| บทคัดย่อ(English) |
This research is studying, numerically, the performance of a roof solar collector (RSC) with regard to optimum natural ventilation and its adaptation (RSC) for new habitations with respect to traditional Thai style. The configuration of RSC was made by using CPAC monier roof tiles on the upper part and gypsum board on the lower part. The ambient conditions (solar radiation, ambient temperature, wind velocity and relative humidity) used for this study are based on data of Bangkok. The results of the simulation were that the appropriate operating conditions of RSC are the following : 20 to 60 tilted angle, 100-200 cm length, and the space gap between CPAC monier and gypsum board should be limited to 0.14 m. For designing, the better configuration of roof was the model that consists of three different plate sections with three different slopes (30 ,45 and 60 degree ). The appearance of this model is well close to the traditional Thai roof demonstrating the good feature of old Thai style. The other three configurations, more simple, investigated in this study, could also induce a significant part of natural ventilation. Finally, whatever the selected configuration, the RSC will improve the cooling efficiency by reducing the rate of heat transferred to interior of houses. |
