ZEMCH 2015 - International Conference Proceedings | Page 737

Also the simulation performed by IES VE shows the amount of room air flow in Figure 22 in above
table and demonstrates less flow rates in the efficient case as 5.9 l/s while it is a 9.4 l/s in the base
case, the change here keeps the building in a healthy performance and save 37.2%.

Figure 23: Room cooling plant sensible loads for base case (up) and efficient case (down)
Room cooling plant sensible loads are calculated for the months of the year, excluding 3 months
of winter season which do not require an air conditioning (AC) cooling from December to February. The graphs above (Fig.23) indicate the system load as 110 KW in the base case, and in the efficient case is 70 KW, meaning that there is an intense reduction in the cooling loads after replacing
the basic materials with the more efficient and well insulated materials. Variation is around 36%
which makes a good annual saving.

4. Discussion
It was an advantage to use self-shading strategy; to obtain a reduction in the hottest months of
the year up to 52.78% compared to the case, and avoid amounts of incident solar on the building
facade. Exposure in the winter was accepted; as the weather is cold, and the need of sun’s heat is
desirable to warm the internal spaces. While redesigning the building, the shape was refined to

Designing a passive automobile showroom in hot climatic conditions

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