Study on the Flow of Briquette Gas in the Ondol Heating System (Chimney Draft of Low Temperature Moist Air)

온돌의 연탄개스유량에 관한 연구(1) (함습저온열기류의 굴뚝통풍력)

Natural draft and flow which low temperature moist gas produces in the chimney of an Ondol heating system were numerically analysed. Among several factors involved inlet gas temperature has the strongest influence on the chimney performance and then next specific humidity of the gas. Thermal conductivity of the chimney wall, however, has little influence on the performance of such a low temperature chimney. Under given flow conditions there exists an optimum chimney height which gives a maximum flow rate for a given chimney diameter. This optimum value of chimney height inereases with increase in chimney diameter, inlet gas temperature and specific humidity.