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Journal articles on the topic 'Turbo expanders'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Adams, Jacob, Nathaniel O’Connor, Matthew Jones, and John Brisson. "Experimental improvements to the acoustic expander with applications to cryogenic refrigeration." IOP Conference Series: Materials Science and Engineering 1327, no. 1 (2025): 012146. https://doi.org/10.1088/1757-899x/1327/1/012146.

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Abstract The acoustic expander is an innovative cryogenic component that uses pressure waves for work transfer as part of a continuous flow, recuperative cycle refrigerator. This expander uses passive reed-valves coupled to an acoustic resonator to produce refrigeration. The passive reed-valves are pressure-controlled by the imposed, static pressure difference across the expander and the natural oscillating pressure in the resonator. The resonator is a series of tubes and cones. The practical implications of these simple components are that the acoustic expander does not require controlled val

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2

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.

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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

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3

Antipenkov, B. A., A. B. Davydov, A. Sh Kobulashvili, G. A. Perestoronin, and A. A. Fal'chenko. "Turbo-expanders for mobile air separation equipment." Chemical and Petroleum Engineering 21, no. 3 (1985): 125–27. http://dx.doi.org/10.1007/bf01154881.

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4

Adams, Jacob L., and J. G. Brisson. "Acoustic expanders for use in recuperative cryocoolers." IOP Conference Series: Materials Science and Engineering 1301, no. 1 (2024): 012134. http://dx.doi.org/10.1088/1757-899x/1301/1/012134.

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Abstract An acoustic expander has been developed for use in recuperative cryocoolers. The acoustic expander uses reed-valves to generate a standing acoustic wave from a continuously expanding flow. The mechanical energy from the wave is passively dissipated to the ambient environment. The acoustic expander does not require complex moving parts or control mechanisms at low-temperature; in contrast to piston- or turbo-expanders that require moving displacers or spinning shafts. This expander has demonstrated isentropic expansion efficiencies of 50% for a pressure ratio of 1.4 and expansion effic

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Martyanov, O. A., and V. I. Merkulov. "Overview of the problem of moist air flow in turbo-expanders." Izvestiya MGTU MAMI 8, no. 4-1 (2014): 51–55. http://dx.doi.org/10.17816/2074-0530-67673.

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6

Ke, Changlei, Lianyou Xiong, Nan Peng, et al. "Efficiency Improvement of Small Cryogenic Helium Turbo-expanders in TIPC." IOP Conference Series: Materials Science and Engineering 1301, no. 1 (2024): 012028. http://dx.doi.org/10.1088/1757-899x/1301/1/012028.

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Abstract An experimental helium liquefier/refrigerator, using ultra high speed cryogenic turbo-expanders is designed and developed in Technical Institute of Physics and Chemistry (TIPC), and liquefaction rate of around 42 L/hr and refrigeration capacity of around 130 W @ 4.5 K is achieved. The turbo-expander constitutes the most critical component of a helium liquefier/refrigerator causing that the turbine efficiency has a great influence on the performance of the whole cryogenic process plant. Inlet Flow Radial (IFR) turbine design is dictated by criteria like velocity ratios. For small flow

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NAKAYAMA, Yoshihiro, Tetsuro MATSUMOTO, and Sadao SATO. "Cool-down characteristics of helium liquefier with turbo-expanders." TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 23, no. 1 (1988): 23–29. http://dx.doi.org/10.2221/jcsj.23.23.

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8

Barmby, T. H., and A. Cleveland. "Control Systems for Turbo Expanders in Pressure Reduction Service." Journal of Engineering for Gas Turbines and Power 113, no. 2 (1991): 296–99. http://dx.doi.org/10.1115/1.2906562.

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9

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.

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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

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10

Renuke, Avinash, Alberto Traverso, and Matteo Pascenti. "Experimental Campaign Tests on a Tesla Micro-Expanders." E3S Web of Conferences 113 (2019): 03015. http://dx.doi.org/10.1051/e3sconf/201911303015.

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This paper presents the experimental campaign on Tesla turbo expanders carried out at Thermo-chemical Power group (TPG) of University of Genoa, Italy. An experiment system is established using compressed air as a working fluid. A 200 W turbine is tested with rotational speed up to 40000 rpm. Experimental analysis focused mainly on the efficiency features of this expander, showing the impact on performance of different disk gaps, disk thickness, discharge holes, exhaust geometry, as a function of speed and mass flow. An improved version of 3 kW air Tesla turboexpander is built. Preliminary expe

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11

Pietro, Bartocci, Abad Alberto, MAttisson Tobias, et al. "Bioenergy with Carbon Capture and Storage (BECCS) developed by coupling a Pressurised Chemical Looping combustor with a turbo expander: How to optimize plant efficiency." Renewable and Sustainable Energy Reviews 169 (September 25, 2022): 112851. https://doi.org/10.5281/zenodo.7317240.

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Carbon Capture and Storage is a technology of paramount importance for the fulfillment of the Sustainable Development Goal 7 (Affordable and Clean Energy) and the Sustainable Development Goal 5 (Climate Action). The European Union is moving rapidly towards low carbon technologies, for instance via the Energy Union Strategy. Coupling biofuels and carbon capture and storage to decarbonize the power and the industrial sector can be done through the development of BECCS (Bioenergy with Carbon Capture and Storage). Chemical Looping combustion is one of the cheapest way to capture CO2. A Chemical Lo

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12

Arifin, M., and A. D. Pasek. "Design of Radial Turbo-Expanders for Small Organic Rankine Cycle System." IOP Conference Series: Materials Science and Engineering 88 (September 23, 2015): 012037. http://dx.doi.org/10.1088/1757-899x/88/1/012037.

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13

Fiaschi, Daniele, Giampaolo Manfrida, and Francesco Maraschiello. "Thermo-fluid dynamics preliminary design of turbo-expanders for ORC cycles." Applied Energy 97 (September 2012): 601–8. http://dx.doi.org/10.1016/j.apenergy.2012.02.033.

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14

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.

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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

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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.

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16

Costall, A. W., A. Gonzalez Hernandez, P. J. Newton, and R. F. Martinez-Botas. "Design methodology for radial turbo expanders in mobile organic Rankine cycle applications." Applied Energy 157 (November 2015): 729–43. http://dx.doi.org/10.1016/j.apenergy.2015.02.072.

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17

Zhou, Kaimiao, Liang Chen, Haodong Wang, et al. "Comparison of mean-line methods for hydrogen turbo-expanders in hydrogen liquefiers." Case Studies in Thermal Engineering 60 (August 2024): 104632. http://dx.doi.org/10.1016/j.csite.2024.104632.

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18

Taleshian, Mehdi, Hasan Rastegar, and Hossein Askarian Abyaneh. "Modeling and Power Quality Improvement of Grid Connected Induction Generators Driven by Turbo-Expanders." International Journal of Energy Engineering 2, no. 4 (2012): 131–37. http://dx.doi.org/10.5923/j.ijee.20120204.04.

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19

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.

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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

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20

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.

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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

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21

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.

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22

Liu, Hongmin, Jiansheng Zuo, Shun Qiu, et al. "Simulative and experimental analysis of high-speed helium turbo-expanders in a 5t/day hydrogen liquefier." International Journal of Hydrogen Energy 133 (June 2025): 152–64. https://doi.org/10.1016/j.ijhydene.2025.04.403.

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23

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.

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24

Weiß, Andreas P., Václav Novotný, Tobias Popp, et al. "Customized ORC micro turbo-expanders - From 1D design to modular construction kit and prospects of additive manufacturing." Energy 209 (October 2020): 118407. http://dx.doi.org/10.1016/j.energy.2020.118407.

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25

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.

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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

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26

Haghjoo, Hossein, Emad Aram, Gholamreza Ahmadi, and Davood Toghraie. "Energy, exergy, economic, and environmental analyses and multi-objective optimisation of using turbo-expanders in natural gas pressure reduction stations." International Journal of Exergy 38, no. 2 (2022): 238. http://dx.doi.org/10.1504/ijex.2022.123607.

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27

Haghjoo, Hossein, Emad Aram, Gholamreza Ahmadi, and Davood Toghraie. "Energy, exergy, economic, and environmental analyses and multi-objective optimisation of using turbo-expanders in natural gas pressure reduction stations." International Journal of Exergy 38, no. 2 (2022): 238. http://dx.doi.org/10.1504/ijex.2022.10048293.

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28

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.

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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,

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29

Fedorova, M. A. "I. Ivkovic-Kihic, M. Read, Sh. Rane, A. Kovacevic. «Compressors and their systems». Post conference report / trans. from Engl. M. A. Fedorova." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 6, no. 1 (2022): 86–91. http://dx.doi.org/10.25206/2588-0373-2022-6-1-86-91.

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The article presents an overview report of the 12th International Conference on Compressors and their systems which was held in a hybrid format from September 6 to 8, 2022 in the City, University of London, UK. At this prestigious scientific and educational forum, within the framework of the plenary session, world experts made reports in the field of compressor technology and de-carbonization, as well as presentations at several technical and panel sessions on such topics as screw, scroll, vane and piston compressors; compressor systems and their diagnostic and control systems; turbo-machines;

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30

Abdul, Mannan Ansari* Vinod Sehrawat Tarun Gupta. "OPERATING PARAMETERS ACCUMULATION OF HELIUM LIQUEFICATION SYSTEM: (H.E & TURBINE)." INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY 5, no. 8 (2016): 554–58. https://doi.org/10.5281/zenodo.60098.

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Present work involves analysis and optimization of the process parameters (like helium flow rate, pressure and temp.) for main components as (eight different heat exchangers as well as three different turbo-expanders) of helium liquefaction plant of refrigeration capacity 1 kW at 4.5 K. Nevertheless, this plant can be operated in mixed mode also as helium refrigerator-cum-liquefier, although it is optimized for refrigeration load. To optimize process of any helium refrigeration/liquefaction system, this is important to consider one independent variable at a time and under valid assumptions, an

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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.

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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

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32

Liu, Hongmin, Jiansheng Zuo, Shun Qiu, et al. "Corrigendum to “Simulative and experimental analysis of high-speed helium turbo-expanders in a 5t/day hydrogen liquefier” [Int J Hydrog Energy, 133 (2025) 152-164]." International Journal of Hydrogen Energy 145 (July 2025): 841. https://doi.org/10.1016/j.ijhydene.2025.05.325.

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33

Sahu, A. K., O. Chandratre, H. Kavad, et al. "Development of Cold Box for Upgradable Helium Refrigerator Plant of 200 W at 4.5 K." IOP Conference Series: Materials Science and Engineering 1327, no. 1 (2025): 012033. https://doi.org/10.1088/1757-899x/1327/1/012033.

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Abstract The cold box for helium refrigerator plant of cooling power ~200 W at 4.5 K has been developed at IPR, Gandhinagar, India. Helium compressor system, which gives helium flow ~60 g/s at 14 bar, has been used for this plant. The cold box of the plant is made using a vertical vacuum chamber, within which all cold components are assembled. The thermodynamic process used is a modified Claude Cycle. This cold box has 7 plate-fin heat exchangers, 3 turbo-expanders, an 80 K helium purifier and a JT valve. LN2 pre-cooling is used in the cold box to ensure 80 K before the helium purifier. Turbin

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34

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.

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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

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35

Dalesandro, A., A. Weiner, J. P. Kelley, et al. "The SPARC cryogenic system." IOP Conference Series: Materials Science and Engineering 1301, no. 1 (2024): 012107. http://dx.doi.org/10.1088/1757-899x/1301/1/012107.

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Abstract The SPARC project at Commonwealth Fusion Systems (CFS) is a tokamak system designed to demonstrate commercially relevant fusion energy and achieve net fusion power output during the first operating campaign, with eventual fusion pulse energies exceeding 1 GJ. The SPARC tokamak includes eight magnet systems, three that use high-temperature superconducting (HTS) tapes. The SPARC cryogenic system (CRYO) consists of three supercritical helium cryogenic loops at nominal temperatures of 8 K, 15 K, and 80 K. CRYO 8 K and 15 K loops cool the HTS magnets to maintain thermal stability and preve

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36

Hasan, N., V. Ganni, P. Knudsen, F. Casagrande, and J. Howard. "Process design for FRIB’s experimental refrigeration system." IOP Conference Series: Materials Science and Engineering 1301, no. 1 (2024): 012130. http://dx.doi.org/10.1088/1757-899x/1301/1/012130.

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Abstract The experimental system (ES) for the Facility for Rare Isotope Beams (FRIB) at Michigan State University (MSU) has several segments. Following the acceleration through the three superconducting LINAC segments, the heavy ion beam is guided through the target, a fragment pre-separator and (the A1900) separator segments. There are many beam lines and then it can be split and sent to various experimental vaults and instrumentation, e.g. S800 spectrograph, and the newly proposed High Rigidity Spectrometer (HRS). Presently, superconducting magnets at the target and fragment pre-separator se

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37

Olumide, Akindele Owulade, Raymond Isi Lawani, Amos Essien Nkese, Isaac Tokunbo Olugbemi Gilbert, and Ogu Elemele. "Comprehensive Review of Climate Change Mitigation through Cutting-edge LNG Technologies." Engineering and Technology Journal 10, no. 05 (2025): 4789–96. https://doi.org/10.5281/zenodo.15342393.

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This paper comprehensively reviews the potential of cutting-edge LNG technologies to mitigate climate change .We explore advancements in liquefaction processes, focusing on cryogenic heat exchangers, mixed refrigerant cycles, and turbo molecular expanders, aiming to improve efficiency and reduce energy consumption. Carbon capture and storage (CCS) technologies are examined as a strategy to capture and store CO2 emissions generated during LNG production. Novel approaches to methane emissions reduction, such as advanced leak detection and repair, membrane-based technologies, and utilization of b

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38

Moiseiev, Sergiy, Maksym Novikov, Arkadii Burniashev, et al. "DEVELOPMENT OF BREAKTHROUGH TECHNOLOGIES FOR STRENGTHENING OF TURBO-EXPANSION INSTALLATIONS ELEMENTS." Bulletin of the National Technical University «KhPI» Series: Engineering and CAD, no. 1 (June 7, 2023): 53–67. http://dx.doi.org/10.20998/2079-0775.2023.1.06.

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The paper is aimed at the development of breakthrough technologies for the strengthening of turbo-expander installations. For this purpose, new ways proposed for ensuring the strength of the most hardly loaded elements of turbo-expander installations. They involve a combination of known methods of discrete and continuous strengthening. However, at the same time, the problem of justification of rational parameters and modes of technological operations arises. This problem is caused by the fact that such complex strengthening methods are characterized by a significantly expanded set of varied pa

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Jelodar, Mehdi Taleshian, Hasan Rastegar, and Hossein Askarian Abyaneh. "Modeling turbo-expander systems." SIMULATION 89, no. 2 (2013): 234–48. http://dx.doi.org/10.1177/0037549712469661.

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Chuang, P. S., H. H. Tsai, H. W. Chiang, et al. "Design and analysis of the helium purification system for the NSRRC cryogenic system." IOP Conference Series: Materials Science and Engineering 1240, no. 1 (2022): 012090. http://dx.doi.org/10.1088/1757-899x/1240/1/012090.

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Abstract Helium is an expensive consumable in cryogenic facilities and is used widely in space, medical and energy research. At NSRRC, liquid helium is used as a coolant for superconducting magnets and SRF cavities . Minor contaminants such as nitrogen, oxygen, moisture and oil will be picked up when liquid helium circulates in large scale cryogenic systems and such contaminants can crystalize and cause damage to the cold box turbo expanders resulting in system damage and failure . Therefore, a helium purification system is designed as an integral part of the cryogenic system to conserve heliu

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Ovsyannik, A. V., and V. P. Kliuchinski. "Turbo-Expander Units on Low Boiling Working Fluids." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 64, no. 1 (2021): 65–77. http://dx.doi.org/10.21122/1029-7448-2021-64-1-65-77.

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The article examines the possibility of increasing the efficiency of the turbo-expander cycles on low-boiling working fluids using those methods that are used for steam turbines, viz. increasing the parameters of the working fluid before the turbo-expander and using secondary overheating. Thus, four schemes of the turbo-expander cycle are considered: the one without overheating of the low-boiling working fluid, the one with single overheating of low-boiling fluid, the one with double overheating and the one with double overheating at supercritical parameters. All the studied cycles were consid

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42

Majer, Matteo, and Matteo Pini. "Design guidelines for high-pressure ratio supersonic radial-inflow turbines of organic rankine cycle systems." Journal of the Global Power and Propulsion Society 9 (April 11, 2025): 19–46. https://doi.org/10.33737/jgpps/195437.

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The radial-inflow turbine (RIT) is a widely adopted turbo-expander in power and propulsion systems of low-to-medium power capacity due to its high efficiency and compactness. Compared to conventional radial turbines for gas turbines and air cycle machines, the design of expanders for high-temperature organic Rankine cycle power systems involves additional challenges, as these machines operate with very high expansion or volumetric flow ratio and partly or entirely in the nonideal compressible fluid dynamic regime. This study examines the impact of the working fluid, of the volumetric flow rati

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43

Tkachuk, Mykola, Gennadiy Lvov, Sergey Kravchenko, et al. "Substantiating promising technical solutions for turbo- expander power plants based on the research into working processes and states." Eastern-European Journal of Enterprise Technologies 4, no. 7 (124) (2023): 98–105. http://dx.doi.org/10.15587/1729-4061.2023.285865.

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One of the most rational methods of energy utilization of compressed gas in pipelines is to use turbo-expander installations. In particular, these are autonomous turbo-expander power stations. A fundamentally new concept has been devised to improve the technical and economic performance of this type of machines. This concept is not focused on a separate aspect of the plant's operation but on their entire set. In particular, physical principles, structures, and technologies were considered as an object of research. First, effective parameters of gas-dynamic flows and heat-mass transfer were det

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Lee, Jonghoon, Sungryeol Kim, Dabin Son, and Sangwook Han. "A Study on the Replacement of Self-starting Generators using Turbo Expander Generator." TRANSACTION OF THE KOREAN INSTITUTE OF ELECTRICAL ENGINEERS P 71, no. 4 (2022): 281–86. http://dx.doi.org/10.5370/kieep.2022.71.4.281.

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Tkachuk, Mykola А., Maksym Novikov, Mykola M. Tkachuk, et al. "AREAS AND STAGES OF DESIGN AND TECHNOLOGICAL SUPPORT FOR ENHANCED PERFORMANCE OF TURBO-EXPANDER POWER PLANTS." Bulletin of the National Technical University «KhPI» Series: Engineering and CAD, no. 2 (December 18, 2023): 106–12. http://dx.doi.org/10.20998/2079-0775.2023.2.11.

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The paper describes an integrated approach to the design and technological support of enhanced performance of turbo-expander power plants. An analysis of the current state of development of turboexpander power plants has made it possible to establish that traditional approaches have largely exhausted the possibilities of improving their technical characteristics. Moreover, a situation is emerging where, in order to ensure the improvement of such characteristics, it is necessary to involve not isolated design or technological measures, but joint design and technological measures. To implement t

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Ovsyannik, A. V., and V. P. Kliuchinski. "Thermodynamic Analysis and Optimization of Secondary Overheating Parameters in Turbo-Expander Plants on Low Boiling Working Fluids." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 64, no. 2 (2021): 164–77. http://dx.doi.org/10.21122/1029-7448-2021-64-2-164-177.

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The paper presents a thermodynamic analysis of secondary overheating in turbo-expander plants on low-boiling working fluids. The possibility of optimizing the parameters of the working fluid in a secondary stem superheater has been studied. The research was carried out for two typical turbo-expander cycles: with a heat exchanger at the outlet of the turbo-expander, intended for cooling an overheated low-boiling working fluid, and without a heat exchanger. Cycles in T–s coordinates were constructed for the studied schemes. The influence of pressure and temperature in the intermediate superheate

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Li, Chaojie, Yanqin Mao, Xiaoyue Wang, Zhixing Zhan, and Liang Cai. "Numerical Simulation of Internal Flow Field in Turbo-Expander." Journal of Physics: Conference Series 2137, no. 1 (2021): 012073. http://dx.doi.org/10.1088/1742-6596/2137/1/012073.

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Abstract As everyone pays more attention to energy consumption, it is very meaningful to use natural gas pressure energy for power generation and turbo-expander is an important part of power generation devices. In this paper, the turbo-expander model for pressure energy generation is meshed and numerically simulated based on fluent, and the pressure distribution and velocity distribution in the turbo-expander are obtained. The volute profile is Archimedes spiral, and the impeller is modeled by cfturbo. The main conclusions are as follows: when the number of grids is more than 2.2 million, the

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Li, Yao, Jin Tang Yang, Xiao Liang Zhang, Gong Fa Li, and Jin Hui Wang. "Intelligent Control of Turbo-Expander System." Advanced Materials Research 129-131 (August 2010): 400–405. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.400.

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Expander is undertaking the important task to offer essential cold to the air separation course, that the cold produced to make air liquefy, compensate cold loss of the whole separation process. In order to guarantee the operation of the expander system safe and reliable, through analyzing to this system, adopting DCS system to configuration control, make the control of expander system simpler and more convenient, more ocular, and effective, it has certain reference function to other equipment’s control of the air separation.

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Zellner, B., W. Sterr, and O. Herrmann. "Integration of Turbo-Expander and Turbo-Ramjet Engines in Hypersonic Vehicles." Journal of Engineering for Gas Turbines and Power 116, no. 1 (1994): 90–97. http://dx.doi.org/10.1115/1.2906815.

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Turbo-expander-ramjet and turbo-ramjet are two engine concepts considered for hypersonic aircraft designs with a flight regime between Mach 0 and 7. To establish any performance or integration aspects for these two combined-cycle engine types, an extended study of a variety of influence parameters is necessary, because the interaction between aircraft and propulsion system is even stronger than on conventional aircraft. In fact, the propulsion system is very sensitive to intake and nozzle/afterbody design at these high speeds. This paper presents the engine configurations chosen for comparison

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Galerkin, Y. B., A. F. Rekstin, O. A. Solovyeva, A. A. Drozdov, and V. B. Semenovskiy. "Statistical Mathematical Model for Calculating the Efficiency of Turbo-Expander Compressors: Improvement and Identification." Proceedings of Higher Educational Institutions. Маchine Building, no. 7 (748) (July 2022): 68–81. http://dx.doi.org/10.18698/0536-1044-2022-7-68-81.

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Despite their small size turbo expander units used for transportation and processing oil and gas have a capacity of up to 5.5 MW. Designing new turbo-expander units includes several stages, one of which is the variant calculation of the compressor for the given parameters. For calculating the efficiency of the compressor by its main parameters a specialized statistical model is used. The efficiency of stages designed according to a single unambiguous methodology depends on the design parameters and similarity criteria. The generalization of experience in designing turbo-expander units allowed

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