Variable

Default Value

Range

○ Flow Available in Stream?
Note that this option is available only if the “Use Steam Input Stream” option is selected. If checked, the program will calculate the volatile component evaporation fractions based on the available steam input stream mass flow rate. If not checked (default), the program will calculate the required steam input stream mass flowrate based on the evaporation specifications in the “Oper. Cond’s” tab.

No

Yes/No

● 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

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

0.0

Positive

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

0.0

Positive

○ Specify Condensate Subcooling?
Check this option to manually specify a subcooling temperature for the outlet temperature of condensed steam from the heating space of the first effect. If this option is not checked, the condensate outlet temperature is automatically set equal to the saturation temperature of steam in the heating space of the first effect.

No

Yes/No

● Flow of Steam in Heating Space of First Effect (kg/h)
The mass flow rate of the steam in the heating space of the first effect. If a heating agent is used to represent the inlet steam (i.e., the “Use Heating Agent” option is selected), this is the same as the mass flow rate of the heating agent.

0.0

Positive

◙ Saturation Temp. of Steam in Heating Space of First Effect (^oC)
The saturation temperature of steam at the assumed steam pressure in the heating space of the first effect. If a heating agent having equal supply and return temperatures is used to represent the inlet steam (i.e., the “Use Heating Agent” option is selected), the saturation temperature of steam in the heating space of the first effect matches the heating agent’s supply or return temperature.

152.0

Positive

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

152.0

Positive

● Specific Heat Duty of Steam in Heating Space of First Effect (kcal/kg)
The specific heat transfer rate of steam in the heating space of the first effect (the difference between the specific enthalpy of steam at the heating space inlet and the specific enthalpy of steam at the heating space outlet). If a heating agent is used to represent the steam in the heating space of the first effect (i.e., the “Use Heating Agent” option is selected), the specific heat duty of steam is the same as the heating agent’s mass-to-energy factor.

0.0

Positive