Wyniki wyszukiwania - Biblioteka Nauki

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Phase equilibria for liquefi eld natural gas (LNG) as a multicomponent mixture

100%

Włodek T.

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tom Vol. 32, no. 3

539--550

EN

Liquefied natural gas (LNG) has an increasingly important role in the global natural gas market. Global demand for natural gas will grow over the coming years. LNG is transported by ships to unloading points on the storage terminals. During the LNG unloading and storage processes some part of LNG evaporates into gas phase and causes changes in the composition of stored LNG. The main component of LNG is methane, the remaining components are primarily ethane, propane, butane and nitrogen. Depending on the participation of these components the basic thermodynamic parameters of LNG can significantly change. LNG is also product sensitive to changes of temperature. In order to better prediction of changes of individual paramete rs of stored LNG caused by changes of temperature and LNG composition vapor-liquid equilibrium (VLE) calculations are performed for cryogenic conditions using equations of state.

2

Wpływ zmienności składu na właściwości skroplonego gazu ziemnego w aspekcie stabilności procesu magazynowania

51%

Łaciak M. , Oliinyk A. , Sikora A. P. , Włodek T.

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tom T. 97, nr 2

267--271

PL

Modelowano właściwości skroplonego gazu ziemnego w zależności od jego składu w celu prognozowania jego zachowania się po wzroście temperatury w zbiornikach magazynowych oraz w trakcie ich napełniania. Opisano zjawisko roll-over zachodzące w czasie magazynowania gazu i polegające na rozwarstwianiu się cieczy o różnych gęstościach.

EN

Properties of liquefied natural gas were modeled according to its compn. to predict its behavior after temp. increase in the storage tanks and during their filling. A roll-over effect during the liquefied natural gas storage consisted in stratification of liqs. of different densities was described.

3

An application of a Raman scattering analyzer for the determination of natural gas composition at a processing plant

51%

Włodek T. , Kuczyński S. , Smulski R. , Polański K.

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2016

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tom Vol. 33, no. 3

619--627

EN

The development of conventional and unconventional natural gas reservoir management includes continuous monitoring of hydrocarbon exploitation processes and its impact on the reservoir and environment. Raman spectroscopy, which allows for the identification of reservoir fluids (including natural gas) components can be a very promising method for the application of providing a quick, non-invasive, nondestructive analysis. The proposed in this paper measurement methods are focused on the use of:– a laboratory cell (autoclave) with sapphire window mounted on a specially prepared bypass pipeline;– a dedicated Raman probe mounted to the available installed stub pipe;– the construction of a special measurement cell. The article presents the basic technical assumptions for measurements of the composition of natural gas with the use Raman spectroscopy.

4

Analiza efektywności ekonomicznej zastosowania turboekspanderów w procesie regazyfikacji skroplonego gazu ziemnego

51%

Liszka K. , Łaciak M. , Olijnyk A. , Włodek T.

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tom T. 97, nr 6

892--895

PL

Modelowano efektywność ekonomiczną zastosowania turboekspandera w celu wytworzenia energii elektrycznej w procesie regazyfikacji skroplonego gazu ziemnego o różnych składach. Opisano podstawy termodynamiczne procesu rozprężania w ekspanderze oraz wyznaczono zdyskontowany okres zwrotu inwestycji dla założonych parametrów.

EN

Energy efficiency of the liquefied natural gas regasification in a turboexpander was calcd. for 2 typical gas compns. and gas flow (70-210)·103 m 3/h, under 10-15 MPa. Thermodynamic anal. of the expansion showed a possibility to produce more than 1 GW for the lowest gas flow and pressure. The discounted payback period on investment for the parameters was however longer than 10 years.

5

Application of Raman spectroscopy analysis in unconventional natural gas reservoirs – density and pressure dependence on Raman signal intensity

38%

Kuczyński S. , Włodek T. , Smulski R. , Dąbrowski K. , Krakowiak M. , Barbacki J. , Pawłowski M.

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tom Vol. 34, no. 3

761--774

EN

This paper contains information about Raman spectroscopy, describing its possible application in the oil and gas industry. This method allows the performance of a series of repetitive measurements to determine the composition of samples and its changes with high accuracy. In the article, the data presented in the literature connected with Raman spectroscopy and the oil and gas industry is analyzed. This paper considered measurements of a natural gas composition in simulated in-situ conditions performed using Raman spectroscopy. The current research project is trying to develop a mobile apparatus which would use Raman spectroscopy for defining reservoir fluid compounds in high pressure and high temperature conditions. The preliminary measurements were carried out in the simulated in-situ in variant pressure conditions.