Water withdrawal simulation

Water withdrawal strategies

The new water withdrawal simulation features two water withdrawal strategies.

The‘Flushing’ water withdrawal strategy follows a specific sequence of withdrawals and is carried out as follows:

• Opening of all components of the flushing technique
  • Supply line to the fire-fighting water transfer station
  • Flushing system for Coolflow systems
  • PWH flow paths
  • PWC flow paths
  • Flow paths to mixed-use outlets
• The criterion for termination is a single water exchange in all sections where water is flowing.

Thewater extraction strategy forcommissioning 806-4 is carried out as follows:

• Opening of all tap points
  • All extraction points are opened room by room.
  • They are sorted according to the length of the flow path, starting with the shortest flow path.
  • Intake points, disregarding flow rate limiters
• The termination criterion is a 20-fold water change in all sections where water is moving.

Simulation user interface

• Thanks to the bidirectional link to all simulation objects, the individual results are easy to trace.
  
  
• The ‘Dashboard’ window of the water abstraction simulation manages the simulation results.
  
  
• The ‘Water Withdrawal Sequences’ window displays the individual water withdrawal sequences and their additional information in tabular form. The ‘Status’ column indicates whether a water withdrawal was successful or not. A green tick indicates that the sequence was carried out successfully. The cancellation symbol indicates that the sequence was not successful, for example due to non-turbulent flushing of a section.
  
  
• Simulation objects
  
  
• The section list uses a green background colour for each section to indicate whether a 100 per cent turbulent flush has taken place in a previous water extraction sequence. The sections highlighted in grey are assigned to a circulation loop. Optionally, you can view the sequence from which the water in the section was replaced 100 per cent for the first time.
  
  
• The ‘Water Outlet’ window displays information about the selected consumer in the current water withdrawal sequence.
  
  
• The Circulation System window displays an overview of the selected circulation section.
  
  

Analysis

The water renewal of the extraction strategies can be visualised in the analyses.

Labelling

Flushing devices and consumers relevant to flushing are labelled with simulation parameters from the water withdrawal simulation.

Documentation

The simulation report for the water withdrawal simulation has been separated from the circulation simulation and is available as a standalone results document. The report is structured in the same way as the previous presentation of the flushing simulation. There is a new report option for documenting all sub-sections at the end of all water withdrawal sequences.

Performance

To ensure that the full performance potential of the process architecture can be utilised, the simulation now runs as a multithreaded process immediately after the calculation. By executing individual tasks in parallel, this results in a significant acceleration of the simulation.