Thermodynamic analysis of power efficiency for dual-fuel monic combined-cycle plants
DOI:
https://doi.org/10.15587/1729-4061.2015.43465Keywords:
dual-fuel monic combined-cycle plant, forced boiler, fuels-substitutes for natural gasAbstract
Materials on developing dual-fuel monic combined-cycle plants, including additional steam generator - forced-circulation boiler, operating on fuels-substitutes for natural gas were given. Cases, when a heat recovery circuit operates in the feed-water heating mode and heating-evaporation mode were considered. For these modes, corresponding schematics were designed. It was shown that in order to replace deficient natural gas, forced-circulation boiler may use low-grade solid or liquid low-calorie fuels in the first case and average-calorie fuels-substitutes in the second. Regularities of thermodynamic processes in dual-fuel monic combined-cycle plants with forced-circulation boiler were determined. It was found that using the remote steam generators in the circuit allows to transfer a part of heat recovery circuit functions on it. This reduces the thermodynamic overload of the circuit and improves the cycle efficiency. The analysis of work processes in the combustion space and steam generating circuit of the forced-circulation boiler was performed. The assessment of power efficiency of dual-fuel monic combined-cycle plants with forced-circulation boiler was conducted. The comparison of the key technical and economic parameters of the proposed monic combined-cycle plant, basic GTP and the "Vodoley" ("Aquarius") type monic combined-cycle plant was carried out.
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Copyright (c) 2015 Наталия Михайловна Фиалко, Реграги Абубакр, Ольга Николаевна Кутняк, Людмила Акимовна Швецова, Раиса Александровна Навродская
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