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Journal articles on the topic 'Compression of gas'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Sazonov, I. A., M. A. Mokhov, Kh A. Tumanyan, M. A. Frankov, and S. I. Markelov. "Development of an Automated Compressor Unit for Gas Compression at the Periodic Connection of an Ejector." Journal of Computational and Theoretical Nanoscience 16, no. 12 (2019): 5378–83. http://dx.doi.org/10.1166/jctn.2019.8586.

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The authors developed a new scientific approach for gas compression using ejector compressor units. A new patented technical solution opens up the prospect for the effective use of ejector compressor units when compressing various gases to pressures of 10…40 MPa. The goal of the research work is the development of automation systems using new scientific principles for gas compression. A new scientific approach is associated with the improvement of the ejector compressor unit, with the provision of conditions for the periodic connection of the ejector as part of the implementation of the cyclic

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Jeхenov M.K.,, Ismagilov F.R.,, Akhmetov S.M.,, Diarov M., та Bektay Y.K.,. "UTILIZATION OF HYDROGEN SULFIDE-CONTAINING REFINERY FLARE GASЕS". SERIES CHEMISTRY AND TECHNOLOGY 5, № 443 (2020): 64–70. http://dx.doi.org/10.32014/2020.2518-1491.81.

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Modern oil refinery flare does not provide the beneficial use of discharged hydrocarbon gases and vapors, which does not allow to reduce the volume of hydrocarbon gas burned in flare candles and reduce atmospheric pollution. To ensure a stable and trouble-free operation of the flare plant and to increase the efficiency of waste gas utilization, their preliminary compression using mechanical or jet compressors and the construction of gas treatment plants are required. A low-cost method of utilizing hydrogen sulfide-containing refinery gas is proposed, including two-stage gas compression by a li

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Chen, Shuangqing, Ze Yu, Yuchun Li, Zhihua Wang, and Minglin Si. "Optimization of a Typical Gas Injection Pressurization Process in Underground Gas Storage." Sustainability 16, no. 20 (2024): 8902. http://dx.doi.org/10.3390/su16208902.

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In the early construction of an underground gas storage facility in an oil and gas field in southwest China, the increasing gas injection volume led to a continuous rise in energy consumption, which affects the economic sustainability of gas injection and extraction. In order to improve efficiency and reduce energy consumption, optimization of the pressurization process was carried out. An optimization model for the process of pressurization in underground gas storage has been established. Based on the model, a joint optimization approach is applied, where MATLAB is responsible for the iterati

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4

Lelgemann, K. D. "The Design, Selection, and Application of Oil-Free Screw Compressors for Fuel Gas Service." Journal of Engineering for Gas Turbines and Power 117, no. 1 (1995): 74–80. http://dx.doi.org/10.1115/1.2812784.

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Fuel gas compressors installed in cogeneration systems must be highly reliable and efficient machines. The screw compressor can usually be designed to meet most of the gas flow rates and pressure conditions generally required for such installations. To an ever-increasing degree, alternative sources are being found for the fuel gas supply, such as coke-oven gas, blast-furnace gas, flare gas, landfill gas, and synthesis gas from coal gasification or from pyrolysis. A feature of the oil-free screw compressor when such gases are being considered is the isolation of the gas compression space from t

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5

Batayev, Nurlan. "Axial compressor fouling detection for gas turbine driven gas compression unit." Indonesian Journal of Electrical Engineering and Computer Science 15, no. 3 (2019): 1257. http://dx.doi.org/10.11591/ijeecs.v15.i3.pp1257-1263.

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<span>One of the main reasons of the performance degradation of gas turbines is the axial compressor fouling due to air pollutants. Considering the fact that the fouling leads to high consumption of fuel, reducing of the axial compressor’s discharge air pressure and increasing of the exhaust temperature, thus designing a compressor degradation detection system will allow prevent such issues. Many gas turbine plants lose power due to dirty axial compressor blades, which can add up to 4% loss of power. In case of power plants, the power loosing could be observed by less megawatts produced

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ASLANOV, Jamaladdin, and Tarlan FARAJOV. "FAILURES IN CENTRIFUGAL COMPRESSORS." Machine Science Journal 4, no. 2 (2024): 50–58. https://doi.org/10.61413/fcbe3989.

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Centrifugal flash gas compressors are mechanisms that convert the kinetic energy of gas into pressure energy, playing a crucial role in compressing and transporting associated gases in the oil and gas industry. These compressors operate on the principle of centrifugal force and are widely used in key industrial sectors. They are considered essential equipment for compressing and transporting gases in fields such as the oil and gas industry, chemical production, power generation, and cooling systems. Capable of handling high flow rates and large volumes, centrifugal compressors use impellers to

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7

Kalashnikov, Dmitriy, Yuriy Borisov, and Elizaveta Kalashnikova. "Natural gas intracyclic attachment for energy generating unit based on gas turbine plant." E3S Web of Conferences 114 (2019): 06004. http://dx.doi.org/10.1051/e3sconf/201911406004.

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In this article, problems of effectiveness increasing in complex power supply are considered. Disadvantages of centralized power engineering and advantages of power engineering capabilities organization in immediate consumer proximity are presented. Consumer needs satisfaction in electricity, heat supply and cold supply are offered to be realized by conversion of district and quarter boiler houses to trigeneration stations, which are based on gas turbine plants units. In this research, solutions of problem related to lack of fuel gas pressure for gas turbine engine power, which is included in

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8

Tretyakova, P. A., T. V. Germanova, and T. V. Tretyakova. "Improving energy efficiency at compressor stations using waste heat boilers at gas turbine plants." IOP Conference Series: Earth and Environmental Science 990, no. 1 (2022): 012052. http://dx.doi.org/10.1088/1755-1315/990/1/012052.

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Abstract Improving the energy efficiency of compressor stations is currently an urgent problem in the gas industry. Increasing the pressure of the transported gas by compression with the use of gas turbine units as a compressor drive is the most energy-intensive heat-and-power process. The article discusses modern methods of increasing the energy efficiency of compressor s tations with gas pumping units operating based on gas turbine plants by utilizing the heat of exhaust gases from gas turbine plants. A complex system is considered, which includes a gas pumping unit, a gas turbine unit, a wa

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9

Batayev, Nurlan, Batyrbek Suleimenov, and Sagira Batayeva. "Centrifugal compressor anti-surge control system modelling." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 2 (2022): 1419. http://dx.doi.org/10.11591/ijece.v12i2.pp1419-1428.

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<span>From the middle of XX century, natural gas is an important mineral, widely used in the energy sector. Transportation of natural gas is carried out via gas pipeline networks and compression stations. One of the key features which need to be implemented for any centrifugal gas compressor is a surge protection. This article describes the method and develops software application intended for simulation and study of surge protection system of a centrifugal compressor used in modern gas compression stations. Within the article research method, modelling environment’s block diagram, propo

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Nurlan, Batayev, Suleimenov Batyrbek, and Batayeva Sagira. "Centrifugal compressor anti-surge control system modelling." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 2 (2022): 1419–28. https://doi.org/10.11591/ijece.v12i2.pp1419-1428.

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From the middle of XX century, natural gas is an important mineral, widely used in the energy sector. Transportation of natural gas is carried out via gas pipeline networks and compression stations. One of the key features which need to be implemented for any centrifugal gas compressor is a surge protection. This article describes the method and develops software application intended for simulation and study of surge protection system of a centrifugal compressor used in modern gas compression stations. Within the article research method, modelling environment’s block diagram, proposed al

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11

Betelmal, E. H., and S. A. Farhat. "Energy and Exergy Analysis of a Simple Gas Turbine Cycle with Wet Compression." Mechanical Engineering Research 8, no. 1 (2018): 30. http://dx.doi.org/10.5539/mer.v8n1p30.

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A thermodynamic model of the wet compressor in a simple gas turbine cycle was investigated in this paper. A suitable quantity of water was injected into the compressor-stages where it evaporated. Subsequently, the steam and air were heated in the combustion chamber and expanded in the turbine. The wet compressor (WC) has become a reliable way to reduce gas emissions and increase gas turbine efficiency. In this study, the operational data of the simple gas turbine and the maximum amount of water that can be injected into the compressor were assessed, as well as a comparison between the dry comp

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Gao, Jian Qiang, Shao Dong Sun, Li Kun Wang, and Ning Wang. "The Analysis on the Scheme of the Flue Gas Compressor of a 300 MW Oxy-Fuel Pulverized Coal Fired Boiler." Applied Mechanics and Materials 602-605 (August 2014): 638–41. http://dx.doi.org/10.4028/www.scientific.net/amm.602-605.638.

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The compression of the flue gas is one of the most critical processes of CO2 recycling in oxy-fuel combustion technology. With a 300 MW Oxy-fuel pulverized coal fired boiler taken as an example of study, the selection of compressors of its flue gas compressing system is analyzed by the thermodynamic calculation. In this paper, two centrifugal compressors with the same specification are in parallel running as Scheme 1 of selection, while an axial compressor and a piston compressor are in series operation as Scheme 2 of selection. It shows that the Scheme 2 has the advantage of the energy consum

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Kryshtopa, S. I., L. I. Kryshtopa, M. М. Hnyp, I. M. Mykytiy, and M. M. Tseber. "Development of energy efficient system of gas cooling of mobile diesel compressor stations of oil and gas industry." Oil and Gas Power Engineering, no. 1(33) (September 3, 2020): 81–89. http://dx.doi.org/10.31471/1993-9868-2020-1(33)-81-89.

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The developments of domestic and foreign specialists in the field of improving the energy efficiency of mobile diesel compressor stations of the oil and gas industry is studied. The disadvantages of existing mobile diesel compressor stations in terms of their energy efficiency are identified. Theoretical studies of energy efficiency directions and designs of existing mobile diesel compressor stations have been carried out. It has been studied that for efficient operation of a compressor station it is rational to increase the load of compressors and organize the operation of equipment in energy

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Valiakhmetov, R. I., E. R. Bashirova, A. I. Galyautdinov, et al. "ROOT ANALYSIS OF LOSS STRUCTURAL INTEGRITY FOR OIL COOLING RADIATORS IN COMPRESSOR STATIONS PUMPING ASSOCIATED PETROLEUM GAS CONTAINING WET H2S." Problems of Gathering Treatment and Transportation of Oil and Oil Products, no. 5 (November 8, 2024): 54–66. http://dx.doi.org/10.17122/ntj-oil-2024-5-54-66.

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One of the main problems in the associated petroleum gas treatment is its further beneficial usage. Gases of the end stages of separation require special technical solutions when involving them in the production process due to low pressure. At the same time, gases of the first stages of separation by 70–90 % of the total amount are mainly used in gas processing plants. Gas of the end stages of separation contains components C3+ and higher from 400 to 2000 g/m3 and is a valuable petrochemical raw material. To transporting gas of the end stages of separation, compression is necessary to achieve

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15

Galashov, Nikolay N., Alexander A. Tubolev, Evgeny S. Boldushevsky, and Alexander A. Minor. "Impact of steam flow into a combustion chamber of a contact gas-steam installation on its energy characteristics." Bulletin of the Tomsk Polytechnic University Geo Assets Engineering 335, no. 2 (2024): 48–59. http://dx.doi.org/10.18799/24131830/2024/2/4436.

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Relevance. Reduction of natural gas consumption and emissions of harmful substances into the environment based on introduction of water vapor into a combustion chamber of a contact gas-steam installation. Aim. To carry out numerical studies on the influence of relative steam flow into the combustion chamber of the contact gas-steam installation on its energy characteristics. Objects. Contact gas-steam installations based on gas turbines with steam injection into the combustion chamber. Methods. Numerical methods based on material and energy balances of systems and elements of gas-steam install

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16

Presley, Terrance, Evilia Kurnia, and Basia Wronski. "Case study of the effects on coal seam gas well production with installation of well head compression (oil-flooded rotary screw type): early outcomes of an Australian trial of four wells in the Bowen Basin." APPEA Journal 57, no. 2 (2017): 629. http://dx.doi.org/10.1071/aj16199.

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This paper discusses the early outcomes of a trial of well head compression on coal seam gas (CSG) wells to lower surface pressure at the well head. This is a case study of four Johnson Controls Frick rotary screw compressor packages that were installed on CSG wells in an Origin Energy field in the Bowen basin and the early effects of lower well pressures on increased gas production due to the installation of compression. In mid-2016 Johnson Controls installed four compressor packages on Origin Energy wells with different characteristics (age, flow pressure), with a view of determining uplift

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17

Orlova, S., N. Mezeckis, and V. P. K. Vasudev. "Compression of Hydrogen Gas for Energy Storage: A Review." Latvian Journal of Physics and Technical Sciences 60, no. 2 (2023): 4–16. http://dx.doi.org/10.2478/lpts-2023-0007.

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Abstract Hydrogen has gained significant attention in recent years as a clean and sustainable energy source, with the potential to revolutionize the energy industry. However, one of the challenges associated with hydrogen as an energy source is its storage and transportation. Hydrogen is a highly compressible gas, making it difficult to store and transport in its natural state. The study presents different varieties of hydrogen tanks that are used for the storage and transportation of hydrogen gas. The methods for compressing hydrogen are described, with a focus on their advantages and disadva

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Kurz, R., and R. C. White. "Surge Avoidance in Gas Compression Systems." Journal of Turbomachinery 126, no. 4 (2004): 501–6. http://dx.doi.org/10.1115/1.1777577.

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The phenomenon of compressor surge and its prevention have drawn significant attention in the literature. An important aspect of surge avoidance lies in the design of the compressor station and, in particular, the piping upstream and downstream of the compressor. Most anti-surge systems are perfectly capable of avoiding surge during normal operating conditions. However, unplanned emergency shutdowns present a significant challenge, and surge avoidance in these cases depends to a large degree on the station layout. In this paper, data from a compressor that surged during an emergency shutdown a

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19

Millar, Dean L. "On the Determination of Efficiency of a Gas Compressor." Energies 17, no. 13 (2024): 3260. http://dx.doi.org/10.3390/en17133260.

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For a gas undergoing a compression process, it is more appropriate to think of either isentropic or polytropic efficiency as process-defining parameters indicating that a given end state of compression has been achieved, rather than a measure of effectiveness of conversion of one form of energy into another. The polytropic efficiency, as defined in ASME PTC-10 standard for compressor field trials and acceptance tests, actually involves the comparison of two distinct compression processes, neither of which are actually connected to the performance of the compressors producing them. Consequently

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Hakim, Muhammad L., Balza Achmad, and Juwari P. Sutikno. "Anti Surge Control of Centrifugal Compressor at PT. Pertamina EP Asset 2 Field Pendopo." E3S Web of Conferences 42 (2018): 01010. http://dx.doi.org/10.1051/e3sconf/20184201010.

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Gas Compression Package (GCP) is a vital system in the distribution of gas. Pertamina EP, in this regard as a state-owned company managing oil and gas on the upstream, is in the project phase of purchasing and installing compressor facilities. GCPs are used to increase gas pressure hence it can be transferred from gas wells to industrial areas. Dynamic analysis becomes important to observe the performance of the compressor and to ensure safety during operation, in order to avoid surge phenomenon. Surge is an undesirable phenomenon in the form of a backward flow of gas. The surge may damage the

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Hu, Zhongjun, Jingyu Li, Bingming Wang, and Liqiang Liu. "Application, development and future of helium compressor in large-scale cryogenic engineering." IOP Conference Series: Materials Science and Engineering 1327, no. 1 (2025): 012025. https://doi.org/10.1088/1757-899x/1327/1/012025.

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Abstract The efficiency of large-scale cryogenic equipment is very important. Efficient helium compression on more large scale will be one of the major challenges in the future. Helium compressors have experienced the evolution process of pistons and screws in helium liquefaction technology. Oil-injection screw compressor skillfully uses the sealing effect and atomization cooling effect of oil film to solve the technical problems caused by easy leakage of small molecular weight gas and high compression heat of helium gas respectively. In order to improve the compression efficiency of helium ga

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Zhernokletov, M. V., S. F. Manachkin, N. B. Davydov, et al. "Kvaziizentropicheskoe szhatie gazoobraznykh geliya i deyteriya v sfericheskikh konstruktsiyakh pri terapaskal'nykh davleniyakh." Журнал экспериментальной и теоретической физики 163, no. 2 (2023): 260–73. http://dx.doi.org/10.31857/s0044451023020116.

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The results of four experiments on studying preliminarily statically compressed gaseous helium and deuterium during their subsequent compression in explosive spherical cascade structures providing quasi-isentropic gas compression are presented. For helium, the following parameters were achieved: in one experiment, the compression pressure is Pmean ≈ 4.9 TPa at a density ρmax ≈ 6.4 g/cm3 and the compression ratio is δ = ρ/ρ0 ≈ 320; in another experiment, Pmean ≈ 10.9 TPa, ρmax ≈ 10.3 g/cm3, and δ ≈ 470. For deuterium, these parameters are Pmean ≈ 3.4 TPa, ρmax ≈ 6.0 g/cm3, and δ ≈ 162 in one ex

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Kim, Kyoung Hoon, and Chul Ho Han. "Performance Analysis of Wet Compression Process under Critical Conditions of Water Injection." Applied Mechanics and Materials 229-231 (November 2012): 2541–45. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.2541.

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In wet compression process water is injected at an inlet of compressor and continuous cooling occurs due to evaporation of water droplets during the compression process of air, which can save the compression work and enhance the performance of gas turbine system. In this work, performance analysis of the wet compression process is carried out under the critical conditions of water injection which are defined as the maximum water injection which can be evaporated completely inside the compressor. For various ambient conditions the important variables of wet compression process such as water inj

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Oleksandr, Titlov, Vasyliv Oleg, Sahala Tetiana, and Bilenko Nataliia. "EVALUATION OF THE PROSPECTS FOR PRELIMINARY COOLING OF NATURAL GAS ON MAIN PIPELINES BEFORE COMPRESSION THROUGH THE DISCHARGE OF EXHAUST HEAT OF GAS-TURBINE UNITS." EUREKA: Physics and Engineering 5 (September 30, 2019): 47–55. https://doi.org/10.21303/2461-4262.2019.00978.

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For the transportation of natural gas through pipelines, gas pumping units (GPU) are installed at numerous compressor stations (CS), the energy carrier for which, in most cases, is transported natural gas. 0.5 ... 1.5 % of the volume of transported gas is consumed (burned) by the pumping unit drive. The situation with the replacement of existing equipment with modern equipment is associated with significant investments, on the one hand, and the uncertainty with the transit of Russian natural gas through gas transmission systems of Ukraine in the near future. More promising is the way to increa

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Titlov, Oleksandr, Oleg Vasyliv, Tetiana Sahala, and Nataliia Bilenko. "EVALUATION OF THE PROSPECTS FOR PRELIMINARY COOLING OF NATURAL GAS ON MAIN PIPELINES BEFORE COMPRESSION THROUGH THE DISCHARGE OF EXHAUST HEAT OF GAS-TURBINE UNITS." EUREKA: Physics and Engineering 5 (September 17, 2019): 47–55. http://dx.doi.org/10.21303/2461-4262.2019.00978.

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For the transportation of natural gas through pipelines, gas pumping units (GPU) are installed at numerous compressor stations (CS), the energy carrier for which, in most cases, is transported natural gas. 0.5 ... 1.5 % of the volume of transported gas is consumed (burned) by the pumping unit drive. The situation with the replacement of existing equipment with modern equipment is associated with significant investments, on the one hand, and the uncertainty with the transit of Russian natural gas through gas transmission systems of Ukraine in the near future. More promising is the way to increa

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Lugo-Méndez, Helen, Teresa Lopez-Arenas, Alejandro Torres-Aldaco, Edgar Vicente Torres-González, Mauricio Sales-Cruz, and Raúl Lugo-Leyte. "Interstage Pressures of a Multistage Compressor with Intercooling." Entropy 23, no. 3 (2021): 351. http://dx.doi.org/10.3390/e23030351.

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This paper considers the criterion of minimum compression work to derive an expression for the interstage pressure of a multistage compressor with intercooling that includes the gas properties, pressure drops in the intercoolers, different suction gas temperatures, and isentropic efficiencies in each compression stage. The analytical expression for the interstage pressures is applied to estimate the number of compression stages and to evaluate its applicability in order to estimate interstage pressures in the operation of multistage compressors, which can be especially useful when their measur

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Van de Ven, James D., and Perry Y. Li. "Liquid piston gas compression." Applied Energy 86, no. 10 (2009): 2183–91. http://dx.doi.org/10.1016/j.apenergy.2008.12.001.

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Ahn, Barah, Macey Schmetzer, and Paul I. Ro. "Comparative Study of Solid-Based and Liquid-Based Heat Transfer Enhancement Techniques in Liquid Piston Gas Compression." Energies 18, no. 8 (2025): 2032. https://doi.org/10.3390/en18082032.

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The combination of a liquid piston gas compressor and a solid metal insert can achieve a near-isothermal compression process, which can greatly contribute to improving the system efficiency of a compressed-air energy storage system. To examine the effectiveness of the insert at various pressure levels, compressions were performed in a liquid piston compressor with and without copper wire mesh inserts at three different pressures of 1, 2, and 3 bars. The use of inserts increased isothermal compression efficiencies by 8–10% from the baseline isothermal efficiencies about 83–87%, while the compro

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Kopelowicz, H. J., A. R. Barreto, F. L. C. Moutella, H. T. Arêas, J. A. R. Parise, and C. E. R. Siqueira. "SIMULATION AND EXPERIMENTAL EVALUATION OF AN INNOVATIVE ROTARY COMPRESSOR WITH VARIABLE SPEED DISPLACERS." Revista de Engenharia Térmica 7, no. 2 (2008): 51. http://dx.doi.org/10.5380/reterm.v7i2.61778.

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This paper describes preliminary studies of a new rotary compressor with variable speed displacers. Two displacers rotate concentrically, in an annular space, at variable and phased angular velocities, thus creating two variable-volume compression spaces between them. The displacers are individually driven by two concentric shafts. An innovative driving mechanism imposes phased variable angular speeds to the shafts and, consequently, to the displacers, thus providing a volume variation in the gas compression spaces. The driving mechanism also offers a convenient way of capacity control, from z

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Wu, T. T., and W. H. Hsieh. "Compression Processes and Performance Analysis of a High-Pressure Reciprocating Gas Compressor." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 210, no. 2 (1996): 153–65. http://dx.doi.org/10.1243/pime_proc_1996_210_182_02.

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Compression processes and compressor performance in a two-stage 41.34 MPa (6000 lb/in2) reciprocating gas compressor were investigated by transient multi-dimensional and transient global thermodynamic models. The transient multi-dimensional model was adopted to predict the two-dimensional compression processes in the second-stage cylinder of the high-pressure reciprocating gas compressor. Calculated results showed no significant temperature gradients anywhere in the compressor cylinder except near the wall, throughout one complete compressor cycle. On the other hand, the calculated velocity fi

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Farukhshina, R. R., S. V. Kitayev, and N. M. Darsaliya. "Improving the Energy Efficiency of a Gas Compression System at a Compressor Station." IOP Conference Series: Earth and Environmental Science 988, no. 3 (2022): 032051. http://dx.doi.org/10.1088/1755-1315/988/3/032051.

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Abstract For natural gas pumping via main gas line gas compressor units are used. During the gas compressor units’ operation, there are natural gas consumption as a fuel and for technological needs. To prevent the escape of gas from the internal cavity of the centrifugal compressor N-370-18-1 into machine room, the design considers a hydraulic seal “oil-gas”. The feature of centrifugal compressor with hydraulic seal “oil-gas” is the discharge of gas from the degassing chamber through a candle into the atmosphere. Rational use of wasted gas make it possible to gain a benefit by saving raw and r

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Sciacovelli, L., P. Cinnella, C. Content, and F. Grasso. "Dense gas effects in inviscid homogeneous isotropic turbulence." Journal of Fluid Mechanics 800 (June 30, 2016): 140–79. http://dx.doi.org/10.1017/jfm.2016.393.

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A detailed numerical study of the influence of dense gas effects on the large-scale dynamics of decaying homogeneous isotropic turbulence is carried out by using the van der Waals gas model. More specifically, we focus on dense gases of the Bethe–Zel’dovich–Thompson type, which may exhibit non-classical nonlinearities in the transonic and supersonic flow regimes, under suitable thermodynamic conditions. The simulations are based on the inviscid conservation equations, solved by means of a ninth-order numerical scheme. The simulations rely on the numerical viscosity of the scheme to dissipate e

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Sun, Yuyao, Jinfeng Wang, and Jing Xie. "Performance Optimizations of the Transcritical CO2 Two-Stage Compression Refrigeration System and Influences of the Auxiliary Gas Cooler." Energies 14, no. 17 (2021): 5578. http://dx.doi.org/10.3390/en14175578.

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To optimize the performance of the transcritical CO2 two-stage compression refrigeration system, the energy analysis and the exergy analysis are conducted. It is found that higher COP, lower compression power, and less exergy destruction can be achieved when the auxiliary gas cooler is applied. Moreover, the discharge temperature of the compound compressor (HPS) can be reduced by decreasing the temperature at the outlet of the auxiliary gas cooler (Tagc,out). When the Tagc,out is reduced from 30 to 12 °C, the discharge temperature of the compound compressor (HPS) can be decreased by 13.83 °C.

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Баутин, Сергей Петрович, and Юрий Владимирович Николаев. "Numerical solution of the gas compression problem at a specified law of action." Вычислительные технологии, no. 6 (December 16, 2021): 20–32. http://dx.doi.org/10.25743/ict.2021.26.6.003.

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Выполнено численное моделирование одномерных течений политропного газа, описывающее сжатие покоящегося газа с плотностью 1 в покоящийся газ, сжатый до значения 10. Описываемое сжатие происходит без ударных волн эффективным с точки зрения энерговложения способом, так как энергия тратится только на сжатие газа, но не на его разгон Controlled thermonuclear fusion (CTF) is an almost unlimited source of energy and scientists have been studying it for several decades. This requires an efficient and stable compression of diyterium-tritium fuel to a very high density. This work addresses shockless one

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Elmegreen, Bruce, Binquan Luan, Rodrigo Neumann Barros Ferreira, and Breanndan O’Conchuir. "A method for near-perfect gas separation in two interconnected streams." Journal of Applied Physics 133, no. 1 (2023): 015001. http://dx.doi.org/10.1063/5.0127983.

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Gas separation such as CO[Formula: see text] from N[Formula: see text] in flue gas is an important step in reducing greenhouse gas emission. We discuss a separation method that moves mixed gas between two tracks at different pressures with ever-increasing purity at each stage along the tracks. Designs for adsorbents driven by volumetric pumps and membranes driven by a pressure drop are illustrated. For selectivity exceeding 10 in a three-stage system, the purity of the CO[Formula: see text] output is 97.8% with 99.75% recovered. For a six-stage example, the purity of CO[Formula: see text] is 9

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Kim, Kyoung Hoon, Kyoung Jin Kim, and Hyung Jong Ko. "Effects of Wet Compression on Performance of Regenerative Gas Turbine Cycle with Turbine Blade Cooling." Applied Mechanics and Materials 224 (November 2012): 256–59. http://dx.doi.org/10.4028/www.scientific.net/amm.224.256.

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When water is injected at an inlet of compressor, wet compression occurs due to evaporation of water droplets. In this work, the effects of wet compression on the performance of regenerative gas turbine cycle with turbine blade cooling are analytically investigated. For various pressure ratios and water injection ratios, the important system variables such as ratio of coolant flow for turbine blade cooling, fuel consumption, specific power and thermal efficiency are estimated. Parametric studies show that wet compression leads to significant enhancement in both specific power and thermal effic

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37

Yan, Wenfei, and Stephen B. Hall. "Rapid compressions in a captive bubble apparatus are isothermal." Journal of Applied Physiology 95, no. 5 (2003): 1896–900. http://dx.doi.org/10.1152/japplphysiol.00591.2003.

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Captive bubbles are commonly used to determine how interfacial films of pulmonary surfactant respond to changes in surface area, achieved by varying hydrostatic pressure. Although assumed to be isothermal, the gas phase temperature (Tg) would increase by >100°C during compression from 1 to 3 atm if the process were adiabatic. To determine the actual change in temperature, we monitored pressure (P) and volume (V) during compressions lasting <1 s for bubbles with and without interfacial films and used P · V to evaluate Tg. P · V fell during and after the rapid compressions, consistent with

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Kim, Kyoung Hoon, Dong Joo Kim, Kyoung Jin Kim, and Seong Wook Hong. "An Assessment of Wet Compression Process in Gas Turbine Systems with an Analytical Modeling." Applied Mechanics and Materials 234 (November 2012): 23–27. http://dx.doi.org/10.4028/www.scientific.net/amm.234.23.

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Recently humidified gas turbine systems in which water or steam is injected have attracted much attention, since they can offer a high efficiency and a high specific power with a relatively low cost compared to combined-cycle gas turbine systems, and therefore they have a potential for future power generation. In this study, performance analysis of the wet compression process is carried out with an analytical modeling which was developed from heat and mass transfer, and thermodynamic analyses based on droplet evaporation. Wet compression variables such as temperature-averaged polytropic coeffi

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Guo, Yi, Qi Wang, Maofei Geng, Xueyuan Peng, and Jianmei Feng. "Effects of Liquid Density on the Gas-Liquid Interaction of the Ionic Liquid Compressor for Hydrogen Storage." Energies 16, no. 7 (2023): 3193. http://dx.doi.org/10.3390/en16073193.

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As a new and promising compression technology for hydrogen gas, the ionic liquid compressor inherits the advantages of the ionic liquid and the hydraulic system. The liquid density is one of the key parameters influencing the fluid flow field, the sloshing of the bulk liquid, and the movement of droplets generated during the compressor operation. An appropriate selection of the liquid density is important for the compressor design, which would improve the thermodynamic performance of the compressor. However, the density of the ionic liquid varied significantly depending on the specific combina

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E. H. Betelmal, A. M. Naas, and A. Mjani. "Energy and exergy analysis of a simple gas turbine combined with linde cycle and N2 injected into the compressor of the gas turbine." GSC Advanced Engineering and Technology 1, no. 1 (2021): 006–15. http://dx.doi.org/10.30574/gscaet.2021.1.1.0001.

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In this paper, we investigated a thermodynamic model of the regeneration gas turbine cycle with nitrogen supplied during the compression process. A suitable quantity of nitrogen that comes from the air separation cycle (Linde cycle) is injected between the stages of the compressor where it is evaporated, then the nitrogen and air mixture enters into the combustion chamber where it is burned and expanded in the turbine. We used this method to reduce greenhouse gases and improve gas turbine efficiency. In this work, we evaluated the operational data of the regeneration gas turbine cycle and the

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Zheng, Qun, Yufeng Sun, Shuying Li, and Yunhui Wang. "Thermodynamic Analyses of Wet Compression Process in the Compressor of Gas Turbine." Journal of Turbomachinery 125, no. 3 (2003): 489–96. http://dx.doi.org/10.1115/1.1575254.

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Thermodynamic model of wet compression process is established in this paper. The topics of ideal wet compression process, actual wet compression process, water droplet evaporative rate, wet compression work, inlet evaporative cooling, concept of wet compression efficiency, aerodynamic breaking of water droplets etc. are investigated and discussed in this paper.

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42

Fedorova, M. A. "Y. S. Hu, H. J. Wei, B. Yu, O. X. Yang, J. Wang, J. Wu. Research on the vapor injection of two-stage rotary compressor / trans. from Engl. M. A. Fedorova." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 5, no. 4 (2021): 65–74. http://dx.doi.org/10.25206/2588-0373-2021-5-4-65-74.

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In order to understand the vapor injection flow characteristics of two-stage rotary compressor in the course of compression, a mathematical model based on mass conservation equation, energy equation and thermodynamic identity was established and proved by P-V diagram testing results. Some useful conclusions about pressure in the intermediate chamber and mass flow of vapor injection in the course of compression were also given out. The results show that, gas backflow between the intermediate chamber and the vapor injection channel is an important defection of two-stage rotary compressor which c

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Rigatos, G., M. Abbaszadeh, B. Sari, and P. Siano. "Nonlinear Optimal Control for a Gas Compressor Actuated by a Five-Phase Induction Motor." Power Electronics and Drives 8, no. 1 (2023): 196–218. http://dx.doi.org/10.2478/pead-2023-0014.

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Abstract The article proposes a nonlinear optimal control method for the dynamic model of a gas centrifugal compressor being actuated by a five-phase induction motor (5-phase IM). To achieve high torque and high power in the functioning of gas compressors, 5-phase IM appear to be advantageous in comparison to three-phase synchronous or asynchronous electric machines. The dynamic model of the integrated compression system, which comprises the gas compressor and the 5-phase IM, is first written in a nonlinear and multivariable state-space form. It is proven that the electrically driven gas-compr

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Rahman, M. M., Thamir K. Ibrahim, K. Kadirgama, R. Mamat, and Rosli A. Bakar. "Influence of Operation Conditions and Ambient Temperature on Performance of Gas Turbine Power Plant." Advanced Materials Research 189-193 (February 2011): 3007–13. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.3007.

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This paper presents the effect of ambient temperature and operation conditions (compression ratio, turbine inlet temperature, air to fuel ratio and efficiency of compressor and turbine) on the performance of gas turbine power plant. The computational model was developed utilizing the MATLAB codes. Turbine work found to be decreases as ambient temperature increases as well as the thermal efficiency decreases. It can be seen that the thermal efficiency increases linearly with increases of compression ratio while decreases of ambient temperature. The specific fuel consumption increases with incre

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Yang, Lianzhi, Tong Niu, Fanmin He, and Zhiyong Song. "Study on the Compressive and Tensile Properties of Gneiss Outcrop of Bozhong 196 Gas Field in China." Energies 16, no. 9 (2023): 3919. http://dx.doi.org/10.3390/en16093919.

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In this paper, based on the gneiss outcrop of Bozhong 196 gas field in China, uniaxial compression and Brazil splitting tests were conducted by using cores of different orientations. The following compression properties were studied: the elastic compression modulus, Poisson’s ratio and compressive strength of the gneiss outcrop. The following tensile properties were studied: the tensile modulus, the tensile strength and peak energy rate of gneiss outcrop. The results demonstrate the following: (1) The elastic compression modulus, compressive strength, tensile strength and peak energy rate of g

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Appel, Sabrina M., Blakesley Burkhart, Vadim A. Semenov, Christoph Federrath, Anna L. Rosen, and Jonathan C. Tan. "What Sets the Star Formation Rate of Molecular Clouds? The Density Distribution as a Fingerprint of Compression and Expansion Rates." Astrophysical Journal 954, no. 1 (2023): 93. http://dx.doi.org/10.3847/1538-4357/ace897.

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Abstract We use a suite of 3D simulations of star-forming molecular clouds, with and without stellar feedback, magnetic fields, and driven turbulence, to study the compression and expansion rates of the gas as functions of density. We show that, around the mean density, supersonic turbulence promotes rough equilibrium between the amounts of compressing and expanding gas, consistent with continuous gas cycling between high- and low-density states. We find that the inclusion of protostellar jets produces rapidly expanding and compressing low-density gas. We find that the gas mass flux peaks at t

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Franco, Alessandro, and Caterina Giovannini. "Hydrogen Gas Compression for Efficient Storage: Balancing Energy and Increasing Density." Hydrogen 5, no. 2 (2024): 293–311. http://dx.doi.org/10.3390/hydrogen5020017.

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This article analyzes the processes of compressing hydrogen in the gaseous state, an aspect considered important due to its contribution to the greater diffusion of hydrogen in both the civil and industrial sectors. This article begins by providing a concise overview and comparison of diverse hydrogen-storage methodologies, laying the groundwork with an in-depth analysis of hydrogen’s thermophysical properties. It scrutinizes plausible configurations for hydrogen compression, aiming to strike a delicate balance between energy consumption, derived from the fuel itself, and the requisite number

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Huang, P. X., S. Yonkers, and J. Willie. "A Novel Screw Compressor with a Shunt Enhanced Compression and Pulsation Trap (SECAPT)." IOP Conference Series: Materials Science and Engineering 1267, no. 1 (2022): 012019. http://dx.doi.org/10.1088/1757-899x/1267/1/012019.

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Some positive displacement (PD) compressors are equipped with automatic discharge valves such as reed valves that open automatically whenever the cavity pressure is slightly larger than the outlet pressure to deal effectively with varying pressure ratio applications. Screw compressors today do not have such valves, resulting in off-design conditions known as the under-compression or over-compression when the cavity pressure at discharge is deviating from the outlet pressure. Compressor efficiency suffers and pulsation/noise becomes worse under these conditions. Some type of controls are desire

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Brezean, Octavian Andrei. "Increase efficiency and process optimization for an existing gas compressor station unit in Oil and Gas industry." IOP Conference Series: Earth and Environmental Science 968, no. 1 (2022): 012001. http://dx.doi.org/10.1088/1755-1315/968/1/012001.

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Abstract As most gas compression facilities in Romania are from the 60’s-80, there is an increased demand to increase their efficiency. The paper explains researches on energy, economic and functional efficiency of equipment and processes during the modernization of a compressor station in oil and gas industry. It is meant to serve as a general guide for methods and procedures usually used in the industry in Romania, to improve the efficiency of an existing compressor station.

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Peng, X., Z. Xing, L. Li, and P. Shu. "Thermodynamic analysis of the rotary tooth compressor." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 216, no. 4 (2002): 321–27. http://dx.doi.org/10.1243/09576500260251165.

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The Roots blower has no built-in compression and therefore is not efficient when it discharges gases at pressures substantially higher than at suction. The rotary tooth compressor, which includes built-in compression, has been proposed as a more efficient alternative. This paper describes an analytical study of the rotary tooth compressor. A mathematical model has been constructed to simulate the thermodynamic processes within it and hence predict its performance. The model allows for gas leakage as well as the main gas flow into and out of the working chamber. The estimated performance has be

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