EXPERIMENTAL RESEARCH IN NATURE ON THE OPERATION OF THE "SHIMGE" PUMP INSTALLED AT THE "KATTAGAR" PUMP STATION ON THE BALANCE OF THE KARAKALPAKSTAN PUMP STATION MANAGEMENT

УДК 628.135

Abstract

The article examines the operational characteristics of the "Shimge" pump installed at the "Kattagar" pumping station, which is on the balance sheet of the Karakalpak Pumping Station Administration. Information has been collected regarding a facility on the balance sheet of the Karakalpakstan Department of Pumping Stations and Energy, where modern low-capacity pumps have been installed to replace SNPE 500/10 pumps. During the analysis of the "Shimge" pump at the "Kattagar" pumping station, tests were conducted on the PK-32 section of the channel; specifically, recommendations were developed for evaluating the efficiency and implementation of the "Shimge" pumping unit produced in China as an alternative to the SNPE 500/10 pumping unit. A method for measuring water discharge using a SONTEK S5 Doppler profiler with a GPS device was proposed, and the results were analyzed. Based on the analysis of measurement results, it was established that the water discharge capacity of the "SHIMGE" pumping unit is higher than the water discharge capacity of the SNPE 500/10 pumping unit, and electricity is saved 3 times. Furthermore, it will be possible to achieve more efficient use of the pumping station without observing the cavitation process occurring in the pumps.

Аннотация

В статье рассматриваются эксплуатационные характеристики насоса "Шимге," установленного на насосной станции "Каттагар," находящейся на балансе Каракалпакского управления насосных станций. Собрана информация об объекте, находящемся на балансе Каракалпакского управления насосных станций и энергетики, где вместо насосов СНПЭ 500/10 установлены современные насосы малой мощности. При анализе насоса "Шимге" на насосной станции "Каттагар" были проведены испытания на участке канала ПК-32, в частности, были разработаны рекомендации по оценке эффективности и внедрению насосного агрегата "Шимге" китайского производства в качестве альтернативы насосному агрегату SNPE 500/10. Предложен метод измерения расхода воды с помощью доплеровского профилятора SONTEK S5 с GPS-устройством, и результаты проанализированы. На основании анализа результатов измерений было установлено, что расход воды насосным агрегатом "ШИМГЭ" выше, чем расход воды насосным агрегатом СНПЭ 500/10, а электроэнергия экономится в 3 раза. Кроме того, можно будет добиться более эффективного использования насосной станции без наблюдения за процессом кавитации, происходящим в насосах.

Keywords: Pump, water flow rate, GPS device, Doppler profile, experimental, channel, pressure, unit.

Ключевые слова: Насос, расход воды, прибор GPS, допплеровский профиль, экспериментальный, канал, давление, агрегат.

Introduction

30-35 years ago, the annual volume of water used in our country was around 62-64 billion m³, but in recent years, due to global climate change, as well as problems with transboundary water use, the average annual amount of water used has decreased to 51-52 billion m³.[1]

Furthermore, approximately 60 percent of irrigated land is supplied with water by 1,688 pumping stations, with an average annual electricity consumption of 7-8 billion kWh; by 2030, the annual electricity demand of the republic's consumers is projected to increase from 74 billion kWh to 117 billion kWh, the population will reach 39 million by 2030, and their water demand will increase from 2.3 billion cubic meters to 2.7-3.0 billion cubic meters.[3]

More efficient and reliable operation of this complex and costly system, implementation of energy-saving measures at pumping stations, transition to green energy, and use of online monitoring devices for water discharged from pumping stations are considered topical issues of today.

Resolution of the President of the Republic of Uzbekistan No. PP-4486 dated October 9, 2019, provides for a reduction in electricity consumption at water management facilities by at least 10 percent through the introduction of effective methods for regulating the operating mode of pumping stations, and Chapter 6 of the "Concept for the Development of the Water Sector of the Republic of Uzbekistan for 2020-2030," approved by Decree of the President of the Republic of Uzbekistan No. UP-6024 dated June 10, 2020, provides for a reduction in annual electricity consumption at pumping stations within the Ministry of Water Resources system from 8.0 billion kWh to 7.0 billion kWh in 2025 and 6.0 billion kWh in 2030.[3],[4]

Resolution of the President of the Republic of Uzbekistan No. PP-5005 dated February 24, 2021, "On Approval of the Strategy for the Management of Water Resources and Development of the Irrigation Sector in the Republic of Uzbekistan for 2021-2023," which provides for the implementation of 124 projects in 2021-2023, has been developed.[2]

This completed scientific research work serves, to a certain extent, to implement the tasks defined in the regulatory legal documents related to this activity.

Therefore, this research work consists of studying and developing recommendations for the implementation of another pumping unit proposed as an alternative to a large number of existing pumping units.

The main goal of the research work is to study and develop recommendations for the implementation of the proposed SHIMGE pumping unit as an alternative to the 500/10 pumping unit.

This research project was carried out to study and develop recommendations for the implementation of the SHIMGE pumping unit, which is proposed as an alternative to the SNPE 500/10 pumping unit on the balance sheet of the Karakalpak Pumping Stations and Energy Department under the Ministry of Water Resources of the Republic of Karakalpakstan.

Materials and methods. During the implementation of the research project, the following main tasks were defined:

- Selection of one pumping station with a SNPE 500/10 pumping unit on the balance sheet of the Department of Pumping Stations and Energy under the Ministry of Water Resources of the Republic of Karakalpakstan and conducting measurement studies of the water flow rates of the pressure pipelines of the SNPE 500/10 units at the pumping station using a portable AFT-2000N laser water flow measuring device;

- determination and analysis of water flow rates in the supply and discharge channels of the selected pumping station using a SONTEK S5 Doppler profiler with a GPS device;[5]

- Comparison of the efficiency of the "SHIMGE" pumping unit produced in China as an alternative to the SNPE 500/10 pumping unit and preparation of analytical conclusions;

With the help of pumping stations on the balance sheet of the Karakalpak Pumping Stations and Energy Department under the Ministry of Water Resources of the Republic of Karakalpakstan, water is supplied for irrigation to 137,314 hectares of agricultural land in the Amudarya, Khojeyli, Takhiatash, Kanlykul, Shumanay, Kungrad, Muynak, Nukus, Kegeyli, Bozatau, Chimbay, Karauzyak, and Takhtakupyr districts.[6]

Selected pumping station and its brief description, conducted field experimental studies, and their results.

During the study, information was collected regarding facilities (pumping stations) on the balance sheet of the Karakalpakstan Department of Pumping Stations and Energy, where modern low-capacity pumps were installed instead of SNPE 500/10 pumps.

Specifically, at the "Kattagar Katlavan" pumping station in the Nukus district under the administration, a site where "SHIMGE" pumps were installed instead of SNPE 500/10 models was selected as the object of study (Figures 1.1).

Brief information about the selected research object:

The "Kattagar Katlavan" pumping station is located in the Nukus district of the Republic of Karakalpakstan. The "Kattagar Katlavan" pumping station is operated on the balance sheet of the Karakalpak Pumping Stations and Energy Administration. Two SNPE 500/10 pumps are installed at the pumping station. The discharge capacity of each pump is 500 liters per second. It is designed to operate on 110 kW of electricity per hour. The first unit of the pumping station was commissioned in 1973, and the second unit in 2018. The pumping station receives water from the PK-32 section of the Kattagar canal. The pumping station serves to supply water for irrigation. It supplies water for irrigation to a total area of 451 hectares.[7]

In addition to the installation of modern low-power pumps at these pumping stations, solar photovoltaic power plants were built and fully converted to alternative energy in order to transfer "green energy" (Figures 1.2-1.3).[8]

Figure 1.3. Brief description of the installed solar photovoltaic plant