Complex Approach to Conceptual Design of Machine Mechanically Extracting Oil from Jatropha curcas L. Seeds for Biomass-Based Fuel Production

Table 5

Engineering characteristics determined by analysis of physical and mathematical models.

Engineering characteristic	Unit
Friction between the wall of the chamber and the seed	—
Surface friction between the tool and the seed	—
Angle between the longitudinal axis of the seed and the surface of the tool	°
Compressive stress during pressing ripe seeds	MPa
Compressibility	MPa^−1
Compressive force for pressing seeds	kN
Volume compressive energy
Average diameter of the solid particles in the oil	m
Degree of degradation of the oil	Mw