Abstract An experimental radial-flow, circular bin dryer with a dehumidifier was fabricated and t... more Abstract An experimental radial-flow, circular bin dryer with a dehumidifier was fabricated and tested for rough rice drying. Results showed that high-moisture paddy could be dried to 14% moisture content (wet basis) over a 24 h drying span at an average drying rate of 0.5%/h. The open-cycle system's specific moisture extraction rate and the dehumidifier's coefficient of performance were within the usual range of values cited for similar conventional systems or equipment. The quality of the dehumidifier-dried and naturally dried paddy was similar with respect to minimum grain Assuring, The system was found to be a technically feasible, more energy-efficient and safer alternative to electrical resistance heating in the conditioning of ambient air for drying under humid tropical conditions.
ABSTRACT A rotary drum dryer prototype was designed, fabricated and tested to combine convection ... more ABSTRACT A rotary drum dryer prototype was designed, fabricated and tested to combine convection drying with conduction heating of paddy to increase moisture reduction rates. Ambient air forced inside the drum counter-flow to the direction of the cascading grains brought about “dryeration” of the hot grains, resulting in cooler grain output and increased moisture reduction rates. Its partial drying capacity doubled that of the benchmark pre-dryer at 5 rpm drum speed and quadrupled at 7 rpm, requiring only a single-pass operation. Tests using freshly harvested and re-wetted paddy showed that partial drying capacity, final moisture content and moisture reduction rate were all significantly affected by counter-flow air velocity, Its overall thermal efficiency was also 50% higher.
The study investigated the use of thermal modification to improve physico-mechanical properties a... more The study investigated the use of thermal modification to improve physico-mechanical properties and decay resistance of Malapapaya [Polyscias nodosa (Blume) Seem.] wood. Results showed that wood properties were altered with exposure to high temperature and long treatment duration. Wood color changed from light yellowish brown to very dark brown with increasing treatment temperature. No defects due to heat treatments were observed. Treatments resulted in improved dimensional stability as indicated by the reduction in water absorption and thickness swelling of treated materials. Decay resistance against white rot [Fomes lividus (Kalchbr.) Sacc] and brown rot [Lenzites striata (Swartz ex Fries)] fungi improved significantly at the highest treatment combination of 220º C-120 minutes. Mechanical properties as measured by modulus of rupture and toughness were significantly reduced.
... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) durin... more ... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) during drying. Drying Tech. , 18(1&2): 295310. ... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) during drying. Drying Tech. , 18(1&2): 295310. ...
Thin layer convection drying was performed on osmotically pre-dried young coconut, strips, both t... more Thin layer convection drying was performed on osmotically pre-dried young coconut, strips, both thin and thick. A drying air temperature range of 50–70°C and an airflow of 0.25 m s was used to dry samples soaked in three sugar solution concentrations (40, 50, and 60°B) during the osmotic drying phase, with the convection drying alone serving as control. An analysis of variance
... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) durin... more ... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) during drying. Drying Tech. , 18(1&2): 295310. ... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) during drying. Drying Tech. , 18(1&2): 295310. ...
Abstract An experimental radial-flow, circular bin dryer with a dehumidifier was fabricated and t... more Abstract An experimental radial-flow, circular bin dryer with a dehumidifier was fabricated and tested for rough rice drying. Results showed that high-moisture paddy could be dried to 14% moisture content (wet basis) over a 24 h drying span at an average drying rate of 0.5%/h. The open-cycle system's specific moisture extraction rate and the dehumidifier's coefficient of performance were within the usual range of values cited for similar conventional systems or equipment. The quality of the dehumidifier-dried and naturally dried paddy was similar with respect to minimum grain Assuring, The system was found to be a technically feasible, more energy-efficient and safer alternative to electrical resistance heating in the conditioning of ambient air for drying under humid tropical conditions.
ABSTRACT A rotary drum dryer prototype was designed, fabricated and tested to combine convection ... more ABSTRACT A rotary drum dryer prototype was designed, fabricated and tested to combine convection drying with conduction heating of paddy to increase moisture reduction rates. Ambient air forced inside the drum counter-flow to the direction of the cascading grains brought about “dryeration” of the hot grains, resulting in cooler grain output and increased moisture reduction rates. Its partial drying capacity doubled that of the benchmark pre-dryer at 5 rpm drum speed and quadrupled at 7 rpm, requiring only a single-pass operation. Tests using freshly harvested and re-wetted paddy showed that partial drying capacity, final moisture content and moisture reduction rate were all significantly affected by counter-flow air velocity, Its overall thermal efficiency was also 50% higher.
The study investigated the use of thermal modification to improve physico-mechanical properties a... more The study investigated the use of thermal modification to improve physico-mechanical properties and decay resistance of Malapapaya [Polyscias nodosa (Blume) Seem.] wood. Results showed that wood properties were altered with exposure to high temperature and long treatment duration. Wood color changed from light yellowish brown to very dark brown with increasing treatment temperature. No defects due to heat treatments were observed. Treatments resulted in improved dimensional stability as indicated by the reduction in water absorption and thickness swelling of treated materials. Decay resistance against white rot [Fomes lividus (Kalchbr.) Sacc] and brown rot [Lenzites striata (Swartz ex Fries)] fungi improved significantly at the highest treatment combination of 220º C-120 minutes. Mechanical properties as measured by modulus of rupture and toughness were significantly reduced.
... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) durin... more ... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) during drying. Drying Tech. , 18(1&2): 295310. ... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) during drying. Drying Tech. , 18(1&2): 295310. ...
Thin layer convection drying was performed on osmotically pre-dried young coconut, strips, both t... more Thin layer convection drying was performed on osmotically pre-dried young coconut, strips, both thin and thick. A drying air temperature range of 50–70°C and an airflow of 0.25 m s was used to dry samples soaked in three sugar solution concentrations (40, 50, and 60°B) during the osmotic drying phase, with the convection drying alone serving as control. An analysis of variance
... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) durin... more ... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) during drying. Drying Tech. , 18(1&2): 295310. ... Prado, MET, Alonso, LFT and Park, KJ 2000. Shrinkage of dates (Phoenix Dactilyfera, L.) during drying. Drying Tech. , 18(1&2): 295310. ...
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