| Author | Pongsid Srikhirin |
| Call Number | AIT Thesis no. ET-94-3 |
| Subject(s) | Fluidized-bed combustion
|
| Note | A thesis submitted in partial fulfillment of the requirements for the Degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | This report presents the results of an experimental study of voidage in both conventional and pulsated circulating fluidized bed. The heat transfer and hydrodynamics in pulsated circulating fluidized bed are also studied. Experimental studies on hydrodynamics and heat transfer in both conventional and pulsated circulating fluidized bed were conducted using silica sand as the bed material. Three different average sizes of sand were used i.e. 200, 300 and 420 micron. The pulsation was conducted by two methods i.e. dissipation of the sonic wave from a loudspeaker installed above the top of riser column and pulsation of fluidizing air by an air chopping machine. The experimental works on voidage distribution profile were conducted with variation of particles size, riser and aeration air flow rates and total bed inventory. Study on hydrodynamics in the cold pulsated bed as well as heat transfer in hot bed was carried with variation of pulsation frequency i.e. 1, 2 and 3 kHz. Output sonic power employed was 25, 55 and 75 watt. Highest increased solid circulation rate was found with 1 kHz sonic vibration. The percentage increase was observed to be 28.55 % with 300 micron particles, 10.92 % with 420 micron particles and with 3 kHz as 20.53 % with 200 micron particles. The maximum increase of the overall bed to wall heat transfer coefficient was observed to be 18.89% with 200 micron particles at 3kHz sonic vibration frequency. |
| Year | 1994 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Energy Technology (ET) |
| Chairperson(s) | Bhattacharya, Sribas C. |
| Examination Committee(s) | Karmazsin, Etienne;Surapong Chiraratananon |
| Scholarship Donor(s) | The Government of Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1994 |