scholarly journals Study on nitrogen barrier protection of an airend oil-free compressor bearings in H2 compression

2022 ◽  
Vol 354 ◽  
pp. 00047
Author(s):  
Iulian Vladuca ◽  
Emilia Georgiana Prisăcariu ◽  
Cosmin Petru Suciu ◽  
Cristian Dobromirescu ◽  
Răzvan Edmond Nicoară
Keyword(s):  
Natural Gas ◽  
Gas Turbines ◽  
Point Of View ◽  
Working Pressure ◽  
Gas Field ◽  
Gas Network ◽  
Gas Compression ◽  
Air Compression ◽  
Oil Injection ◽  
Injection Screw

The oil free compressors were specially designed for air compression. The National Research and Development Institute for Gas Turbines COMOTI gained a great deal of experience in producing/designing certified oil injection screw compressors for the natural gas field and for several years it has been focusing its research on the use of “dry” (oil-free) compressors in natural gas compression and more recently in hydrogen compression. Working with an explosive gas, one of an idea was to use a nitrogen barrier in oil bearing sealing, which are open source of gases in the atmosphere for such compressors. Worldwide, on-site nitrogen generators have been developed for a purity range of 95…99.5%, and that nitrogen can be supplied in any environment conditions. The present paper will address nitrogen flow with low percentage of oxygen for bearing sealing at the working pressure, the nitrogen consumption, ideas for H2 re-injection and the influence over the global efficiency of the process. Due to the Energy Strategy worldwide, and the studies regarding production, transport and storage of hydrogen in natural gas network, COMOTI has involved researches in developing such possibilities and to express a point of view in existing research in the newly created industry.

Efficient Smoke Suppressant Reduces the Particulate Matter Emissions of Crude Oil Fired Gas Turbines

2019 ◽  
Author(s):  
Matthieu Vierling ◽  
Michel Moliere ◽  
Paul Glaser ◽  
Richard Denolle ◽  
Sathya Nayani ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Natural Gas ◽  
Crude Oil ◽  
Gas Turbines ◽  
Oil And Gas ◽  
Liquid Fuels ◽  
Gas Field ◽  
Associated Gas ◽  
Score Card ◽  
Particulate Matter Emissions

Abstract Gas turbines are often the master pieces of the utilities that power Oil and Gas (O&G) installations as they most often operate in off-grid mode and must reliably deliver the electric power and the steam streams required by all the Exploration/Production (EP) or refining processes. In addition to reliability, fuel flexibility is an important score card of gas turbines since they must permanently accommodate the type of fuel which is available on the particular O&G site. For instance, during the operation of an associated gas field, crude oil comes out from the well heads as the gas reserves are declining or depleted. The utility gas turbine must then be capable to successively burn natural gas and crude oil and often to co-fire both fuels. An important feature of crude oils is that their combustion tends to emit significantly more particulate matter (PM) than do distillate oil and natural gas as they contain some heavier hydrocarbon ends. Taking account of the fact that some alternative liquid fuels emit more particulates matter (PM) than distillate oils, GE has investigated a class of soot suppressant additives that have been previously tested on light distillate oil (No 2 DO). As a continuation of this development, these products have been field-tested at an important refining site where several Frame 6B gas turbines have been converted from natural gas to crude oil with some units running in cofiring mode. This field test showed that proper injections of these fuel additives, at quite moderate concentration levels, enable a substantial abatement of the PM emissions and reduction of flue gas opacity. This paper outlines the main outcomes of this field campaign and consolidates the overall results obtained with this smoke suppression technology.

Study on Desulfurization and Decarbonization Technology of Natural Gas on Bohai Offshore Platform

2019 ◽  
Author(s):  
Ping Lu ◽  
Zhaoguang Qu ◽  
Guoqiang Gao ◽  
Yan Huang ◽  
Xin Qian ◽  
...  
Keyword(s):  
Natural Gas ◽  
Gas Turbines ◽  
Reference Value ◽  
Offshore Platform ◽  
Gas Field ◽  
Advantages And Disadvantages ◽  
Process Characteristics ◽  
Technical Programs ◽  
Temperature Separation ◽  
Natural Gas Desulfurization

Abstract Based on the latest developments of desulfurization and decarbonization technologies of acidic natural gas, the process characteristics, product purity, consumptions, occupied area, advantages and disadvantages of various desulfurization and decarbonization methods are analyzed and compared, and the adaptability of the methods on offshore platform is fully considered. According to the actual situation of a Bohai offshore gas field, the low temperature separation method is adopted and the desulfurization and decarbonization process is simulated by using HYSYS software, and then the technical scheme is put forward to meet the requirements of the gas turbines on surrounding platforms and the transportation quality index of the southwest Bohai gas supply pipeline network. This research has a certain reference value for technical programs of natural gas desulfurization and decarbonization on similar offshore projects.

A System for Health State Determination of Natural Gas Compression Gas Turbines

2001 ◽  
Author(s):  
R. Bettocchi ◽  
M. Pinelli ◽  
P. R. Spina ◽  
M. Venturini ◽  
S. Sebastianelli
Keyword(s):  
Natural Gas ◽  
Path Analysis ◽  
Gas Turbines ◽  
Diagnostic System ◽  
Health State ◽  
Compression System ◽  
Gas Compression ◽  
State Determination ◽  
System Maintenance

This paper illustrates the policy and objectives in compression system maintenance and describes a system for the health state determination of natural gas compression gas turbines based on “Gas Path Analysis”. Some results of the application of the diagnostic system to gas turbines working in a natural gas compression plant are presented.

scholarly journals Hybrid Hydrogen–PV–e-Mobility Industrial Energy Community Concept—A Technology Feasibility Study

2021 ◽  
Vol 3 (4) ◽  
pp. 670-684
Author(s):  
Istvan Vokony
Keyword(s):  
Natural Gas ◽  
Gas Turbines ◽  
Renewable Energy Sources ◽  
Hybrid Energy ◽  
Gas Network ◽  
Filling Station ◽  
Industrial Energy ◽  
Low Efficiency ◽  
Energy Community ◽  
Community Concept

As renewable energy sources are spreading, the problems of energy usage, transport and storage arise more frequently. In order that the performance of energy producing units from renewable sources, which have a relatively low efficiency, should not be decreased further, and to promote sustainable energy consumption solutions, a living lab conception was elaborated in this project. At the pilot site, the produced energy (by PV panels, gas turbines/engines) is stored in numerous ways, including hydrogen production. The following uses of hydrogen are explored: (i) feeding it into the national natural gas network; (ii) selling it at a H-CNG (compressed natural gas) filling station; (iii) using it in fuel cells to produce electricity. This article introduces the overall implementation plan, which can serve as a model for the hybrid energy communities to be established in the future.

Ejector Compression of Natural Gas for Small Turbines

1967 ◽  
Vol 182 (1) ◽  
pp. 449-462 ◽  
Author(s):  
G. Walker
Keyword(s):  
Natural Gas ◽  
Combustion Chamber ◽  
Thermal Efficiency ◽  
Gas Turbines ◽  
Cooling Water ◽  
Two Stage ◽  
Steam Consumption ◽  
Steam Content ◽  
Gas Compression ◽  
Steam Ejector

Natural-gas-fuelled total-energy systems for supplying the utility demands of residential and commercial buildings typically require 500 s.h.p. for the machinery drives. Although gas turbines are competitive prime movers in this size range, difficulties arise from the need to compress the natural gas fuel to the pressure of the turbine combustion chamber. In this study the use of non-condensing single-and two-stage steam-jet ejectors was analysed for gas compression to a pressure of 150 lb/in2. Steam-supply conditions from 5000 to 1000 lb/in2 and 800 to 1200°F were considered; methane was supplied at 15 lb/in2 and 60°F. The specific steam consumption (lb steam per lb gas) of a two-stage ejector was found to be much better than that of a single-stage ejector. The minimum specific steam consumption (6 lb steam per lb gas) occurred at the extreme steam conditions considered in the study. The steam-methane mixture this produced was not flammable when mixed in any proportion with air. Of several methods considered to reduce the steam content of the mixture delivered by the ejector, only one, post-ejector cooling and condensate removal, was suitable for analysis. Cooling-water flow rates in excess of 14 lb water per lb gas were necessary to produce potentially flammable mixtures. Estimates were made of the major effects on turbine engine performance arising from the use of a steam ejector for gas compression. A comparison was drawn for two idealized cycles and for two others in which realistic values of component efficiencies were included. In each series the gas was compressed by conventional means in one cycle and by means of a steam-jet ejector in the other. The steam injected with the methane in the turbine combustion chamber caused an appreciable decrease in the cycle temperatures and significant improvement in both the turbine output and thermal efficiency. When the additional heat input necessary to generate the steam for the ejector was included, the overall thermal efficiency of the steam-ejector cycle was less than that of the conventional cycle.

Geopolitics of Energy

2016 ◽  
Vol 3 (1) ◽  
pp. 78
Author(s):  
Blerina Muskaj
Keyword(s):  
Natural Gas ◽  
Qualitative Methodology ◽  
Scientific Literature ◽  
Point Of View ◽  
Energy Market ◽  
Energy Potential ◽  
Environmental Consequences ◽  
Regional Energy ◽  
Political Debates ◽  
Political Weapon

At the beginning of my paper I will explain the concept of "Geopolitics of Energy", this will be done for a quite simple reason, because I want everyone who can sit to read this article to understand more clearly what is at stake, therefore allow them the comprehension of what is being elaborated bellow at first sight. Geopolitics of energy is a concept that relates to policies choosing exporters to implement on importers, is the policy that has an impact on energy consumption, which includes consumer’s choice in the geopolitical context, taking into account the economy, foreign policy, the safety of energy, environmental consequences and priorities that carries the energy exporter. This concept permits the understanding of how works the politics that undertakes this initiative taking into account natural resources such as: natural gas and oil. Natural gas and oil are two main resources that produce energy but also two main elements on which arises all the topic in the energetics game. For this paper is used qualitative methodology, through which we were able to accomplish this work. I focused on scientific literature, official publications and reports on energy geopolitics. The main aim has been to show how in this decade, energy security is at the center of geopolitical agenda and has become the focus of numerous political debates. Regarding this point of view, Europe is taking the initiative to create a common energy market within the continent by creating projects, in which Albania appears as a new regional energy potential. Russia, which is aiming to play a role in the international arena, is seeking to position itself geopolitically in "its political weapon", hydrocarbon resources, in particular natural gas resources.

scholarly journals Investigation of Mixing Behavior of Hydrogen Blended to Natural Gas in Gas Network

2021 ◽  
Vol 13 (8) ◽  
pp. 4255
Author(s):  
Mingmin Kong ◽  
Shuaiming Feng ◽  
Qi Xia ◽  
Chen Chen ◽  
Zhouxin Pan ◽  
...  
Keyword(s):  
Natural Gas ◽  
Torsion Angle ◽  
Carbon Dioxide Emissions ◽  
Pressure Loss ◽  
Optimum Number ◽  
Hydrogen Energy ◽  
Gas Mixing ◽  
Gas Network ◽  
Mixing Performance ◽  
Mixing Behavior

Hydrogen is of great significance for replacing fossil fuels and reducing carbon dioxide emissions. The application of hydrogen mixing with natural gas in gas network transportation not only improves the utilization rate of hydrogen energy, but also reduces the cost of large-scale updating household or commercial appliance. This paper investigates the necessity of a gas mixing device for adding hydrogen to existing natural gas pipelines in the industrial gas network. A three-dimensional helical static mixer model is developed to simulate the mixing behavior of the gas mixture. In addition, the model is validated with experimental results. Parametric studies are performed to investigate the effect of mixer on the mixing performance including the coefficient of variation (COV) and pressure loss. The research results show that, based on the, the optimum number of mixing units is three. The arrangement of the torsion angle of the mixing unit has a greater impact on the COV. When the torsion angle θ = 120°, the COV has a minimum value of 0.66%, and when the torsion angle θ = 60°, the COV has a maximum value of 8.54%. The distance of the mixing unit has little effect on the pressure loss of the mixed gas but has a greater impact on the COV. Consecutive arrangement of the mixing units (Case A) is the best solution. Increasing the distance of the mixing unit is not effective for the gas mixing effect. Last but not least, the gas mixer is optimized to improve the mixing performance.

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