Tag Archives: cooling tower

Howden delivers mine cooling plant at Roxgold’s Yaramoko mine

Environmental, Mine operation news, Mine ventilation, Mining services, Precious metals, , , , , , , ,

Howden says it has successfully delivered the first phase of an 8 MW surface bulk air cooling plant for Roxgold’s Yaramoko gold mine in Burkina Faso.

The Yaramoko Mine Complex is in a remote region of Burkina Faso, 200 km southwest of Ouagadougou.

The cooling plant is designed to deliver a maximum of 190 cu.m/s of chilled downcast ventilation air, with the air cooled from a design ambient temperature of 25.8°C, down to 15°C.

The plant comprises an open-spray vertical bulk air cooler located on top of the shaft collar, centrifugal chillers and conventional cooling towers, Howden explained.

Plant design and construction were started at the beginning of 2020 during the early onset of the COVID-19 pandemic, and, despite a challenging environment, Howden successfully delivered the project’s first phase in May.

Howden said: “This latest project continues to positioning Howden as a process and system specialist to design, supply and install mine cooling systems. Howden has a technology-neutral approach whereby technology options are offered which best suits customer’s technical and commercial requirements.”

The Yaramoko Mine Complex, which consists of two underground operations, delivered production of 35,308 oz of gold in the March quarter, Roxgold reported in May.

Aggreko goes global with mobile and modular cooling tower

Environmental, Mining consumables, Mining equipment, Mining services, Power supply for mines, , , ,

Aggreko has launched the Global Cooling Tower (GT) series, its first mobile and modular cooling tower for the global market.

The provider of modular, mobile power solutions said the GT series aims to “support and increase efficiency for customers operating in an increasingly decentralised and digitalised energy market”.

“Engineered by Aggreko, the GT Series’ unique modular design aims to reduce customer energy costs and save space on industrial sites. Uniquely, the new cooling towers are built into a standard shipping container frame that can be installed quickly and easily on new sites, or integrated as part of existing Aggreko projects typically within a few days following delivery,” the company said.

To support the frame, Aggreko has developed new extendable legs, housed within the frame, which can adjust the height of the cooling tower, based on customer need and application.

The towers are currently available in two sizes, the GT-40 and GT-20, and can be lifted with a forklift or crane, and transported by road, rail, ship or air. This can reduce customer shipping costs by up to 40%, and offer a 25% smaller footprint, when compared with current towers, according to Aggreko. This, coupled with the unique extendable legs, allow the position of ancillaries under the towers to make the most efficient use of space on-site, the company says.

The units, which have already been installed at customer sites from Japan to North America, can cool up to 4,000 gallons per minute (15.14 m³/min). The modular design of the units, however, allows the GT Series units to be interconnected side by side, or end to end, to cool up to 1,500,000 g/min (5,678 m³/min).

Aggreko said: “The introduction of the GT series is the latest in a long line of Aggreko cooling technology innovations. In recent years, the company has led some of the largest emergency cooling operations ever undertaken, in sectors such as petrochemical and refining, oil and gas, mining, and food and beverage.”

The units maintain temperature control and reduce energy costs through variable-speed fan motors. Aggreko estimates monthly energy savings from a single GT-40 cooling tower range from $2,000 to $5,000 compared with other rental cooling towers, contributing towards decarbonisation targets.

Bill Carrick, Aggreko Group Director of Temperature Control, said: “As energy markets continue to transition, Aggreko remains committed to the ongoing technology investment and innovation that best suits changing customer needs.

“The expertise of our people combined with the global availability of our large fleet of cooling towers, piping, pumps and power generation equipment, gives our customers an unmatched solution to meet any cooling need, no matter how large, how far or how urgent.”

The GT Series is fully connected to Aggreko Remote Monitoring, providing constant monitoring of flow rates, temperatures, power consumption and water levels to ensure continuous top-performance around the clock.