Optimization of systems of water supply and sewerage by minimizing their life cycle costs
https://doi.org/10.21285/2227-2917-2022-1-104-113
Abstract
When designing urban water supply and sewerage systems, the substantiation of pipeline diameters and velocities of the fresh and sewage water should be carried out. The existing approaches and regulatory requirements provided in SP 31.13330.2012 consider economic factors in terms of reduced costs for the construction and operation of water supply and sewerage systems. However, according to GOST R 587885-2019, the design option should be selected on the basis of its life cycle costs (LLC). In this regard, an LLC-based methodology for calculating the optimal values of pipeline diameters and velocities of the fresh and sewage water in pipelines is proposed. The study specifies the LLC of pipeline water supply and sewerage systems in the form of the flow rate and velocity functions of the transported fresh and sewage water. The first LLC derivative in terms of velocity is taken and set equal to zero. Further, the equation is solved relative to the velocity. As a result, formulas for calculating optimal pipeline velocity values for the fresh and sewage water relative to their LLC are obtained. The conducted numerical experiments demonstrate that the optimal values of fresh and sewage water velocities depend on the values of flow rate and electricity cost, as well as the number of years in the life cycle of water supply and sewerage systems. It is proposed to amend Appendix B of SP 31.13330.2012 by adding a substantiation of pipeline diameters based on the LLC of water supply and sewerage systems.
About the Authors
V. R. Chupin
Irkutsk National Research Technical University
Russian Federation
Competing Interests:
Russian Federation
Victor R. Chupin - Dr. Sci. (Eng.), Professor, Head of the Department of Urban Construction and Economy, Irkutsk National Research Technical University.
83 Lermontov St., Irkutsk, 664074
Competing Interests:
None
V. I. Mart'yanov
Irkutsk National Research Technical University
Russian Federation
Competing Interests:
Russian Federation
Vladimir I. Mart'yanov - Dr. Sci. (Phys. – Math.), Professor of the Department of Highways, Irkutsk National Research Technical University.
83 Lermontov St., Irkutsk, 664074
Competing Interests:
None
M. V. Matveeva
Irkutsk National Research Technical University
Russian Federation
Competing Interests:
Russian Federation
Maria V. Matveeva - Dr. Sci. (Econ.), Professor of the Department of Real Estate Expertise and Management, Irkutsk National Research Technical University.
83 Lermontov St., Irkutsk, 664074
Competing Interests:
None
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Review
For citations:
Chupin V.R., Mart'yanov V.I., Matveeva M.V. Optimization of systems of water supply and sewerage by minimizing their life cycle costs. Izvestiya vuzov. Investitsii. Stroitelstvo. Nedvizhimost. 2022;12(1):104-113. (In Russ.) https://doi.org/10.21285/2227-2917-2022-1-104-113
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