Thermal performance of ceiling radiant cooling panel with a segmented and concave surface: Laboratory analysis

Radiant heating/cooling systems are thermally efficient and economically feasible alternatives to conventional ventilated air conditioning. This study experimentally investigates the thermal performance of ceiling radiant cooling panel (CRCP) with a segmented concave surface by evaluating conditions inside laboratory-scale room equipped this new panel. The experiments were carried out under various operating conditions, where fluid inlet temperature flow rate controlled independently. indoor temperature, velocity, humidity ratio recorded analyzed, temperatures upper lower surfaces surrounding also measured. Subsequently, heat transfer properties calculated summarized. When water decreased from 24 °C 15 at same 4 L/min, average over 1.5 °C, total flux increased 50%. changed significantly variations in while changing had smaller impact. coefficient was determined be 5.0 W/(m2·K), convective exhibited an exponential relationship difference between air. Moreover, proposed enhanced 2.6 times 45%, compared flat panel, achieve improvement as inclined fins, but area. In addition, achieved rate, which shows potential for energy saving.