Causes of Heat Networks Damageability

Titov, Gennadiy I.; Novopashina, N A; Titov, Vyacheslav G.

doi:10.17673/vestnik.2016.02.4

Cited by 3 publications

(2 citation statements)

References 3 publications

(3 reference statements)

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“…Mach number D Z 0 , which is a flow rate ratio of the speed of sound in this stream, will not exceed 1.5. Given that the intensity of the pressure surge (from 1 5 to 2 5 ) is proportionate to the square of the Mach number, the pressure after the surge in the apparatus may be several times higher than the pressure of steam and water before it, i.e. the ratio In the apparatus Mach number 1 !…”

Section: Discussionmentioning

confidence: 99%

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The use of energy saving technology as the basis for the state program implementation

Novopashina

Puring

2017

MATEC Web Conf.

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Abstract. The article views prospects of application of energy-saving technology in heat sources and plants that consume thermal energy in the form of steam and hot water. This technology involves creation of a twophase medium in the transonic jet nozzle apparatus. The effectiveness of the transonic jet nozzle apparatus is compared with the recuperative heat exchangers effectiveness. The use of these devices allows to obtain economic benefit by reducing the required building volume to accommodate the transonic jet nozzle apparatus, increasing performance coefficient compared with conventional recuperative heat exchangers and reducing operating costs. Two operation modes are considered: "pumpboiler" and "boiler". The most effective is "pump-boiler" mode, because, in this case, more energy saving is obtained through acting powerful network pumps only as launchers. An example of the use of transonic jet nozzle devices in the Samara region is given in the article. The trends and opportunities to solve the task controlling thermobaric parameters by changing the volume fraction of steam in the two-phase medium are studied.

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Section: Discussionmentioning

confidence: 99%

“…Given the sharp increase in energy prices, structural and technological redevelopment of production activities on the basis of new energy-saving technologies, allowing to abandon the metal-intensive, inefficient, outdated equipment should become the main priority of reforms in energy-consuming industries [1][2].…”

Section: Introductionmentioning

confidence: 99%

The use of energy saving technology as the basis for the state program implementation

Novopashina

Puring

2017

MATEC Web Conf.

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Causes of defects of the heating network

Zelentsov

2022

Urban construction and architecture

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The errors that occurred during the design of a channelless heat network and led to defects in the process of functioning of the heat supply system are considered and analyzed. To determine the cause of defects, the work performed was checked for compliance with the adopted design decisions, as well as an analysis of the design decisions themselves. It was found that the cause of defects during operation are errors in the adopted design decisions.

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Assessment of the State and Analysis of Damageability of Heating Grids Pipelines

Panteley¹

2018

Izv. vysh. ucheb

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Heating grids are intended for transportation of thermal energy from heat sources to consumers. On the balance sheet of the power supply organizations of the state enterprise “Belenergo”, which is part of the Ministry of Energy of the Republic of Belarus, there is more than 6500 km of heating grids in one-pipe terms. Analysis of the results of complex surveys of heat supply enterprises in Belarus shows that heating grids are one of the most unreliable elements of the heating system of the city today. The main reason of disturbances in operation of heating grids (about 90 %) is the local external corrosion that manifests itself in the form of fistulas and breaks of metal of network pipelines. The most quickly, all other things being equal, external corrosion affects those pipelines in which there is a direct contact of the unprotected surface of the pipe with the ground. In addition, in the process of operation of heating grids possible damages might happen that are associated with the breakdown of stationary pillars, with the gaps of the buildings cast iron valves, with the breakdown of the thread of the discharge valves, with damage of compensators, etc. According to ORGRES statistical studies, most of the damages (up to 70 %) of pipelines in Russia (as well as in Belarus) are associated with corrosion. Despite the estimated service life of the pipelines (up to 30 years), the sources of centralized heat supply in Russia pipes are 70 % worn out. With this regard, losses significantly increased in heating grids. General wear and tear of the heating grids of Ukraine in 2010 was 70 %, while losses in heating grids reached up to 30 %. Every year, the situation will only get worse. Thus, external corrosion of heating grids is one of the main factors determining reliability of operation of systems of heat supply.

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Causes of Heat Networks Damageability

Cited by 3 publications

References 3 publications

The use of energy saving technology as the basis for the state program implementation

The use of energy saving technology as the basis for the state program implementation

Causes of defects of the heating network

Assessment of the State and Analysis of Damageability of Heating Grids Pipelines

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