Log in

Relevant bibliographies by topics / Gas Expanders / Journal articles

To see the other types of publications on this topic, follow the link: Gas Expanders.

Journal articles on the topic 'Gas Expanders'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Gas Expanders.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Hossain, Md Shazzad, Ibrahim Sultan, Truong Phung, and Apurv Kumar. "A Literature Review of the Design, Modeling, Optimization, and Control of Electro-Mechanical Inlet Valves for Gas Expanders." Energies 17, no. 18 (2024): 4569. http://dx.doi.org/10.3390/en17184569.

Full text

Abstract:

The ever-growing concerns about global warming and the rapid depletion of fossil fuels have triggered a rising interest in the research for cleaner, more efficient, and cost-effective energy generation. Organic Rankine cycle systems have immense potential to become a strong alternative to conventional methods of energy generation. However, such systems’ efficiency is limited by the performance of the incorporated gas expanders or prime movers. Conventional gas expanders often utilize ports or cam-operated valves. Ported expanders offer limited efficiency and controllability and produce high em

APA, Harvard, Vancouver, ISO, and other styles

2

Wei, Junying, Gang Li, Guangxian Yin, et al. "Analysis of Flow Characteristics at the Inlet of a Circular Involute Variable Wall Thickness Scroll Expander." Processes 11, no. 11 (2023): 3117. http://dx.doi.org/10.3390/pr11113117.

Full text

Abstract:

This paper mainly studies the effects of the inlet shape on the internal flow field and the output characteristics of a scroll expander. Based on circular involute variable wall thickness scroll profiles, three inlet working cavities are numerically simulated using the CFD method and dynamic mesh technique, thus obtaining the internal flow field, the inlet flow rate, the transient gas force, and the change rule of inlet power loss in the working cavity. The results show that the pressure distribution in the working cavity of the scroll expanders with elliptical and double circular groove inlet

APA, Harvard, Vancouver, ISO, and other styles

3

Lin, Shuai. "A CFD-based study of twin-screw expander performance and inlet structure optimization." Journal of Physics: Conference Series 2441, no. 1 (2023): 012069. http://dx.doi.org/10.1088/1742-6596/2441/1/012069.

Full text

Abstract:

Abstract Twin-screw expanders are widely used for small to medium-sized organic Rankine cycle (ORC) power generation. In order to improve the performance of twin-screw expanders in ORC, this study aims to improve the inlet efficiency and reduce the inlet pressure loss by changing the geometry of the inlet and shell. The CFD transient simulation is used to study the pressure, gas flow conditions and other parameters in the working chamber that are not easily obtained through experiments. The effects of improved size, speed, pressure ratio and internal volume ratio on the performance of the expa

APA, Harvard, Vancouver, ISO, and other styles

4

Belousov, Artem Evgenevich, and Egor Sergeevich Ovchinnikov. "Mathematical Modeling of the Operation of an Expander-Generator Pressure Regulator in Non-Stationary Conditions of Small Gas Pressure Reduction Stations." Mathematics 10, no. 3 (2022): 393. http://dx.doi.org/10.3390/math10030393.

Full text

Abstract:

Long-distance gas transfer requires high pressure, which has to be reduced before the gas is conveyed to the customers. This pressure reduction takes place at natural gas pressure reduction stations, where gas pressure is decreased by using gas flow energy for overcoming local resistance, represented by a throttling valve. This pressure energy can be reused, but it is difficult to implement it at small pressure reduction stations, as the values of unsteadiness significantly increase when the gas approaches consumers, whereas gas flow rate and pressure decrease. This work suggests replacing thr

APA, Harvard, Vancouver, ISO, and other styles

5

Kitt, S. R., and B. D. Rose. "Foothills Decompression/Recompression Facilities—Unique Power Recovery Application in Gas Pipelines." Journal of Engineering for Gas Turbines and Power 116, no. 1 (1994): 143–51. http://dx.doi.org/10.1115/1.2906783.

Full text

Abstract:

Foothills Pipe Lines Ltd. is the Canadian sponsor of the Alaska Natural Gas Transportation System (ANGTS), a pipeline project selected in Canada and the United States as the means for transporting Alaskan gas reserves to the lower 48 United States. Currently, certain Prebuild portions of the ANGTS are in operation delivering Canadian gas to U. S. markets. A recent system expansion of the Eastern Leg Prebuild to accommodate increased Canadian gas exports entailed the construction of Decompression/Recompression facilities at Empress, Alberta to enable high-pressure operation of the Foothills pip

APA, Harvard, Vancouver, ISO, and other styles

6

Fermoselli, N. E. G. "PREDICTING THE IMPACT OF A FCC TURBO EXPANDER ON PETROLEUM REFINERIES." Revista de Engenharia Térmica 9, no. 1-2 (2010): 40. http://dx.doi.org/10.5380/reterm.v9i1-2.61929.

Full text

Abstract:

Implementing a turbo expander connected to a fluid catalytic cracking (FCC) unit in order to produce power from flue gas has already become a common practice in oil refineries worldwide. Despite of recovering energy which used to be wasted in an orifice chamber, the implementation of expander and its skids still requires high investment, which often begins with a third-stage cyclones installation to enhance flue gas cleanness. Moreover, machine and also pipes need to be made with special materials in order to resist high temperatures and erosion. Hence, there are some items to be checked befor

APA, Harvard, Vancouver, ISO, and other styles

7

Khetagurov, V. A., and K. K. Sokolov. "Creation of axial expanders on magnetic supports for natural gas." Chemical and Petroleum Engineering 45, no. 9-10 (2009): 641–42. http://dx.doi.org/10.1007/s10556-010-9252-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Sultan, Ibrahim A. "Optimum design of limaçon gas expanders based on thermodynamic performance." Applied Thermal Engineering 39 (June 2012): 188–97. http://dx.doi.org/10.1016/j.applthermaleng.2012.01.039.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Zalyatdinov, A. A., and A. F. Shaykhutdinova. "INVESTIGATION OF THE IMPACT OF DRILLING WITH SIMULTANEOUS EXPANSION TO THE RATE OF CHANGE IN THE ZENITH ANGLE OF THE WELL." Problems of Gathering Treatment and Transportation of Oil and Oil Products, no. 1 (March 5, 2024): 28–35. http://dx.doi.org/10.17122/ntj-oil-2024-1-28-35.

Full text

Abstract:

The article discusses the use of various methods and techniques for isolating complication zones during drilling in the oil and gas industry. The main focus is on the process of isolating complication zones using profile closures, which allow maintaining the nominal di-ameter of the wellbore. To achieve this, it is necessary to increase the diameter of the complication interval using expanders. The article notes that the highest efficiency is achieved when drilling and expanding the wellbore simultaneously using expandable expanders. Such expanders have high wear resistance and can withstand s

APA, Harvard, Vancouver, ISO, and other styles

10

Cavalcanti, Eduardo J. C., and Monica Carvalho. "Tackling Dissipative Components Based on the SPECO Approach: A Cryogenic Heat Exchanger Used in Natural Gas Liquefaction." Energies 14, no. 20 (2021): 6850. http://dx.doi.org/10.3390/en14206850.

Full text

Abstract:

The cryogenic industry has been experiencing continuous progress in recent years, primarily due to the global development of oil and gas activities. Natural gas liquefaction is a cryogenic process, with the refrigeration system being crucial to the overall process. The objective of the study presented herein is to carry out an exergoeconomic assessment for a dual nitrogen expander process used to liquefy natural gas, employing the SPecific Exergy COsting (SPECO) methodology. The air coolers and throttling valve are dissipative components, which present fictitious unit cost rates that are reall

APA, Harvard, Vancouver, ISO, and other styles

11

Skovorodin, D. I., I. S. Chernoshtanov, V. Kh Amirov, et al. "Gas-Dynamic Multiple-Mirror Trap GDMT." Физика плазмы 49, no. 9 (2023): 831–84. http://dx.doi.org/10.31857/s0367292123600322.

Full text

Abstract:

This work is devoted to the project of a new-generation open trap, gas-dynamic multiple-mirror trap (GDMT), proposed at the Budker Institute of Nuclear Physics, Siberian Branch, Russian Academy of Sciences. The aim of the project is to substantiate the possibility of using open traps as thermonuclear systems: a source of neutrons and, in the future, a thermonuclear reactor. The main objectives of the project are to develop technologies for long-term plasma maintenance in an open trap, optimize neutron source parameters based on the gas-dynamic trap, and demonstrate methods for improving plasma

APA, Harvard, Vancouver, ISO, and other styles

12

Lee, Ying-Chi, and John H. Johnson. "Determination of sodium caprylate in plasma volume expanders by gas chromatography." Journal of Chromatography A 361 (January 1986): 279–84. http://dx.doi.org/10.1016/s0021-9673(01)86916-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Rybiński, Witold, Artur Maurin, Zbigniew Krzemianowski, and Sebastian Bykuć. "Similarity Model of a Rotary Lobe Expander Working with Various Fluids." Applied Sciences 15, no. 1 (2024): 120. https://doi.org/10.3390/app15010120.

Full text

Abstract:

This paper presents the similarity model of a rotary lobe expander (Roots expander) and calculates its power based on its other reference power. The rotors in these expanders transfer unchanged gas volume within one rotation. In this model, the expander’s construction is represented by the single value of this transferred volume. The derived model concerns the similarity of pressure loss due to the fluid viscosity, which decreases the ideal maximum power of the limiting case of no viscosity. The basic thermodynamic analysis of various fluids is also presented for this case. The novelty is the

APA, Harvard, Vancouver, ISO, and other styles

14

Li, S. S., B. Fu, Q. Y. Zhang, et al. "Cryogenic Performance Test Platform for the Gas Bearings of Helium Turbine Expanders." IOP Conference Series: Materials Science and Engineering 755 (June 30, 2020): 012028. http://dx.doi.org/10.1088/1757-899x/755/1/012028.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

YOSHIDA, Jun, Eito MATSUO, Yasuyuki TAKATA, and Masanori MONDE. "Thermodynamic analysis of high pressure hydrogen gas refueling system with turbo-expanders." Mechanical Engineering Journal 6, no. 3 (2019): 18–00388. http://dx.doi.org/10.1299/mej.18-00388.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Prilutskii, A. I. "Use of piston expanders in plants utilizing energy of compressed natural gas." Chemical and Petroleum Engineering 44, no. 3-4 (2008): 149–56. http://dx.doi.org/10.1007/s10556-008-9027-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Haselbacher, Hermann. "Performance of water/steam injected gas turbine power plants consisting of standard gas turbines and turbo expanders." International Journal of Energy Technology and Policy 3, no. 1/2 (2005): 12. http://dx.doi.org/10.1504/ijetp.2005.006737.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Hossain, Md Shazzad, Ibrahim Sultan, Truong Phung, and Apurv Kumar. "An Optimum Design for a Fast-Response Solenoid Valve: Application to a Limaçon Gas Expander." Dynamics 4, no. 2 (2024): 457–74. http://dx.doi.org/10.3390/dynamics4020024.

Full text

Abstract:

Organic Rankine Cycle (ORC)–based small-scale power plants are becoming a promising instrument in the recent drive to utilize renewable sources and reduce carbon emissions. But the effectiveness of such systems is limited by the low efficiency of gas expanders, which are the main part of an ORC system. Limaçon-based expansion machines with a fast inlet control valve have great prospects as they could potentially offer efficiencies over 50%. However, the lack of a highly reliable and significantly fast control valve is hindering its possible application. In this paper, a push–pull solenoid valv

APA, Harvard, Vancouver, ISO, and other styles

19

Liu, Zilong, Lianpeng Zhao, and Yangmin Feng. "Hydrogen Liquefaction Process with Mixed Refrigerant Pre-cooling." E3S Web of Conferences 518 (2024): 01011. http://dx.doi.org/10.1051/e3sconf/202451801011.

Full text

Abstract:

A novel hydrogen liquefaction process based on precooled mixed refrigerant is proposed in this paper. The specific energy and the exergy loss are also analyzed. The feed gas with a temperature of 302K and a pressure of 2.012MPa is first precooled to 81K with mixed refrigerant. Three refrigerant cycles with hydrogen expanders and one with throttling valves are adopted to cool the gaseous hydrogen to 21K. The proportion of para-hydrogen of the product is 99%. The specific energy consumption of the process is 9.28 kW·h/kgLH2 and the exergy efficiency is 24.3%. Furthermore, the exergy analysis ind

APA, Harvard, Vancouver, ISO, and other styles

20

Danieli, Piero, Gianluca Carraro, and Andrea Lazzaretto. "Thermodynamic and Economic Feasibility of Energy Recovery from Pressure Reduction Stations in Natural Gas Distribution Networks." Energies 13, no. 17 (2020): 4453. http://dx.doi.org/10.3390/en13174453.

Full text

Abstract:

A big amount of the pressure energy content in the natural gas distribution networks is wasted in throttling valves of pressure reduction stations (PRSs). Just a few energy recovery systems are currently installed in PRSs and are mostly composed of radial turboexpanders coupled with cogeneration internal combustion engines or gas-fired heaters providing the necessary preheating. This paper clarifies the reason for the scarce diffusion of energy recovery systems in PRSs and provides guidelines about the most feasible energy recovery technologies. Nine thousand PRSs are monitored and allocated i

APA, Harvard, Vancouver, ISO, and other styles

21

Kurkus-Gruszecka, Michalina, and Piotr Krawczyk. "Comparison of Two Single Stage Low-Pressure Rotary Lobe Expander Geometries in Terms of Operation." Energies 12, no. 23 (2019): 4512. http://dx.doi.org/10.3390/en12234512.

Full text

Abstract:

In the article the computational fluid dynamics (CFD) simulation and calculated operational parameters of the single stage low-pressure rotary lobe expander compared with the values obtained from a different geometry simulation are presented. Low-pressure rotary lobe expanders are rotary engines that use a compressed gas to produce mechanical energy, which in turn can be converted into another form, i.e., electric energy. Currently, expanders are used in narrow areas, but have a large potential in the energy production from gases of low thermodynamic parameters. The first geometry model was de

APA, Harvard, Vancouver, ISO, and other styles

22

Cammarata, Alberto, Paolo Colbertaldo, and Stefano Campanari. "Simulation of the HiPowAR power generation system for steam-nitrogen expansion after ammonia oxidation in a high-pressure oxygen membrane reactor." E3S Web of Conferences 312 (2021): 08016. http://dx.doi.org/10.1051/e3sconf/202131208016.

Full text

Abstract:

The EU project HiPowAR studies a novel power generation system based on ammonia flameless oxidation with pure oxygen in a high-pressure membrane reactor and expansion of the resulting high-temperature H2O-N2 stream. The system combines the advantages of high temperature at expander inlet, typical of gas turbines, and small compression demand, typical of steam cycles. Water is injected into the reactor to control the very high adiabatic temperature, at the limited energy expenditure of liquid pumping. This work assesses the performance potential of the HiPowAR system under different design cond

APA, Harvard, Vancouver, ISO, and other styles

23

Oskin, S. V., N. I. Bogatyrev, and N. S. Barakin. "Innovative Turbine Expanders with Asynchronous Generators for the Use of Throttled Gas Energy." IOP Conference Series: Earth and Environmental Science 272 (June 21, 2019): 022164. http://dx.doi.org/10.1088/1755-1315/272/2/022164.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Invernizzi, C. M., P. Iora, and R. Sandrini. "Biomass combined cycles based on externally fired gas turbines and organic Rankine expanders." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 225, no. 8 (2011): 1066–75. http://dx.doi.org/10.1177/0957650911415188.

Full text

Abstract:

This article investigates the possibility to enhance the performance of a biomass organic Rankine cycle (ORC) plant by adding an externally fired gas turbine (EFGT), yielding a combined EFGT + ORC system. A typical ORC configuration is first modelled and validated on data available from an existing unit 1.5 MW reference plant. Then, different working fluids belonging to the methyl-substituted benzene series and linear methylpolysiloxanes have been evaluated for the ORC section on the basis of both thermodynamics considerations and design issues of the regenerator and the turbine. Results of th

APA, Harvard, Vancouver, ISO, and other styles

25

Habibova, N. "ANALYSIS OF LOW-TEMPERATURE EXPANSION PROCESSES OF NON-IDEAL GASES." East European Scientific Journal 2, no. 11(75) (2021): 53–63. http://dx.doi.org/10.31618/essa.2782-1994.2021.2.75.161.

Full text

Abstract:

An energy analysis of the processes of obtaining and using artificial cold in chemical technology is presented. The most well-known methods of obtaining and applying the cooling effect are considered: adiabatic expansion of vapor and gaseous bodies in expanders, throttling. Special attention is paid to the effect of object deviation from the ideal gas model.

APA, Harvard, Vancouver, ISO, and other styles

26

Lim, Hyungsoo, Jeongmin Seo, Mooryong Park, et al. "A Numerical Study on Blade Design and Optimization of a Helium Expander for a Hydrogen Liquefaction Plant." Applied Sciences 12, no. 3 (2022): 1411. http://dx.doi.org/10.3390/app12031411.

Full text

Abstract:

A design process for cryogenic expanders that supplies 0.5 TPD of liquefied hydrogen in hydrogen liquefaction plants is introduced. To improve the efficiency of the expander, the optimum design was conducted by adjusting two rotor shape parameters. The designed expander for hydrogen liquefaction has a target rotation speed of 75,000 rpm, and helium is applied as the working fluid. Since the operating temperature of the expander is as low as 49 K, a design that reflects the real gas properties must be considered. For a high-efficiency hydrogen liquefaction plant, increasing the expander efficie

APA, Harvard, Vancouver, ISO, and other styles

27

Nakhamkin, M., E. C. Swensen, J. M. Wilson, G. Gaul, and M. Polsky. "The Cascaded Humidified Advanced Turbine (CHAT)." Journal of Engineering for Gas Turbines and Power 118, no. 3 (1996): 565–71. http://dx.doi.org/10.1115/1.2816685.

Full text

Abstract:

This paper introduces the Cascaded Humidified Advanced Turbine (CHAT) plant, a gas turbine based power generation plant utilizing intercooling, reheat, and humidification. It is based upon the integration of an existing heavy duty gas turbine with an additional shaft comprising industrial compressors and high pressure expander. CHAT capitalizes on the latest proven gas turbine technology, which, combined with a sophisticated thermal cycle configuration, results in substantial improvement in gas turbine efficiency, compared to a simple cycle, while still maintaining typical advantages and merit

APA, Harvard, Vancouver, ISO, and other styles

28

Spale, Jan, Guk Chol Jun, Vaclav Novotny, Philipp Streit, Andreas P. Weiß, and Michal Kolovratnik. "Development of a 10 kW class axial impulse single stage turboexpander for a micro-CHP ORC unit." EPJ Web of Conferences 264 (2022): 01044. http://dx.doi.org/10.1051/epjconf/202226401044.

Full text

Abstract:

Development of micro ORC systems with 1-15 kW power output for micro-cogeneration and waste heat recovery at the Czech Technical University in Prague, University Centre for Energy Efficient Buildings (CTU UCEEB) has over ten years of history with many successes. These include 6 different ORC units, all with in-house designed rotary vane expanders (RVE) of many versions throughout this development. Among main advantages of the RVE belong relatively simple and robust design at low cost even at very small series of single-unit production and all that with acceptable efficiency. The ORC units oper

APA, Harvard, Vancouver, ISO, and other styles

29

Sun, Jian, Bin Peng, Bingguo Zhu, and Yaohong Li. "Analysis of Tangential Leakage Flow Characteristics of Oil-Free Scroll Expander for a Micro-Scale Compressed Air Energy Storage System." Entropy 25, no. 2 (2023): 339. http://dx.doi.org/10.3390/e25020339.

Full text

Abstract:

Tangential leakage loss is the primary factor that significantly affects the output performance of oil-free scroll expanders. A scroll expander can function under different operating conditions, and the flow of tangential leakage and generation mechanism is different. This study employed computational fluid dynamics to investigate the unsteady flow characteristics of the tangential leakage flow of a scroll expander with air as the working fluid. Consequently, the effects of different radial gap sizes, rotational speeds, inlet pressures, and temperatures on the tangential leakage were discussed

APA, Harvard, Vancouver, ISO, and other styles

30

Hossain, Md Shazzad, Ibrahim Sultan, Truong Phung, and Apurv Kumar. "Performance Improvement of a Limaçon Gas Expander Using an Inlet Control Valve: Two Case Studies." Energies 17, no. 10 (2024): 2427. http://dx.doi.org/10.3390/en17102427.

Full text

Abstract:

Renewable energy-based compact energy-generation systems based on the organic Rankine cycle (ORC) can be employed to meet the ever-growing thirst for affordable and clean energy. The overall performance and effectiveness of ORC systems are constrained by the low efficiency of the gas expander, specifically the positive displacement expander, which is responsible for energy conversion from the working fluid. This low-efficiency scenario can be significantly improved by employing a control valve to regulate and restrict the flow of the working fluid into the expander. A control valve can effecti

APA, Harvard, Vancouver, ISO, and other styles

31

Gräßer, Melanie, and Andreas Brümmer. "Influence of water and oil clearance flow on the operational behavior of screw expanders." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, no. 1 (2016): 38–46. http://dx.doi.org/10.1177/0954408916667411.

Full text

Abstract:

Currently, the simulation of multi-phase rotary displacement machines in reasonable accordance with the experimental results is not possible. Clearance sealing, additional frictional losses, heat transfer and lubrication are among the various effects caused by the presence of a liquid, which would all have to be modelled. Moreover, complex processes, such as condensation and evaporation affecting the thermodynamic equilibrium, as well as expansion of the multi-phase gas-liquid-mixture would have to be included. With the purpose of achieving a better understanding of liquid-flooded screw expand

APA, Harvard, Vancouver, ISO, and other styles

32

Krawczyk, Piotr, Michalina Kurkus-Gruszecka, Aleksandra Mikolajczak, Piotr Lapka, and Krzysztof Badyda. "Computational fluid dynamic analysis and validation of the single stage low pressure rotary lobe compressed air expander." Thermal Science 23, Suppl. 4 (2019): 1133–42. http://dx.doi.org/10.2298/tsci19s4133k.

Full text

Abstract:

Technologies using media with relatively low thermodynamic parameters are now being developed more and more widely. These technologies may be used in industrial processes in which waste media such as low pressure air or other gases are available. One of the technologies enabling the use of such gases is rotary lobe expander. Rotary lobe expanders are compressed gas-powered devices which produce electricity or mechanical energy. In terms of the nature of operation, these devices are similar to turbines, but have higher efficiency at lower operating pressure. Currently, they are applied in mines

APA, Harvard, Vancouver, ISO, and other styles

33

Katla, Daria, Łukasz Bartela, and Anna Skorek-Osikowska. "Evaluation of electricity generation subsystem of Power-to-Gas-to-Power unit using gas expander and heat recovery steam generator." E3S Web of Conferences 137 (2019): 01017. http://dx.doi.org/10.1051/e3sconf/201913701017.

Full text

Abstract:

In the last years, the European energy policy has required to increase the share of renewable energy sources in the national energy systems. It is important to diversify the energy system not to bring about a global crisis resulting from the fundamental lack of electricity. Unfortunately renewable sources are unstable and generate several problems during integration with the power grid. The solution is to store additional energy produced from renewable sources. In this way, energy can be used when there is a need. The paper discusses the study of the Power-to-Gas-to-Power installation using el

APA, Harvard, Vancouver, ISO, and other styles

34

Kairn, T., M. Lathouras, S. Sylvander, and S. Crowe. "PO-1421: Investigating dose calculation accuracy around gas-filled tissue expanders using 3D-printed phantoms." Radiotherapy and Oncology 152 (November 2020): S755. http://dx.doi.org/10.1016/s0167-8140(21)01439-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Faddeev, I. P. "Turbo expanders to utilize the pressure of natural gas delivered to Saint Petersburg and industrial centers." Chemical and Petroleum Engineering 34, no. 11 (1998): 704–11. http://dx.doi.org/10.1007/bf02418862.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Osborne, Deborah A., and Luis San Andre´s. "Experimental Response of Simple Gas Hybrid Bearings for Oil-Free Turbomachinery." Journal of Engineering for Gas Turbines and Power 128, no. 3 (2006): 626–33. http://dx.doi.org/10.1115/1.1839922.

Full text

Abstract:

Gas film bearings offer unique advantages enabling successful deployment of high-speed microturbomachinery (<0.4 MW). Current applications encompass micropower generators, air cycle machines and turbo expanders. Mechanically complex gas foil bearings are in use; however, their excessive cost and lack of calibrated predictive tools deters their application to mass-produced systems. The present investigation provides experimental results for the rotordynamic performance of a small rotor supported on simple and inexpensive hybrid gas bearings with static and dynamic force characteristics desir

APA, Harvard, Vancouver, ISO, and other styles

37

Stathopoulos, Panagiotis. "Comprehensive Thermodynamic Analysis of the Humphrey Cycle for Gas Turbines with Pressure Gain Combustion." Energies 11, no. 12 (2018): 3521. http://dx.doi.org/10.3390/en11123521.

Full text

Abstract:

Conventional gas turbines are approaching their efficiency limits and performance gains are becoming increasingly difficult to achieve. Pressure Gain Combustion (PGC) has emerged as a very promising technology in this respect, due to the higher thermal efficiency of the respective ideal gas turbine thermodynamic cycles. Up to date, only very simplified models of open cycle gas turbines with pressure gain combustion have been considered. However, the integration of a fundamentally different combustion technology will be inherently connected with additional losses. Entropy generation in the comb

APA, Harvard, Vancouver, ISO, and other styles

38

Ismayilov, Sh Z., Y. Y. Shmoncheva, and G. V. Jabbarova. "Development of expandable pipe technology: double-acting expander." Scientific Petroleum, no. 1 (June 30, 2024): 44–49. http://dx.doi.org/10.53404/sci.petro.20240100056.

Full text

Abstract:

Drilling wells presents a number of problems such as loss of circulation, wellbore instability, stuck pipe due to differential pressure or mechanical problems, and increased formation damage. Traditionally, these problems have been addressed by installing additional casing, resulting in a reduction in wellbore diameter. However, the use of expandable tubing technology within the wellbore can effectively mitigate these problems, potentially eliminating the telescoping effect associated with traditional well designs. This technology allows wells to be completed without reducing the planned diame

APA, Harvard, Vancouver, ISO, and other styles

39

Wołowicz, Marcin, Piotr Kolasiński, and Krzysztof Badyda. "Modern Small and Microcogeneration Systems—A Review." Energies 14, no. 3 (2021): 785. http://dx.doi.org/10.3390/en14030785.

Full text

Abstract:

Small and micro energy sources are becoming increasingly important in the current environmental conditions. Especially, the production of electricity and heat in so-called cogeneration systems allows for significant primary energy savings thanks to their high generation efficiency (up to 90%). This article provides an overview of the currently used and developed technologies applied in small and micro cogeneration systems i.e., Stirling engines, gas and steam microturbines, various types of volumetric expanders (vane, lobe, screw, piston, Wankel, gerotor) and fuel cells. Their basic features,

APA, Harvard, Vancouver, ISO, and other styles

40

Rahman, Mohammed Mahbubur. "POWER GENERATION FROM PRESSURE REDUCTION IN THE NATURAL." Journal of Mechanical Engineering 41, no. 2 (2011): 89–95. http://dx.doi.org/10.3329/jme.v41i2.7472.

Full text

Abstract:

Power can be generated from the pressure energy of natural gas along its supply chain at various pressure reduction points by using turbo-expanders. This technology is being applied in different countries around the world. This paper attempts to asses the potential of using this technology for Bangladesh. A number of producing wells and pressure reduction stations are investigated. It is found that pre-heating before expansion is almost always necessary to avoid hydrate formation. The power obtainable at the wellheads range from 150-500 kW, and that from pressure reduction stations range from

APA, Harvard, Vancouver, ISO, and other styles

41

Kolasiński, Piotr, Michał Pomorski, Przemysław Błasiak, and Józef Rak. "Use of Rolling Piston Expanders for Energy Regeneration in Natural Gas Pressure Reduction Stations—Selected Thermodynamic Issues." Applied Sciences 7, no. 6 (2017): 535. http://dx.doi.org/10.3390/app7060535.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Syaukani, Muhammad, Szymon Lech, Sindu Daniarta, and Piotr Kolasiński. "A Systematic Review of Two-Phase Expansion Losses: Challenges, Optimization Opportunities, and Future Research Directions." Energies 18, no. 13 (2025): 3504. https://doi.org/10.3390/en18133504.

Full text

Abstract:

Two-phase expansion processes have emerged as a promising technology for enhancing energy efficiency in power generation, refrigeration, waste heat recovery systems (for example, partially evaporated organic Rankine cycle, organic flash cycle, and trilateral flash cycle), oil and gas, and other applications. However, despite their potential, widespread adoption is hindered by inherent challenges, particularly energy losses that reduce operational efficiency. This review systematically evaluates the current state of two-phase expansion technologies, focusing on the root causes, impacts, and mit

APA, Harvard, Vancouver, ISO, and other styles

43

Qiu, Shun, Changlei Ke, Kongrong Li, Xiaohua Zhang, Nan Peng, and Liqiang Liu. "Investigation on the dynamic response of aerostatic bearing-rotor system with different bearing gases." IOP Conference Series: Materials Science and Engineering 1327, no. 1 (2025): 012069. https://doi.org/10.1088/1757-899x/1327/1/012069.

Full text

Abstract:

Abstract Due to their low friction and long lifespan, aerostatic bearings are widely used in high-speed cryogenic turbo expanders. Variations in bearing gas viscosity and density lead to differences in the static and dynamic characteristics of these bearings. In this study, a fluid-structure coupled model of the bearing-rotor system is established. The bearing lubricant equation and rotor motion equation are solved simultaneously to obtain the nonlinear dynamic response of the system. The findings reveal that the system exhibits rich nonlinear phenomena, indicating that the load capacity of he

APA, Harvard, Vancouver, ISO, and other styles

44

Cappiello, Alessandro, and Raffaele Tuccillo. "Design and CFD Analysis of a Radial-Inflow Turbine for Small Scale ORC Applications." E3S Web of Conferences 197 (2020): 11005. http://dx.doi.org/10.1051/e3sconf/202019711005.

Full text

Abstract:

In recent years, Organic Rankine Cycle (ORC) technology has received growing interests, thanks to its high flexibility and to the capability to exploit energy sources at temperature levels difficult to be approached with conventional power cycles. These features allow exploiting renewable and renewable-equivalent energy sources, by either improving the energy conversion efficiency of existing plants or using waste heat from industrial process. As far as the expander is concerned, a high potential solution is represented by turbo-expanders, which allow reduction of plant clutter and complexity,

APA, Harvard, Vancouver, ISO, and other styles

45

Zafar, S., and T. K. Nandi. "Numerical investigations on pressure wave refrigerators for sizing the dump tank and studying its effect on the operating frequency at first peak efficiency." IOP Conference Series: Materials Science and Engineering 1327, no. 1 (2025): 012180. https://doi.org/10.1088/1757-899x/1327/1/012180.

Full text

Abstract:

Abstract Pressure Wave Refrigerators (PWRs), in principle, work with thermal separation through shock waves. A PWR typically comprises a rotating gas distributor that periodically injects high-pressure gas into one or more stationary receiving tubes. The sudden release of high-pressure gas in a tube or channel produces shock waves that heat up the residual gas towards the dead end, while the rarefied waves produce refrigeration in the driver gas at the nozzle end. Upon connection to the outlet port, the refrigerated gas flows out of the receiving tube into a receiver. PWRs have several advanta

APA, Harvard, Vancouver, ISO, and other styles

46

San Andrés, Luis. "Hybrid Flexure Pivot-Tilting Pad Gas Bearings: Analysis and Experimental Validation." Journal of Tribology 128, no. 3 (2006): 551–58. http://dx.doi.org/10.1115/1.2194918.

Full text

Abstract:

Gas film bearings offer unique advantages enabling successful deployment of high-speed microturbomachinery. Current applications encompass micro power generators, air cycle machines, and turbo expanders. Mechanically complex gas foil bearings are in use; however, their excessive cost and lack of calibrated predictive tools deter their application to mass-produced oil-free turbochargers, for example. The present investigation advances the analysis and experimental validation of hybrid gas bearings with static and dynamic force characteristics desirable in high-speed turbomachinery. These charac

APA, Harvard, Vancouver, ISO, and other styles

47

Mazzarino, Monica, Francesca De Angelis, Teresa Di Cicco, Xavier de la Torre, and Francesco Botrè. "Microwave irradiation for a fast gas chromatography–mass spectrometric analysis of polysaccharide-based plasma volume expanders in human urine." Journal of Chromatography B 878, no. 29 (2010): 3024–32. http://dx.doi.org/10.1016/j.jchromb.2010.08.046.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Fang, Juan, Yonghong Xu, Hongguang Zhang, Zhi Yang, Jifang Wan, and Zhengguang Liu. "Experimental Research on the Output Performance of Scroll Compressor for Micro Scale Compressed Air Energy Storage System." Sustainability 15, no. 21 (2023): 15665. http://dx.doi.org/10.3390/su152115665.

Full text

Abstract:

Micro compressed air energy storage systems are a research hotspot in the field of compressed air energy storage technology. Compressors and expanders are the core equipment for energy conversion, and their performance has a significant impact on the performance of the entire compressed air energy storage system. Scroll compressors have the advantages of small size, low noise, light weight, low vibration, long service life, continuous and stable gas transmission, and reliable operation. This article builds a micro compressed air energy storage system based on a scroll compressor and studies th

APA, Harvard, Vancouver, ISO, and other styles

49

Yusha, V. L., G. I. Chernov, I. D. Obukhov, et al. "Multipurpose conversion of marine diesel engines when creating piston motor-compressor units." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 5, no. 3 (2021): 14–22. http://dx.doi.org/10.25206/2588-0373-2021-5-3-14-22.

Full text

Abstract:

This paper present an assessment of the energy efficiency of various combinations of piston stages of an internal combustion engine, a compressor, and a Rankine engine as part of piston motor-compressor units based on modernized marine diesel engines. An eight-cylinder single-row diesel engine 8Ch23/30-1 is chosen as the object of research, the base of which is used as a single platform for creating powertechnology units for various purposes and power. The proposed variants for converting the original engine allow, with minimal costs for the development of design and manufacturing technology,

APA, Harvard, Vancouver, ISO, and other styles

50

Postupaev, V. V., V. I. Batkin, I. A. Ivanov, et al. "Detached Plasma Studies in GOL-NB with Extra Gas Injection." Fizika plazmy 50, no. 2 (2024): 168–79. http://dx.doi.org/10.31857/s0367292124020021.

Full text

Abstract:

The magnetic system of an open trap usually includes expansion sections located between highfield magnetic mirrors and end surfaces that receive plasma. In the GOL-NB device, an arc plasma gun is located in one of the expanders, which creates a low-temperature starting plasma in the confinement area. The parameters of the surface plasma sheath affect the electrical connection of the confinement area with the walls and, thereby, affect the contribution of the line-tying effect to the plasma stability and the longitudinal energy losses from the trap. The experiments with additional hydrogen inje

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!