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Efficient ventilation: displacement ventilation and air curtain zoning.

Author(s) : SKISTAD H.

Summary

Displacement ventilation with thermal stratification has been developed for non-industrial premises since the early 1980s. After an enthusiastic start, the market for displacement ventilation in Scandinavia has matured and stabilised. Several benefits have been proved, but there have also been faulty designs and installations. This presentation gives an overview of the principles, possibilities and limitations. The aim of developing displacement ventilation was to achieve a more efficient system. In some cases, however, such as where there is smoking in crowded spaces, we have to think differently to achieve the most efficient ventilation. This had led to use of establishing separate zones within one room, without walls to separate the zones. An air curtain is used to help separate the zones. Currently, there are two prototype installations; one in a combined bar and restaurant in Trondheim and one in a bar on a car ferry. Nicotine tests have shown that the installations protect the employees and the non-smoking guests within the TLV-values that are enforced by the government.

Details

  • Original title: Efficient ventilation: displacement ventilation and air curtain zoning.
  • Record ID : 2005-0317
  • Languages: English
  • Publication date: 2003/09/24
  • Source: Source: CIBSE-ASHRAE, Proc. jt. Conf. Build. Sustain. Value Profit Conf., Edinburgh
    17 p.; fig.; tabl.; 7 ref.

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