6th Holcim Awards 2020/21

96 The Hydroculus is an organic-shaped prototype for building cooling that uses hydroscopic materials and radiant heat transfer geometries. Its elongated structure is constituted by waffle ribs covered with a photonic membrane that reflects shortwave solar heat and emits longwave radiant cooling stored in the embedded thermal mass. A hydrogel membrane positioned at the top of the system stores water at a specific percentage to induce a proportional evaporative cooling and downdraft rate. It is connected to water supply tanks at the base that are linked to a desiccant water Hydroculus Cooling Evaporative and radiant thermal comfort Tuscon, AZ, USA Holcim Awards Acknowledgement prize 2020 North America