A Study on In-Cylinder Injection of Low Pressure Natural Gas for Performance Improvement of Small Sized Two-Stroke SI Engines

2001 ◽  
Author(s):  
Shiyuji Hatakeyama ◽  
Yoshio Sekiya ◽  
Tadashi Murayama ◽  
Shunsaku Nakai ◽  
Takahiro Sako ◽  
...  
Keyword(s):  
Natural Gas ◽  
Performance Improvement ◽  
Low Pressure ◽  
Si Engines

scholarly journals A Study on In-Cylinder Injection of Low Pressure Natural Gas for Performance Improvement of Small Sized Two-Stroke SI Engines.

2001 ◽  
Vol 67 (660) ◽  
pp. 2145-2150 ◽  
Author(s):  
Shuji HATAKEYAMA ◽  
Tadashi MURAYAMA ◽  
Yoshio SEKIYA ◽  
Shunsaku NAKAI ◽  
Takahiro SAKO ◽  
...  
Keyword(s):  
Natural Gas ◽  
Performance Improvement ◽  
Low Pressure ◽  
Si Engines

Thinking Different Approach to Optimize Your Treaters

2021 ◽  
Author(s):  
Anand Kumar Singh ◽  
Aysha Alobeidli ◽  
Venugopal Bakthavachsalam
Keyword(s):  
Natural Gas ◽  
Best Practices ◽  
Performance Improvement ◽  
Change Process ◽  
Molecular Sieve ◽  
Critical Parameter ◽  
Treatment Process ◽  
Feasibility Studies ◽  
Management Change ◽  
And Performance

Abstract Natural gas coming from the well contains hydrocarbons, CO2, H2S, and water together with many other impurities. Molecular sieve treatment of the gas is required to make it suitable for the various applications. The several process and parameters considerations contribute to the reliable and optimized operation of molecular sieve natural gas treaters. The journey of this molecular sieve treater optimization commenced by conducting a thorough systematic study of all existing treater performance by considering various operating critical parameter. The technical feasibility studies were completed covering all the aspects like evaluating current performance of treater, conducting simulation for future capacity, licensor endorsement, conducting breakthrough test. Finally, study outcomes were implemented through management change process. The main benefits of optimization of molecular sieve treater process are to extend the service life of molecular sieve which enable us to increase the turnaround cycle of NGL trains. Significant reduction in CAPEX and OPEX cost were realized by reducing new fresh molecular sieve procurement, reducing disposal of molecular sieve waste material and expense of shutdown, achieving 100% HSE. This paper presents the typical operation issues and challenges in molecular sieve treatment process, best practices adopted for maximizing of existing assets considering the current and design scenarios, and performance improvement, which result to extend molecular sieve life, increase of NGL shutdown cycle and flaring reduction in trains.

scholarly journals Vapor Recovery from Condensate Storage Tanks Using Gas Ejector Technology

2013 ◽  
Vol 27 ◽  
pp. 37-41
Author(s):  
Palash K Saha ◽  
Mahbubur Rahman
Keyword(s):  
Natural Gas ◽  
Chemical Engineering ◽  
Economic Loss ◽  
Low Pressure ◽  
Heat Energy ◽  
Environmental Concerns ◽  
Storage Tanks ◽  
Gas Field ◽  
Recovery Unit ◽  
Yearly Saving

This paper demonstrates a method of recovering the low pressure vapor from the condensate tanks in the Bibiyana gas field. This method uses a gas ejector as a device to compress the low pressure natural gas from the condensate tanks to an intermediate pressure, which would then be fed into the intermediated stage of the existing vapor recovery unit. Thus the natural gas will be saved which would have been otherwise flared. The amount of tank vapor is estimated by different methods, which shows a significant amount of gas is now being flared. Flaring of gas is a problem which entails both economic loss and environmental concerns. It is estimated that, on the average 190 MSCFD tank vapor can be recovered using the proposed method involving a gas ejector. Thus yearly saving would be about 68 MMSCF of natural gas. The equivalent heat energy saving is about 74.55X109 BTU. In terms of greenhouse gas emissions, this project will reduce about 1,112 tons of CO2 emissions per year in the gas plant locality. DOI: http://dx.doi.org/10.3329/jce.v27i1.15856 Journal of Chemical Engineering, IEB Vol. ChE. 27, No. 1, June 2012: 37-41

scholarly journals Fundamental Study on Combustion Improvement by Mixture-Flow in Natural Gas-Fueled Lean-Burn SI Engines

2000 ◽  
Vol 35 (4) ◽  
pp. 254-259
Author(s):  
Daisuke Segawa ◽  
Toshikazu Kadota ◽  
Masashi Ohno ◽  
Takeshi Mizobuchi ◽  
Katsumi Kataoka ◽  
...  
Keyword(s):  
Natural Gas ◽  
Lean Burn ◽  
Mixture Flow ◽  
Fundamental Study ◽  
Si Engines ◽  
Gas Fueled

Performance improvement of low-pressure cylinder in high back pressure steam turbine for direct heating

2021 ◽  
Vol 182 ◽  
pp. 116170
Author(s):  
Xiaodong Zhao ◽  
Ang Li ◽  
Youjun Zhang ◽  
Liqun Ma ◽  
Zhihua Ge ◽  
...  
Keyword(s):  
Steam Turbine ◽  
Performance Improvement ◽  
Low Pressure ◽  
Back Pressure ◽  
Direct Heating ◽  
Pressure Steam ◽  
Pressure Cylinder

Hydrogen leaks at the same rate as natural gas in typical low-pressure gas infrastructure

2020 ◽  
Vol 45 (15) ◽  
pp. 8810-8826 ◽  
Author(s):  
Alejandra Hormaza Mejia ◽  
Jacob Brouwer ◽  
Michael Mac Kinnon
Keyword(s):  
Natural Gas ◽  
Low Pressure

Development of Knudsen thermal force for mass analysis of CH4/He gas mixture

2019 ◽  
Vol 30 (01) ◽  
pp. 1950002 ◽  
Author(s):  
Mostafa Barzegar Gerdroodbary ◽  
D. D. Ganji ◽  
Mohammad Taeibi-Rahni ◽  
B. Pruiti ◽  
Rasoul Moradi
Keyword(s):  
Natural Gas ◽  
Gas Sensor ◽  
Direct Simulation Monte Carlo ◽  
Low Pressure ◽  
Rectangular Domain ◽  
Gas Mixture ◽  
Micro Gas Sensor ◽  
High Order Equation ◽  
Helium Gas ◽  
Simulation Monte Carlo

Natural gas is known as the main source of energy and also contains significant and noble gases. Numerous researches have been performed to present novel methods for the detection and analysis of natural gas. In this study, Direct Simulation Monte Carlo (DSMC) method is used to evaluate the performance of a new micro gas sensor (MIKRA) for detection of helium in CH4/He gas mixture. In this sensor, the temperature difference of two arms inside a rectangular domain at low-pressure condition induces a Knudsen force which is proportional to physical properties of the gas. In order to define flow feature of a low-pressure gas inside the micro gas actuator, high order equation of Boltzmann is used to attain high precision results. To solve these equations, DSMC approach is used as a robust method for the non-equilibrium flow field. The effects of main factors such as length and gap of arms are comprehensively investigated in different ambient pressures. Furthermore, the effect of various concentrations of the CH4/He gas mixture on force generation is comprehensively studied. Our findings show that value of generated Knudsen force significantly different when the fraction of He in CH4/He gas mixture is varied. This indicates that this micro gas sensor could precisely detect the concentration of Helium gas inside a low-pressure CH4/He gas mixture.

Performance improvement of liquefied natural gas (LNG) engine through intake air supply

2016 ◽  
Vol 103 ◽  
pp. 1351-1361 ◽  
Author(s):  
Qijun Tang ◽  
Jianqin Fu ◽  
Jingping Liu ◽  
Feng Zhou ◽  
Zhipeng Yuan ◽  
...  
Keyword(s):  
Natural Gas ◽  
Performance Improvement ◽  
Liquefied Natural Gas ◽  
Air Supply
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