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Evaluation of the photocatalytic decomposition effect on the improvement of IAQ by new ventilation index: Net Escape Velocity.

Number: pap. 964

Author(s) : LIM E., ITO K., SANDBERG M.

Summary

Net Escape Velocity (hereafter NEV) is a new index for evaluating ventilation efficiency. It represents the effective velocity scale with regard to purging/diluting a contaminant from a certain point within a room. NEV is determined by the average contaminant concentration and the convection and diffusion flux at a particular point. NEV can identify the convection and diffusion effect of contaminant transportation in order to define that concentration at a particular point using one representative velocity scale. The use of building materials coated with a photocatalyst is an effective way to optimize the ventilation rate and to improve/maintain indoor air quality (IAQ). However, to improve IAQ will necessitate a qualitative and quantitative performance evaluation of building materials along with the photocatalytic decomposition effect. The purpose of this paper is to demonstrate and evaluate the contaminant concentration reduction mechanism of photocatalytic materials from an indoor using the concept of NEV.

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Pages: 10 p.

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Details

  • Original title: Evaluation of the photocatalytic decomposition effect on the improvement of IAQ by new ventilation index: Net Escape Velocity.
  • Record ID : 30010401
  • 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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