Influence of tube diameter and water temperature on radiant ceiling cooling capacity

Establishes an experimental platform for concrete roofs with De16 and De20 buried tubes, and theoretically analyses and experimentally tests the cooling capacity at different supply/return water temperatures in summer. The results show that the ceiling temperature for De16 is higher than that of De20 by about 0.1 ℃, the cooling capacity for both tube diameters varies from 39 W to 25 W, and the difference is about 40%.