AERODYNAMIC ANALYSIS AND PERFORMANCE EVALUATION OF RICE MILLING MACHINE

Morad, M. M.; Badr, M. M.

doi:10.21608/mjae.2013.100418

AERODYNAMIC ANALYSIS AND PERFORMANCE EVALUATION OF RICE MILLING MACHINE

Document Type : Original Article

Authors

M. M. Morad ¹
M. M. Badr ²

¹ Prof. and head of Agric. Eng. Dept., Fac. of Ag., Zagazig Univ. Egypt.

² Lecturer of Agric. Eng., Fac. of Ag., Zagazig Univ. Egypt.

10.21608/mjae.2013.100418

Abstract

Experiments were carried out to derive aerodynamic analysis and evaluate the performance of a rice milling machine. Physical and engineering properties of grains under study have to be considered to study their effect on the performance of the milling machine. The performance of the milling machine was studied under the following parameters: feed rate, drum speed, concave clearance and seed moisture content. Performance evaluation of the machine was carried out in terms of overall machine efficiency, total grains losses, machine productivity, required power, specific energy and criterion cost. The experimental results reveal that the highest values of machine productivity and overall machine efficiency were 925 kg/h and 92.38%, while the lowest values of required power and specific energy were 9.2 kW and 11.95 kW.h/Mg, furthermore the lowest values of both operational and criterion costs were 9.15 L.E./ Mg and 48.05 L.E./ Mg, respectively. The optimum operating parameters of milling machine were found at 10 m/s air velocity by using 1.4 Mg/h feed rate with 10 mm concave clearance and 850 rpm drum speed at 16 % grain moisture content.

Main Subjects

Agricultural Power and Machinery Engineering

References

Abdel-Maksoud S. E; M. M. Morad and T. Z. Foda (1995): Study on some different parameters affecting the efficiency of rice milling. Misr J. Ag. Eng. 12(4): 765-780.

Arora, S. (1991): physical and aerodynamic properties of rough rice (oryza sativa). Indian journal of agricultural engineering 1 (1): 17-22.

Awady, M. N. (1978): Tractor and farm machinery. Text book, Faculty of Agriculture, Ain-Shams University. Pp: 164-167.

Awady, M. N; E. Y. Ghoniem, and A. I. Hashish (1982): Agriculture comparison between wheat combine harvesters under Egyptian conditions. Res. Bul. Ain-Shams Univ.:13p.

Firouzi, S. and M. R. Alizadeh (2011): Effect of whitener type and paddy moisture content on rice grain damage during milling process. American-Eurasian Journal of Agricultural & Environmental Sciences, 10 (3): 470 - 474.

Firouzi, S; M. R. Alizadeh and S. Minaei (2010): Effect of the size of perforated screen and blade-rotor clearance on the performance of Engleberg rice whitener. African Journal of Agricultural Research, 5 (9): 941-946.

Helmy, M. A. (1995): Effect of milling time on rice milling proces. Misr J.Ag. Eng., 12(1): 252-266.

Kenghe, R. N. (2006): Effect of milling machinery on milling quality of rice. Journal of Maharashtra Agricultural Universities, 31 (1): 131-132.

Klenin, N.I.; I.F. Popov and V.A. Sukun (1985): Agricultural machines. Theory of operation, computation of controlling parameters and the conditions of operation. Amerind publishing Co. PVT. Ltd., New Delhi.

Koide, S. and Y. Nishiyama (2001): Studies on abrasive rice milling (Part 2) - Milling power model and milling energy model. Journal of the Japanese Society of Agricultural Machinery, 63 (6): 63-67.

Radwan, S. M. (2001): The potential energy consumption for milling some Egyptian rice varieties. Misr J. Ag. Eng., 18(3): 537-551.