An Accurate Leakage Localization Method for Water Supply Network Based on Deep Learning Network

In the water supply network, leakage of pipes will cause water loss and increase the risk of environmental pollution. For water supply systems, identifying the leak point can improve the efficiency of pipeline leak repair. Most existing leak location methods can only locate the leak point approximately to the node or pipe section of the pipe network, but cannot locate the specific location of the pipe section. This paper presents a framework for accurate location of water supply network leakage based on ResNet. The framework is to pinpoint leaks to specific locations along the pipeline. The leakage of two kinds of pipe networks is simulated. For a pipe network containing 40 pipes, the positioning accuracy of the pipe section is 0.94, and the MSE of the specific location of the leakage point is 0.000435. For the pipe network containing 117 pipes, the positioning accuracy of the pipe section is 0.91, and the MSE of the specific location of the leakage point is 0.0009177, and the leak location ability under different sensor arrangements is analyzed. Experiments verify the robustness and applicability of the framework.

Circulation management in hot water supply systems

The compliance of the actual heat consumption for heating cold water for public hot water supply service with the approved standard has been analyzed. Using passive engineering experiments, we studied the operating modes of hot water supply systems for several groups of houses, in which different methods for regulating water consumption in hot water supply systems were used. Data were collected using online energy monitoring and commercial metering system. Features of the static and dynamic load regulation of hot water systems have been investigated. The effect of methods for regulating the heat load of hot water supply systems on their actual heat consumption has been analyzed. An assessment has been made of the possibility of bringing the actual operating mode of the hot water systems to the specified value which is the basis for calculating the consumption rate. Ways to improve the efficiency of hot water supply systems have been determined. Conclusions have been drawn concerning the need to revise the standardized indicators of hot water quality and adjust the methodology for calculating the consumption rate in hot water supply systems.

Improving a heat supply system by increasing the efficiency of the heat pump unit

The reliability and efficiency of the operation of district heating systems is largely determined by the efficiency of preparation of heating network water. In open heat supply systems, make-up water, among other things, compensates for the water intake in hot water supply systems. A number of technologies have been developed that increase the efficiency of an open heat supply system by reducing the water consumption in the supply pipeline of the heating network, increasing the operating time of the heat pump, and increasing the specific generation of electricity for heat consumption at the CHP plant due to additional cooling of the network water in the return pipe of the heating network.

REHABILITATION AND OPTIMIZATION OF THE WATER SUPPLY DISTRIBUTION NETWORK OF DURRES-ALBANIA

The condition of the water supply and the actual functioning of the distribution network in Durres area are inadequate to sustain demand at an acceptable level of service for all the billing zones.The distribution network of Durres city is fed at one point (Xhafzotaj junction) for 300-350 l/s with an elevation of about 50 m asl. The planned new transmission line has a diameter of 700 mm and will bring extra 630 l/s.The water distribution systems are one of the vital urban infrastructures and their operationwith a high level of service are of high importance.Many phenomena in water supply systems such as leakage, breakage of pipes etc. are afunction of pressure. When pressure dependency of demand is considered in the hydraulicanalysis, the results thereof shall be consistent with reality.This article presents the new design methodology for a good optimization of the distribution network. The distribution network has been reconstructed as a ring network. It is planned to build 6 DMAas (District Metered Area) to control the flow, pressure and consumption in DMA to build the Water Balance.

ASSESSMENT OF THE CONDITION OF THE POLTAVA REGION WATER SUPPLY COMPLEX

Assessment of the state and rationality of the operation of the water management complex (WMC) of the Poltava region is an extremely relevant study of the present, since the WMC was created in the 60s-70s of the last century and actively provides the sectors of the economy and the population with water resources. The study aim is to assess the water resource potential as the basis for the functioning of the water-chemical complex, to determine the levels of technogenic impact on the water resource potential. A review of the sources was carried out using the Google Scholar database by filtering for the period from 2010 to 2021 and mainly revising publications on numerous samples related to monitoring and control of the state of the water management complex of the Poltava region. According to the official report of 2019, the rivers Dnieper, Psel, Sukhoi Omelnik, Uday received an assessment: slightly polluted waters, the Vorskla and Orzhitsa rivers are moderately polluted waters. The main ingredients responsible for the low water ratings as of 2019 are phosphate ions, manganese, as well as nitrite nitrogen, total iron and BOD5. The manganese content was measured in three rivers, and the average estimate ranged from 5.8 in the Psel River to 11.85 in the Vorskla River. According to the Regional Office of Water Resources in the Poltava region, in 2019, 109.8 million m3 were withdrawn from the natural water bodies of the Poltava region, namely underground water bodies, which is 4.6 million m3 less than in 2018 (or 4.0 %), including 69.83 million m3 (which is 3.29 million m3 or 4.5 % less than in 2018). However, the total water intake in the region over the past 10 years has decreased by 2.2 times. A positive trend is that all discharges occur at treatment facilities of housing and communal services. There is no discharge of return water without treatment into surface water bodies of the Poltava region; however, within the boundaries of settlements there is a discharge of under-treated municipal wastewater and runoff from the urbanized territory. Consequently, balancing water use is possible by introducing waterless, low-water and water-saving technologies in all sectors of the economy, maximum use of water in recycling water supply systems; replacement of physically and morally worn out water supply and water protection equipment, etc.