1-Concave roofs/ Rain harvesting dishes
- Rain harvest & providing shade
Rain drops hit the earth at an incredible speed of 10m/s and break up to droplets. In a heavy rainfall these tiny droplets integrate and make a flow of water on the surface. In light rainfalls these droplets eventually evaporate back to atmosphere before they can make a flow but by employing a very steep sloped roof in the shape of a dish or bowl we can help these droplets to run and integrate into bigger drops and be collected.
These big dishes (the outer shell) provides shade for the main roof below while letting the air to freely move and cool both roofs off.
In Namib desert – Fog-Basking Beetles gets their water source from the fog by the way of condensation. The dew droplets run over their smooth posterior and they drink it. The cold smooth surface of concave dishes on roof do the same, they help the dew that forms on their surface to flow down the dishes and be collected.
2- Courtyard building
Courtyard buildings are very common in desert architecture because they are excellent in trapping the cold air. In our project we designed a sunken courtyard building to trap desert’s cold air at nights, reducing the dish’s temperature during the night that will help more dew forms on the inner surface of the dishes and more rapidly. Cold night’s sky also will make the dishes cold by the way of radiant cooling.