Performance Improvement of Circulating Inclined Fluidized Bed Applied to Desiccant Dehumidification Systems

• Main Authors: Tai-Chih Hung, 洪泰智
• Other Authors: 陳希立
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/02491290140676452898

碩士 === 國立臺灣大學 === 機械工程學研究所 === 104 === The purpose of this study is to design a inclined circulating fluidized bed that maintains a healthy indoor environment and be energy-efficient. With gravity, the design of particle channels vertical to the bed and the characteristics of the fluidized bed. The system can adsorb water continuously without funnel and corner joints. First, compared to the circulating inclined fluidized beds device. The total adsorption amounts of circulating improved inclined fluidized bed increased by 6.8% when the air speed was 3 m/s, the entrance air temperature was 27℃and relative humidity was 70% in the adsorption bed, the entrance air temperature was 50℃in the desorption bed , and filled with 4mm diameter silica gel, total weight 550 g, in each bed. Under this condition, the pressure loss and the energy consumption of fan reduced by 10.6% and 11.8% respectively. The result indicated that the circulating improved inclined fluidized bed has better dehumidification performance than the circulating inclined fluidized bed. Second, changed the geometric parameters of the circulating improved inclined fluidized bed. Maintain the high of desorption bed base and adjust particle channels to 20 cm high of the adsorption bed, accordingly, the total adsorption amounts increased by 16%. Further, simulation ambient air conditions at Taipei 2014 annual. The total adsorption amounts was 729.5 kg , compared to the circulating inclined fluidized beds device, the dehumidification performance of circulating improved inclined fluidized bed increased by 14.1% When the entrance air temperature was 30℃and relative humidity was 80% in the adsorption bed, the entrance air temperature was50℃ in the desorption bed, compared to the circulating improved inclined fluidized beds device with silica gel, the adsorption capacity of particles mixed with silica gel and polymer was lower than silica gel 11.6%. The result indicated that silica gel has better particles mixed with silica gel and polymer. Last, the dehumidification will increase 5.7% when inclined circulating fluidized bed adjust to 10°, but this system can not maintaining stability in a long time.