Question

Comminution processes are typically not very energy efficient. Its been approximated that only 1 % of...

Comminution processes are typically not very energy efficient. Its been approximated that only 1 % of the energy input is utilized to create new surfaces. Where goes the rest?

Engineering   Chemical-Engineering   
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Answer #1

The efficiency is calculated based on surface energy of larger particale to surface energy of the broken or comminuted particle,which is essentially less than 1 % in general.

Rest of energy goes to produce heat due to friction between the particle-particle , particle-equipment parts ,equipment parts -equipment parts, deformation of particles,deformation of equipment parts.These effects reduces efficiency of comminution process,which goes in heating the environment ,particles and the process equipment itself,that is why many times they are attached with liquid coolent to remove heat.

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