Bowl-Shaped Roofs Collect Rainwater and Provide Natural Cooling in Arid Environments

By: | January 24th, 2017

Iran-based BMDesign Studios has unveiled an ingenious, bowl-shaped roof which could help Iran solve its burgeoning water crisis.

BMDesign Studios has come up with the design to meet the current water shortage. Known as a Concave Roof, this double-roof system is designed in a way that not only collects and stores rainwater, but also promotes natural cooling.

Concave roofs are designed primarily for arid regions with the problem of high temperatures, having very high evaporation rates, and very low annual precipitation. The roof is designed to “help [make] even the smallest quantities of rain [flow down] the roof and eventually coalesce into bigger drops, just right for harvesting before they evaporate,” the architects reported to the publication ArchDaily.

Here are some of its features:

  • The Concave Roof has steep slopes to move raindrops towards a central collection point and then into reservoirs.
  • Reservoirs are placed between building walls for regulating indoor temperatures.
  • Placement of a concave structure atop a convex roof helps in increasing shade and wind movement between them which helps in bringing down the building’s temperature
  • The architects estimate that 28 cubic meters of water could be harvested with just 923 square meters of a concave roof surface.

BMDesign Studios’ vision not only helps in making the indoor buildings comfortable but it also reduces the overall carbon footprint of much-needed air conditioning in places with a harsh environment.

Nidhi Goyal

Nidhi is a gold medalist Post Graduate in Atmospheric and Oceanic Sciences.

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