Analysis of thermal comfort in space equipped with stratum ventilation and radiant cooling ceiling

The main goal in design of heating، cooling and air conditioning systems is to provide thermal comfort. In present study، performances of radiant cooling ceiling system and stratum ventilation have been studied separately and together to provide the overall and local thermal comfort conditions. Therefore، using computational fluid dynamics، indices PMV (predict mean vote) and PPD (predict percent dissatisfied) has been studied as two overall thermal comfort parameters. Also، vertical temperature gradient and draft risk has been studied as two indices dissatisfaction of local thermal comfort. According to the results of this study، combining stratum ventilation and radiant cooling ceiling caused a uniform distribution of overall thermal comfort conditions. Also vertical temperature gradient decreases and there is no draft risk. Therefore combining stratum ventilation and radiant cooling ceiling is introduced as the new Strategy and application ability to provide the proper conditions to achieve overall and local thermal comfort.