Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 1477-1498 |
| Number of pages | 22 |
| Journal | Water Resources Management |
| Volume | 26 |
| Issue number | 6 |
| Early online date | 14 Jan 2012 |
| DOIs | |
| Publication status | Published - Apr 2012 |
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Keywords
- demand-driven analysis – Head-dependent modelling – head-flow relationship
- pressure-dependent demand
- pressure-deficient water distribution system
- EPANET extension
- demand-driven analysis
- head-flow relationship
- head-dependent modelling
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Pressure-dependent EPANET extension. / Siew, Calvin; Tanyimboh, Tiku.
In: Water Resources Management, Vol. 26, No. 6, 04.2012, p. 1477-1498.Research output: Contribution to journal › Article
TY - JOUR
T1 - Pressure-dependent EPANET extension
AU - Siew, Calvin
AU - Tanyimboh, Tiku
PY - 2012/4
Y1 - 2012/4
N2 - In water distribution systems (WDSs), the available flow at a demand node is dependent on the pressure at that node. When a network is lacking in pressure, not all consumer demands will be met in full. In this context, the assumption that all demands are fully satisfied regardless of the pressure in the system becomes unreasonable and represents the main limitation of the conventional demand driven analysis (DDA) approach to WDS modelling. A realistic depiction of the network performance can only be attained by considering demands to be pressure dependent. This paper presents an extension of the renowned DDA based hydraulic simulator EPANET 2 to incorporate pressure-dependent demands. This extension is termed “EPANET-PDX” (pressure-dependent extension) herein. The utilization of a continuous nodal pressure-flow function coupled with a line search and backtracking procedure greatly enhance the algorithm’s convergence rate and robustness. Simulations of real life networks consisting of multiple sources, pipes, valves and pumps were successfully executed and results are presented herein. Excellent modelling performance was achieved for analysing both normal and pressure deficient conditions of the WDSs. Detailed computational efficiency results of EPANET-PDX with reference to EPANET 2 are included as well.
AB - In water distribution systems (WDSs), the available flow at a demand node is dependent on the pressure at that node. When a network is lacking in pressure, not all consumer demands will be met in full. In this context, the assumption that all demands are fully satisfied regardless of the pressure in the system becomes unreasonable and represents the main limitation of the conventional demand driven analysis (DDA) approach to WDS modelling. A realistic depiction of the network performance can only be attained by considering demands to be pressure dependent. This paper presents an extension of the renowned DDA based hydraulic simulator EPANET 2 to incorporate pressure-dependent demands. This extension is termed “EPANET-PDX” (pressure-dependent extension) herein. The utilization of a continuous nodal pressure-flow function coupled with a line search and backtracking procedure greatly enhance the algorithm’s convergence rate and robustness. Simulations of real life networks consisting of multiple sources, pipes, valves and pumps were successfully executed and results are presented herein. Excellent modelling performance was achieved for analysing both normal and pressure deficient conditions of the WDSs. Detailed computational efficiency results of EPANET-PDX with reference to EPANET 2 are included as well.
KW - demand-driven analysis – Head-dependent modelling – head-flow relationship
KW - pressure-dependent demand
KW - pressure-deficient water distribution system
KW - EPANET extension
KW - demand-driven analysis
KW - head-flow relationship
KW - head-dependent modelling
UR - http://link.springer.com/journal/11269
U2 - 10.1007/s11269-011-9968-x
DO - 10.1007/s11269-011-9968-x
M3 - Article
VL - 26
SP - 1477
EP - 1498
JO - Water Resources Management
JF - Water Resources Management
SN - 0920-4741
IS - 6
ER -