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Data Description
| Data | Unit | Description | ||
| Set | Item | Type | Native | |
| Equipment Properties | Pressure | Pressure | psia | Discharge pressure (required). Must be greater than the second fluid inlet pressure and less than the motive stream's inlet pressure. |
| Isentropic Efficiency | Fraction or Percent | Fraction | Isentropic efficiency (typically 15 to 30%). | |
Equipment Properties
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Example of using equipment
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Method&Equations
The Steam_Ejector is an isentropic process. The momentum and kinetic energy of a high-velocity fluid is used to entrain and compress a second fluid stream.
The equation below is used to calculate the motive stream flow (W1):
Eff= (W2 (H2d-H2a))/ (W1 (H1a-H1d))
where:
Eff is the isentropic efficiency (typically 15 to 30%)
W1 is the motive stream flow
H1a is the motive stream enthalpy at inlet conditions
H1d is the motive stream enthalpy at the discharge pressure and inlet entropy.
W2 is the second fluid flow.
H2a is the second fluid enthalpy at inlet conditions.
H2d is the second fluid enthalpy at the discharge pressure and inlet entropy.
The inlet flow is the sum of the first and second outlet flows:
Inlet Flow=First Outlet Flow + Second Outlet Flow
Warnings
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Errors
Discharge pressure less than inlet pressure!