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An evaluation of the possibilities of using turboexpanders at pressure regulator stations

Osiadacz A. J., Chaczykowski M., Kwestarz M.

Journal of Power Technologies

2017

Vol. 97, nr 4

289--294

Natural gas in Poland is transported by onshore pipelines with a maximum operating pressure of up to 8.4 MPa. The gas pressure is then reduced to 1.6 MPa or 0.4 MPa for delivery to regional/local distribution networks or to end-user installations. The pressure reduction is usually performed by a pressure regulator. Pressure reduction can also be achieved through expansion of the gas at the turboexpander, which can be harnessed to produce electricity from the recovered mechanical energy of the gas. The main objective of this study is to investigate the factors influencing the efficiency of the gas expansion process and to carry out a feasibility study involving the application of turboexpanders at selected natural gas pressure regulator stations belonging to the Polish transmission system operator Gaz System S.A.

Characterization of the Reliquefaction Systems installed on board of the LNG ships

Matyszczak M., Kaszycki L.

Zeszyty Naukowe / Akademia Morska w Szczecinie

2011

nr 28 (100) z. 1

83-87

The article refers to BOG reliquefaction plants installed on the new generation LNG ships board. The construction, principle of operation and properties of the Hamworthy reliquefaction systems MARK I and MARK III were described. The layout diagrams and the process flow charts of these systems were enclosed. The construction comparisons of both systems were carried out and technology development advantages of the reliquefaction systems were presented.

Artykuł dotyczy systemów skraplania gazu BOG stosowanych na najnowszych statkach LNG. Opisano w nim budowę i zasadę działania dwóch systemów skraplania MARK I i MARK III firmy HAMWORTHY. Zamieszczono schematy funkcjonalne tych systemów. Scharakteryzowano i porównano konstrukcje i właściwości obu systemów.