New alternatives for electricity production. Part 4. Performance of peat-fuelled air gasification combined-cycle power plants

Yrjö Solantausta, Tuula Mäkinen, Esa Kurkela, Kai Sipilä

Research output: Book/ReportReport

Abstract

The objectives of the study were preparation of the process design and flowsheets and mass and energy balances for two peat-fuelled gasifica?tion combined cycles: one using the present technology and the other the potential technology; and a continued development of a consistent set of techno-economic evaluations of new biomass fuelled combined-cycle power plants under development. A process analysis computer program, ASPEN PLUSTM, was used as the basic framework for performing the energy and material balances. Although the programme was not developed especially for power plant design, it is quite suitable for this application due the features of inte?grated gasification-combined cycles. Both cogeneration power plant concepts were designed around an existing gas turbine. The major differences between the two concepts were the gas turbine combustion temperature (1 120/1 300 ?C), and the method of gas cleaning (cold/hot). The power production efficiency of the present case was 41 % and that of the potential case 45 %. The power-to-heat ratio increased from 0.91 to 1.03, when potential technology was applied. The potential case is quite promising for cogeneration, since, in addition to the high efficiency, its capital costs should be lower than those of the present case. Gasification-combined cycles should be of extreme interest for utilities, since their high power-to-heat ratio of about 1.0 is favour?able compared with 0.5, typical of conventional solids-fuelled cogene?ration power plants.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages77
ISBN (Print)951-38-4344-0
Publication statusPublished - 1993
MoE publication typeNot Eligible

Publication series

SeriesVTT Tiedotteita - Meddelanden - Research Notes
Number1451
ISSN1235-0605

Keywords

  • electricity power
  • power generation
  • gasification
  • combined-cycle power plants
  • peat
  • air

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    Solantausta, Y., Mäkinen, T., Kurkela, E., & Sipilä, K. (1993). New alternatives for electricity production. Part 4. Performance of peat-fuelled air gasification combined-cycle power plants. VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 1451