# Data Entry - Knock Out Pot

The data entry requirement for a knock-out pot is shown below. Figure 1: Data Entry for a Knock-Out Pot . Unique Name: Allows you to enter a descriptive name for this element. It is not necessary to add any data to this field. If you do enter data here you can use this later to sort via the Lists. Status: For knock-out pots there are 3 possible status values: On, Off, or Ignore Pressure Loss. On is the normal position and tells the application that this node is open and to calculate the flow out of the element. Off means that this component is closed to flow. You can close resistances to isolate part of a network. Ignore Pressure Loss means that the node is Open but the pressure loss calculation is skipped. Elevation: This is the height above a selected datum. You can select any datum (base line with elevation = 0) that is convenient for you. When you construct any network you need to decide on a datum. This can typically be ground level, or the centerline of a pump. In flow calculations absolute elevations are not important, only the relative elevations of the nodes are important. The elevation that you enter in this row is the elevation of the connector measured from the datum. Elevation Unit: The unit of length that defines the elevation that you have entered into the elevation row. Pressure Model: The options for this entry are: 1) Auto Calculate and 2) Fixed Pressure. If you accept the default selection (Auto Calculate), the software will automatically determine the pressure at the separator. This also represents the pressure at the outlet of the two phase pipe serving the separator. Note, the continuity equations (mass, energy & momentum) are solved on this basis. If you select Fixed Pressure for the pressure model, additional data entry is required as per Figure 2. Figure 2: Data Entry for Fixed Pressure - Pressure Model. Operating Pressure: This is the design pressure defined for the separator by the designer. This also represents the pressure at the outlet of the two phase pipe serving the separator. Note, the continuity equations (mass, energy & momentum) are solved on this basis. Pressure Unit: This is the pressure unit that you use when defining the operating pressure for the separator. Flash Calculation: FluidFlow allows the user to define isenthalpic flashing (constant enthalpy) for the knock-out pot. Liquid Out (RED): The assigned liquid outlet for the knock-out pot. This is defined in FluidFlow by the " Red Dot". Refer to Fig. 3 below for an illustration of the liquid outlet. Vapor Out (YELLOW): The assigned vapor outlet for the knock-out pot. This is defined in FluidFlow by the " Yellow Dot". Refer to Fig. 3 below for an illustration of the liquid outlet. Figure 3: Knock-Out Pot Pipe Connections. User-Defined Fields: Allows you to add "fields" to the element, for use in, for example, scripting or reporting. Clicking on the input will display the User-Defined Fields dialog to add/edit/delete fields. Properties On Flowsheet: This value can either be: Show; or Hide. The Properties on Flowsheet row is available for all components. This means that you can decide what properties you wish to show on the flowsheet and for which components. If Show is selected then additional rows appear in the Input Editor, which allow you to set text font, color, size, text position and the properties you wish to display. The additional rows are shown in Figure 4: Figure 4: Additional input data required for showing properties on the flowsheet. Alignment: This row controls the alignment of the component properties on-screen. Possible values are: Top; Bottom; Left; or Right. Alignment of the displayed text is relative to the center of the component. Font: Text font properties can be set from the standard windows font dialog. Properties: Shows/hides Input and Result fields for display of properties on flowsheet. This allows for visibility of any input or calculated/result data to be controlled for each component. Individual property setting is made via the Select Element Properties dialog.