scholarly journals Simplified Method for Calculation of the Joule-Thomson Coefficient at Natural Gas Flowrate Measurement

2015 ◽  
Vol 1 (2) ◽  
pp. 127-132
Author(s):  
Yevhen Pistun ◽  
Fedir Matiko ◽  
Oleh Masnyak
Keyword(s):  
Natural Gas ◽  
Simplified Method ◽  
Thomson Coefficient

scholarly journals Influences of Hydrogen Blending on the Joule–Thomson Coefficient of Natural Gas

ACS Omega ◽  
2021 ◽  
Author(s):  
Jingfa Li ◽  
Yue Su ◽  
Bo Yu ◽  
Peng Wang ◽  
Dongliang Sun
Keyword(s):  
Natural Gas ◽  
Thomson Coefficient

Prediction of Joule-Thomson coefficient and inversion curve for natural gas and its components using CFD modeling

2020 ◽  
Vol 83 ◽  
pp. 103570
Author(s):  
Sina Nabati Shoghl ◽  
Abbas Naderifar ◽  
Fathollah Farhadi ◽  
Gholamreza Pazuki
Keyword(s):  
Natural Gas ◽  
Cfd Modeling ◽  
Inversion Curve ◽  
And Inversion ◽  
Thomson Coefficient

Determination of the Joule–Thomson coefficient in problems of measuring the flow rate of natural gas

2009 ◽  
Vol 52 (5) ◽  
pp. 509-513
Author(s):  
E. P. Pistun ◽  
F. D. Matiko ◽  
O. Ya. Masnyak
Keyword(s):  
Natural Gas ◽  
Flow Rate ◽  
Thomson Coefficient

Developing novel correlations for calculating natural gas thermodynamic properties

2011 ◽  
Vol 32 (4) ◽  
pp. 435-452 ◽  
Author(s):  
Mahmood Farzaneh-Gord ◽  
Hamid Rahbari
Keyword(s):  
Experimental Data ◽  
Natural Gas ◽  
Thermodynamic Properties ◽  
Real Time ◽  
Internal Energy ◽  
Compressibility Factor ◽  
Time Process ◽  
Gas Composition ◽  
Pure Methane ◽  
Thomson Coefficient

Developing novel correlations for calculating natural gas thermodynamic properties Natural gas is a mixture of 21 components and it is widely used in industries and homes. Knowledge of its thermodynamic properties is essential for designing appropriate processes and equipment. This paper presents simple but precise correlations of how to compute important thermodynamic properties of natural gas. As measuring natural gas composition is costly and may not be effective for real time process, the correlations are developed based on measurable real time properties. The real time properties are temperature, pressure and specific gravity of the natural gas. Calculations with these correlations are compared with measured values. The validations show that the average absolute percent deviation (AAPD) for compressibility factor calculations is 0.674%, for density is 2.55%, for Joule-Thomson coefficient is 4.16%. Furthermore, in this work, new correlations are presented for computing thermal properties of natural gas such as enthalpy, internal energy and entropy. Due to the lack of experimental data for these properties, the validation is done for pure methane. The validation shows that AAPD is 1.31%, 1.56% and 0.4% for enthalpy, internal energy and entropy respectively. The comparisons show that the correlations could predict natural gas properties with an error that is acceptable for most engineering applications.

A novel method for calculating natural gas density based on Joule Thomson coefficient

2015 ◽  
Vol 26 ◽  
pp. 1018-1029 ◽  
Author(s):  
M. Farzaneh-Gord ◽  
M. Farsiani ◽  
A. Khosravi ◽  
A. Arabkoohsar ◽  
F. Dashti
Keyword(s):  
Natural Gas ◽  
Gas Density ◽  
Novel Method ◽  
Thomson Coefficient

A simplified method of emulsion coating and development for quantitative electron microscopic radioautography

1978 ◽  
Vol 36 (2) ◽  
pp. 64-65
Author(s):  
K. Yoshida ◽  
F. Murata ◽  
S. Ohno ◽  
T. Nagata
Keyword(s):  
Mass Production ◽  
Identical Condition ◽  
Microscopic Level ◽  
Electron Microscopic Level ◽  
Electron Microscopic ◽  
Simplified Method ◽  
Complicated Process ◽  
Critical Problems ◽  
Electron Microscopic Radioautography ◽  
Quantitative Radioautography

IntroductionSeveral methods of mounting emulsion for radioautography at the electron microscopic level have been reported. From the viewpoint of quantitative radioautography, however, there are many critical problems in the procedure to produce radioautographs. For example, it is necessary to apply and develop emulsions in several experimental groups under an identical condition. Moreover, it is necessary to treat a lot of grids at the same time in the dark room for statistical analysis. Since the complicated process and technical difficulties in these procedures are inadequate to conduct a quantitative analysis of many radioautographs at once, many factors may bring about unexpected results. In order to improve these complicated procedures, a simplified dropping method for mass production of radioautographs under an identical condition was previously reported. However, this procedure was not completely satisfactory from the viewpoint of emulsion homogeneity. This paper reports another improved procedure employing wire loops.

Rate of Sublimation of Ice by Radiative Heating in Freeze-Etching

1980 ◽  
Vol 38 ◽  
pp. 618-619
Author(s):  
Yeshayahu Talmon
Keyword(s):  
Heat Flux ◽  
Freeze Fracture ◽  
Constant Heat Flux ◽  
Radiative Heating ◽  
Constant Heat ◽  
Entire Sample ◽  
Simplified Method ◽  
Freeze Etching ◽  
Sublimation Rates ◽  
Fractured Surface

To bring out details in the fractured surface of a frozen sample in the freeze fracture/freeze-etch technique,the sample or part of it is warmed to enhance water sublimation.One way to do this is to raise the temperature of the entire sample to about -100°C to -90°C. In this case sublimation rates can be calculated by using plots such as Fig.1 (Talmon and Thomas),or by simplified formulae such as that given by Menold and Liittge. To achieve higher rates of sublimation without heating the entire sample a radiative heater can be used (Echlin et al.). In the present paper a simplified method for the calculation of the rates of sublimation under a constant heat flux F [W/m2] at the surface of the sample from a heater placed directly above the sample is described.

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