Non-Negligible Boiling Point Elevation Increases.” Journal of Heat Transfer 138, no. 12 (August 2, 2016): 121801. © 2016 ASME.
Version: Final published version
ISSN
0022-1481
1528-8943