| Popis: |
In order to determine the best recommendations for seed cotton dryer temperature control as part of ASABE standard S530.1, 20 tests were conducted during the ginning seasons of 2007, 2008, 2009, and 2010 to measure air temperature variation along various heated air seed cotton drying systems. The cooperating cotton gins were located in Texas, Arizona, New Mexico and the San Joaquin Valley, California. Drying systems tested included: standard tower, short tower, hot shelf, crossflow, hi-slip, pipe, hot box, fountain, and collider systems. Temperature measurements were taken over a 2-h time period at the mixpoint and every 2 m (6.5 ft) after the mixpoint. Although there was a significant correlation between mixpoint temperature variation and distance of the primary temperature control sensor from the mixpoint, the sensor location recommendations of ASABE standard S530.1, Temperature Sensor Locations for Seed-Cotton Drying Systems, appear to be satisfactory for seed cotton drying systems with well-maintained burners and well-adjusted temperature controls. All systems, except for the hot shelf dryer, had a larger temperature drop in the first 2 m (6.5 ft) after the mixpoint than occurred in the remainder of the drying system. Thus, for all but the hot shelf dryer, locating a temperature control sensor at 2 m or more past the mixpoint would achieve satisfactory temperature control. |
