Editor’s pickGreen pump technology against the drought
In the Wala and Lib pumping stations, in addition to the multi-stage, axial split case pumps also ANDRITZ high-pressure pumps from the HP43 series are installed – due to their high efficiency, they have a strictly ecological orientation
As the fourth-driest country in the world, up to 92 per cent of Jordan is covered by deserts and desertlike landscapes. Due to these geographical conditions, water scarcity has become a permanent, natural state. The available capacity of renewable water resources in the region was 1857 cubic metres in 1967, and averages less than 566 cubic metres today. The value is expected to fall further in the near future, dropping to 90 cubic metres in 2025 – signifi cantly below the generally accepted limit of 500 cubic metres of water per person per year.
REORIENTATION OF WATER MANAGEMENT
The sustainable optimisation of water supply has become a long-term project through its adoption into the Kingdom’s national strategy and agendas. The implementation of the “Water Sector Capital Investment Plan 2016 – 2025” is currently underway. The objectives of this initiative are to secure and improve water supply, develop new water resources to increase capacity, and expand wastewater services.
For this, the partly inadequate distribution systems are extensively renovated and modernised. This will form the technical basis for more comprehensive and sustainable management of water resources in the future in order to meet the needs of a growing population over the next ten years.
An essential part of creating a sustainable water management is the reduction of energy consumption by the water sector. Currently, the Jordanian system requires about 15 per cent of the energy produced. This corresponds to about 2,000 GWh per year. A major part of this can be attributed to the pumping of water. This inefficiency not only results in high costs, but also in increased CO2 emissions. Based on a joint study with the German Association for International Cooperation, it was found that the annual energy-saving potential of 25 pumping stations would amount to 42 GWh per year. This would not only mean a reduction of up to 33 per cent, but also a reduction in CO2 emissions to over 30,000 tons a year. For the implementation of the results of the study, fi ve pumping stations were selected as pilots for the period 2016-2020.
OPTIMISATION OF THE PILOT BASIS
These include, among others, the pumping stations Wala and Lib near Madaba. Built-in the 1990s, the two facilities supply 184,000 people in the city and the surrounding area from the Madaba Reservoir. While Wala transports 1,500 cubic metres of water per hour to Madaba over a distance of 2.6 kilometres, Lib delivers 1,500 cubic metres over a distance of 17 kilometres.
In 2015, these two plants were selected as pilots for the installation of new energy-efficient pumping systems, as they have a common supply source and a controllable distribution system with Heedan Wellfield. For this purpose, the previous five pumps in each station were replaced by four newer models, and a monitoring and control system was installed.
In 2017, the Jordan Water Company (Miyahuna) and Water Authority decided to increase the amount of water supplied from Heedan Wellfield to meet an increased demand for water in Amman, and in 2018 six new high-efficiency pumps were installed to increase the total flow of the pump station Lib to 2,500 cubic metres per hour.
These highly efficient pumps have achieved very good results since being put into operation. The new system is expected to deliver energy savings of up to 20 per cent and savings of 313,000 Jordanian dinars, which corresponds to roughly 440,000 US dollars (SGD 601,048).
The ANDRITZ multi-stage, axial split case pumps are designed to customers’ specific requirements. The multi-stage impeller arrangement can be combined in different ways to fulfil different application needs
THE PUMP EXPERT
ANDRITZ was awarded the contract to refurbish the two stations with a total of 12 pumps by the end of 2018. These included six high-pressure pumps from the HP43 series and six multi-stage, axially-split case pumps from the ASPM series.
The ANDRITZ multi-stage, axial split case pumps are highly engineered pumps designed to customers’ specific requirements and features a multi-stage impeller arrangement that can be combined in different ways to fulfil different application needs. In addition, the machine is calculated and designed to withstand all load cases which might occur during the lifetime of the pump.
Peak outputs of up to 40 MW, flow rates of up to 10 cubic metres per second and a cost-effective construction using barrel casings make this technology particularly effective. The axial split design is maintenance-friendly even at high heads of up to 1000 metres.
In the Wala and Lib pumping stations, ANDRITZ high-pressure pumps from the HP43 series were installed in addition to the multi-stage, axial split case pumps. Due to their high efficiency, they have a strictly ecological orientation. The modular machine is offered in both horizontal and vertical design and can be gradually expanded as needed. Suction and discharge nozzles can be arranged variably depending on the intended use. With nominal sizes of 40 to 200 millimetres, it reaches delivery rates of up to 850 cubic metres per hour at up to 40 bar discharge pressure in the first expansion stage, and even up to 63 bar in the second stage.
“The exceptionally high efficiency, quality and best lead time were among others the main factors for us and our pumps being chosen over the previous supplier. We are more than happy and proud to support Jordan with our hydraulic machines in these pumping stations. We are keen to take on and solve further challenges to support the overall development of sustainable and energy-efficient water supply and management system in the Kingdom,” stated Muhammad Abou Daoud, sales manager for the Middle East.
*Article can be found in Water & Wastewater Asia Jul/Aug 2019 issue