COUNTER-ROTOR PUMPS AND OTHER TYPES OF PUMPS: A COMPARATIVE ANALYSIS OF EFFICIENCY

Abstract

Pumping equipment is a crucial element of many industrial and municipal systems, ensuring the transportation of liquids. Its efficiency directly affects the productivity of technological processes, energy consumption levels, and economic costs, making the selection of optimal pumping equipment a critically important task. Pumps can significantly impact overalloperational efficiency, as their operating costs constitute a substantial portion of total energy expenses. That is why it is important to choose equipment that provides high efficiency, low energy consumption, and optimal performance. Different types of pumping equipment have their design features that determine their efficiency in specific operating conditions. One of the most common types of pumps used in industrial processes is the multistage pump of the CNS type. Multistage pumps of the CNS type are used for transferring liquids under high pressure. Console pumps, on the other hand, stand out for their compactness and simple design. Counter-rotor pumps, unlike the previous two types, have a unique design that combines the advantages of both multistage and cantilever pumps. Due to their special structure with two oppositely rotating impellers, they can provide a high head comparable to CNS-type pumps while maintaining the compact dimensions characteristic of cantilever pumps. This allows them to be used insituations where reducing the size of the pumping equipment is necessary without sacrificing efficiency. This study presents a detailed analysis of the efficiency of different types of pumping equipment, specifically multistage CNS-type pumps, cantilever pump, and counter-rotor pump. The analysis is based on energy consumption and material intensity indicators, which enable a comprehensive evaluation of the operational and structural characteristics of the studied pumps. The research allows for an assessment of the advantages and disadvantages of each type of pumping equipment. The obtained results will help determine the feasibility of using counter-rotor pumps compared to other types of pumps, as well as evaluate their technical and economic aspects.