Improved repowering techniques for power plants

Niels Houbak, Simon E. Andersen, Stiig Bo Petersen, Søren Hansen

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


    Repowering of existing coal-fired power plants is often accomplished by adding gas turbines. In this paper we assume that the gas turbine exhaust is used for feed water preheating.Typical gas turbine exhaust temperatures are in the range 450-600C whereas typical boiler inlet temperatures are 250-300C. The big difference in temperature between exhaust and water prevents an efficient exchange of heat. One way to lower the exhaust temperature is to expand the gas to sub atmospheric pressure. The result is a 50% increase in possible installed gas turbine power.
    Original languageEnglish
    Title of host publicationEfficiency, Cost, Optimization, Simulation and Environmental aspects of Energy Systems and Processes
    Place of PublicationNancy, France
    Publication date1998
    Publication statusPublished - 1998
    EventECOS '98 - Nancy, France
    Duration: 1 Jan 1998 → …


    ConferenceECOS '98
    CityNancy, France
    Period01/01/1998 → …

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