The concept of the solar chimney has been adopted to judiciously convert any high-rise building into a zero-energy-use building. The invention comprises a nano-based air solar reactor designed to absorb and store thermal solar energy at temperatures above 280° C, and effectively supply it through a number of adept systems to perform useful work. The air solar reactor is a mechanical assembly that has the main objective to create an air updraft when fitted into the vertical air shaft of a high-rise building and perform as a solar chimney to produce electric power. The air solar reactor is also designed with the capability to operate an absorption chiller, a hot-water system, and a small water desalination unit.
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