TY  - BOOK
AU  - Gaurino,Bienvenido G.
AU  - Orth,H.M.
AU  - Lohani,B.N.
AU  - Nguyen,Cong Thanh
ED  - US-ASEAN Development Cooperation Program,
TI  - Development of an optimization model for the distribution of pumping stations in a water distribution network
T2  - Thesis
PY  - 1983///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Water quality management
KW  - Nepal
KW  - Phewa Lake
N1  - A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering; Thesis (M.Eng.) - Asian Institute of Technology, 1983
N2  - A 'Screening model' has been formulated for the optimal distribution  of pumping stations using the linear programming technique. The model  provides guidelines on the selection of optimal sites for booster pumping  stations from a number of candidate locations. The application of the  screening model on three sample networks, each with nine candidate locations  for booster pumping station which could be chosen in 511 different combi-  nations, indicated that two to four program runnings are sufficient to  arrive at an optimal distribution. The model has been found out to be  applicable to large networks by schematizing the network extensively for the  first run. The succeeding sets of runs could be made on the less exten-  sively schematized subnetworks which are to be isolated by closed valves.  The study has proven that in some networks the use of valves to isolate  subnetworks may be necessary not only in reducing the sytem cost but also in  making a design option feasible in conjunction with the use of booster pumps.  A related problem of distributing the operational storage requirement  has been dealt with in this study. To solve the problem, a simulation study  was conducted on a simple network with one off-line booster by varying the  rated capacity of the source pumps as well as the design flows of the pipes  leading to the booster from the peak hour demand down to the lowest possible  flow rate, i.e. to a value just enough to meet the demand pattern. The re-  servoir at the off-line booster was sized correspondingly (increased as flow  rate decreased) to the storage requirement of the downstream service area at  each variation. The system cost for each variation was solved using a linear  optimization model. The results have shown that the lower extreme of flow  rate with the corresponding upper extreme of storage requirement at off-line  boosters makes the optimum design. This finding was confirmed in the same  study made on two large sample networks. Incidentally, it was found out that  for a large. network and high service pressure requirement, the system cost  could be .reduced further by using separate transmission lines to fill up the  reservoirs at booster pumping stations
ER  -