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The Dependence of the Ratio of Minor Loss to Total Loss on Extent of Duct Run in Ventilation Systems

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2017

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
Due to the absence of statistical basis of various suggested methods for approximating the fraction of pressure loss due to fittings in ventilation index duct runs, regression analyses were done for predicting the fraction for the varying system parameters of length of duct run and number of air intake terminals. This paper evaluates the validity of the regression equations by comparing their results with those of another ventilation configuration. It is observed that the equations are not adequately representative of other ventilation systems. However, for a given ventilation network, an average fraction of loss due to duct fittings may be applied to the various duct runs in order to aid the approximation of the fitting loss. Such an average may be obtained by an initial analysis of a few duct runs of the ventilation network. All the ventilation layouts studied further show that the fitting loss constitutes the major fraction over the frictional loss.
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  • 12
160
165
  • English

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