Facing the worst drought on record in the Colorado River Basin, as lake levels continue to fall, the Southern Nevada Water Authority (SNWA) is building a low lake level pumping station to ensure Las Vegas and Southern Nevada maintains access to its primary water supplies in Lake Mead.
Lake Mead water levels have dropped more than 131 feet (40 meters) since the drought began in 2000. The new pumping station will allow SNWA to pump water from Lake Mead from an elevation as low as 875 feet (267 meters) above sea level into the water treatment facilities and further on to provide water to the city of Las Vegas and neighbouring communities.
Development of the pumping station consists of constructing a 315-inch diameter access shaft at more than 498 ft. depth. At the bottom of the access shaft, a 12,379 sq. ft. underground cavern is excavated. The cavern, known as a fore bay, will connect with 34 vertical shafts — each 498 feet deep and 72 inches in diameter — to accommodate the station’s 34 submersible motor pump sets. Thirty of these pump sets will be manufactured and installed by Indar.
So far, 20 low lift submersible motor pump sets (LLP) plus 10 high lift submersible motor pump sets (HLP) will be delivered by Indar.
Maria Elena Rodríguez, Water Engineering Director at Indar, explains, “The drop of Lake Mead enables wells to be drilled down in order to access those deep water reservoirs…making a traditional vertical turbine solution unfeasible to operate reliably at those depths”.
Each of those 30 Indar pumps is rated at 20,835 US gallons per minute with 433 ft. and 695 ft. of head, respectively, providing a total capacity at the pumping station of more than 900 MGD (million gallons per day). “These are more than 250 bath tubs every second” illustrates Dirk Wulf, a Project Manager at Indar.
The pumps are operated through submersible motor pump sets with 13,800-volt motors, ranging from 3,150 HP through 5,200 HP. These pump sets will obtain the required energy right from the hydro power plant at the nearby Hoover Dam. The pumps, motors, riser pipes, and well heads are made of stainless steel 316/316L in order to guarantee a long service life and to reduce the impact of the water.
In order to test the pumps and motors on full load performance, Indar has built an additional test lab 98.4 ft. deep and 158 x 197 inches wide. This $2 Million Euro investment enables Indar to guarantee the highest performance standards and a lead production schedule in order to fulfil the tight project schedule for SNWA. “Since the motor pump sets need to be ready for start-up by April 2020, we gain now the time which we had invested into the new test lab” states Jon Alberdi, General Manager of Indar Pump Division.
From the fore bay, the water will be pumped to SNWA’s water treatment facilities. The high-volume low lake level pumping station, combined with the recently completed Lake Mead Intake No. 3, will provide the community continued access to its primary water supply even as lake levels fluctuate as a result of the ongoing drought.
The design and construction cost of the Lake Mead Intake No.3 is expected to total approximately $650 million, and L3PS is on track to be operational by 2020.
“We are aware of our responsibility to enable 2 million people and an uncountable number of visitors to have their shower every morning, to have a reliable source of water and quality of life” declares Wulf. “We have considered every single detail in order to make this pumping station to be one of the most advanced and efficient pumping station in the world.” It is one of the largest already.
submersible motor pump sets
With this achievement, Indar reinforces its position as a leading engineered solutions provider for demanding water supply projects. Municipal water authorities, utilities, and engineering companies who have partnered with Indar have received comprehensive support from Indar’s “one-stop-shop”, gaining easily installed motor pump sets, efficient pumping, high performance, and more efficient water use.
Digital Displacement pump technology
Most hydraulic machines today have the same basic control mechanism that was first patented in 1893. The variable-angle swash plate pump has been a reliable way to transmit fluid power for over 120 years. Efforts have been made to digitize the mechanism with feedback and electronic control, but the underlying principle has limited benefits.
Our Digital Displacement® pump technology is a natively digital hydraulic innovation. It utilizes a radial piston machine which enables and disables cylinders in real time, using ultra-fast mechatronic valves.
The intelligent, digital controls mean a digitally-enabled machine is highly controllable and extremely efficient. The net result is:
- Dramatically lower energy losses (typically less than a third of swash-plate machines)
- Dramatically faster response (typically ten times faster)
- Reduction of annoying, high-frequency noise
Individual cylinders are only called into action when required to meet the load demanded, resulting in a pump with efficiency over 90 percent. The control of individual cylinders allows a single pump to have multiple independently-controllable services providing system innovators a platform to invent new architectures to unlock the capabilities of digital hydraulics.
By replacing a mechanical or hydraulic device with one which is electronically and digitally controlled, new possibilities of flow metering, response, system control, diagnostics (self-healing) and automation are now possible. The pump is able to create real time data for live streaming via telematics.
Danfoss advanced off-road demonstrators are showing radical improvements in efficiency and controllability. In multiple field tests, the original axial piston pump was replaced by a Digital Displacement® pump as a simple pump upgrade. Benchmarking to a conventional 16-tonne excavator, fuel consumption on a standard work cycle was reduced between 16 and 21 percent, whilst at the same time, productivity was increased by 28 percent.
At Danfoss Digital Displacement we aim to make the complex, simple, to re-imagine your machine to be optimized and differentiated unlike any on the market. Owned by Danfoss and developed in Scotland over the last 25 years, digital hydraulic technology delivers productivity, response and efficiency that cannot be replicated elsewhere in the market.
Green efficiency in Dublin’s Central Bank
High performance, long-lasting sustainability and energy efficiency: The central bank campus in dublin unites these three aspects. Located in north wall quay in Dublin Ireland, the modern building provides a state-of-the-art workplace, facilitating open communication and promoting teamwork at every level. Germany-based technology expert Wilo has equipped the new campus with green pumps, and thus contributes to the building’s environmental efficiency.
The Dublin Docklands is spread over 520 hectares north and south of the Liffey. High employment prospect possibilities have attracted people and businesses since the late 18th century. What used to be a landscape of ship funnels, cranes, pubs and stables, has been transformed into a gleaming, modern business hub due to urban regeneration over the past years. North Wall Quay is located on the northern side of Dublin, including the International Financial Services Centre (IFSC). Since 2017, the new headquarters of the Central Bank of Ireland have been located here. The sculptural profile of the new building reflects the maritime setting and new civic identity of the Dockland area. The building is wrapped in a glass skin, which is shielded from glare and solar heat gain by an outer layer of anodized aluminium triangular mesh panels. Those panels contribute significantly to the overall energy performance by reducing the impact of solar heat and thus also reducing the energy needed for heating and cooling. The façade is broken down into a number of elements: a double glazed unitised inner skin, an outer solar shading skin, the unique glazing system and a rain screen cladding. North Wall Quay is the first office building in Ireland to achieve the Building Research Establishment’s Environmental Assessment Method (BREEAM) ‘Outstanding’ rating at design stage. The building energy rating (BER) is targeted to A2, which equates to a 72 % improvement in energy consumption over previous building regulation baselines. Effective insulation also reduces the energy consumption, the environmental impact is held on a low level by using energy from renewable sources. Annual energy savings according to the BER A2 rating is 209 tonnes of CO2.
Covering the complete life cycle
Green Wilo pumps also contribute to the overall efficiency of the new headquarters – from heating and cooling to cold water supply and products for rainwater harvesting. “Central Bank campus is a green building, certified by BREEAM, the world’s leading sustainability assessment method. The bank itself had set a number of objectives when it came to the sustainability of the building – one of our main requirements was to only provide high-efficient pumps with efficiency class IE4 to ensure compliance with BREEAM criteria”, says Derek Elton Managing Director from Wilo Ireland. The Wilo-Stratos GIGA series included for example is an electronically controlled glanded single pump in Inline-design using EC motor technology for increased operation efficiency along with the Wilo-IL-E series used for pumping the heating and chilled water systems. The Wilo-SiBoost Smart 3 Helix EXCEL series are in operation for cold water applications including rain water harvesting. The compact high efficiency pressure boosting system consists of vertically-mounted stainless steel high-pressure multistage centrifugal glanded pumps for which each pump has an integrated frequency converter for maximum efficiency of operation. These packaged booster systems include ready for connection stainless steel pipework base frame mounted and an automatic control system with all necessary measurement and adjustment facility. For a reliable operation in the HVAC applications several Wilo-Stratos models are used. Recently, Wilo Ireland has also been awarded with the service contract for the new campus: “As a global specialist for pumps and pump systems, we offer a wide variety of services to help our clients optimising and securing their processes”, explains Derek Elton. “Caring about our customer is an ongoing process. It is our understanding that our services cover the complete life cycle of our Wilo products – to live up to the sustainable requirements of our customers.” The Central Bank of Ireland also takes a pro-active approach to managing environmental obligations, which results in e.g. rainwater harvesting at North Wall Quay campus. This method is a simple and smart way to collect rainfall for further usage. Capturing the water can help recharge local aquifers or avoid urban flooding and thus create a sustainable water management.
The dockland campus
The building provides a modern workplace facilitating open communication, promoting teamwork and interaction at every level. The heart of North Wall Quay is the atrium, featuring collaboration spaces. More than 1,400 people work at the eight floor building. Central Bank set a number of objectives for the design of the building: apart from establishing a productive workplace, it was of outmost importance to ensure the environmental sustainability.
First industrial scale cMIST™ unit on the way
Sulzer is supplying the first ever industrial scale cMIST™ system for natural gas dehydration with start-up scheduled for the second half of 2020. The unit will be installed at an onshore ExxonMobil facility in the U.S.
The cMIST™ unit is to be delivered to ExxonMobil’s facility by Sulzer Chemtech, the leader in separation and mixing technology, and will be the world’s first commercial application of the cMIST™ technology in place of conventional glycol contactors. The project will be executed by Sulzer’s specialized engineering centers in Tulsa, Oklahoma, U.S., Arnhem, the Netherlands, and Pune, India.
The equipment will showcase how this innovative gas processing solution can support companies in the oil and gas sector in meeting stringent requirements for water content in natural gas with a compact and lightweight solution.
ExxonMobil’s patented technology relies on a proprietary cMIST™ droplet generator and Sulzer’s patented HiPer™ Inline separator to deliver the same performance and efficiency as conventional gas dehydration systems based on glycol contactors, while greatly reducing their weight and footprint. As a result, cMIST™ is particularly beneficial for onshore and offshore facilities, where space is limited. The technology is equally applicable for greenfield or brownfield and can address dehydration capacity and/or efficiency bottlenecks in existing production facilities.
This new project builds on a longstanding partnership between Sulzer and ExxonMobil. ExxonMobil developed cMIST™ technology for gas dehydration, with the assistance of Sulzer, and subsequently offered Sulzer an exclusive license for the design and supply of cMIST™ units for onshore and offshore gas dehydration applications.
Ken Dowd, Technology Development Manager at ExxonMobil, comments: “This project will leverage the combined expertise of Sulzer and ExxonMobil in delivering cutting-edge process technologies for gas treating. We have collaborated with Sulzer’s specialized teams on this technology from the development phase and now look forward to deploying the first industrial-scale cMIST™ field-based unit.”
Danny Thierens, Head of Sales & Market Development – Upstream Systems at Sulzer, concludes: “We look forward to completing the installation of the first industrial scale cMIST™ gas dehydration system in close cooperation with our partner ExxonMobil. This innovative plant will demonstrate the benefits of the system to the upstream oil and gas market and will strengthen the confidence of customers that are considering the deployment of this technology, on the basis of the numerous design concepts that Sulzer has helped to develop since the licensing agreement came into effect.”
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