Cogenerative Performance of a Wind − Gas Turbine − Organic Rankine Cycle Integrated System for Offshore Applications

Michele Bianchi, Lisa Branchini, Andrea De Pascale, Francesco Melino, Valentina Orlandini, Antonio Peretto, Fredrik Haglind, Leonardo Pierobon

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Gas Turbines (GT) are widely used for power generationin offshore oil and gas facilities, due to their high reliability,compactness and dynamic response capabilities. Small heavyduty and aeroderivative units in multiple arrangements aretypically used to offer larger load flexibility, but limitedefficiency of such machines is the main drawback. A solutionto enhance the system performance, also in Combined Heat andPower (CHP) arrangement, is the implementation of OrganicRankine Cycle (ORC) systems at the bottom of the gas turbines.Moreover, the resulting GT-ORC combined cycle could befurther integrated with additional renewable sources.Offshore wind technology is rapidly developing and floatingwind turbines could be combined with offshore GT-ORC basedpower plants to satisfy the platform load.The pioneering stand alone power system, for an oil and gasplatform, examined in this paper comprises a 10MW offshorewind farm and three gas turbines rated for 16:5MW, eachone coupled with an 4:5MW ORC module. The ORC mainparameters are observed under different wind power fluctuations.Due to the non-programmable availability of wind and powerdemand, the part-load and dynamic characteristics of the systemshould be investigated. A dynamic model of the power systembased on first principles is used, developed in the Modelicalanguage. The model is integrated with a time series-basedmodel of two offshore wind mills. Various thermodynamicindexes, available in the literature, are identified and evaluatedto compare the actual combined heat and power performancesof single components and of the overall integrated system in theconsidered wind scenarios.
Original languageEnglish
Title of host publicationProceedings of ASME Turbo Expo 2016
Number of pages16
PublisherAmerican Society of Mechanical Engineers
Publication date2016
Article numberGT2016-57167
ISBN (Electronic)978-0-7918-4974-3
Publication statusPublished - 2016
EventASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition GT2016 - Seoul, Korea, Republic of
Duration: 13 Jun 201617 Jun 2016


ConferenceASME Turbo Expo 2016
CountryKorea, Republic of


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