interiorConvection

Heat from a room surface to the air: natural convection, or a fixed coefficient

FastSmoothBuildings.Envelope.Functions.interiorConvection, function (source)

Purpose

Heat flow rate from a room surface to the room air, with ΔT the surface minus the air temperature:

• Q = h_fix A ΔT with a fixed coefficient hFix > 0;
• otherwise the natural convection of naturalConvection, Q ≈ A c |ΔT|^4/3 sign(ΔT), with c = cPos when the surface is warmer than the air and cNeg when it is colder (convectionCoefficient).

Use

The room faces of every surface of Envelope; the zone sets hFix from its parameter hConInt.

Revisions

• October 2026: moved from trano's FastModel.Envelope.Functions.