Results 11 to 20 of about 489,293 (298)

Centrifugal compressors of turboexpander units: development of approaches and experience of optimal design [PDF]

open access: yesОмский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2022
The process of designing a new turboexpander unit using the Universal modeling method consists of several stages: preliminary design, optimization, calculation of gas dynamic characteristics.
Yu. B. Galerkin   +7 more
doaj   +1 more source

A Joined Quasi-Steady-State Power Flow Calculation for Integrated Energy Systems

open access: yesIEEE Access, 2022
The network storage capability of district heating systems and gas systems can provide a considerable flexibility in integrated energy systems, increasing the use of volatile renewable energy generation.
Jonte Dancker, Martin Wolter
doaj   +1 more source

Dynamic reserve calculation method for gas-condensate reservoirs based on flowing material balance theory [PDF]

open access: yesYouqicang pingjia yu kaifa
The depletion process of a gas-condensate reservoir is characterized by significant condensation phenomenon. Existing material balance methods often fail to establish a linear relationship between pressure drop and cumulative production, resulting in ...
ZHAO Lingbo, DUAN Yonggang, LUO Le, ZHOU Jinxin
doaj   +3 more sources

Design of effective value calculation model for dynamic dataflow of infrared gas online monitoring

open access: yesPLoS ONE, 2021
The development of “CC30A CH4-CO2 combined analyzer” with infrared gas sensor as the core detection device can be widely used in online gas component analysis.
Dong Xiao   +5 more
doaj   +2 more sources

Dynamic risk calculation model applied to gas compressor

open access: yesREM: International Engineering Journal, 2019
The present article proposes to apply a Risk-Based Maintenance methodology in a gas compression system. This risk calculation is based on a semi-quantitative mathematical model that uses the interdependence of process variables and predictive maintenance
Frederico Carlos Maciel Thom   +3 more
doaj   +1 more source

Transport equations for a two-dimensional electron gas with spin-orbit interaction [PDF]

open access: yes, 2003
The transport equations for a two-dimensional electron gas with spin-orbit interaction are presented. The distribution function is a 2x2-matrix in the spin space.
Halperin, B. I., Mishchenko, E. G.
core   +2 more sources

Improvement Dependability of Offshore Horizontal-Axis Wind Turbines by Applying New Mathematical Methods for Calculation the Excess Speed in Case of Wind Gusts

open access: yesEnergies, 2021
The problem of increasing the reliability of wind turbines exists in the development of new offshore oil and natural gas fields. Reducing emergency situations is necessary due to the autonomous operation of drilling rigs and bulk seaports in the ...
Konstantin Osintsev   +2 more
doaj   +1 more source

Restricting the nonlinearity parameter in soil greenhouse gas flux calculation for more reliable flux estimates [PDF]

open access: yes, 2018
The static chamber approach is often used for greenhouse gas (GHG) flux measurements, whereby the flux is deduced from the increase of species concentration after closing the chamber.
Felber, Raphael   +5 more
core   +2 more sources

Improving Temporal Accuracy of Human Metabolic Chambers for Dynamic Metabolic Studies [PDF]

open access: yes, 2018
Metabolic chambers are powerful tools for assessing human energy expenditure, providing flexibility and comfort for the subjects in a near free-living environment.
Celi, Francesco S.   +5 more
core   +4 more sources

Research on a new method for calculating dynamic reserves of gas reservoirs considering inter-well interference [PDF]

open access: yesYouqicang pingjia yu kaifa
Dynamic reserve evaluation is a critical step for reservoir internal adjustment and potential development. For gas reservoirs with single-well production, the traditional material balance method is commonly used.
TENG Sainan, LI Yuansheng, WANG Jianwei, SHENG Zhichao, ZHANG Lili
doaj   +3 more sources

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