Increase of energy efficiency of mine fans work on a mine vent network

Tetiana Bunko,Anatolii Belikov,Oleksandr Bokii,Maksym Shyshov,Oleksandr Zhalilov,Ivan Kokoulin,A Bulat,Y Kryzhanivskyi,V Heyets,B Liu,O Voloshyn

doi:10.1051/e3sconf/201910900012

Abstract

The increase of energy efficiency of main fans (MF) work is the basic condition of perfecting the mine ventilation system. During realization of multi-fan ventilation there is the non-productive «overbalancing» of vent flow from a weaker towards more powerful ventilator which causes decline of work efficiency of both. The questions of reducing the MF mutual influence on the outgoing air flow and increasing the aerodynamic quality of vent network have been studied and considered insufficiently. It is proposed to use the method of calculating the effective MF operating conditions taking into account the mutual influence of MF and areas-users of fresh air in mine ventilation network and on the basis of criterion of estimating the MF mutual influence, which will allow to enhance the energy efficiency of mine ventilation and labour safety of subsurface miners.

Highlights

The main fans (MF) are the basic users of electric energy in a mine – they consume 25 % and more of mine’s general power consumption
In spite of considerable successes in creating the MF with excellent stand aerodynamic parameters, in practice the efficiency of majority of them is considerably lower than normative values
It is caused by the features of the technological loading of turbomachines, determined by aerological parameters of modern mine vent networks (MVN)

Summary

Introduction

The main fans (MF) are the basic users of electric energy in a mine – they consume 25 % and more of mine’s general power consumption. In spite of considerable successes in creating the MF with excellent stand aerodynamic parameters, in practice the efficiency of majority of them is considerably lower than normative values. It is caused by the features of the technological loading of turbomachines, determined by aerological parameters of modern mine vent networks (MVN). Their topology and aerodynamic parameters change continuously resulting in failure of the MF to work within the operative norms. Electric power consumed for mines ventilation depends on the amount of MFs, their working modes, their mutual influence on output airflow, quality of vent network, efficiency rate of using the supplied air and a number of other factors in a mine

Methods

Results

Conclusion