Comparison of Conventional Induction Motor-Pump System with One Containing a Variable Frequency Drive: A Quantitative Performance Analysis in Low-Voltage Conditions

Water and energy crises are major challenges in many places of the world. The lack of drinkable water is often intensified in arid regions. Fortunately, this is generally accompanied with abundant sources of solar energy which can be used to drive desalination and water treatment systems. Solar powered humidification-dehumidification desalination systems (HDH) have attracted much attention in recent years [1-5]. The basic idea of solar-driven HDH systems is that when hot salt water is exposed to hot dry airflow, a specific quantity of vapour can be extracted by the dry air. Fresh water is retrieved by humid air condensation in a cooling coil in the dehumidifier section. Thus, the basic components of HDH cycle include a heat source, air humidifier and dehumidifier. Nafey [6] carried out an experimental investigation of HDH processes using a solar water heater and a solar air heater to heat the water and the air streams, respectively. Air humidification was carried out using an induced fan cooling tower. Orfi [7] presented a theoretical study of a HDH solar desalination system. The seawater was preheated in the dehumidification condenser and then heated in the solar collector before entering the humidification chamber. Antar [8] experimentally investigated an air-heated HDH desalination system with single-and two-stage heat recovery systems.

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“…Since the supply frequency is 50 Hz, Eq. 7is used to determine the synchronous speed for the 2-pole machine [19]:…”

Section: Solar Field Pumpmentioning

confidence: 99%

“…Hence, the value of k in (6) is found to be 1.29 × 10 −5 N m s 2 . This value of k is multiplied with the square of the rotor speed and fed back to the torque input of the motor, to create the model for a centrifugal pump type load [19].…”

Section: Solar Field Pumpmentioning

confidence: 99%

Modelling and control of solar-driven humidification–dehumidification desalination plant

Gabra

Rady

Ghany

et al. 2019

Journal of Electrical Systems and Inf Technol

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Analysis of the Operation of Pumping Unit Under a Range of Different Loads

Димитрова¹

2019

ICTTE

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The report analyzes the work of a pumping unit from the hot water installation of the Faculty of Technics and Technologies - Yambol, Bulgaria, under different load conditions. Simulation stands have been adapted that are suitable for analyzing the performance of motors of different types and depending on how they are put into the pump unit. It was found that when the energy inefficient electric motor is directly started, the maximum efficiency is 79,63% and is achieved at 100% of its load. When using a frequency converter, at 100% of its load, the efficiency is 86,83%. The proposed energy-efficient electric motor, with direct start-up, has the highest efficiency of 86,7%. The obtained results can be used in the modernization of the hot water installation of the Faculty of technics and Technologies - Yambol, in the part “pumping units”.

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Comparison of Conventional Induction Motor-Pump System with One Containing a Variable Frequency Drive: A Quantitative Performance Analysis in Low-Voltage Conditions

Cited by 2 publications

References 1 publication

Modelling and control of solar-driven humidification–dehumidification desalination plant

Modelling and control of solar-driven humidification–dehumidification desalination plant

Analysis of the Operation of Pumping Unit Under a Range of Different Loads

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