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Life‐cycle energy analysis of performance‐ versus age‐based pipe replacement schedules
Although many North American water utilities are upgrading their systems through both regular maintenance programs and additional pipe replacement, rarely does this process take whole‐of‐life considerations into account. This article details the development of a life‐cycle energy analysis that accounts for energy associated with reducing leakage through pipe replacement and describes its implementation at a large water distribution system. Energy used in pumping was compared with the embodied energy tied to pipe replacement in a baseline scenario and three replacement plans. Results indicated that the annual operational energy savings of 4.9 × 10 to 6.4 × 10 kW·h achieved by 2020 comes at a cost. The embodied energy invested in replacing pipe stock for ductile‐iron pipes with diameters of 6 to 16 in. would be 0.88 × 10 to 2.05 × 10 kW·h/mi, a significant expense that results in an initial energy payback period of 17.6 years for the most aggressive replacement plan.
Life‐cycle energy analysis of performance‐ versus age‐based pipe replacement schedules
Although many North American water utilities are upgrading their systems through both regular maintenance programs and additional pipe replacement, rarely does this process take whole‐of‐life considerations into account. This article details the development of a life‐cycle energy analysis that accounts for energy associated with reducing leakage through pipe replacement and describes its implementation at a large water distribution system. Energy used in pumping was compared with the embodied energy tied to pipe replacement in a baseline scenario and three replacement plans. Results indicated that the annual operational energy savings of 4.9 × 10 to 6.4 × 10 kW·h achieved by 2020 comes at a cost. The embodied energy invested in replacing pipe stock for ductile‐iron pipes with diameters of 6 to 16 in. would be 0.88 × 10 to 2.05 × 10 kW·h/mi, a significant expense that results in an initial energy payback period of 17.6 years for the most aggressive replacement plan.
Life‐cycle energy analysis of performance‐ versus age‐based pipe replacement schedules
Prosser, Monica E.E. (author) / Speight, Vanessa L. (author) / Filion, Yves R. (author)
Journal ‐ American Water Works Association ; 105 ; E721-E732
2013-12-01
12 pages
Article (Journal)
Electronic Resource
English
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