Research on Clay-Cement Concrete in Anti-Filtration Elements of Earth Dams at Freeze-Thaw Temperatures

Power Technology and Engineering - This article presents and analyzes the results of a study on the frost resistance of clay-cement concrete used for repairing the anti-filtration element of the...     

Reconditioning of the pressure face of the waterworks facility on Sytykan River

The possibility of creation of a frozen-ground curtain in permeable soils with a permeability of 800 – 900 m-day with the help of a liquid system with forced circulation of kerosene is shown.Translated from Gidrotekhnicheskoe Stroitelstvo, No. 12, December 2004, pp. 14 – 22.     

Coefficients of heat and mass transfer of current-technology sprinklers for process computations of cooling towers

Analysis of formulas for computing coefficients of heat and mass transfer derived on the basis of results of laboratory tests of 22 sprinklers is used to show that the classification of sprinklers into film and drop ones can be based on a physically grounded parameter m, i.e., the exponent in the formula for the evaporation number K _ev = A _pλ^m (or for the Merkel number Me = A _xλ^m). Ageneralized formula describing the dependence of the coefficients of heat and mass transfer on the height of the sprinkler is derived, which makes it possible to determine the optimum sprinkler height in cooling tower design. The accuracy of the formulas for computing the coefficients is confirmed by a comparison of experimental and computed values of the temperature of cooled water in the cooling tower of the Novo-Ryazanskaya cogeneration plant. __________ Translated from élektricheskie Stantsii, No. 2, February 2006, pp. 24–30.