Special issues on design water AFEI

Abstract

The main principal differences between the coefficient of productivity and the K-factor are considered. The formulas for the conversion of the K-factor expressed in the American and European system of units in the coefficient of productivity used to determine the parameters of the dictating and subsequent irrigators in the hydraulic calculations of distribution networks AFEI (automatic fire extinguishing installation) by the method given in Set of rules 5. 13130.2009. The algorithm of selection of hydraulic scheme of distribution of networks AFEI dicates of the sprinkler and dictating the protected area. The difference between the normative, permissible and average intensity of irrigation is noted. The article presents the variation of both the total flow rate of the AFEI and the flow rate of each sprinkler located above the protected area with successive activation of the sprinklers. It is shown that the flow rate and, consequently, the intensity of irrigation of the dictating irrigator, if it was the first one, is several times higher than the calculated values. As the activation is the lasting of sprinklers located above the protected area, the flow rate is reduced and when triggered last adopted in the calculation of the sprinkler, the parameters dictating and subsequent sprinklers is equal to the estimated.