Single-phase flow regimes in a multistage flash evaporator stage
Single-phase flows in a mockup flash evaporator stage were characterized in terms of three possible flow regimes: shooting, jump, or submerged flows. It was found that in the first two regimes liquid flow rates depended only upon upstream liquid level, interstage pressure difference, and orifice opening. These data could be correlated by plotting orifice Froude number versus the ratio of upstream level to orifice opening for constant values of the pressure difference-orifice opening ratio. For submerged flows an additional parameter, the downstream liquid level, was found to be important, and the data for this regime were fitted to a three-variable least-squares quadratic polynomial with a standard error of 4.5 percent. Analytical correlation of flow rate data was frustrated by uncertainties in the experimental magnitudes of contraction coefficients and energy losses, to which the liquid flow rates were extremely sensitive.
- Research Organization:
- Massachusetts Inst. of Tech., Oak Ridge, TN (USA). School of Chemical Engineering Practice
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 7323533
- Report Number(s):
- ORNL-MIT-94
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420200* -- Engineering-- Facilities
Equipment
& Techniques
420400 -- Engineering-- Heat Transfer & Fluid Flow
DEMINERALIZATION
DESALINATION
DUAL-PURPOSE POWER PLANTS
EVAPORATION
EVAPORATORS
FLASHING
FLUID FLOW
HYDROGEN COMPOUNDS
LIQUID FLOW
OXYGEN COMPOUNDS
PERFORMANCE
PHASE TRANSFORMATIONS
POWER PLANTS
SEAWATER
SEPARATION PROCESSES
WATER
420200* -- Engineering-- Facilities
Equipment
& Techniques
420400 -- Engineering-- Heat Transfer & Fluid Flow
DEMINERALIZATION
DESALINATION
DUAL-PURPOSE POWER PLANTS
EVAPORATION
EVAPORATORS
FLASHING
FLUID FLOW
HYDROGEN COMPOUNDS
LIQUID FLOW
OXYGEN COMPOUNDS
PERFORMANCE
PHASE TRANSFORMATIONS
POWER PLANTS
SEAWATER
SEPARATION PROCESSES
WATER