Residential sector

The purpose of this research is to found the impact of built area and occupant number on winter gas consumption in the residential building sector of Iran, Shiraz.Sothe annually and monthly gas consumption data through 19 houses were analyzed to achieve the heating energy consumption and operation month.The average operation months of gas heating consumption were from first of November up to end of April and the average maximum monthly gas consumption of sample houses was in February. On the other hand, the case study houses have different built area from 80 t0 200 m2andoccupant number from 3 to 7 persons.It was concluded that the biggest and busiest houses did not consume the maximum annual gas consumption and so the smallest and low occupant ones about minimum consumption. Therefore, the samples heating consumption was not so related to the built area and occupant number. The occupant culture and behavior was more supposed to be related with energy consumption in residential sector of the city.

In this research multiple-regression analysis with stepwise selection method was employed for investigating the effect of vertical building envelopes solar radiation (Evr) on cooling energy consumption (E cooling) in residential sector. The high capacity of solar energy in semi-arid climate (Shiraz) can provide a part of buildings required energy. Depends on house orientations in two directions of SE and SW and by using statistical data, E cooling in urban residences was analyzed. The autocorrelation in the residuals, checked by Durbin- Watson test, was not existed. By investigating the relations between average Evr and E Cooling in each group, it can be proved that climatic orientated houses can achieve lower E Cooling, owing to SE desirable orientation. The percentage of Evr in SW houses is 28.89 % and in SE it is 15.72 %, so choosing the building orientation is important to reduce energy consumption. Finally, the concluding remarks were indicated.