Experimental Determination of Heat Transfer Coefficient in Stirred Vessel for Coal-Water Slurry Based on the Taguchi Method

Table 3

Factors and their specified levels.

Sl. no.	Variables	Levels
		I	II	III
1	Stirrer speed in rpm	100	200	300
2	Stirrer location from free surface in cm	27.5	55	82.5
3	D/d ratio	4.0	2.0	1.3
4	Coal-water ratio	40 : 60	50 : 50	60 : 40