Water demand varies rapidly with both time and
local pressure, which strongly influences surge
response in the distribution system. The constant or
pressure-insensitive demand model frequently used
for surge analysis ignores the pressure-sensitive
characteristic inherent in actual networks. The
assumption of constant demand can exaggerate the
magnitude of a surge wave in the system, which
may lead to overdesign of surge-protection devices
and unnecessary costs. Results from a comparative
study indicated that replacing the pressure-insensitive
demand model with a pressure-sensitive orifice
model facilitates a more accurate estimate of water hammer
phenomena as well as proper assessment
and cost-effective selection of strategies for surge
protection and control.
Enhancement of distribution system operation
and management is a principal benefit of the proposed
demand model. Many water utilities are facing
upgrades and modifications needed to improve
system performance and protect public health. Good
management decisions based on sound modeling
procedures will be required if these improvements
are to be effective and economical. Includes 31 references, tables, figures.
| Edition : | Vol. 101 - No. 4 |
| File Size : | 1
file
, 870 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 12 |
| Published : | 04/01/2009 |
