Requirements for a Calculable Pipe- and Duct Network

Explains the requirements for a calculable pipe and duct network.

General Requirements

The following must be considered so that the pipe- and duct network can be calculated:
  • A closed pipe network requires an initial component at the network starting point.
  • A closed pipe network requires an ending component at the network ending point.
  • All components, pipes and ducts contained within the network must be detected. If necessary, check the classification of the system types and the selection of the components in the Settings.

Requirements for Heating

  • Initial components: Partial network start or heat generator.
  • Ending component: Partial network end or heat consumer.
  • A pump must be installed in the primary circuit.

Requirements for Cooling

  • Initial components: Partial network start or chill generator.
  • Ending component: Partial network end or chill consumer.
  • A pump must be installed in the primary circuit.

Requirements for Potable Water

  • Initial components cold water: Partial network start or drilling and clapping clamp.
  • Initial component hot water: Partial network start or potable water heater.
  • Initial component circulation (hot): Partial network start or potable water heater.
  • Ending component: Partial network end or discharge valve.
  • Circular pipes must be connected to cold- or hot water pipes using a t-piece.
  • Circulating pipes require a circulation pump to be installed in the network. Circulating pipes must be connected to hot water pipes using a t-piece.

Requirements for Waste Water

  • Initial components: Partial network end or sewer junction.
  • Ending components sewage water: Partial network start or drainage element.
  • Ending components rain water: Partial network end or rainwater feed.
  • Ventilating pipes must be connected to waste water pipes using a t-piece. A slope is not required for these pipes.
Note: When considering initial- and ending components, flow direction of the waste water is not taken into account.

During detection, the program looks for an unambiguous initial component of the pipe network and then determines flow paths towards individual ending components. During detection, flow direction of waste water is ignored, leading to sewer junctions or partial network ends being viewed as initial components and drainage elements or partial network starts being viewed as ending components.

Requirements for Ventilation

  • Initial components: Partial network start or fan. Both components must not be installed in the same flow path.
  • Ending component: Air diffuser, protective grating or partial network end.
  • The duct network must contain a ventilator or a central ventilation device.
Note: Initial and ending components are viewed independent of air flow direction.

During detection, the program looks for an unambiguous initial component of the duct network and then determines flow paths towards individual ending components. During detection, air flow direction is ignored, leading to the partial network start being an initial component even for exhaust air and the partial network end being an ending component even for extract air.

Requirements for Gas

  • Initial components: Partial network start or main shut-off valve.
  • Ending component: Gas consumer. The partial network end is intended to be used for connecting partial networks.
  • Depending on the method. A gas excess flow valve must be installed directly behind the initial component.

Several Partial Networks in a Project

A project can contain several independent systems of the same discipline, they can be switched to separately in the calculation dialog via the drop-down list Systems.

You can also create partial networks connected via partial network start and -end to construct a system that is detected and calculated as one cohesive network.

The symbols partial network start and partial network end can be used to disjoin the pipe- or duct network at a particular point and calculate parts of the network separately. The partial network end in the disciplines Heating, Waste water, Ventilation and Cooling can also be used to represent a not yet defined consumer in the network.

After detecting the pipe network, a partial network start representing a partial network can be connected to a partial network end.