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Radiant floor slab

asked 2018-06-21 11:52:27 -0500

jluckett's avatar

updated 2018-06-21 12:30:29 -0500

Project I am working on is an existing building with a level in which the perimeter zone extends out from the level below. The concrete slab has electric heat tracing cable embedded in this perimeter area to avoid thermal loss through the slab during the winter period. I know I can assign a temperature profile to the specific area to inspect how the space would react to the temperature conditions but is there an way to model the energy use of the heating cable in the systems dialog or am I going to need to do this calculation manually by hand? Or if anyone knows of another software that is capable of producing the results.

Thanks in advance for any suggestions, -Jackson

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answered 2018-06-25 09:24:00 -0500

crduggin's avatar

Appendix G of the ApHVAC user guide covers two methods for modeling hydronic radiant heating and cooling systems that you could adapt to ER. One method uses radiant panels. The other is a bit more complicated, but is probably the most appropriate for the effects you are trying to capture. It requires creating a slab zone to embed the heating source in.

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If it is just electric radiant panel, can I just add a electric coil to the zone for this loop? Thank you

Brianna's avatar Brianna  ( 2021-05-31 22:01:07 -0500 )edit

I would just add a direct acting heater as a room unit.

crduggin's avatar crduggin  ( 2021-06-01 10:33:39 -0500 )edit

answered 2018-06-25 08:40:48 -0500

pow_skier's avatar

Using OpenStudio you could leverage a prototype and then create a custom radiant construction.

You'll have to add internal source constructions to a construction type and work from there.

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Asked: 2018-06-21 11:52:27 -0500

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Last updated: Jun 25 '18