الفهرس 
Fan power for aeration of grainOnly 14 pages are availabe for public view
 |  | from | 118 |  |  |
| | | from | 118 | | |
Abstract
The predicting of the static pressure DROP when a fluid flows through beds of grains and seeds has been given a great deal of interest for inany years. This is due to the fact that engineering information and data are required to make the right decision to choose fans or blowers as well as the proper systems for storage, drying, aeration and cooling of grains and seeds. In addition to, the energy requirements of the system could be calculated for any proposed operating conditions. The objectives of the present study are: 1- To study some of important physical properties of rough and white rice grains (varieties: Saltha 10 1 and Giza 178) and sunflower seeds (variety: Vidoc). 2- To study the effect of airflow rate (eight levels ranged from 58 1 to 987 m3/h.in2) and bulk density [four levels ranged fi-om 559 to 605 kg/m3 for rough rice (Salha 101) at moisture content of 12.82% (w.b.), from 542 to 5 88 ltg/m3 for rough rice (Giza 178) at moisture content of 12.59% (w.b.), from 839 to 880 kg/in3 for white rice (Saltha 10 1) at moisture content of 13.21% (w.b.) and from 826 to 867 kg/m3 for white rice (Giza 178) at moisture content of 13.07% (w.b.)] on the static pressure DROP in beds of rough rice and white rice grains. 3- To assess the relative differences in the resistance to airflow between rough and white rice grains at the same level of airflow rate and approximately the same level of moisture content. 4- To study the effect of airflow rate (eight levels ranged froin 58 1 to 987 m3/h.m2), bulk density (four levels ranged fiom 393 to 446 kg/m3) and moisture content (four levels ranged fiom 7.5 to 18.5%, wet basis) on the static pressure DROP in beds of sunflower seeds.