Temperature ° C
29 28 27 26 25 24 23 22 21 20
S
02 / 02 / 11 12:02:13 AM 02 / 02 / 11 09:02:13 AM 02 / 02 / 11 06:02:13 PM 02 / 03 / 11 03:02:13 AM 02 / 03 / 11 12:02:13 PM 02 / 03 / 11 09:02:13 PM 02 / 04 / 11 06:02:13 AM 02 / 04 / 11 03:02:13 PM 02 / 05 / 11 12:02:13 AM 02 / 05 / 11 09:02:13 AM 02 / 05 / 11 06:02:13 PM 02 / 06 / 11 03:02:13 AM 02 / 06 / 11 12:02:13 PM 02 / 06 / 11 09:02:13 PM 02 / 07 / 11 06:02:13 AM 02 / 07 / 11 03:02:13 PM 02 / 08 / 11 12:02:13 AM 02 / 08 / 11 09:02:13 AM 02 / 08 / 11 06:02:13 PM 02 / 09 / 11 03:02:13 AM 02 / 09 / 11 12:02:13 PM 02 / 09 / 11 09:02:13 PM
Time Brick 30cm ( base Case ) Brick 20cm Concrete heavy-weight 25cm Concrete heavy-weight 40cm Concrete light-weight 25cm Concrete light-weight 40cm Concrete med-weight 25cm Concrete med-weight 40cm
Temperature ° C
25.5
25
24.5
24
23.5
23
22.5
N
02 / 02 / 11 12:02:13 AM 02 / 02 / 11 09:02:13 AM 02 / 02 / 11 06:02:13 PM 02 / 03 / 11 03:02:13 AM 02 / 03 / 11 12:02:13 PM 02 / 03 / 11 09:02:13 PM 02 / 04 / 11 06:02:13 AM 02 / 04 / 11 03:02:13 PM 02 / 05 / 11 12:02:13 AM 02 / 05 / 11 09:02:13 AM 02 / 05 / 11 06:02:13 PM 02 / 06 / 11 03:02:13 AM 02 / 06 / 11 12:02:13 PM 02 / 06 / 11 09:02:13 PM 02 / 07 / 11 06:02:13 AM 02 / 07 / 11 03:02:13 PM 02 / 08 / 11 12:02:13 AM 02 / 08 / 11 09:02:13 AM 02 / 08 / 11 06:02:13 PM 02 / 09 / 11 03:02:13 AM 02 / 09 / 11 12:02:13 PM 02 / 09 / 11 09:02:13 PM
Time Brick 30cm ( base Case ) Brick 20cm Concrete heavy-weight 25cm Concrete heavy-weight 40cm Concrete light-weight 25cm Concrete light-weight 40cm Concrete med-weight 25cm Concrete med-weight 40cm
Figure 8 : Indoor temperature profile with different thermal mass materials in classrooms 208 and 301 in Jan / Feb 2011
Discussion
In this study , the result of the field study experiment were compared to the thermal simulation analysis result , and an optimum design solution for the base case building was defined based on the optimal solution for each parameter of passive design strategy . The optimum factors were taken from the analysed passive design strategies , including orientation , glazing , and thermal mass and thermal insulation and with respect to the occupants ’ thermal satisfaction . The optimum passive design strategies were selected based on the effect of them on the indoor air temperature . Based on the simulation results which were discussed in section 6.1 to 6.4 , the suggested optimum design solutions included south and south-east orientation similar to the Iranian building regulations suggestion , external thermal insulation material with the U-value between 0.28 and 0.32w / k for the external walls and inner side of roof , 25 cm high density concrete blocks as a thermal mass material for the exterior façade as well as double glazing windows ( Optimum Solution 1 ). In addition , 30 cm outer brick is considered as an alternative option as thermal mass material ( Optimum Solution 2 ). Figure 9 illustrates the indoor air temperature of the real base case and the optimum solutions in classrooms S and N with respect to outdoor temperature and the minimum comfort temperature . It should be mentioned that the heating system is set to be off for the calculation of the optimum design solutions to estimate the energy consumption of these design solutions .
Passive design strategies on indoor comfort of school buildings in hot-dry climates 759