Theoretical study and design of a low-grade heat-driven pilot ejector refrigeration machine operating with butane and isobutane and intended for cooling of gas transported in a gas-main pipeline

Any gas-main pipeline presents a technological complex of objects that functions as a single system, where all objects of the gas-main pipeline are classified as hazardous facilities, for which most of the existing risks are typical. In order to maintain a gas-transport system in operational, standard and safe condition, it is necessary to perform repair (routine) work assuming replacement or repair of defective sections of the pipe (or other equipment). The methods which an operator of a gas-transport system uses today for ensuring safety of such repair (routine) work are either environmentally harmful (“bleed” of gas), or hazardous and inefficient by energy and/or resource (“bleed” of gas, gas utilization, increasing of pipeline bearing capacity, "overlaying-welding" of defects under pressure, etc.). With this scheme of technological process, level of working and environmental safety and energy-resource efficiency of gas-transport enterprises sharply decreases. The purpose of our research was to propose a risk-oriented approach to the problem of working safety and energy resource efficiency of the gas-transport enterprises. The only type of repair, with which operational (safe) state and resource of the pipeline system can be fully restored is replacement of defective pipe or its section. Therefore, at the stage of preparatory work, the most acute problem is discharge of natural gas from the local section of pipelines by means of its pumping-over (accumulation) instead of "bleeding" or "utilization". We propose a rational, effective and risk-oriented approach to the use of mobile compressor units for pumping over (evacuating) of natural gas as a method for improving working safety and energy efficiency of the gas-transport enterprises. The proposed approach allows the gas-transport companies to create quickly an automated risk management system and reduce the risk level and, as a result, to improve working safety and energy efficiency of the processes of gas transportation.

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Morphology analysis of production defect of gas-main pipeline metal

Roolled Products Manufacturing ◽

10.31044/1684-257x-2019-0-9-33-38 ◽

2019 ◽

pp. 33-38

Author(s):

Dmitriy Zhukov ◽

◽

Sergey Konovalov ◽

Aleksey Afanasyev ◽

Maksim Vaskov

Keyword(s):

Main Pipeline ◽

Gas Main ◽

Morphology Analysis ◽

Gas Main Pipeline

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EFFICIENCY ASSESSMENT OF GAS MAIN PIPELINE GEOTECHNICAL MONITORING BY QUALITY OF PRODUCED DATA

Oil and Gas Studies ◽

10.31660/0445-0108-2015-3-81-86 ◽

2015 ◽

pp. 81-86

Author(s):

Z. Sh. Aleskerova ◽

S. A. Pulnikov ◽

Yu. S. Sysoev ◽

N. V. Kazakova

Keyword(s):

Dynamic Assessment ◽

Main Pipeline ◽

Technical Problems ◽

Object Condition ◽

Geotechnical Monitoring ◽

Efficiency Assessment ◽

Gas Main ◽

Gas Main Pipeline ◽

Efficiency Increase

Geotechnical monitoring results analysis of gas main pipeline’s lineal part accomplished based on JSC «Gaz-prom» data of 2011-2013 yr. Line damages classification and its evolution dynamic assessment are made taking into account reconstruction operations of sections with non-normative condition. Definition is made about geotechnical monitoring main deficiency, which is lowering the quality of produced data about object condition. It is offering to solve the row of science-technical problems for efficiency increase of geotechnical monitoring results proceeding methodic.

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The corrosion damage mechanisms of the gas pipelines in the Republic of Sakha (Yakutia)

E3S Web of Conferences ◽

10.1051/e3sconf/201912103002 ◽

2019 ◽

Vol 121 ◽

pp. 03002

Author(s):

Alexander Ivanov ◽

Konstantin Bolshev ◽

Alexander Bolshakov ◽

Aytalina Syromyatnikova ◽

Anisiy Alexeev ◽

...

Keyword(s):

Corrosion Damage ◽

Main Pipeline ◽

Working Capacity ◽

Term Operation ◽

Long Period ◽

Gas Main ◽

Gas Main Pipeline ◽

The Republic ◽

Near Future

The article provides examples of critical damage to a long-running gas pipeline on the territory of the Republic of Sakha (Yakutia), which arose as a result of the development of corrosion processes, discusses the mechanisms and scenarios for the development of corrosion damage in the cryolithozone conditions. Considering the processes and mechanisms, they continue for a long period of time., an increase in the number of damages to a gas main pipeline due to corrosive degradation is expected in the near future. The stage of diffuse damage during long-term operation is confirmed by the increasing loss of working capacity due to corrosion damage in the last 25 years of the pipeline operation.

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Thermal Management Technologies Development for the Gas Transport on the Gas-main Pipeline

Procedia Engineering ◽

10.1016/j.proeng.2015.07.327 ◽

2015 ◽

Vol 113 ◽

pp. 237-243 ◽

Cited By ~ 3

Author(s):

I.A. Yanvarev ◽

A.D. Vanyashov ◽

A.V. Krupnikov

Keyword(s):

Thermal Management ◽

Gas Transport ◽

Main Pipeline ◽

Gas Main ◽

Gas Main Pipeline

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Methodology for Assessing the Risks of Emergencies on the East Siberia - Pacific Ocean Oil and Gas Main Pipeline

International Journal of Mechanical and Production Engineering Research and Development ◽

10.24247/ijmperdfeb20202 ◽

2020 ◽

Vol 10 (1) ◽

pp. 13-20

Author(s):

Kovshov S. V et al., Kovshov S. V et al., ◽

Keyword(s):

Pacific Ocean ◽

Oil And Gas ◽

Main Pipeline ◽

East Siberia ◽

Gas Main ◽

Gas Main Pipeline

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Hybrid single-stage triple pressure level absorption/compression cycle operated by low grade heat sources

Renewable Energy and Power Quality Journal ◽

10.24084/repqj09.257 ◽

2011 ◽

pp. 119-123

Author(s):

M. Jelinek ◽

A. Levy ◽

I. Borde

Keyword(s):

Pressure Level ◽

Single Stage ◽

Low Grade ◽

Heat Sources ◽

Compression Cycle ◽

Low Grade Heat

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Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

10.26434/chemrxiv.9730694.v1 ◽

2019 ◽

Author(s):

Zhao-Yang Zhang ◽

Tao LI

Keyword(s):

Energy Density ◽

Solar Energy ◽

High Performance ◽

High Energy ◽

Solar Thermal ◽

High Energy Density ◽

Low Grade ◽

Thermal Battery ◽

Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

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