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UDC 628.12: 628.171.001.24
Kirsanov A. A., Kolchev V. N., Shmigol V. V., Chernosvitov M. D.
Research in Relift Pumping Stations
Summary
Results of the research in operation of relift pumping stations of Samara (water consumption, pressure in the suction and pressure pipelines) are presented. The aligned graphs of distribution of specific water consumption, an average value of factual specific water consumption and coefficients of irregularity, diagrams of annual and daily changes of water consumption are given. The comparison of results obtained with the standards in force is made. Values of specific consumption of 5 and 95% provision and also a probability of ingress of factual water consumption into the interval defined by the standard specifications are determined. The efficiency of the use of frequency regulation at intra-block pumping stations is substantiated.
Key words
water meter , head , pumping station , diagram of water consumption , hourly irregularity , frequency converter
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UDC 628.17.08:681.121
Lurie M. S., Lurie O. M.
Assessment of a Random Error of Vortex Flow Meters in the Course of Their Operation
Summary
Methods of the assessment of a random error of vortex flow meters and water meters in the course of their operation are considered. This methodology is based on the statistical treatment of measurements of instantaneous values of vortex formation of the flow meter placed in the working pipeline. The scheme of connection of the vortex flow meter implemented in the submerged variant reducing the cost considerably and making it possible to use these instruments for measurement of a flow rate in large diameter pipelines and open canals is presented.
Key words
water meter , flow meter , pipeline , measurement error , methods of error assessment
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UDC 628.179.34
Sheleshkov K. O.
Targeted energy audit of the industrial water mains and distribution networks
Summary
In 2016 «Ostec-SMT» Company carried out a targeted energy audit of the drinking water supply networks at a wood processing plant in Siberia. The audit covered the water mains and distribution pipelines supplying water to the plant. The heart of the problem is the excess water losses (35% of the total water amount supplied by the public water supply system). The annual difference between the water amount purchased from the water services company and that supplied to the customers is 400 thousand m3. In order to locate the leaks it was decided to carry out consecutive measurements of drinking water flow from the interface of inventory responsibility, at the nodal points and at the service connections. The discovered water imbalance between the adjacent points, and leaks were determined with the use of a correlation leak detector. After the work completion the balance of the drinking water supply of the plant was compiled, the sections with losses were pointed out, and their quantitative estimate was given. The integrated study carried out by the experts of «Ostec-SMT» LLC provided for the exhaustive information on the state of the entire water supply system of the plant. The plant where the targeted energy audit of the water mains and distribution networks was carried out had implemented over the last years a number of large-scale investment projects, commissioned new and upgraded operating capacities.
Key words
water meter , water treatment station , pumping station , water flow , domestic water supply , technical audit
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