# Calculate Flow Dialog Box - Intergraph Smart 3D - Help

## Intergraph Smart 3D HVAC

PPMProduct
Intergraph Smart 3D
PPMCategory_custom
Help
Version_S3D
10.1(2014R1)

Provides a tool to perform the various flow rate estimations based on predefined processing in the software. This tool is not an HVAC analysis software. You use the Flow Calculator when you select duct size or confirm the flow rate of routed duct.

This dialog box provides three types of calculation methods. After you change the method, the input and output values change dynamically. After clicking the Calculate button with required input values, the software completes the calculation and displays the results on the dialog box.

Method

Organizes the possible options to use in the estimation. The input and output controls change dynamically, depending on the method that you select. Select one of the following methods:

• Flow rate and velocity >= diameter and loss per length - Serves as the default setting.

• Flow rate and loss per length >= diameter and velocity

• Flow rate and diameter >= velocity and loss per length

Calculation values

Organizes the values used in the estimation. The boxes under the Inputs heading contain the values that the algebraic equations use. In the Results column, the software displays the outcome of the equations.

Flow rate

Defines the flow rate to use in the estimation. In this context, flow rate is the quantity of fluid flowing per unit of time. Flow rate is used as input for all methods.

Velocity

Defines the velocity to use in the estimation. Velocity is used as input for the first method and used as output for the second and third methods.

Diameter

Defines the diameter to use in the estimation. Diameter is used as output for the first and second methods and used as input for the third method.

Press loss per length

Defines the loss of pressure in a length of a duct run. The value for Press loss per length is used as output for first method and third methods and used as input for the second method.

Shape conversion

Organizes the values that change the properties for a rectangular or flat oval feature during the estimation.

Rectangle

Displays a row of values used to estimate for a rectangular feature. The values include Width ratio (for each cross section based on the ratio of depth / width), Corner radius (of the rectangular cross section), Width (which is converted from the diameter), and Depth (which is converted from the diameter).

Flat oval

Displays a row of values used to estimate for a flat oval feature. The values include Width ratio (for each cross section based on the ratio of depth / width), Width (which is converted from the diameter), and Depth (which is converted from the diameter).

Calculate

Runs the equations based on the values that you have entered when you click this button.