Radiant heating systems - how to improve thermal and hydraulic results

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Product InstalSystem 5
Type of article TYPICAL PROBLEM
Source for translation IS 5.0 Beta 3.B1


Problem description

Thermal and hydraulic results improvement by adjusting structural and operating parameters of a radiant system heater.
For more information, see: Design of radiant heating floor and wall installation

Solution

PARAMETERS TAKEN INTO ACCOUNT WHEN DESIGNING A SYSTEM AND CONSTRUCTING

  • Arrangement and size of radiant heaters - larger surface area of a Heating/Cooling Floor Zone enables lowering supply temperature.
    1. Size of Heating/Cooling Floor Zone


    For more information, see: Heating/cooling_zone
  • Maximum attainable supply temperature when heat pump is the source.
  • Maximum loop length - has effect on flow resistance and manifold size, and thereby also on operating and capital costs.
    2.Max. L

  • Perimissible pipe spacing - has effect on mean surface temperature of radiant heater.
    3. Pipe spacing

  • Insulation thickness under radiant heater - has effect on Losses of radiant systems to outside of source feed area.
    4. Insulation layer

  • Selection of proper Covering in rooms - has effect on radiant heater efficiency and on uniform temperature distribution on heater surface.
    5.Covering

    For more information, see: Changing structural parameters

PARAMETERS THAT CAN BE SET/ADJUSTED IN COMPLETED SYSTEM

  • Supply temperature, if a system with adjustable temperature is used (e.g. gas-fired water heater with a mixer or a mixing pump set)
    6. Supply temperature

    For more information, see: Modifying system parameters to adapt attained output to required output
  • Maximum flow rate in floor heating loops - possible by adjusting Δθ min OZ, Δθ max OZ, Δθ min PZ and Δθ max PZ or by specifying Temp. diff. supply-return.
    7. Parameters that have effect on maximum flow rate in floor heating loops

    For more information, see: Changing operating parameters