| Summary: | 碩士 === 國立成功大學 === 建築學系碩博士班 === 101 === Introduction
The research focused on the opening location and Window style use naturally ventilation at container residential building in Tainan. Through the use of vertical baffle and horizontal louvers window style compare of the Horizontal pull window realize what Impact on indoor air environment. After further using the Comfort algorithm to analyze monthly space heating and cooling loads.
Above all, it was assumed that steady ventilation of the structure could be achieved. using the method of CFD simulation ,find out Temperature and airflow field，and Probe into different environment variable influence on the ACH、Draft Rate, at following: Inlet air velocity, window styles, opening location and interior door switch, etc. According to the result of studying cases with CFD simulation, providing the accuracy of the CFD simulation.
In the discussion part, first of all, compare of three window styles and nine opening location influence of living space ventilation to understand meets the minimum ACH standard, and then focused on the living space of Draft Rate and average temperature relations. Take health and comfort of the evaluation results then using the Comfort algorithm to analyze monthly space heating and cooling loads. To understand the different window location effect of the heat load.
Purpose
1.Using Numerical simulation establishment of evaluation process
2.Probing into air quality in temporary container building.
3.Improve of the thermal environment in temporary container building.
4.Find more comfortable container houses.
Method
This research selected two 20-foot containers Combination of room space, length, width, and height of 6.1m × 4.8m × 2.5m,and 0.4 m on the ground for experimental measurement.
Use CFD to analysis different wind speed, opening location, and window style are manipulated variables in daytime and nighttime usage patterns.
Through heat load dynamic numerical simulation software for indoor health (ACH), and indoor comfort (Draft Rate、average temperature, vertical percentage dissatisfied) select the best combination of programs, and then using the comfort algorithm to analyze monthly space heating and cooling loads. To understand the different window location effect of the heat load.
Research result
1.When wind are parallel with the window and wind velocity 0.4m/s, it can improve by 2.61 times of air change rate among the rooms after installing the sash window styles, and the best of the ACH is using the Vertical baffle window styles, average increase of 2.75 times. Among them,02 deployment pattern ACH average increase of 2.95 times.
2.In the three types of windows styles , most likely to occur the draft rate effect is installing the vertical baffle window styles. when wind velocity above than 0.99~0.16m/s ,draft rate, DR is over the C grade,25%, established by ASHRAE. When wind velocity under 2.2 m/s, using the Horizontal push out windows and horizontal sliding windows, the DR could satisfy the C grade,25%.Particularly the use of horizontal push out window styles when the wind speed is lower 2.2m/s , the DR could satisfy the A grade,15%.
3.In the three types of windows styles , the most of excellent thermal environment is using the Vertical baffle window styles, the best of all is using 02 deployment pattern, followed by 01 and 03 deployment pattern. Overall the case wind speed and deployment pattern no significant correlation.
4.Aspects of vertical temperature in the percentage dissatisfied (PD), overall the case the PD could satisfy the A grade,( PD≦3%), established by ASHRAE. the best of all is using vertical baffle window styles, indicate the temperature gradients is smallest change. When wind velocity is 0.4m/s have obvious temperature gradient. Although the average temperature is much higher than the reference value of 28℃,but the better performance is the A02 deployment pattern. Overall the case wind speed and vertical temperature gradients no significant correlation.
5.The best of the hot comfortable algorithm is the 02 deployment pattern after installing the vertical baffle window styles, than horizontal sliding windows styles can reduce 6% uncomfortable time. Also the best cold comfortable algorithm is installing the horizontal sliding windows styles, than horizontal louvers window styles and vertical baffle window styles can reduce 7~8% uncomfortable time. Therefore Comfort comprehensive assessment results show that the Vertical baffle window 02 deployment pattern 〉 horizontal louvers window 02 deployment pattern 〉 horizontal sliding windows 02 deployment pattern.
6.In the three types of windows styles, the best of thermal environment is 02 deployment pattern in Tainan climates. Showing 02 deployment pattern than other is conducive to ventilation and reduce heat accumulated .
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