Abstract
Thermal comfort is very essential for the occupants in the residential building without air-conditioning system in the hot and arid climatic regions. In this study, the thermal comfort prevailed inside the room with window openings at their adjacent walls was analyzed under various wind directions by computational fluid dynamic technique. The CFD simulation was validated with the experimental results obtained from wind tunnel test rig and network model and found that it is having a good agreement. The room with single window opening at the adjacent walls was investigated under various wind directions and based on their prevailed uncomforted zones, the window opening at the windward side wall was splited in to multiple vents as double and triple vent system without changing window opening area. From this study, it was identified that the triple vent system reduces the indoor temperature and predicted mean vote by 0.3 and provides improved uniform thermal comfort.
Highlights
Thermal comfort is the state of mind that expresses satisfaction to the occupants with the thermal environment
The pressure difference across the window opening can be calculated from the Eq (12): Fig. 4: Comparison of pressure coefficient predicted from Computational Fluid Dynamic technique (CFD) simulation and wind tunnel test
The CFD simulation was validated with experimental test result and network model
Summary
Thermal comfort is the state of mind that expresses satisfaction to the occupants with the thermal environment. Thermal comfort can be enhanced by providing good indoor air ventilation through natural means and mechanical systems. For a naturally ventilated building, it is essential to predict thermal comfort through thermal comfort index, since other parameters like ventilation rate and air change hour cannot predict the level of comfort with in the space. In the real case, the window openings are located at the adjacent sides of the room walls In this context present work is focused to study the thermal comfort in a residential room with window openings at the adjacent wall. This study includes the analysis on modified form of traditional window opening that provides uniform indoor thermal comfort under wide range of wind incidence direction. The air flow inside the building was investigated by Computational Fluid Dynamic technique (CFD). Xiong et al (2012) and Ramponi and Blocken (2012) performed the air flow analysis in the buildings by using CFD due to its informative results and low labor and equipment costs
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