Charun Likitrattanaporn creator Athapol Noomhorm Chairperson Jindal, Vinod Kumar Examination Committee Ilangantileke, S.G. Examination Committee Vincent, Jean Claude Examination committee Rajamangala Institute of Technology (RIT) Ministry of Education, Thailand Scholarship donor text th Bangkok Asian Institute of Technology 1993 monographic eng

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96 leaves : ill. The experiments in volved drying high moisture paddy using different dryingair temperatures, exposure time a nd tempering time were conducte d by using co lumn ar cross fl ow t ype dryer b oth s t atic and moving condition s . Fro m the data gain ed, it was d iscovered that goo d g r a in quality co uld be obtai n e d by using multi pass drying wit h different dr y in g co ndi tions in each pass. There were tw o import an t parameters affec t e d to qualifi e d dry in g: drying a ir temperature a nd ex po s u re tim e. To ad ju s t tho se tw o parameters s imp ly on drtf'ing operatio n, th e gra in t em perat ur es s hould certainly b e controlled within 45 c Milling quality evalu at ion in s t atic co ndition resulted that using 50 and 60 0 c drying a ir temperature un der 10 min an d 20 min exposure time in each pass affected to the better h ead rice yie ld if co mp ared to drying with the higher air temperature (mor e th an 60 °c) and with the lon ger exposure time (more than 20 min). Furthermore, there were not any s i gn ifi cant difference in HRY at different portions of the co lumn under air temperature of 60 and 70 °c wi th the f i rst pass of 30 mi n exposure time a nd the IM C of 24% (w. b.) pa dd y. For t h e co mm erc ial rice dryer, the revolution of motor drove rotary d i scharge was se l ected at 850 , 990 and 14 00 rpm. w hi ch gave th e exposu r e t ime of 25 , 20 and 15 min. respectively. The dr y in g a ir temperature co uld use th e maximum of 120 °c with 25 min expos ur e t ime for t h e first p ass wh en IMC was above 23% (w. b.) a nd it s h o uld pe red u ce d a bout 10 -2 0 °c a nd a l so the expos ure time for the following pass. Finall y , the total cost of power cons umption for drying by the modified co lumn ar dryer was about 8 baht/ton-% of moisture re moval which was lower tha n the or i ginal design co lumn ar dryer (10.07 baht/ton-% of moisture removal). A thesis submitted in partial fulfillment of the requirement for the Degree of Master of Science. Thesis (M.Sc.) - Asian Institute of Technology, 1993 Rice Drying Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B16016 http://203.159.5.9/ait-thesis/detail.php?q=B16016 080598 20260818112850.0