Abstract
<p>A characteristic feature in the operation of hydroelectric power plants is their technological ability to promptly and quickly change the generation of electricity. By this quality, they fundamentally differ from thermal and nuclear power plants, which require a stable operating mode. The population of large cities consumes electricity very non-uniformly throughout the day: consumption is minimal at night and maximum in the morning and afternoon. To ensure this non-uniformity, it is very convenient to use hydroelectric power plants. The non-uniformity of power generation on them is determined by the non-uniformity of the discharge of water from the upper pools to the lower ones. Sharp changes in the discharge of water through the dams of hydroelectric power plants affect the hydrodynamic regimes of not only the lower, but also the upper pools. For the city of Perm, the hydrodynamics of the upper pool of the Kamskaya HPP is of particular importance, since the main drinking water intake of the city of Perm - the Chusovskoy wastewater treatment plant (ChOS) is located there.</p><p>The high sensitivity of the quality of the water withdrawn at the ChOS to the hydrodynamic regime in the upper pool of the Kamskaya HPP is due to the fact that in the winter period the hardness of the withdrawn water is largely determined by the peculiarities of the confluence of the Chusovaya and Sylva rivers [1]. In order to objectively assess the impact of the operation of the hydroelectric power plant on the quality of the water taken under these conditions, a complex of coupled field studies and computational experiments in 3D formulation was carried out. In the course of field studies, daily measurements of the hydrodynamic characteristics of the flow and fluctuations of temperature and specific electrical conductivity of water were carried out using a flow rate meter MIDAS ECM manufactured by Valeoport. Computational experiments were carried out using the commercial package ANSYS FLUENT. The studies carried out not only proved the importance of the influence of the intraday irregularity of the HPP operation on the hydrodynamic and hydrochemical regimes of the upper pool of the hydroelectric complex, but also made it possible to work out the technology for its minimization.</p><p>The study was supported by the Russian Science Foundation (grant 17-77-20093) and by the Russian Foundation for Basic Research (RFBR) and Perm Krai (grants 19-41-590013 and 20-45-596028).</p><p>1. Lyubimova T., Lepikhin A., Konovalov V., Parshakova Ya., Tiunov A. Formation of the density currents in the zone of confluence of two rivers. Journal of Hydrology. 2014. Vol. 508. pp. 328-342.</p>
Published Version
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