HVAC - Intergraph Smart 3D - Help

Intergraph Smart 3D HVAC

PPMProductFamily
3D Design and Visualization
PPMProduct
Intergraph Smart 3D
PPMCategory
Help
Version_S3D
12.x(2018)

The HVAC task creates a three-dimensional representation, or model, of a distributed system so that you can create a fully rendered 3-D model of various duct systems. You use a combination of parts and features, objects that define the geometry and design intent of a run, to model the duct runs that comprise the duct system. In the software hierarchy, a feature is a child to a run and a parent to a part. Features are not displayed in the Workspace Explorer because of their ability to own several parts. In addition to duct modeling commands, the HVAC task provides a command for creating spools. Start this task by clicking Tasks > HVAC.

The following illustration shows the relationships between the pieces of a duct system.

Duct Systems

A duct system is a way of organizing duct runs within the system hierarchy and controlling the specifications that can be used within that system. If a duct system exists in your model, you can route duct runs and arrange the duct runs as children in the system hierarchy.

Duct Runs

A duct run is a collector of features and parts, and is typically a child of a duct system in the Workspace Explorer. It also provides the Catalog specification from which you can choose the parts. Duct run is a duct path with the same specification, material, and values of maximum recommended velocity and pressure loss.

Duct Features

A duct feature is a modeled portion of a duct run consisting of one or more parts. Examples include a turn or a branch. Duct modeling features add functional capabilities to your duct run. You create them during the routing process by inserting splits and components to meet design needs or constraints. By placing such objects during the routing process, the software presents a more accurate model of the final design, without needless, extensive editing of the duct system. The duct features are not listed in Workspace Explorer.

During routing, you select the needed command and the software immediately suspends routing while determining the properties and placement of the feature. When the feature is finished, the software returns to the routing process. You can also insert features after the route is completed. After you draw a duct run, you can mouse hover on various features and a tooltip shows the feature type. If you select the feature, a horizontal ribbon specific to that feature type displays. Because the ribbons are specific to a feature type, the available options change.

You can use the fields on the ribbon to modify the features or you can click Properties on the horizontal ribbon to open the corresponding properties dialog box. You can also click Edit > Properties from the menu bar or select Properties from the context menu. To open the context menu, right-click on the feature.

Leg

A leg is a group of route features routed in the same direction.

Duct Part

A duct part is a physical component that comprises a feature and is generally selected by the software. The following illustration shows some examples of duct parts that represent a portion of a duct system. The highlighted portion of the figure shows a section of the Workspace Explorer containing the hierarchy of duct parts.

Cross Section

The path feature of the duct is linked to a cross-section that is used to define the shape of the duct. These cross-sections provide an outline of the shape of the duct, while the feature provides the geometry path.

Component

In-line and surface-mounted parts such as heaters, gauges, and access panels to your HVAC system. When you select a nozzle or component end, the software sets the cross section of the duct to match the cross section and orientation of the nozzle or component. Two modes of operation are available when you insert a component, standalone and routing.

  • Standalone Mode - Places a component independently without using other commands. This mode starts when you insert a component in a straight feature or at an end feature of a completed duct run.

  • Routing Mode - Works in conjunction with the Route Duct command. After you have started the Route Duct command, you start the Insert In-line Component command and place the component at the active point. The Route Duct command remains active.

Connection

A connection is an object that connects two parts, for example, a flange and a duct part. The following illustration shows the details of a nozzle connection:

(A) - Flange (connection)
(B) - Minimum straight length
(C) - Welding gap

Boundary

A boundary is a port of the terminal object in a select set. Boundaries can exist at line change, run change, branch point, and split.

Equipment

Equipment may have one or more HVAC nozzles through which the connections to the duct systems are made. Using the Equipment task, HVAC equipment like fans, chillers, and air handling units can be modeled directly in the model or can be placed from the Catalog if they are available in your project.

HVAC Nozzle

An HVAC nozzle is the connect point between duct parts and equipment. The nozzle contains definitions of the connection like flow direction, duct cross-section, and size.

The vertical toolbar on the left side of the window contains tools that you use to route the HVAC system. The Select tool allows you to quit all active commands and select an object that you want to review or modify. After you place a section of ducting, you then can modify the run with several commands, for example,

  • Inserting split features or splitting one line into multiple runs.

  • Modifying the size of the existing run by inserting a transition feature.

  • Adding components to represent a complex composition of the run. For example, in-line components and surface-mounted components.

Tools and Commands

The vertical toolbar on the left side of the window contains tools that you use to route the HVAC system. The Select tool allows you to quit all active commands and select an object that you want to review or modify. After you place a section of ducting, you then can modify the run with several commands, for example,

  • Inserting split features or splitting one line into multiple runs.

  • Modifying the size of the existing run by inserting a transition feature.

  • Adding components to represent a complex composition of the run. For example, in-line components and surface-mounted components.

The HVAC task includes the following commands:

Select - Selects objects in the model so that you can copy, move, modify or delete the objects.

Route Duct - Creates a new duct run, extends an existing run, routes to or from nozzles or end features, and creates branches from duct runs. If you select an end feature before starting the command, that feature is the default starting point for the new duct run. For more information, see Route Duct.

Insert Split - Cuts a duct into two, or more, segments and inserts a split feature to connect the ends. You can insert a split between straight and non-straight features, and between non-straight features, such as turns. You can start the Insert Split command without finishing the Route Duct command. That is, you can split parts and then continue routing the duct. If you end the Route Duct command so that the split feature and end feature are in the same location, the software automatically deletes the split feature. For some split types, you need to use Depth Slope to orient the split correctly. For more information, see Insert Split.

Insert Transition - Adjusts the duct to accommodate a change in shape by placing and modifying a transition feature. You can create a transition feature only on an existing end feature or HVAC port

If you select an end feature or nozzle before starting this command, the software inserts the transition at that point. If you insert a transition during the routing of a duct run, clicking Finish returns the software to routing the duct at the end of the transition feature. Click Properties on the horizontal ribbon to set the properties of the transition feature at any time during the command. For more information, see Insert Transition.

Insert In-line Component - Places components that the software did not place automatically during routing. These components can include straight features, end features, cross sections, and so on. However, this command cannot place hoods, terminal boxes or plenums, which are enclosures or chambers that contain gas at a higher pressure than the surrounding atmosphere. Place these components as equipment in the Furnishings and Equipment task. Click Properties on the horizontal ribbon at any time to set the properties of the in-line component. For more information, see Insert Inline Component.

Insert Surface Mount Component - Places surface-mounted components at the location and rotation that you want. When you select a feature before clicking the command, the component appears on the selected feature; however, you can type precise values for the component location using the Reference position and Offset boxes on the ribbon. Also, you can make changes to the horizontal ribbon to further define the component. You can click Properties on the horizontal ribbon at any time to set the properties of the surface-mounted component. For more information, see Insert Surface Mount Component.

Generate Spools - Defines a spool, or fabrication assembly, for the selected ducting. For more information, see Generate Spools.

Quick Route - Joins two existing duct segments in the model. For more information, see Quick Route.

Tools > Flow Calculator - Provides a tool for you to complete partial calculations to choose the cross section or to estimate the flow rate. For more information, see Flow Calculator.