148
Design process
SHAPE 5.1 90O
90
45O
45
SHAPE 5.2 90O
45O
SHAPE 5.3 90O
45O
ill. 148.1. CFD roof simulation. Shapes 5.x.
small and not that aggressive. This proved that the round buildings handle better air flow around the building. So far, these analyses of the shapes of the roof made it clear that this shapes won’t create an optimal solution. This is when the idea of creating a gap in the roof came (shape 5.x). A simulation showed that as long as the wind is not blowing along the building, there will always be a negative pressure at the very base of the gap. Still, the
wind blowing from the south or from the north would make a problem. After analysing how the gap is responsible for creating the negative pressure there, it started to be clear, that in the mentioned direction of the wind there should also be some kind of an obstacle on the way of the air flow. This is where the additional walls in the gap were added to ensure that there will be also a negative pressure or equal to the facades in those gaps, when the wind will blow from those directions. Further, the investigations tried to figure out how many of these elements there
were needed depending on the roof slope (ill.149.1 ). Planning the guest rooms The position of the rooms was already known – according to the north-south axis, they should be positioned perpendicular to it. Once the basic idea for the natural ventilation was proved to be working in the theory, it was time to use the before mentioned strategy for ventilating the guest rooms. At