MANUFACTURING AND PERFORMANCE EVALUATION OF A PROTOTYPE WOOD CHIPPING MACHINE TO PRODUCE MINI-CHIPS
Tawfk, M., El-Didamony, M. (2017). MANUFACTURING AND PERFORMANCE EVALUATION OF A PROTOTYPE WOOD CHIPPING MACHINE TO PRODUCE MINI-CHIPS. EKB Journal Management System, 34(4), 1511-1528. doi: 10.21608/mjae.2017.95815
M. A. Tawfk; M.I. El-Didamony. "MANUFACTURING AND PERFORMANCE EVALUATION OF A PROTOTYPE WOOD CHIPPING MACHINE TO PRODUCE MINI-CHIPS". EKB Journal Management System, 34, 4, 2017, 1511-1528. doi: 10.21608/mjae.2017.95815
Tawfk, M., El-Didamony, M. (2017). 'MANUFACTURING AND PERFORMANCE EVALUATION OF A PROTOTYPE WOOD CHIPPING MACHINE TO PRODUCE MINI-CHIPS', EKB Journal Management System, 34(4), pp. 1511-1528. doi: 10.21608/mjae.2017.95815
Tawfk, M., El-Didamony, M. MANUFACTURING AND PERFORMANCE EVALUATION OF A PROTOTYPE WOOD CHIPPING MACHINE TO PRODUCE MINI-CHIPS. EKB Journal Management System, 2017; 34(4): 1511-1528. doi: 10.21608/mjae.2017.95815

MANUFACTURING AND PERFORMANCE EVALUATION OF A PROTOTYPE WOOD CHIPPING MACHINE TO PRODUCE MINI-CHIPS

Misr Journal of Agricultural Engineering
Article 1, Volume 34, Issue 4, October 2017, Page 1511-1528  XML PDF (1011.86 K)
Document Type: Original Article
DOI: 10.21608/mjae.2017.95815
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Authors
M. A. Tawfk1; M.I. El-Didamony2
1Assist. Prof., Agric. Eng. Dept., Fac. of Agric., Zagazig Univ., Egypt.
2Lecturer, Agric. Eng. Dept., Fac. of Agric., Tanta Univ., Egypt.
Abstract
The oversize wood chips are existing in the conventional disc chipper production even with tuning the chipper settings which is not convenient to be used in the some applications that need to small sizes chips as biomass pellets or poultry litter for instances, hence there is an urgent need to produce mini-chips (MCHIPS) to become abundant for wide range of agricultural utilization within the farm. Thus, the present study aims to manufacture and evaluate the performance a local made prototype wood chipping machine by providing the conventional wood disc chipper with built-in swinging hammer mill and concave screen behind the cutting disc on the same rotating shaft using the pruning residues of mango trees to produce MCHIPS with high quality (uniform chips with minimum fines) and low energy requirement. The performance of the chipping machine was evaluated under operational variables including; three cutting rotational speeds of 750, 1000 and 1250 rpm corresponding to peripheral speeds of 17.66, 23.55 and 29.43 m/s, respectively, three cutting angles of 48°, 50°, 54° and 58°, three concave screen sizes of 12, 16 and 20 mm, where the hammers has the same rotational speed of the cutting disc. The machine performance was investigated taking into consideration the machine productivity, particle size distribution, and energy requirement. The results indicated that, it is recommended to use the prototype chipping machine at cutting speed of 1000 rpm (23.55 m/s), cutting angle of 58° and screen size of 16 m to obtain the best MCHIPS particle size distribution (MCHIPS ≤3 mm= 6.05 %, MCHIPS >3-8 mm= 24.07 %, MCHIPS >8-12mm = 39.95% and MCHIPS >12-16mm=29.93 %) to achieve regular MCHIPS with minimum fines at machine productivity of 1.40 Mg/h and consumed energy of 12.35 kW.h/Mg.
Keywords
Prototype chipping machine; wood disc chipper; hammer mill; pruning residues; mini-chips; machine performance
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