You are here

Home » Content

On the Approximation of Pressure Loss Components in Air Conditioning Ducts

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2017

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
Various methods proposed for approximating the total pressure loss in fittings of index duct runs of air conditioning systems are observed to be inappropriate. Regression analyses had, therefore, been done on an air distribution configuration which resulted in relationships between the fitting loss fraction, on one hand, and the variables of length of duct run and number of air outlet terminals, on the other hand. Also, other case studies had earlier been done in which the variation of total duct fitting loss fraction with changing system parameters had been investigated. The present study compares the regression analysis results with those of the other case studies; with the conclusion that the regression results are not representative enough to be applied to other air distribution configurations. However, for approximation purposes, the fitting loss fraction for an index run may be estimated by using the average values of a few duct runs in any given installation. Furthermore, it is observed that referring to the fitting loss as ‘minor’ is a misnomer as this loss constitutes a larger fraction than the frictional loss in all the duct configurations studied.
Bookmark/Search this post with
FULL TEXT (PDF): 
PDF icon arastirmax-approximation-pressure-loss-components-air-conditioning-ducts.pdf
  • 12
128
141
  • English

REFERENCES

References: 

[1] J. I. Sodiki, Standardized Static Pressure Curves for Air Conditioning Fan Selection, International Journal of Science and Engineering Investigations, Vol. 3, Issue 27, Pp. 10 – 16, 2014
[2] A. Bhutia, HVAC Ducting – Principles and Fundamentals, Technical Paper, Viginia : PDH Centre, 2012
[3] V. Hanby, Combustion and Pollution Control in Heating Systems, London: Springer – Vergal, 2012
[4] R. Giles, J. Evett and C. Liu, Fluid Mechanics and Hydraulics, New York: McGraw – Hill Book Co., 1993
[5] J. C. Church, Practical Plumbing Design Guide, New York: McGraw – Hill Book Co., 1979
[6] R. Barry, The Constructionn of Buildings Vol. 5: Building Services, Oxford: Balckwell Scientific, 1998
[7] B. Boman and S. Shukla, Hydraulic Considerations for Citrus Microirrigation, Technical Paper, Department of Agricultural and Biological Engineering, Florida: University of Florida, 2015
[8] Spirax Sarco Ltd. Piping Sizing – Saturated Steam, Technical Paper, Gloucestershire, 2017
[9] W. W. Grainger Inc., Ventilation Fundamentals, Techincal Paper, Illinois, 2005
[10] J. I. Sodiki, Statistical Modeling of Head Loss through Duct Fittings in Conditioned Air Distribution Systems, British Journal of Applied Science and Technology, Vol. 6, No. 1 Pp. 49 – 61, 2015
[11] J. F. Douglas, Solutions to Problems in Fluid Mechanics Part 2, London: Pitman Publishing Ltd., 1978
[12] Carrier Air Conditioning Co., Air Conditioning Engineering Part 2: Air Distribution, New York: McGraw – Hill Book Co., 1972
[13] P. S. Desai, Modern Refrigeration and Air Conditioning for Engineers, New Delhi: Khana Publishers, 2007
[14] J. I. Sodiki and E. M. Adigio, Validation of Regression Models for the Fraction of Fitting Loss in Index Pipe Runs (Part 1: Water Distribution with Buildings), International Journal of Science and Engineering Investigations, Vol. 6, Issue 70, Pp. 28 – 42, 2017
[15] J. J. Barton, Principals and Practice of Heating and Ventilating, London: George Newnes Ltd., 1964
[16] C. Lipson and N. J. Sheth, Statistical Design and Analysis of Engineering Experiments, New York: McGraw – Hill Book Co., 1973
[17] J. I. Sodiki, Head Loss Components in Conditioned Air Branch Ducts, International Journal of Academic Research, Part A. Applied and Natural Sciences, Vol. 6, No. 6, Pp. 388 – 394, 2014
[18] J. I. Sodiki, An Analysis of Pressure Losses in Conditioned Air Distribution: Case Study of an Industrial Cafeteria, International Journal of Engineering Works, Vol. 2, Issue 3, Pp. 32 – 41, 2015
[19] J. I. Sodiki, The Head Loss Ratio in Conditioned Air Distribution: Case Study of an Office Block, European Journal of Engineering and Technology, Vol. 3, No. 5, Pp. 17 – 27, 2015
[20] J. I. Sodiki and E. M. Adigio, Validation of Regression Models for the Fraction of Fitting Loss in Index Pipe Runs (Part 2: Water Distribution to Groups of Buildings), International Journal of Science and Engineering Investigations, Vol. 6, Issue 70, Pp. 43 – 54, 2017.

Thank you for copying data from http://www.arastirmax.com