Özet:

We carried out hydrothermal investigations of the flow-through reservoir-cooler with running water of the thermal power plant. The purpose of the study was to investigate a degree of silting of the flow-through reservoir-cooler of TPP for the operation period and an effect of morphometric changes of RC on its temperature and temperature of circulating water. The peculiarity of the circulating water supply of this thermal power plant is that two channels carry out the discharge of circulating water into the reservoir ‒ to the tail part of it and to the head part, near the water discharge facility. The volume of silting of the Dobrotvir reservoir during the operation period is 0.88 million m3, the total volume decreased by 9.6 %. The depths up to 2 m increased by 28 %. The area of the reservoir decreased by 1.56 km2 as a result of silting and overgrowth of coastal water area. Circulating water in the near water area of its discharge into the reservoir cools by 3‒4 оС, that is, by ≈50 % of the total value. Over the operation period, the near water area became shallow, but this did not affect temperature performance of the reservoir. We recommended the formula for forecasting a temperature of water discharged from flow-through reservoir to a river, which is important for the summer period. The discharge of circulating water for cooling by two channels ‒ to the upper and to the catchment water area of the flow-through reservoir-cooler increases its active area. It is possible to provide sanitary norms regarding the thermal pollution of the river below the reservoir-cooler by regulation of the discharge of deep layers of water by discharge facility in summer. The results of research can be useful for operation of reversible systems of technical water supply with reservoirs-coolers. They are important for regulation of redistribution of circulating water of a thermal power plant to a water area of a reservoir-cooler, as well as for operation of their discharge facilities in flow-through reservoirs. Author Biographies Nikolai Bosak, Lviv Polytechnic National University Bandery str., 12, Lviv, Ukraine, 79013 PhD Department of Hydraulics and Sanitary Engineering

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