ENHANCEMENT IN THE PERFORMANCE OF THERMAL RADIANT COOLING SYSTEM

In terms of energy consumption, radiant cooling system has an advantage over conventional system. A significant amount of systems is consumed by fans, which are used to transport cool air through the ducts. Part of this electricity used to move the air also heats the conditioned air and, therefore, is part of the internal thermal cooling load. If the tasks of ventilation and thermal conditioning of buildings are separated , the amount of air transported through buildings can be significantly reduced. In this case the cooling is provided by radiation using water as the transport medium and the ventilation by outside air systems without the need for recirculation and cooling of air. Although the supply air necessary for ventilation purposes is still distributed through ducts, the electrical energy for fans and pumps can be reduced to approximately 25% of that of conventional air - conditioning s ystem. This experiment studies the application of radiant cooling using natural air for ventilation under hot and humid climate of Rajasthan. To avoid condensation of moisture on the cooling panel, the temperature of water supplied to the panel was limited to dew poin t temperature. The results generally confirm the good potential for application of radiant cooling.