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Optimizing a design for a cooling or insulating skylight.

Number: pap. 1060

Author(s) : FÄLT M., PETTERSSON F., ZEVENHOVEN R.

Summary

Both cooling and thermal insulation can be achieved using a triple-glazed skylight filled with a greenhouse gas. Utilizing radiative cooling as the driving force, a cooling effect can be achieved with the here outlined skylight, while it can naturally also act as a thermal insulator when desired. Radiative cooling is the mechanism that cools our planet. All the solar radiation that is absorbed by our planet is eventually also emitted by thermal radiation. Would this not be the case, the planet would heat up. The skylight proposed here circulates the greenhouse gas it contains by natural convection induced by its heated lower compartment, to the radiatively cooled upper compartment "seeing" the sky. By this circulation, cooling is obtained to a room located below the skylight. When this circulation is cut off, the skylight acts as a thermal insulator. Experimental verification confirms that temperatures below the ambient can indeed be realized with such a skylight. The dimensions of the skylight are optimized to provide an optimal cooling effect, and an optimal insulation effect when needed. The dimensions varied are the width and the height of the window. The problem is a multi-objective optimization problem as these two objectives are conflicting.

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Pages: 10 p.

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Details

  • Original title: Optimizing a design for a cooling or insulating skylight.
  • Record ID : 30010475
  • Languages: English
  • Source: Clima 2013. 11th REHVA World Congress and 8th International Conference on Indoor Air Quality, Ventilation and Energy Conservation in Buildings.
  • Publication date: 2013/06/16

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