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In order to assist in the economic evaluation of the performance of the present work, mechanical power consumed in rotating discs was measured experimentally under different conditions by means of a watt meter. Table 2 shows the following results:

  1. power consumption increases with increases disc rotational speed;

  2. power consumption increases with degree of roughness.

Table 2

Mechanical power consumption at different degrees of roughness

 Degree of roughness, mm
1234 
rpmPower consumption, WFlat disc
100 279 287.8 295 302 153 
200 290 304 312.6 322.4 164 
300 306 319 328.4 334.1 172 
400 323 334 340.9 350.5 180 
500 345 350 357 362.1 189 
 Degree of roughness, mm
1234 
rpmPower consumption, WFlat disc
100 279 287.8 295 302 153 
200 290 304 312.6 322.4 164 
300 306 319 328.4 334.1 172 
400 323 334 340.9 350.5 180 
500 345 350 357 362.1 189 

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