Log in

Relevant bibliographies by topics / Compression of gas / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Compression of gas.

Dissertations / Theses on the topic 'Compression of gas'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Compression of gas.'

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 dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Amundsen, Siren Carstens. "Wet Gas Compression : Impeller Rig." Thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9976.

Full text

Abstract:

<p>Wet gas compression technology is of great value to the oil and gas industry for boosting of unprocessed well stream and to reduce investment costs related to equipment and personnel. The growing interest in wet gas compression leads to a general request for accurate performance calculation procedures and proper measurement techniques for multiphase flow metering in compressors. An impeller rig for examination of single-phase and multiphase performance and aerodynamic stability is under construction at the test facility at NTNU. The construction of the compressor rig is behind time due to

APA, Harvard, Vancouver, ISO, and other styles

2

Khan, Jobaidur Rahman. "Fog Cooling, Wet Compression and Droplet Dynamics In Gas Turbine Compressors." ScholarWorks@UNO, 2009. http://scholarworks.uno.edu/td/908.

Full text

Abstract:

During hot days, gas turbine power output deteriorates significantly. Among various means to augment gas turbine output, inlet air fog cooling is considered as the simplest and most costeffective method. During fog cooling, water is atomized to micro-scaled droplets and introduced into the inlet airflow. In addition to cooling the inlet air, overspray can further enhance output power by intercooling the compressor. However, there are concerns that the water droplets might damage the compressor blades and increased mass might cause potential compressor operation instability due to reduced

APA, Harvard, Vancouver, ISO, and other styles

3

Chan, Evan. "Wet-gas compression in twin-screw multiphase pumps." Thesis, [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1178.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Kornhauser, Alan Abram. "Gas-wall heat transfer during compression and expansion." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14444.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Brzeski, Ian. "Gas-assisted compression moulding of glass reinforced polypropylene." Thesis, University of Warwick, 2009. http://wrap.warwick.ac.uk/3627/.

Full text

Abstract:

A new process of combining gas injection with compression moulding was developed and studied in this research work. The process is called Gas Assisted Compression Moulding (or GasComp). The principle is based on the injection of nitrogen gas during a conventional compression moulding cycle. The flow of the material due to the compressive force of the press is assisted by the injection of gas into the centre of the molten material. The gas assists in the flow by coring out the material, reducing the weight by up to 45 percent and increasing the dimensional stability of the component. Novel glas

APA, Harvard, Vancouver, ISO, and other styles

6

Peucheret, Steven. "Exhaust gas reforming of natural gas to aid homogeneous charge compression ignition engine combustion." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420510.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Xu, Jian. "Modeling of wet gas compression in twin-screw multiphase pump." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2808.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Wong, Lak Kin. "Computational Fluid Dynamics Analysis on the Liquid Piston Gas Compression." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/1104.

Full text

Abstract:

"Liquid piston gas compression utilizes a liquid to directly compress gas. The benefit of this approach is that liquid can conform to irregular compression chamber volume. The compression chamber is divided into many small little bores in order to increases the surface area to volume ratio. The heat transfer rate increases with increasing surface area to volume ratio. However, as the bore diameter becomes smaller, the viscous force increases. In order to maximize the heat transfer rate and to minimize the viscous force, computational fluid dynamics is used. ANSYS Fluent is used to simulate

APA, Harvard, Vancouver, ISO, and other styles

9

White, Timothy Ross Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Simultaneous diesel and natural gas injection for dual-fuelling compression-ignition engines." Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2006. http://handle.unsw.edu.au/1959.4/25233.

Full text

Abstract:

The introduction of alternative fuels such as natural gas is likely to occur at an increasing rate. The dual-fuel concept allows these low cetane number fuels to be used in compression-ignition (CI, diesel) type engines. Most CI engine conversions have pre-mixed the alternative fuel with air in the intake manifold while retaining diesel injection into the cylinder for ignition. The advantage is that it is simple for practical adaptation; the disadvantage is that good substitution levels are only obtained at midload. A better solution is to inject both the alternative and diesel fuels directly

APA, Harvard, Vancouver, ISO, and other styles

10

Vettorazzo, Carolina Maia. "Model predictive control of gas compression station in off-shore production platforms." reponame:Repositório Institucional da UFSC, 2016. https://repositorio.ufsc.br/xmlui/handle/123456789/179945.

Full text

Abstract:

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico, Programa de Pós-Graduação em Engenharia de Automação e Sistemas, Florianópolis, 2016.<br>Made available in DSpace on 2017-10-10T04:09:13Z (GMT). No. of bitstreams: 1 348412.pdf: 1522637 bytes, checksum: bfc8477785a30cc5de8726097fb056f2 (MD5) Previous issue date: 2016<br>Uma plataforma off-shore normalmente produz petróleo bruto e gás natural. O gás é tratado para a remoção da humidade e sua pressão e sua temperatura são modificadas de acordo com sua aplicação final. Parte do gás é direcionado para a linha de

APA, Harvard, Vancouver, ISO, and other styles

11

Aziz, Saduman. "Perfect Gas Navier-stokes Solutions Of Hypersonic Boundary Layer And Compression Corner Flows." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12606661/index.pdf.

Full text

Abstract:

The purpose of this thesis is to perform numerical solutions of hypersonic, high temperature, perfect gas flows over various geometries. Three dimensional, thin layer, compressible, Navier-Stokes equations are solved. An upwind finite difference approach with Lower Upper-Alternating Direction Implicit (LU-ADI) decomposition is used. Solutions of laminar, hypersonic, high temperature, perfect gas flows over flat plate and compression corners (qw=5&deg<br>, 10&deg<br>, 14&deg<br>, 15&deg<br>, 16&deg<br>, 18&deg<br>and 24&deg<br>) with eight different free-stream and wall conditions are presente

APA, Harvard, Vancouver, ISO, and other styles

12

Smith, Benjamin D. "Sweeping gas membrane evaporative cooling for the enhanced performance of vapour compression refrigeration." Thesis, University of Ottawa (Canada), 2010. http://hdl.handle.net/10393/28809.

Full text

Abstract:

A sweeping gas membrane evaporative (SGME) cooling system was developed to remove heat from the condenser of a vapour compression chiller. The chiller was designed for hot environments and could only achieve a coefficient of performance (COP) of 1.0 using an air-cooled condenser. In this work, the condenser was modified to have circulating water absorb heat, which was then cooled in membrane modules by evaporation across a hydrophobic membrane into an air stream. Steady-state operation of the chiller was achieved with the SGME system. Increasing either air flow or water circulation rate increa

APA, Harvard, Vancouver, ISO, and other styles

13

Birger, Nicholas Joseph. "Flow characteristics of gas-blast fuel injectors for direct-injection compression-ignition engines." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/25752.

Full text

Abstract:

Natural gas has a high auto-ignition temperature, therefore natural gas engines use an ignition source to promote combustion. The high-pressure direction-injection (HPDI) systems available use small diesel injections prior to the main gas injection. A new series of HPDI injectors have been developed that inject diesel and gas simultaneously through the same holes. In order to understand and control injection and combustion behavior in an engine, it is essential to understand how injection mass is related to the diesel/gas ratio and injection command parameters. Three prototype injectors are ex

APA, Harvard, Vancouver, ISO, and other styles

14

Budinis, Sara. "Control and operation of centrifugal gas compressors, with an emphasis on CO2 compression." Thesis, Imperial College London, 2015. http://hdl.handle.net/10044/1/55458.

Full text

Abstract:

The PhD project focuses on operation and control of centrifugal gas compressors for carbon dioxide application. The analysis of the industrial background and the review of the academic literature have highlighted some research needs consisting in: - Improvement of the performance of the pressure controller of the compressor - Integration of pressure and surge control - Analysis of the effect of the recycle configuration on the operation of the compressor. Control configurations have been proposed in order to: - Reduce the interaction between control loops - Guarantee the stable and safe operat

APA, Harvard, Vancouver, ISO, and other styles

15

Nyong, Oku. "Development of a rapid compression machine for screening alternative fuel for gas turbines." Thesis, University of Sheffield, 2017. http://etheses.whiterose.ac.uk/17855/.

Full text

Abstract:

The reduction of NOx, soot and other emissions in aero or industrial gas turbines are engage by the concept of new combustion system such as the lean premixed pre-vaporized system. Which brings with it several engineering solutions such as combustion instabilities, flashback and autoignition. An experimental test rig named Sheffield Rapid Compression Machine (Shef-RCM) is designed to investigate the autoignition chemistry of alternative fuels relevant to gas turbine plant and to handle high boiling point long chain hydrocarbon fuels. The Shef-RCM incorporates a hydraulic stopping mechanism, pi

APA, Harvard, Vancouver, ISO, and other styles

16

Pikul, Marina, and Volodymyr Otroshchenko. "Analysis of the efficiency of a gas turbine unit with two-stage compression." Thesis, National aviation university, 2021. https://er.nau.edu.ua/handle/NAU/52790.

Full text

Abstract:

1. Теория авиационных газотурбинных двигателей / Ю.М. Терещенко, Л.Г. Волянская, Н.С. Кулик, В.В. Панин - К.: Книжкове вид-во НАУ, 2005. – 500 c. 2. Моляков В.Д., Осипов М.И., Тумашев Р.З. Повышение эффективности режимов работы газотурбинного двигателя // Вестник МГТУ им. Н.Э. Баумана. Сер. Машиностроение. 2006. № 3. С. 80-95.<br>A promising direction in the development of the power engineering is the use of energy-saving technologies based on gas turbine units, which can significantly increase the efficiency of using fossil fuel. In a number of cases, the operation of a gas turbine unit is c

APA, Harvard, Vancouver, ISO, and other styles

17

Grannan, Nicholas D. "Design and Structural Analysis of a Dual Compression Rotor." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1366644139.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Boyer, Keith M. "An Improved Streamline Curvature Approach for Off-Design Analysis of Transonic Compression Systems." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/27507.

Full text

Abstract:

A streamline curvature (SLC) throughflow numerical model was assessed and modified to better approximate the flow fields of highly transonic fans typical of military fighter applications. Specifically, improvements in total pressure loss modeling were implemented to ensure accurate and reliable off-design performance prediction. The assessment was made relative to the modeling of key transonic flow field phenomena, and provided the basis for improvements, central to which was the incorporation of a physics-based shock loss model. The new model accounts for shock geometry changes, with shoc

APA, Harvard, Vancouver, ISO, and other styles

19

Laforet, Christopher A. "Combustion of natural gas with entrained diesel in a heavy-duty compression-ignition engine." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/17010.

Full text

Abstract:

High-pressure direct-injection of natural gas for use in compression-ignition engines has been found to reduce emissions without sacrificing performance relative to pure diesel operation. In the present work, prototype ‘co-injectors’ which inject a diesel and natural gas mixture from a single injector were tested in a heavy-duty, 6-cylinder Cummins ISX engine with 5 cylinders disabled. One prototype (‘B’) was tested under low-speed, low-load conditions, to determine the effects of fuel flows and in-cylinder conditions on the combustion characteristics of co-injection. Co-injector B, and a s

APA, Harvard, Vancouver, ISO, and other styles

20

Mabson, Christopher William John. "Emissions characterization of paired gaseous jets in a pilot-ignited natural-gas compression-ignition engine." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52188.

Full text

Abstract:

Heavy-duty engines must meet strict emission standards and retain high fuel efficiency. This thesis examines a new type of fuel injector nozzle for a pilot-ignited direct-injection natural gas engine. The nozzle uses paired jets that increase mixing with air during combustion, which aims to reduce the amount of particulate matter (PM) formed. Tests were performed for different speeds and loads and over engine parameter sweeps (including timing, EGR, EQR, and diesel pilot mass) to compare the effects on the emissions to a single-hole nozzle. Low-PM strategies and morphology of the soot were com

APA, Harvard, Vancouver, ISO, and other styles

21

Brown, Benjamin Scott. "High-pressure direct-injection of natural gas with entrained diesel into a compression-ignition engine." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5155.

Full text

Abstract:

The high-pressure direct-injection (HPDI) of natural gas in a compression ignition engine has the potential to reduce demand for petroleum derived fuels and significantly reduce the level of pollutants and greenhouse gases emitted from heavy duty transport vehicles. A new HPDI injector was tested where diesel is injected into a gas/diesel reservoir in the injector and the diesel and gas are then co-injected into the combustion chamber. In order to identify interactions between the diesel and gas in the reservoir, two different injector geometries were tested: prototypes A and B. Prototype B ha

APA, Harvard, Vancouver, ISO, and other styles

22

Davis, Milton W. "A stage-by-stage post-stall compression system modeling technique: methodology, validation, and application." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/50002.

Full text

Abstract:

A one-dimensional, stage-by-stage axial compression system mathematical model has been constructed which can describe system behavior during post-stall events such as surge and rotating stall. The model uses a numerical technique to solve the nonlinear conservation equations of mass, momentum, and energy. Inputs for blade forces and shaft work are provided by a set of quasi-steady stage characteristics modified by a first order lagging equation to simulate dynamic stage characteristics. The model was validated with experimental results for a three-stage, low-speed compressor and a nine-stag

APA, Harvard, Vancouver, ISO, and other styles

23

Davis, Milton W. Jr. "A stage-by-stage post-stall compression system modeling technique: methodology, validation, and application." Diss., Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/50002.

Full text

Abstract:

A one-dimensional, stage-by-stage axial compression system mathematical model has been constructed which can describe system behavior during post-stall events such as surge and rotating stall. The model uses a numerical technique to solve the nonlinear conservation equations of mass, momentum, and energy. Inputs for blade forces and shaft work are provided by a set of quasi-steady stage characteristics modified by a first order lagging equation to simulate dynamic stage characteristics. The model was validated with experimental results for a three-stage, low-speed compressor and a nine-stag

APA, Harvard, Vancouver, ISO, and other styles

24

Song, Ju Ho. "Design, analyses and experimental study of a foil gas bearing with compression springs as a compliance support." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1825.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Mingozzi, Alessandro. "Analisi dello stato dell'arte della tecnologia ORC per applicazione in stazioni di compressione del gas naturale." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

Find full text

Abstract:

Lo studio di questa tesi si propone di mostrare e dare una panoramica generale in merito a una attività in grande espansione come la tecnologia ORC. in un particolare settore come quello del Oil&Gas per il trasporto di gas naturale in tutto il mondo, secondo quanto riportato da autori nei loro articoli scientifici. Da decenni si è notato la possibile convenienza di inserimento di un ciclo ORC in stazioni di compressione che rimangono punti nevralgici nelle infrastrutture per il trasporto di gas naturale tramite condotte nei vari paesi. La tecnologia del ciclo Rankine con fluido organico è in f

APA, Harvard, Vancouver, ISO, and other styles

26

Marvel, Brandon Thomas. "UNCERTAINTY ANALYSIS OF NET HEAT RELEASE RATE PREDICTIONS IN A SINGLE CYLINDER PILOT COMPRESSION IGNITED NATURAL GAS ENGINE." MSSTATE, 2008. http://sun.library.msstate.edu/ETD-db/theses/available/etd-10262008-122335/.

Full text

Abstract:

A zero dimensional single zone model was developed to determine the crank resoled heat release rate at various injection timings (15°-60° BTDC) and the associated uncertainties from a pilot ignited natural gas engine. The uncertainty analysis examines the percentage contribution from various sources of error, including cylinder pressure measurements, intake manifold pressure measurements, and the impact of assumptions such as constant versus temperature dependent specific heat ratios. In particular, uncertainty percentage contributions and uncertainty magnification factors were used to quantif

APA, Harvard, Vancouver, ISO, and other styles

27

Ghomashi, Hossein. "Modelling the combustion in a dual fuel HCCI engine : investigation of knock, compression ratio, equivalence ratio and timing in a Homogeneous Charge Compression Ignition (HCCI) engine with natural gas and diesel fuels using modelling and simulation." Thesis, University of Bradford, 2013. http://hdl.handle.net/10454/7344.

Full text

Abstract:

This thesis is about modelling of the combustion and emissions of dual fuel HCCI engines for design of “engine combustion system”. For modelling the combustion first the laminar flamelet model and a hybrid Lagrangian / Eulerian method are developed and implemented to provide a framework for incorporating detailed chemical kinetics. This model can be applied to an engine for the validation of the chemical kinetic mechanism. The chemical kinetics, reaction rates and their equations lead to a certain formula for which the coefficients can be obtained from different sources, such as NASA polynomia

APA, Harvard, Vancouver, ISO, and other styles

28

Mingaleeva, Renata. "Wind turbines application for energy savings in Gas transportation system." Thesis, KTH, Kraft- och värmeteknologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149260.

Full text

Abstract:

The Thesis shows the perspectives of involving renewable energy resources into the energy balance of Russia, namely the use of wind energy for the purpose of energy supply for the objects of the Russian Gas transportation system. The methodology of the wind energy technical potential calculation is designed and the wind energy technical potential assessment for onshore and offshore zones of Russia is presented. The analysis of Russian Gas transportation system in terms of energy consumption is carried out when comparing the map of wind resources in Russia with the map of Russian Gas transporta

APA, Harvard, Vancouver, ISO, and other styles

29

Newton, Barry Edward. "Thermal profile of a near-adiabatic compression process in a cylindrical tube and establishment of critical control elements for repeatable process control." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/48340/1/Barry_Newton_Thesis.pdf.

Full text

Abstract:

The compressed gas industry and government agencies worldwide utilize "adiabatic compression" testing for qualifying high-pressure valves, regulators, and other related flow control equipment for gaseous oxygen service. This test methodology is known by various terms including adiabatic compression testing, gaseous fluid impact testing, pneumatic impact testing, and BAM testing as the most common terms. The test methodology will be described in greater detail throughout this document but in summary it consists of pressurizing a test article (valve, regulator, etc.) with gaseous oxygen within 1

APA, Harvard, Vancouver, ISO, and other styles

30

Luo, Xiaobo. "Process modelling, simulation and optimisation of natural gas combined cycle power plant integrated with carbon capture, compression and transport." Thesis, University of Hull, 2016. http://hydra.hull.ac.uk/resources/hull:14005.

Full text

Abstract:

Reducing CO₂ emissions from fossil fuel-fired power plants is a significant challenge, technically and economically. Post-combustion carbon capture (PCC) using amine solvents is widely regarded as the most promising technology that can be commercially deployed for carbon capture from fossil fuel-fired power plants. However, for its application at full commercial scale, the main barrier is high cost increment of the electricity due to high capital costs and significant energy penalty. This thesis presents the studies on optimal design and operation of Monoethanolamine (MEA)-based PCC process an

APA, Harvard, Vancouver, ISO, and other styles

31

Wong, Yan K. "An analytical examination of the autoignition process in gas fueled compression-ignition engines in the presence of recycled exhaust products." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0023/NQ49550.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Fink, Georg [Verfasser]. "Experimental Investigation of Ignition and Combustion of Diesel-Piloted Natural Gas Jets in a Rapid Compression-Expansion Machine / Georg Fink." München : Verlag Dr. Hut, 2021. http://d-nb.info/1240540191/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Cambridge, Shevonn Nathaniel. "The effect of compression ratio on emissions from an alcohol-fueled engine." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09122009-040220/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Schopf, Sven O. [Verfasser]. "Highly porous nanoparticle layers from the gas phase – Stabilization through mechanical compression to withstand capillary forces during imbibition / Sven O. Schopf." Aachen : Shaker, 2018. http://d-nb.info/1186590459/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Huang, Quanzhen. "THERMAL DEGRADATION OF AMINES FOR CO₂ CAPTURE." UKnowledge, 2015. http://uknowledge.uky.edu/chemistry_etds/51.

Full text

Abstract:

In the selection of candidates for CO2 absorption, solvent thermal degradation has become a general concern due to the significant impact on operational cost and the intention to use thermal compression from high temperature stripping to minimize the overall process energy. In this research, the impact of flue gas contaminants on Monoethanolamine (MEA) thermal degradation was investigated at elevated temperatures consistent with those in the CO2 stripper. Nitrite, fly ash, sulfate and thiosulfate were each added to 5.0 M MEA and the contaminant-containing MEA solutions were degraded at 125 °C,

APA, Harvard, Vancouver, ISO, and other styles

36

Christodoulou, Fanos. "Hydrogen, nitrogen and syngas enriched diesel combustion." Thesis, Brunel University, 2014. http://bura.brunel.ac.uk/handle/2438/9109.

Full text

Abstract:

On-board hydrogen and syngas production is considered as a transition solution from fossil fuel to hydrogen powered vehicles until problems associated with hydrogen infrastructure, distribution and storage are resolved. A hydrogen- or syngas-rich stream, which substitutes part of the main hydrocarbon fuel, can be produced by supplying diesel fuel in a fuel-reforming reactor, integrated within the exhaust pipe of a diesel engine. The primary aim of this project was to investigate the effects of intake air enrichment with product gas on the performance, combustion and emissions of a diesel engin

APA, Harvard, Vancouver, ISO, and other styles

37

Курдес, Ю. Ю., Сергій Сергійович Некрасов, Сергей Сергеевич Некрасов та Serhii Serhiiovych Nekrasov. "Механическое устройство для повышения давления жидкости". Thesis, Сумский государственный университет, 2015. http://essuir.sumdu.edu.ua/handle/123456789/39821.

Full text

Abstract:

Создание давления в аппарате – наиболее трудоемкий этап процесса при высоких давлениях. Наиболее трудоемкий процесс – это сжатие газа, поскольку газы легче всего вытекают через движущиеся уплотнения и обладают (при давлениях до 7000 – 8000 атм) самой большой сжимаемостью. Предельное давление до которого можно сжать газ, определяется кривой его плавления. При обычных температурах газы затвердевают уже при давлении 10000 – 15000 атм, поэтому, чтобы сжать газ до более высокого давления его необходимо нагревать.

APA, Harvard, Vancouver, ISO, and other styles

38

Messedi, Nouri. "Contribution à l'étude du comportement d'un moteur à taux de compression variable alimenté au méthane." Valenciennes, 1986. https://ged.uphf.fr/nuxeo/site/esupversions/0f357994-0e2f-428c-be57-1551bb305d52.

Full text

Abstract:

Une partie expérimentale étudie l'influence de la richesse du mélange carburant et des paramètres de fonctionnement d'un moteur monocylindre, quatre temps sur la combustion et les conditions d'apparition du cliquetis en faisant une comparaison méthane/super carburant. Cette étude est complétée par le développement d'un programme de calcul du cycle théorique qui permet de déterminer les pressions et températures ainsi que l'évolution des produits de combustion au cours du cycle.

APA, Harvard, Vancouver, ISO, and other styles

39

Mallardeau, Catherine. "L'hydrogène atomique polarisé : interaction avec les films d'Helium : expérience de compression." Paris 6, 1986. http://www.theses.fr/1986PA066186.

Full text

Abstract:

Etude expérimentale de certains mécanismes de recombinaison de H| afin de comprendre les limites à l'obtention de la condensation de Bose Einstein. Mesure de l'énergie d'adsorption de H sur une couche mince 4He en fonction de l'épaisseur de la couche, paramètre qui donne les limites de stabilisation de H à basse température; obtention de la stabilisation sur des couches biomoléculaires. Construction d'un dispositif expérimental pour comprimer le gaz H| en champ magnétique de 20t, pour étudier le taux de recombinaison à 3 corps de H à haute densité et en champ magnétique intense.

APA, Harvard, Vancouver, ISO, and other styles

40

Khaddour, Fadi. "Amélioration de la production de gaz des « Tight Gas Reservoirs »." Thesis, Pau, 2014. http://www.theses.fr/2014PAUU3005/document.

Full text

Abstract:

La valorisation des réservoirs gaziers compacts, dits Tight Gas Reservoirs (TGR), dont les découvertes sont importantes, permettrait d’augmenter significativement les ressources mondiales d’hydrocarbures. Dans l’objectif d’améliorer la production de ces types de réservoirs, nous avons mené une étude ayant pour but de parvenir à une meilleure compréhension de la relation entre l’endommagement et les propriétés de transport des géomatériaux. L’évolution de la microstructure d’éprouvettes qui ont été soumises préalablement à des chargements dynamiques est étudiée. Une estimation de leurs perméabi

APA, Harvard, Vancouver, ISO, and other styles

41

Abuhabaya, Abdullah. "Investigation of engine performance and exhaust gas emissions by using bio-diesel in compression ignition engine and optimisation of bio-diesel production from feedstock by using response surface methodology." Thesis, University of Huddersfield, 2012. http://eprints.hud.ac.uk/id/eprint/14064/.

Full text

Abstract:

Bio-diesel, derived from the transesterification of vegetable oils or animal fats with simple alcohols, has attracted more and more attention recently. As a cleaner burning diesel alternative, bio-diesel claims to have many attractive features including: biodegradability, nontoxicity, renewability and low emission profiles. Free fatty acid (FFA) esterification and triglyceride (TG) transesterification with low alcohols molar ratio are the central reactions for the bio-diesel production. This study presents an experimental investigation into the effects of running biodiesel fuel and its blends

APA, Harvard, Vancouver, ISO, and other styles

42

Чучук, Ю. В. "Економічне оцінювання ефективності газоперекачувальних агрегатів у процесі транспортування природного газу". Thesis, Івано-Франківський національний технічний університет нафти і газу, 2015. http://elar.nung.edu.ua/handle/123456789/4772.

Full text

Abstract:

Дисертаційна робота присвячена розвитку науково обґрунтованих теоретичних положень та формує практичні рекомендації щодо оцінювання ефективності використання електропривідних та газотурбінних агрегатів для перекачування газу магістральними газопроводами. Обґрунтовано доцільність застосування показника «собівартість 1 години роботи газоперекачувального агрегату» при проведенні оцінки ефективності використання газоперекачувальних агрегатів. Запропоновано використовувати «коефіцієнт стимулювання економіки», який враховуватиме ступінь виробництва та/або обслуговування газоперекачувальних агрегатів

APA, Harvard, Vancouver, ISO, and other styles

43

Machrafi, Hatim. "Développement et validation expérimentale de schémas cinétiques pour des mélanges d'hydrocarbures pour une combustion HCCI : étude du processus d'auto-inflammation et application au moteur à combustion interne." Paris 6, 2007. http://www.theses.fr/2007PA066040.

Full text

Abstract:

Une des solutions très prometteuses pour la réduction des émissions polluantes et de la consommation des moteurs à combustion interne est la mise en place de combustions alternatives pour une optimisation à la source. En particulier, de nombreuses études sont menées autour du développement d’une combustion en charge homogène par auto inflammation appelée « Homogeneous Charged Compression Ignition ». Cependant, le contrôle de ce mode de combustion nécessite une recherche avancée incluant une approche interdisciplinaire associant la chimie, la mécanique des fluides et les contraintes d’un foncti

APA, Harvard, Vancouver, ISO, and other styles

44

Owren, Bjørn Berge. "Wet Gas Compressor Transients." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-26330.

Full text

Abstract:

This master thesis considers three subtasks related to transient operation of wet gas compressors.HYSYS Dynamics is used to establish a dynamic simulation model in the first subtask. The model is designed to predict transient behavior of the compressor test facility at NTNU during dry and wet gas trip scenarios. Its steady state performance has been validated against test data. The deviation of polytropic head and suction volume flow is less than 1% for all test points but one.Dry and wet gas model performance during trip is validated in the second subtask. The deviation is evaluated in terms

APA, Harvard, Vancouver, ISO, and other styles

45

Jellum, Marie Rennemo. "Wet Gas Compressor Surge Detection." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for elkraftteknikk, 2013. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-22355.

Full text

Abstract:

The development of wet gas compressors for installation subsea is key to increase the recovery of oil and gas from the Norwegian Continental Shelf. Safe operation of the compressor depends on understanding of how wet gas affects the behavior of the machine. The compressor operating range is limited by stall and surge, and it is therefore particularly important to determine how liquid will affect the inception of these phenomena. Measuring pressure transients within the compressor or in the inlet and discharge pipe are widely used in experimental investigation of stall and surge. Spectral analy

APA, Harvard, Vancouver, ISO, and other styles

46

Li, Yongqiang. "Experimental Studies on the Mechanical Durability of Proton Exchange Membranes." Diss., Virginia Tech, 2008. http://hdl.handle.net/10919/29944.

Full text

Abstract:

Three testing methods are proposed to characterize properties of fuel cell materials that affect the mechanical durability of proton exchange membranes (PEMs). The first two methods involved measuring the in-plane biaxial strength of PEMs and the biaxial hygrothermal stresses that occur in PEMs during hygrothermal cycles. The third method investigated the nonuniform thickness and compressibility of gas diffusion media which can lead to concentrated compressive stresses in the PEM in the through-plane direction. Fatigue and creep to leak tests using multi-cell pressure-loaded blister fixtur

APA, Harvard, Vancouver, ISO, and other styles

47

Rofiqi, Zaenuddin Ar. "Review of Wet Gas Compressor Performance." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2014. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25545.

Full text

Abstract:

Subsea wet gas compression without preliminary separation give an opportunity to develop mature and remote gas/condensate field. Predicting wet gas compressor performance is important to develop those fields. Currently there is no standard exist for wet gas compression performance calculation (Hundseid et al., 2008). The current standards (ISO 5389:2005) exist only for dry gas by utilizing Schultz method. In wet gas compression, fluid properties are changing as fluid being compressed. Schultz method may not be accurate to be applied in wet gas compression since it uses average fluid propertie

APA, Harvard, Vancouver, ISO, and other styles

48

Lagorce-Tachon, Aurélie. "Propriétés mécaniques, structure interne et mécanismes de transfert de l'oxygène dans le liège." Thesis, Dijon, 2015. http://www.theses.fr/2015DIJOS073/document.

Full text

Abstract:

Lors de la conservation des vins en bouteilles, des réactions d’oxydation prématurées peuvent se produire et les propriétés barrières à l’oxygène de l’obturateur en liège sont souvent mises en cause. À l’heure actuelle, aucune étude n’a permis de déterminer la structure interne du liège ou l’effet de l’hydratation sur ses propriétés mécaniques. Quant aux propriétés barrières à l’oxygène, l’étape limitante au transfert reste indéterminée ainsi que l’effet de la compression et le rôle de l’interface verre/liège. L’étude de la structure interne du liège par imagerie a permis de visualiser la macr

APA, Harvard, Vancouver, ISO, and other styles

49

Holík, Petr. "Úcpávky turbodmychadel." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230162.

Full text

Abstract:

This master’s thesis deals with theme of turbocharger seals. The aims of a thesis are to compare a turbocharger seals used in PBS Turbo turbochargers and to describe a testing of a seals. Principle of turbocharging and types of turbocharger are described in fist part. Next point of the thesis is describing of a face seals and non-contacting seals. The main part of the thesis describes kinds and reasons of seals testing; also contains comparison between labyrinth seals and piston ring, comparison of seals of PBS Turbo’s turbochargers and assesses the impact of turbocharger angle on the tightnes

APA, Harvard, Vancouver, ISO, and other styles

50

Mele, Erik. "Wet Gas Compressor Performance : A Numerical Investigation of Thermal-Equilibrium in a Centrifugal Compressor Exposed to Wet Gas." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18533.

Full text

Abstract:

Wet gas compression and subsea compression technology has gained increased focus in the recent years. With aging fields on the Norwegian continental shelf and new discoveries in arctic regions, subsea compression could boost aging gas fields and make remote fields profitable where extraction is difficult. Wet-gas compression could reduce the need for expensive scrubbers and separators and this would be a major economic enhancement to subsea processing. There is currently no standard for wet gas compression as the ASME PTC 10 [1] offers no guidance on this. The complex phenomena encountered in

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!