Performance Evaluation of Downdraft Gasifier for Generation of Engine Quality Gas

Abstract

The use of renewable energy resources is broadly increasing for power generation, so the engine quality producer gas which comes from gasifier must be evaluated for engine applications. The Internal Combustion Engine (ICE) generates electricity for lighting & other end uses. The system consists of a gasifier coupled with ventury scrubber, coarse filter filled with wood chips; two fine filters filled with saw dust and one security fabric filter. The gases produced are cooled in water scrubber and then tar is removed in subsequent filters and gases are supplied to Spark Ignition Engine for operating AC Generator set. The unit is tested with resistive loading, which increases gradually from 20 %, 40 %, 60 %, 80 % & 100%. The cold and hot gasification efficiencies are 75.41% & 80.85 % respectively. The biomass consumption rate is 27kg/h. The air and gas flow rate are measured 20.79 m3/h and 79m3/h respectively.The temperature above the grate is 603℃. The tar level after gas cooling and cleaning unit is counted 9 mg/Nm3