Demands of several consumers are lumped and assumed to be concentrated at the nodes of primary (skeletonized) network. Usually, NHFRs similar to that at actual withdrawal point are considered for the nodes on skeletonized network also. Gupta and Bhave (1996b) discussed and argued that pressure requirement at a node on primary network is to overcome the friction losses in pipes of secondary network as well as due to elevation differences between node on primary network and secondary network. Thus, NHFR would be different at different nodes. The NHFRs at different nodes of skeletonized network are developed by analyzing the secondary networks at different heads. A comparison of performance of entire network with skeletonized network in two cases: (1) Common NHFR at different node; and (2) actual NHFRs at different nodes, has been made for few example networks. The performance of skeletonized network with actual NHFRs matched more closely with that performance of full network.
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