• thermo-economic analysis of a micro-cogeneration system based on a rotary steam engine (rse)

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 524
    • تعداد پرسش و پاسخ ها: 0
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     a rotary steam engine (rse) is a simple, small, quiet and lubricant-free option for micro-cogeneration. it is capable of exploiting versatile thermal sources and steam temperatures of 150–180 °c, which allow operational pressures less than 10 bar for electrical power ranges of 1–20 kwe. an rse can be easily integrated in commercially available biomass-fired household boilers. in this paper, we characterize the boiler-integrated rse micro-cogeneration system and specify a two-control-volume thermodynamic model to conduct performance analyses in residential applications. our computational analysis suggests that an rse integrated with a 17 kwth pellet-fueled boiler can obtain an electrical output of 1.925 kwe, in the design temperature of 150 °c, the electrical efficiency being 9% (based on the lower heating value of the fuel, lhv) and the thermal efficiency 77% (lhv). in a single-family house in finland, the above system would operate up to 1274 h/y, meeting 31% of the house's electrical demand. the amount of electricity delivered into the grid is 989 kw h/y. an economic analysis suggests that incremental costs not exceeding € 1500 are justifiable at payback periods less than five years, when compared to standard boilers.

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