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

Table 5

Experimental layout using an 𝐿₉ (3⁴) orthogonal array.

Sl. no.	Stirrer speed in rpm	Stirrer location from free surface in mm	D/d ratio	C-w ratio
1	100	27.5	4.0	40
2	100	55	2.0	50
3	100	82.5	1.3	60
4	200	27.5	2.0	60
5	200	55	1.3	40
6	200	82.5	4.0	50
7	300	27.5	1.3	50
8	300	55	4.0	60
9	300	82.5	2.0	40