Tag:electric power

№6|2018

DESIGNING WATER SUPPY SYSTEMS

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UDC 696.11

Butko D. A., Danekiants A. G., Mel’nikov I. S.

Choosing the optimal water supply schematic for a high-rise building

Summary

The task of enhanced studying scientific substantiation of the selection of a water supply system schematic with the development of criterial indicators (parameters) of optimization is formulated. The analysis of the state of real estate construction market provided for making a substantiated choice of a model building for which seven different versions of water supply schematic were designed and hydraulic and technical and economic calculations were made. The core indicators of reliability were calculated with the use of three methods. The significance coefficients are proposed that determine the degree of impact of a single assembly failure on the general system robustness. The regularities of the fitting failure-free operation probability changing with increasing the number of storeys in a building were determined. An algorithm of choosing an applicable water supply schematic was drawn up that was based on the question-answer method and took into account the basic data on the number of storeys, pressure limitations, building design features, redundancy possibility and (or) necessity as well as additional equipment installation. The optimization parameters were determined: material characteristics, reliability and energy consumption. To solve the formulated task a uniform integral equation of reliability-economic index is proposed. The coefficients and all relevant numerical values assumed depending on the schematic under considera­tion are cited. Inserting basic data into the equation provides for the coordinates for definition domain development. Each schematic in view of its specificity has a definite range of values (definition domain).

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№8|2012

POWER RESOURCES CONSERVATION

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UDC 628.292.003.13

Bazhenov V. I.

Customer benefit from the practical application of «7 = 2» initiative

Summary

The method of selecting pumping equipment by Life Cycle Cost (LCC) criterion – total cost of ownership is presented. The software that provides for calculating LCC criterion depending on the pump output is placed at www.7-2.su Web site. Submersible pumps are selected as a LCC calculation object because of their wide use at the sewage pumping stations under construction or subject to upgrade.

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№6|2010

RESOURSES SAVING

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UDC 628.2:621.311.16+654.032.3

Avendin A. P., Filimonov A. V., Shatalov V. S.

Economic Appropriateness of Two-Rate Tariff of Payment for Energy at a Sewage Pumping Station

Summary

Conditions under which the payment for energy consumed by the sewage pumping station according to the two-rate tariff would be reasonable economically are considered. The payback period of modernization is determined on the example of the concrete pumping station.

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№1|2011

RESOURCE CONSERVATION

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UDC 628.3:658.26.004.18

DANILOVICH D. A.

Energy conservation and alternative power sources at the wastewater treatment facilities

Summary

Methods of improving power efficiency of the municipal wastewater treatment facilities and heat and electrical power generation with the use of renewable power resource of wastewater. The analysis of power conservation and generation in water supply and wastewater management shows that depending on the technical solutions applied the total balance of power consumption at the water and wastewater facilities can vary from the net electrical energy consumption of 4 MW per 100 000 m3 of wastewater/day to positive balance of 7,5–8 MW (owing to 16 MW power generated including 1 MW of electrical energy). The power consumption of two independent municipal wastewater treatment plants can differ more than 6 times.

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