Study On The Influence Of Dormitory Shape And Opening On Single-sided Ventilation

Natural ventilation is an important measure to reduce air conditioning energy consumption and improve indoor environment.Because of the shortage of land,the slab-typed dormitory is generally deep,and the large depth makes a large number of one-sided ventilation rooms appear in theslab-typed dormitory,owing to the students’ living habits and privacy and other factors,the dormitory is usually only carried out unilateral ventilation.The problem of lacking of natural ventilation caused by unilateral window opening will not only directly increase the energy consumption of residential buildings,but also reduce the indoor air quality and affect human health.This paper takes student dormitory in universities in Xiamen as example,carries on the actual investigation to the student dormitory in universities in Xiamen,classifies the dormitory according to the building shape system,the combination pattern,the opening setting place.This paper summarizes the related factors which affect the indoor one-sided ventilation,and through the simulation analysis of PHOENICS software,its influence law on the one-sided ventilation of the dormitory,which provides the guidance and reference for the design of the slab-typed dormitory.The research work and conclusions are mainly reflected in the following aspects:First of all,the present situation of student dormitory in Xiamen area is investigated,It was found that the font size and U shape accounted for 50% and 44% respectively;the proportion of corridor-type dormitory buildings was up to 69%;the length of dormitory buildings became Normal distribution,with 40-60 m as the center declining to both sides;dormitory building height is mainly 6-7 layers accounted for 80%;dormitory unilateral openings in the form of concave and convex openings and peace-based,accounting for 62% and 38%,respectively,and The flat openings accounted for 61% of the sliding windows,and the flat windows accounted for 25%,while the convex and convex windows accounted for 52%.Then,through simulation software,the influence of the angle between the orientation and the incoming flow and the length of the dormitory building on the unilateral ventilation is analyzed.The main conclusions are as follows: the indoor single side ventilation effect is better when the angle between the dormitory and the incoming flow is between 22.5° and 45°.When the angle of the building and the inlet is 45°,the average wind speed of the indoor ventilation increases with the increase of the length of the building when the length range of building is less than 54 m.When the building length is more than 54 m,the average wind speed of the front dormitory increases with the increase of the length,and the wind speed of the rear dormitory is smaller.Secondly,through the simulation software,the paper analyzes how the direction,the incoming flow and the long side dimension of the U-shaped composite slab-typed dormitory influence the one-sided ventilation.The main conclusions are: U type slab-typed dormitory building orientation and flow angle between 0° to 45° and 0° to-45°,the overall single side indoor ventilation of the building.U type slab-typed dormitory should increase the side length of front board dormitory,which can increase the pressure difference of gale,and it is beneficial to the unilateral ventilation in the rear board dormitory.Finally,the influence of the facade opening on the unilateral ventilation is analyzed by simulation software.It is concluded that the ventilation effect of flat open dormitory is better than that of horizontal direction,and the excessive opening of room is bad for unilateral ventilation.The setting of concave and convex orifice is beneficial to the unilateral ventilation of dormitory,and the concave and convex orifice can be used to improve the unilateral ventilation of dormitory.