Abstract
An increase in fuel usage efficiency is the path to eliminate environmental impact, decrease greenhouse gas emissions, and prevent climate warming. Coal-water fuel (CWF) is seen as a replacement for coal and heavy oil in some applications but it has a number of disadvantages that must be addressed before it can be gasified or burned. Pretreatment (or activation) is one of the methods for improving the fuels. Since CWF is an electrically conductive substance, the electromagnetic field can be used for various types of influences: heating, stirring by rotation, etc. Numerical research was carried out to study the possibility of simultaneous heating and movement of CWF by a rotating electromagnetic field created in the stator of an asynchronous electric motor. The correlations between the required electromagnetic field parameters and tangential velocity profile were investigated. It was found that a change in the position of the maximum tangential velocity with increasing rotation speed can lead to a decrease in magnetic reluctance and, consequently, to a decrease in the active power required to rotate the CWF.
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