Arpakorn Wattana และ Pipatpong Watanawanyoo; Supattana Nirukkanaporn. (2020) A study on thermal efficiency of downdraft gasifier (swirl air type). <i>JOURNAL OF CURRENT SCIENCE AND TECHNOLOGY</i>, <i>10</i>(2), 203-215.Arpakorn Wattana และ Pipatpong Watanawanyoo; Supattana Nirukkanaporn. "A study on thermal efficiency of downdraft gasifier (swirl air type)". JOURNAL OF CURRENT SCIENCE AND TECHNOLOGY 10 (2020):203-215.Arpakorn Wattana และ Pipatpong Watanawanyoo; Supattana Nirukkanaporn. A study on thermal efficiency of downdraft gasifier (swirl air type). Rangsit University:ม.ป.ท. 2020.