Main Article Content
Mass and energy balance was applied to assess performance operation for downdraft gasifier. This research evaluate performance of downdraft gasifier with generator 20 kW. This system utilizes corncob as a fuel. The system tested and measured syngas by gas analyzer. The quantity of producer gas in system comprise of carbon monoxide 20%, methane 2%, hydrogen 18%, oxygen 2%, carbon dioxide 10% and nitrogen 48%. The heating value of the gas is 6 MJ/m3. Producer gas is cleaned by gas cleaning unit which consists of cyclone and filter. Therefore producer gas before entering the engine has a temperature of about 38 0C. The performance evaluation system can be evaluate be using cold gas efficiency, gas to power efficiency of the system and wood to electrical power production efficiency was 54%, 23% and 12% respectively. Power losses from the system in the process gasification is 46% and power losses from power generation system of generator is 42%.
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