Browsing by Author "Chien Chih-Liang"

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Corona-wire unipolar aerosol charger
(2014-07-15)
Tsai Chuen-Jinn
;
Chien Chih-Liang
;
Wattanamekhinkul Virat
This invention relates to the reduction of charged particle loss by radially introducing sheath air from the porous wall. The corona-wire unipolar aerosol charger of the present invention includes a charging chamber, at least one aerosol inlet channel, a corona wire, an annular sheath air inlet opening, a porous tube defining a charging chamber, an annular sheath air outlet opening, and an aerosol outlet channel. The sheath air inlet opening is for radially introducing a sheath air flow into the charging chamber. The charged particles will not deposit on the wall surface of the charger if the radial velocity of the introduced sheath air at the wall is higher or comparable to the electrostatic velocity of charged particles. The dilution effect of charged particle due to the use of clean air can be further minimized by redirecting the excess clean air to the outside of the charger.
Tube bundle heat exchanger of constant temperature gradient for thermophoretic deposition of aerosol particles
(2011-05-03)
Tsai Chuen-Jinn
;
Huang Shih-Hsuan
;
Chien Chih-Liang
This invention is a tube bundle heat exchanger for thermophoretic deposition of aerosol particles. It has a housing with an internal chamber, and several cold and hot tubes. The cold and hot tubes are arranged in a staggered manner in the internal chamber of the housing. Low and high temperature fluids flow inside the cold and hot tubes, respectively. When the exhaust gas passes through the chamber, temperature gradient between the cold and hot tubes causes aerosol particles suspended in the exhaust gas to deposit on the surface of cold tubes to achieve the treatment of exhaust gas. Staggered arrangement of cold and hot tubes can maintain nearly constant temperature gradient in the direction of the gas flow thereby enhances the overall removal efficiency of particles.