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A decentralized mechanical ventilation system with heat recovery: experimental assessment of thermal comfort and pollutant removal ability.

Number: pap. 934

Author(s) : AJAJI Y., ANDRÉ P.

Summary

In decentralized mechanical ventilation, air supply being very close to exhaust, a short-circuit from supply towards the extraction point may occur, increasing energy consumption and decreasing air diffusion quality. To estimate this quality together with thermal comfort, we measured in a climatic chamber, thermal comfort parameters and local ventilation effectiveness for temperature, at 12 locations and 3 heights within the occupied zone, for 4 ventilation regimes and 3 thermal configurations of the climatic chamber. We also assessed the system ability to remove carbon dioxide. The results show that the maximum air velocity measured is 0.12m/s, the predicted mean votes fluctuate from -0.8 to -0.5 and local ventilation effectiveness is from 0.94 to 1. In addition, the decentralized system maintains carbon dioxide concentration below 1250ppm for most configurations tested. The predicted mean votes are quite low because the heating set point is also quite low: 20°C. We conclude that no thermal discomfort can be felt, the system has a great ability to remove pollutants, and the risk that a short-circuit occurs is low.

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Pages: 11 p.

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Details

  • Original title: A decentralized mechanical ventilation system with heat recovery: experimental assessment of thermal comfort and pollutant removal ability.
  • Record ID : 30010218
  • 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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