STUDY ON BIOMASS-BASED GASIFIER COOKSTOVE FOR DOMESTIC APPLICATION

摘要

Indoor air pollution and emission from biomass cookstoves remain an issue,since a long time.Clean burning and high fuel efficiency are two focus areas required when designing improved biomass cookstoves.A forced draft wood gasifier with a separate gas generator and gas burner was considered to overcome the pollution issues associated with biomass combustion.This study is focusing on separating the biomass combustion gasification chamber located outside the kitchen.The cooking is done by having a producer gas burner in the kitchen.The impact of operating the gasifier stove in both top-lit updraft (TLUD) and bottom-lit updraft (BLUD) were studied.This concept permits the gasifier to be located away from the kitchen,avoiding indoor smoke during the ignition stage.The kitchen remains clean and comfortable.Operation in TLUD mode faced problems of flame instability.Operating the gasification chamber in BLUD mode provides a stable flame.It was observed that gas from BLUD mode has higher heat content than the TLUD operation.The performance of the BLUD gasifier stove is presented in detail,in the following chapters.