抄録
We aim to achieve high efficient of the biomass gasification power generation (BGPG) system. To achieve higher efficiency, BGPG was composed by using exergy recuperation concept. This concept can explain the potential of heat recuperation for increasing the thermal efficient. Exergy can show a barometer of the quality of energy. We used the data of gasification of four feedstocks (corn stover, switchgrass, wheat straw and wood) by the National Renewable Enegy Laboratory (NREL). The results from this study show that significant differences between the feedstocks. The target of system is as follows; Feed biomass: 126 kg-dry/h, Cold gas efficiency: 51〜63%, Energy efficiency: 26%. System are modeled with HYSYS. Primary progression, the feedstocks pass from a Dual Fluidized Bed (DFB) to a thermal cracker. This progression make the syngas(H_2, CO and CH_4) with the pyrolysis and steam reforming. Secondary progression, the side products (Char and Tar) were removed by cyclonic separator and then entered a scrubber. Finaly progression, syngas is burned in the 200kW of micro gas turbine (MGT), then exergy recuperation was performed using hot exhaust gas from MGT.
