Simulating radiative cooling/heating using BES-CFD coupled simulation

The radiant cooling and heating system like the thermo-active concrete core system (TACS) has long been recognized as an alternative to the conventional all-air system, especially in Europe. The latest developments in simulation tools for radiative cooling/heating focused on the explicit plant definition in the simulation tools, i.e. how to simulate what is behind the radiant surfaces There is less attention on what is going on between radiant surface and the occupied zone. This paper explores the advantages of using the coupled simulation between building energy simulation (BES) and computational fluid dynamics (CFD) simulation in designing space conditioning by radiative cooling/heating. The way the coupled simulation treats the convection coefficient definition can be utilised to improve the prediction of thermal comfort and energy consumption.