Results 161 to 170 of about 274,826 (197)

Numerical modelling of the priming of a siphonic rainwater drainage system

Building Services Engineering Research and Technology, 1999
The operation of siphonic rainwater systems, and in particular their priming action, is described. Current industry recognised design procedures are discussed. The initial priming of a test facility developed to replicate current design practice is described in detail, and related to the expected performance of systems installed in the field.
S. Arthur, J.A. Swaffield
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Siphonic roof drainage systems—priming focused design

Building and Environment, 2007
Abstract This paper represents the most thorough examination of siphonic system priming to date. Data is presented which has been obtained from a number of systems. The text details the priming of siphonic roof drainage systems, and outlines how knowledge of the priming process, if considered at the design stage, may be used to improve the ...
S. Arthur, G.B. Wright
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Plastic pipe pressures in siphonic roof drainage systems

Building Research & Information, 2011
Siphonic roof drainage is a highly efficient type of drainage system that is particularly suitable for large buildings and other structures over approximately 4 m in height. Although siphonic roof drainage systems are enjoying ever-increasing popularity with architects, there is still some uncertainty regarding the minimum pipe pressure class required ...
Lucke, T, Arthur, S
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Cavitation, aeration and negative pressures in siphonic roof drainage systems

Building Services Engineering Research and Technology, 2009
The main purpose of this study was to examine negative pressures in siphonic downpipes and to see whether these can be controlled through breaking the siphonic action by injecting air at certain points in a vertical downpipe. The study also investigated cavitation and its propagation through a prototype scale siphonic system.
Lucke, T, Beecham, S
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The Design of Conventional and Siphonic Roof‐Drainage Systems

Water and Environment Journal, 1997
AbstractThe hydraulic principles governing the performance of conventional and siphonic roof‐drainage systems are described and compared. The flow rate in a conventional system is determined by the depth of water in the gutter or on the roof. Siphonic systems are able to achieve higher flow rates because they make full use of the head available between
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Capacity loss in siphonic roof drainage systems due to aeration

Building Research & Information, 2010
An experimental investigation into air entrainment in siphonic roof drainage systems is presented. By injecting known quantities of air into a 4.7 m high experimental test rig, the effect of aeration on flow velocity and flow capacity in the siphonic system was determined.
Lucke, T, Beecham, S
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Aeration and gutter water levels in siphonic roof drainage systems

Building Research & Information, 2010
An investigation is presented into how negative system pressures, the degree of aeration, and gutter water levels are affected by the number of outlets in a siphonic roof drainage system. The experimental results show that system pressures decrease if outlets are blocked.
Lucke, T, Beecham, S
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The performance characteristics of multi-outlet siphonic roof drainage systems

Building Services Engineering Research and Technology, 2002
Siphonic roof drainage systems have been in existence for approximately 30 years, and are becoming an increasingly common element of urban drainage infrastructure. In that time, the construction sectorin most developed countries have been gradually persuaded of the benefits that these systems offer when compared to conventional roof drainage ...
G B Wright, J A Swaffleld, S Arthur
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Experience with Drainage and Ground Stabilisation by Siphon Drains in Slovakia

2013
Drainage in the engineering practice is often used for stabilizing of instable areas. According to consumption of energy, the methods can be divided into two groups. Traditional methods of drainage without need of energy, i.e. using gravity, are usually limited by its maximal depth of 3–5 m (as gravel drains).
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Application of Negative Pressure Drainage and Siphon Drainage in Gastrointestinal Surgery

Foreign Language Science and Technology Journal Database Medicine and Health, 2022
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