Combined heat and power plant on offshore oil and gas installations

• Autorzy: Følgesvold, E. , Skjefstad, H. S. , Riboldi, L. , Nord, L. O.
• Języki publikacji: EN

Abstrakty

EN

Implementation of energy efficient technologies is an issue of growing importance for the offshore oil and gas industry. Rising awareness of increasing levels of CO2in the atmosphere is a major driver in this move, with a main aim being to reduce the amount of released CO2 per unit of oil or natural gas produced. Subsequently, the addition of steam bottoming cycles to exploit exhaust heat from gas turbines offshore has become an attractive alternative. This paper will investigate two different combined cycle configurations, namely the extraction steam turbine- and the backpressure steam turbine-cycle. Both cycles were modelled using the process simulation software Ebsilon Professional with a single GE LM2500+G4 gas turbine as a topping cycle, and a once-through heat recovery steam generator to exploit GT exhaust heat. At design, the steam turbines produced 8.2 MW and 6.0 MW respectively, achieving net thermal efficiency of 45.5%/42.1%. This was a 12.3 pp/8.9 pp increase compared to the simple cycle GE LM2500+G4 configuration. The findings suggest that a backpressure steam turbine could be an attractive option for oil producing facilities with high demand for process heat, while an extraction steam turbine configuration is more suited to gas producing facilities with lower heat requirements and a higher demand for power and flexibility. Additionally, both cycles displayed a substantial reduction in emitted CO2 per MWh produced, with reductions 26% and 21% compared to the simple cycle configuration achieved for the extraction and backpressure cycle respectively.

Słowa kluczowe

PL

układ gazowo-parowy; symulacja procesu; odzysk ciepła; cykl parowy; obieg pary; kogeneracja; turbina parowa; turbina parowa upustowo-kondensacyjna; turbina parowa przeciwprężna

EN

combined cycle; process simulation; heat recovery; compact steam cycle; cogeneration; off-design; extraction steam turbine; back-pressure steam turbine

• Czasopismo: Journal of Power Technologies
• Rocznik: 2017
• Tom: Vol. 97, nr 2
• Strony: 117--126
• Opis fizyczny: Bibliogr. 20 poz., rys., tab., wykr.

Twórcy

autor

Følgesvold, E.

• Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, Norway

autor

Skjefstad, H. S.

• Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, Norway

autor

Riboldi, L.

• Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, Norway

autor

Nord, L. O.

• Department of Energy and Process Engineering, Norwegian University of Science and Technology, Trondheim, Norway,

Bibliografia

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).