Study On Thermal Comfort Of Perforated Ceiling Air Supply Used For Wall Hanging Air-conditioning

With the development of society,people spend most of their time living or working indoor,Indoor environment has become one of the most important environment for human life. A good indoor environment not only has an important meaning for people’s health but also has significant effect on improving work efficiency. Therefore, Indoor environment has become an important part of building environment and has attracted more and more attention.At present, international and domestic academics have taken a great deal of research on influence of air supply mode on indoor thermal comfort, and result proves that it is the determining factor for thermal comfort. In this paper, perforated ceiling air supply was used for wall hanging air-conditioning room, analysis indoor air distribution by numerical simulation and experimental measurement; study the influence of perforated ceiling air supply on indoor thermal comfort. The contents of this paper are as follow:(1) Establish numerical model of room using traditional jet distribution based on actual building model, and set indoor boundary conditions. Numerical simulation air distribution of air-conditioning room at refrigerating and heating conditions.(2)The numerical simulation method is adopted to simulation air distribution of different air supply outlet form and air supply volume in wall hanging air-conditioning room using perforated ceiling air supply at refrigerating and heating conditions. By Compared temperature field, velocity field and PMV/PPD distribution, shows that a reasonable air supply outlet form and speed is the key to indoor thermal comfort under the same air supply volume, and the height of indoor temperature depends on air supply volume.(3)Based on air distribution of traditional jet air supply and perforated ceiling air supply, compared indoor thermal comfort of the two air supply method, the results show that: temperature stratification is more obvious in room using perforated ceiling air supply than traditional jet air supply. but perforated ceiling air supply mode have better temperature distribution in working area result from a good temperature control ability in the lower area of the room. What’s more, air velocity is small and distribution uniform in perforated ceiling air supply room, and draught sensation of indoor staff is less than traditional jet air supply.(4)Tested indoor temperature by measurement, and shows the accuracy of the simulation results by compared experimental data with simulated data. Analysis the practicability of perforated ceiling air supply mode, and makes an expectation to further advancement.