부산대학교 도서관

Cooling capacity is a critical factor for designing and operating ceiling radiant cooling panel (CRCP) systems. Although full-scale tests can accurately measure cooling capacity, they require considerable time, space, and costs to construct test facilities and conduct experiments. Furthermore, evaluating individual CRCPs and investigating the impact of air velocity on their cooling capacity is challenging through full-scale tests. Therefore, we developed a simple and practical method to overcome these limitations using an evaluation unit. A compact system was created using a thermoelectric module (TEM) to supply hot water to the load-simulating CRCP and chilled water to the evaluated CRCP. Preliminary test results showed that appropriate water temperatures can be obtained by combining a TEM, cooling fans, and a radiator. In the evaluation results, the investigated CRCP achieved a cooling capacity of 71.8 W/m2, which is within the capacity range reported previously. Increasing the air velocity at the CRCP surface by 2.0 m/s enhanced the cooling capacity by 71.1 %. Additionally, higher air velocities enhanced the cooling capacity with a smaller temperature difference between the chilled water and room-air, implying that combining the CRCP with an air system to increase the air velocity on its surface allows it to operate under higher chilled water temperatures.