Economic assessment of gas-steam systems taking account of variable loads

Sebastian Lepszy, Tadeusz Tadeusz Chmielniak, Daniel Czaja

Abstract


Increasing competition from high-power gas technologies on the energy market depends on many factors. Apart from the requirement to meet ecological criteria, the most important of them are: an improvement in thermal flexibility, favourable characteristics of performance under variable loads and the economic efficiency related thereto. The adaptability of gas technologies to changes in loads in the 24-hour cycle is now gaining special importance. This paper is focused on issues related to adapting the methodology of economic calculations to changing functions of gas technologies in the electricity generation sub-sector. In the new market environment, the economic model comprising a certain number of parameters (which usually characterize the base load) and taking account of revenues coming from this type of operation does not provide a full picture. First and foremost, it does not indicate additional revenues that could potentially be earned from new market possibilities related to rendering system services and lessening the environmental impact. Generally speaking, a more accurate approach to the assessment of gas-steam systems has to take account of basic parameters that determine thermal flexibility (start-up and shutdown times), issues related to maintaining availability, changes in efficiency under variable loads and emissions characteristics.

Full Text:

PDF

References


ISO 11086: 1996 (E/F), Gas Turbines – Vocabulary

Kaliski M. et al.: Natural Gas in Poland and the European Union. Archiwum Energetyki, Vol. XLII, No 1, 2012, pp. 93-107

Janusz P.: Aktualna sytuacja na rynku gazu ziemnego-perspektywy rozwoju [Current situation on the natural gas market – prospects of development]. Polityka Energetyczna , Vol. 16, Book .2, 2013

Kotowicz J.: Elektrownie parowo-gazowe [Steam-gas power plants]. Kaprint , Lublin, 2008

Skorek J., Kalina J. : Gazowe układy kogeneracyjne [Gas turbine cogeneration systems].WNT, Warszawa 2005

Sierpińska M., Jachna T.: Ocena przedsiębiorstwa według standardów światowych [An enterprise assessment according to the world standards]. PWN, Warszawa, 1999

Skrzypek J.: Biznesplan Model Najlepszych Praktyk [Business plan – A model of best practices]. Poltex MT Biznes, December 2010

Gulen S. Can, Mazumder I.: An Expanded Cost of Electricity Model for Highly Flexible Power Plants. ASME Paper GT2012-68299, 2012

Tsukagoshi K., Muyama A., Masada J., Iwasaki Y., Ito E. : Operating Status of Uprating. Gas Turbines and Future Trend of Gas Turbine Development. Mitsubishi Heavy Industries Technical Review Vol. 44 No.4, 2007

Maekawa A. : Evolution and Future Trend of Large Frame Gas Turbine for Power Generation. J. of Power and Systems, Vol. 5, No 2, 2011

Siemens Combined Cycle Power Plants. www.siemens.com/energy

J-series Gas Turbine. www.mhi.co.jg/en/power/infex.html

Balling L.: Fast Cycling and Rapid Start-up: New Generation of Plants Achieves Impressive Results. Modern Power Systems, January 2011

Picard A. Meinecke G. : The Future Role of Fossil Power Generation. www.siemens.com/energy

Technical Performance Gas Power Plants. www.alstom.com/power

www.ge-flexibility.com

Balling L.: Flexible Future for Combined Cycle. Modern Power Systems, December 2010


Refbacks

  • There are currently no refbacks.