Interactive calculations of radiant systems

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Product InstalSystem 5
Type of article FUNCTION AND TOOL
Source for translation GOLD Rev. 17.1


Description

Interactive radiant systems calculations enables fast manual adjustment of selected parameters of a radiant system in given application (Heating/Cooling). In the Interactive radiant systems calculations window the following can be adjusted:

  • pipe spacing calculated by the program,
  • the value of Temp. diff. supply-return
  • the value of No. of H/C Areas.
    1. Interactive calculations window-heating tab

    2. Interactive calculations window-cooling tab

After modifying any of these parameters and clicking Calculate, only the minimum required set of calculations is made:

  • pressure drops in the radiant heating/cooling loops are balanced only in relation to each other across the manifold.
    Pressure drops across the manifold balancing valves are calculated under the assumption that the pressure at the manifold inlet is equal to the required minimum available pressure for this manifold.
    After these calculations pressure drops are recalculated with flow calculations made for the entire system, when the pressure at the manifold often turns out to be higher than the required minimum available pressure.

For this reason, after closing Interactive radiant systems calculations:

  • calculations must be run, as the project has an uncalculated status, which is indicated, for instance, in the status bar:
    Attention! The project has not been calculated or data have been modifed since last calculation..

Location in the program

  • The Interactive radiant systems calculations icon is available in the Main tools bar in section Calculations.
    3. Interactive radiant systems calculations

  • Keyboard shortcut: Ctrl + Shift + F10.

Examples of use

Which interactive calculations are possible and which windows are editable depends on the selected use of source.

  1. Heating use - in the Interactive radiant systems calculations window it is possible to modify parameters in the Heating tab, the Cooling tab is empty.

  2. Heating and cooling efficiency use - in the Interactive radiant systems calculations window it is possible to modify parameters in the Heating tab, the Cooling tab displays all values, but these cannot be modified.

  3. Cooling use - in the Interactive radiant systems calculations window it is possible to modify parameters in the Cooling tab, the Heating tab is empty.

Other possibilities in the Interactive radiant systems calculations window

  1. Filtering H/C areas connected to given manifold.
    5. Filtering Heating/Cooling Zone connected to given manifold.

  2. Restoration of automatic calculation settings - Restore AUTO settings.
    6. Restore AUTO settings

Adjustment of the number of Heating/Cooling Areas

  • When the number of H/C Areas is changed manually, the default values of Temp. diff. supply-return (computer status) are restored for all H/C Areas belonging to given H/C Areas Zone.

Adjustment of pipe spacing

  • As a result of manual adjustment of Pipe spacing the program can change the value of Heating-cooling surface, but the automatic mode of Heating/Cooling Zone division is not disabled.
    Change in the value of Pipe spacing in a single Heating-cooling surface changes that parameter in all H/C Area elements present within the common Heating/Cooling Zone.

Adjustment of Temp. diff. supply-return

  • Modification of this value may, among other things, have an effect on the elimination of the diagnostics message:
    • water velocity in pipe not sufficient for self-venting.

Additional information

The consequence of adjusting parameters in Interactive radiant systems calculations is the rejection of the option of optimum supply temperature determination in a radiant system according to the criterion selected in General data:

  • heat output and press. drop,
  • min. investment costs.

This rejection is indicated by the program with diagnostics messages at the hint level:

  • there is a better spacing in heat output terms than the one specified,
  • there is a better spacing in cost terms than the one specified,
  • there is a better spacing in heat output and flow terms than the one specified.

The list of diagnostics messages in the Interactive radiant systems calculations window may differ from that in the Diagnostics window. Any adjustments in the design should be based on the list of messages created after calculations are made for the appropriate scope of the design, e.g. "Heating and cooling systems", that is in the Diagnostics window.

Rules of highlighting the fields which are editable in the calculations window:

  • Changing a value in a field causes the cell to be highlighted with another colour and presentation of that value.
    6. Presentation of a field with a manually entered value immediately after editing

  • No colour highlighting after completed calculation.
    7. Presentation of a field with manually entered value after calculation