Optimization of gassing-up operation based on comparative analysis of two twin ethylene carriers

• Autorzy: Wieczorek A. , Giernalczyk M.

Identyfikatory

DOI

10.5604/01.3001.0012.2516

• Języki publikacji: EN

Abstrakty

EN

The article consists comparative analysis of the gassing-up operation – purging cargo tanks with cargo vapour, on gas carriers carrying primarily Ethylene – one of the most expensive cargo of all hydrocarbons carrying by the sea. The source of the problem constitutes similar densities of both gases under specific conditions – Ethylene and Nitrogen – a gas that tanks are purged before gassing-up. The analysis is made for considerable optimization of the process. The comparison of gassing-up methods is based on tests and measurements on two particular twin gas carriers. In both cases different methods – parallel and cascade were chosen to do the gassing-up (parallel means to purge tanks separately at the same time, cascade means to purge tanks one after the other) what allows specifying beneficial procedure. What was estimated during voyages were technical parameters measured during gassing-up, time of the process and the most important information – loss of the cargo. Analysis of particular stages of the operation also allows estimate the level of gas mixing in the tank. The basic purpose of this profile, based on Ethylene loss, is selecting alternative for carrying this operation in more efficient way, what constitutes determining the most proper method of gassing-up – parallel or cascade and setting temperatures, pressures, mass flows which minimize vapour of Ethylene vented to the atmosphere.

Słowa kluczowe

EN

gassing-up; gas mixing; ethylene; nitrogen

PL

odgazowanie; mieszanie gazu; etylen; azot

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2018
• Tom: Vol. 25, No. 1
• Strony: 441--446
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Wieczorek A.

• Gdynia Maritime University Marine Power Plants Department Morska Street 83, 81-225 Gdynia, Poland tel.: [phone]

autor

Giernalczyk M.

• Gdynia Maritime University Marine Power Plants Department Morska Street 83, 81-225 Gdynia, Poland tel.: [phone]

Bibliografia

• [1] Włodarski, J. K., (ed.), Bezpieczeństwo Transportu Gazów Skroplonych Na Zbiornikowcach, Poradnik dla oficerów statków morskich, Studium Doskonalenia Kadr S.C. Wyższej Szkoły Morskiej, Gdynia 1993.
• [2] McGuire and White, Liquefied Gas Handling Principles On Ships and in Terminals, Witherby&Co Ltd, London 2000.
• [3] Nanowski, D., Analiza Wydajności Chłodniczej Kaskadowego Obiegu Skraplania Etylenu i Stanu Izolacji Zbiorników Ładunkowych Podczas Transportu Ładunku na Gazowcu LPG oPojemności 22500 m3, Zeszyty Naukowe Politechniki Rzeszowskiej 290, Mechanika,RUTM, T. XXXI, Z. 86 (2/14), pp. 225-230, 2044.
• [4] Ship owner’s data, London 2017.
• [5] Ship owner’s data, London 2018.
• [6] Ship owner’s documentation, London 2015.
• [7] Mieczyński, M., Istota symetrii termodynamiki klasycznej i współczesnej, Oficyna Wydawnicza Politechniki Wrocławskiej, Wroclaw 2003.
• [8] Nanowski, D., The Influence Of Incondensible Gases On The Refrigeration Capacity Of The Reliquefaction Plant During Ethylene Carriage By Sea, Journal of KONES Powertrain and Transport, No. 3, pp. 359-364, 2016.
• [9] Serwiński, M., Zasady inżynierii chemicznej i procesowej, Wydawnictwo Naukowo-Techniczne, Warszawa 1982.
• [10] Wieczorek, A., The problem of insufficiently optimal gassing-up operation carrying after tanks inerting with reference to ethylene carriers, Scientific Journal of Gdynia Maritime University, No. 100, pp. 179-186, Gdynia 2017.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018).