Abstract
Increasingly more variable speed drive pumps are installed in water distribution systems worldwide. However, the modeling of variable speed drives in such networks remains difficult, especially in the context of mathematical optimization for pump scheduling. For the problem of energy usage minimization, formulated as a mixed integer program, we propose a new simplified convex relaxation of the hydraulic characteristics of a variable speed pump. By using different model approximations for the power curve, as a function of pump speed and volumetric flow rate, we study the trade-off in the computational complexity and quality of solutions obtained. We use two small benchmark networks and real pump data from three different pumps to calculate operating schedules. We show that these schedules, are computed in a time suitable for operational usage, enable operation with lower operating cost compared to fixed speed pumps, and their sub-optimality can be computed.
Original language | English |
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Title of host publication | World Environmental and Water Resources Congress 2016: Watershed Management, Irrigation and Drainage, and Water Resources Planning and Management - Papers from Sessions of the Proceedings of the 2016 World Environmental and Water Resources Congress |
Publisher | American Society of Civil Engineers (ASCE) |
Pages | 199-209 |
Number of pages | 11 |
ISBN (Electronic) | 9780784479858 |
DOIs | |
Publication status | Published - 2016 |
Externally published | Yes |
Event | 16th World Environmental and Water Resources Congress 2016: Watershed Management, Irrigation and Drainage, and Water Resources Planning and Management - West Palm Beach, United States Duration: 22 May 2016 → 26 May 2016 |
Conference
Conference | 16th World Environmental and Water Resources Congress 2016: Watershed Management, Irrigation and Drainage, and Water Resources Planning and Management |
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Country/Territory | United States |
City | West Palm Beach |
Period | 22/05/16 → 26/05/16 |