02381cas a2200253 a 450000500170000000800410001703500150005810000230007324500610009626000520015730000100020949000270021950001560024650200580040252012810046065000170174170000380175870000550179670000460185171000640189771000420196181000590200385600650206220260818171455.0110910s1985    th uu|m rtt   0|  a1eng d  a.b104945221 aHalos, Leonides S.10aPerformance analysis of an IRRI natural convection dryer  aBangkok :bAsian Institute of Technology,c1985  a64 p.1 aThesis ;vno. AE-85-17  aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development  aThesis (M.Eng.) - Asian Institute of Technology, 1985  aThis study describes the design and performance  characteristics of an IRRI natural convection dryer based on  initial observations and measurements made .  The performance of the dryer was evaluated in terms of:  1) air temperature and flow patterns in the dryer, 2) the drying  rates of paddy of different initial moisture contents (20, 24, 28  per cent, wb) at temperatures of 40+2 C and 50+2 C in 10 and 15  cm thick columns, and 3 ) milling quality of the-dried paddy.  Drying paddy at 50 C gave a faster drying rate practically  for each column thickness at all levels of initial moisture  content. Comparison with shade drying as control showed that  paddy drying was faster even with the least favorable combination  of the experimental variables. Statistical analysis revealed that  the column thickness gave the highest correlation effect on  the drying rate of convection- dried paddy.  The combined effects of the drying variables significantly  affected the head rice recovery. But this was within a limit  comparable to the head yields obtained from the shade- dried  paddy . The effect of the drying air temperature and initial  moisture content recorded was significant with a decrease in the  head rice yield at higher temperature and when paddy is rewetted . 0aRicexDrying1 aJindal, Vinod Kumar,eChairperson1 aIllangantileke, Sarath G., eExamination Committee1 aCochran, Billy J., eExamintion Committee2 aThe Federal Republic of Germany (DAAD), eScholarship Donor1 aInternational Rice Research Institute2 aAsian Institute of Technology.tThesis ;vno. AE-85-17  3Full-Textuhttp://203.159.5.9/ait-thesis/detail.php?q=B19940