MURAL - Maynooth University Research Archive Library

    Spatial homogeneity of air in a mushroom tunnel: Single vs. boost duct air distribution systems

    Martin, David and Ringwood, John and Grant, James J. (2001) Spatial homogeneity of air in a mushroom tunnel: Single vs. boost duct air distribution systems. ASHRAE Transactions, 107. pp. 275-284. ISSN 0001-2491

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    Air can become stratified in a standard mushroom tunnel using a single-duct air distribution system. Stratification can be overcome by increased air circulation, such as the addition of a secondary air distribution duct, i.e., a boost duct air distribution system. To compare the performance of both systems, this study measured the spatial variation in climate for both systems. Air temperature, humidity, and speed were monitored at representative locations in one-half of the tunnel, as bilateral symmetry in air distribution has been previously observed. The experiments, including replicates, were conducted for both full recirculation and fill fresh air A vertical mean air temperature difference of 0.22 deg C was observed for the boost air distribution system and 2.22 deg C for the single air distribution system. No significant longitudinal difference was observed for either system. The lower vertical air temperature difference of the boost system shows its superior mixing performance.

    Item Type: Article
    Keywords: spatial homogeneity; mushroom tunnel; Single vs. boost duct air distribution systems;
    Academic Unit: Faculty of Science and Engineering > Electronic Engineering
    Faculty of Science and Engineering > Research Institutes > Centre for Ocean Energy Research
    Item ID: 16324
    Depositing User: Professor John Ringwood
    Date Deposited: 15 Jul 2022 10:20
    Journal or Publication Title: ASHRAE Transactions
    Publisher: American Society of Heating, Refrigeration and Air Conditioning Engineers, Inc.
    Refereed: Yes
    Use Licence: This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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