Radiant cooling system is a promising technology in saving building energy consumption as well as achieving better thermal comfort. However, in design and simulation of radiant systems, there is a lack of information on one basic parameter: the radiant and convective split of internal heat gain. This study established the dynamic heat transfer model of rooms with radiant cooling systems and internal heat gain components like equipment, lighting and occupant. Through the parametric simulation results, we found the mean radiant temperature of rooms with radiant system could be decreased by 1.0 ⁰C. The radiant splits of internal heat gain are increased: from 0.50 to 0.56 for equipment, from 0.50 to 0.54 for lighting, while from 0.40 to 0.48 for occupant.
Keywords radiant cooling system, radiant and convective heat split, internal heat gain