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Browsing by Subject "pumping costs"

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    Item type:Article, Access status: Open Access ,
    Energy consumption analysis of the main dewatering pumps in underground mines
    (Wydawnictwa AGH, 2021) Michlowicz, Edward; Wojciechowski, Jerzy
    Mine dewatering is one of the main tasks and problems in the mining sector which do not affect output directly but are necessary for correct mine operations. The main dewatering pumps are located at various levels, but the pumping head is always a few hundred metres underground. The number and operating time of the pumps depends on the water inflow and are specified in the applicable regulations. Due to the capacity and required head, the power demand may well be in excess of 1 MW. Consequently, the correct use of main dewatering pumps, at low energy consumption, is a basic condition of limiting water pumping costs. The analysed pumping station is located at level 500, is equipped with ten Q = 500 m$^{3}$/h (0.139 m$^{3}$/s) OW-250/8 pumps. The operating time of most pumps exceeds 20 000 h and the energy consumption is from 2.17 to 2.67 kWh/m$^{3}$ of pumped water. The analysis results and the energy consumption ratios have been compared with the data for new pumps which operate at data sheet parameters (efficiency). This was the basis to evaluate the impact of exceeding the time between repairs on operating parameters and the increase in the operating costs of the main dewatering pumps.