Variable

Default Value

Range

● Steam Input Stream Name
The name of the stream that is connected to the input port for steam.

<none>

Dedicated Input Port

○ Heating Agent Name
Indicates the heating agent used in the evaporator. Click on the list box to bring up a list of available heating agents in order to select one.

Steam

Any Heating Agent

● Supply Temp. of Heating Agent (^oC)
The temperature at which the heating agent is supplied from the utility plant to the evaporator.

152.0

Positive

● Return Temp. of Heating Agent (^oC)
The temperature at which the condensed heating agent returns to the utility plant from the evaporator.

152.0

Positive

● Mass-to-Energy Factor of Heating Agent (kcal/kg)
The specific heat source of the heating agent between supply and return.

503.683

Positive

● Duty of Heating Agent (kcal/h)
The heat transfer rate of the heating agent.

0.0

Positive

● Flow of Heating Agent (kg/h)
The mass flow rate of the heating agent.

0.0

Positive

○ Same Properties As Recompressed Vapor?
Check this box to indicate that the thermodynamic properties of the mixed steam in the heating space of the first effect can be calculated the same way that the properties of recompressed vapor are calculated (i.e., either based on the built-in steam calculator or based on pure component properties, depending on whether the “Calculated for Steam Using Steam Calculator” option is selected or not through the “Effects” tab,). If the “Use Steam Input Stream” option is selected, this option is checked and disabled, by default.

<Yes>

Yes/No

● Flow of Mixed steam in Heating Space of First Effect (kg/h)
The mass flow rate of the mixed steam in the heating space of the first effect.

0.0

Positive

◙ Pressure of Mixed Steam in Heating Space of First Effect (bar)
The pressure of the mixed steam in the heating space of the first effect.

1.013

Positive

◙ Saturation Temp. of Mixed Steam in Heating Space of First Effect (^oC)
The saturation temperature of mixed steam at the specified pressure in the heating space of the first effect.

152.0

Positive

◙ Outlet Temp. of Mixed Steam from Heating Space of First Effect (^oC)
The temperature of condensed mixed steam leaving the heating space of the first effect. If a heating agent is used to represent the mixed steam in the heating space of the first effect (i.e., the “Use Heating Agent” option is selected), the outlet temperature of mixed steam from the heating space of the first effect is automatically set to match the heating agent’s return temperature.

152.0

Positive

● Specific Inlet Enthalpy of Mixed Steam in Heating Space of First Effect (kcal/kg)
The total enthalpy of the inlet steam, recompressed vapor and desuperheating agent (optional) at the heating space inlet of the first effect divided by their total mass flow rate.

0.0

Positive

◙ Specific Outlet Enthalpy of Mixed Steam in Heating Space of First Effect (kcal/kg)
The specific enthalpy of the condensed mixed steam at the heating space outlet of the first effect.

152.0

[Supply Temp., Return Temp.]

● Specific Heat Duty of Mixed Steam in Heating Space of First Effect (kcal/kg)
The difference between the specific inlet and outlet enthalpies of the mixed steam in the heating space of the first effect.

152.0

Positive

○ Recompressed % Set By User?
Check this box in order to set the recompressed % of vapor from the last effect.

<No>

Yes/No

◙ Recompressed % (% of Vapor from Last Effect)
The percentage of vapor produced in the last effect that is drawn from the vapor outlet of that effect, recompressed by mechanical compression, and sent back to the steam chest of the first effect.

0.0

[0,100)

● Flow of Vapor in Compressor (kg/h)
The mass flow rate of recompressed vapor.

0.0

Positive

● Inlet Pressure of Vapor in Compressor (bar)
The pressure of vapor at the inlet of the compressor (same as the pressure of vapor in the last effect).

1.013

Positive

● Inlet Density of Vapor in Compressor (g/L)
The density of vapor at the inlet of the compressor.

0.0

Positive

● Outlet Pressure of Vapor in Compressor (bar)
The pressure of vapor at the outlet of the compressor.

1.013

Positive

○ Specific Heat Ratio of Vapor in Compressor Set By User?
Check this box in order to set the specific heat ratio of vapor in the compressor.

No

Yes/No

◙ Specific Heat Ratio of Vapor in Compressor
The ratio Cp/Cv for the vapor in the compressor, where Cp is the specific heat capacity of vapor at constant pressure and Cv is the specific heat capacity at constant volume.

0.0

Positive

○ Isentropic Efficiency of Compression (%)
The efficiency of isentropic mechanical compression.

100.0

(0,100]

● Compression Work (kcal/kg)
The specific enthalpy change of vapor by mechanical compression.

0.0

Positive

○ Use Desuperheating Agent?
Check this box to specify a cooling agent that will be used as a desuperheating agent added to the mixture of heating agent and recompressed vapor. By default, this option is unchecked and disabled when the “Use Steam Input Stream” option is selected.

No

Yes/No

○ Desuperheating Agent Name
Indicates the desuperheating agent used in the evaporator. Click on the list box to bring up a list of available cooling agents in order to select one as desuperheating agent.

Cooling Water

Any Cooling Agent

● Supply Temp. of Desuperheating Agent (^oC)
The temperature at which the desuperheating agent is supplied from the utility plant to the evaporator.

25.0

Positive

● Return Temp. of Desuperheating Agent (^oC)
The temperature at which the desuperheating agent is returned from the evaporator to the utility plant.

30.0

Positive

● Mass-to-Energy Factor of Desuperheating Agent (kcal/kg)
The difference in the specific enthalpies of the desuperheating agent between the supply and return points.

4.997

Positive

● Duty of Desuperheating Agent (kcal/h)
The heat transfer rate of the desuperheating agent.

0.0

Positive

● Flow of Desuperheating Agent (kg/h)
The mass flow rate of the desuperheating agent.

0.0

Positive