Displaying items by tag: Electricity

Nigeria: Dangote Cement recorded sales of US$1.9bn during the first nine months of 2023, up by 29% year-on-year from nine-month 2022 levels. The group’s sales volumes of cement and clinker both dropped. The Premium Times newspaper has reported that Dangote Cement’s costs rose by 33%, primarily due to increased spending on electricity and fuel. Nonetheless, its profit after tax grew by 30%, to US$351m.

Croatia: Nexe Group has completed a US$3.3m upgrade to its Našice cement plant. SeeNews has reported that the project consisted of efficiency-increasing upgrades to the plant and other buildings at the site, and the construction of a solar power plant. The producer says that this will reduce the 600,000t/yr-capacity cement plant’s total energy consumption by 1.56GWh/yr.

The Našice cement plant is the site of an on-going expansion and carbon capture system installation project.

Kazakhstan: Steppe Cement reported sales of US$65.2m during the first nine months of 2023. This corresponds to a year-on-year decline of 4.8% from US$68.5m in the corresponding period of 2022. Steppe Cement forecast a year-on-year decline in its earnings before interest, tax, depreciation and amortisation (EBITDA) in full-year 2023 from US$30.9m in 2022, due partly to the impact of inflation on costs, including energy costs.

CEO Javier del Ser Perez said "Despite a slightly smaller domestic cement market so far in 2023, we remain confident that the company will continue to deliver strong sales figures going forward."

El Salvador: Holcim El Salvador says that its first electric cement truck will enter operation at its El Ronco cement plant later in 2023. Local press has reported that this will reduce the plant’s carbon footprint by 560t/yr. The El Ronco plant is the subject of an investment in renewable energy infrastructure to cover 21% of its electricity consumption. The company is also investing in circular economic practices with a view to achieving net zero CO₂ emissions.

Holcim El Salvador chief executive officer Rodrigo Gallardo said "We are building more with less, incorporating recycled materials into our production processes, giving them a second life in order to use only what is necessary and thus contribute to preserving our planet." He added “We are building progress for people and the planet, with the vision of making sustainable construction affordable for everyone. The future of construction in El Salvador is being transformed, and we are proud to be leading the way, as we have done for the past 74 years."

Australia: Boral has been halting production at its various production plants when the cost of electricity becomes too high. “At a certain point during the day, when the price goes up to a certain level, our manufacturing stops,” Chief executive officer Vik Bansal told the Australian Financial Review energy and climate summit. He added that the company had assessed that it was cheaper to have “thousands of people waiting idle for the prices to come down than actually do the work.” Additional reporting by the Sydney Morning Herald newspaper revealed that Boral’s staff had been working overtime and in night shifts to manage energy costs and to maintain the supply of building material products to its customers. Bansal told the summit that the company’s electricity costs rose by 54% in the 12 months to the end of June 2023.

However, Bansal was not clear whether all or just some of Boral’s plants have been stopping production temporarily due to peak daily electricity prices. The company produces cement, lime, concrete, asphalt and aggregates at 360 locations.

Boral has signed a fixed-price, 10-year power purchase agreement that will cover 19% of its renewable electricity needs to 2035, but is reportedly struggling to find other cost-effective options. In August 2023 it also reduced its emissions reduction target to 2025 from 2019 figures to up to 14% from 19% previously. It blamed this on “external factors” such as delays in securing the required regulatory approvals for the next phases of an alternative fuel program.

Taiwan Cement has just commissioned a 107MWh energy storage project at its Yingde plant in Guangdong province, China. Subsidiary NHOA Energy worked on the installation and has been promoting it this week. The battery storage works in conjunction with a 42MW waste heat recovery (WHR) unit, a 8MWp solar photovoltaic unit and a proprietary energy management system. It is expected to store about 46,000MWh/yr of electricity and save just under US$3m/yr in electricity costs.

NHOA Energy, formerly known as Engie EPS before Taiwan Cement bought a majority stake in it, claims it is one of the largest industrial microgrids in the world. We can’t verify this for sure, but it is definitely large. For comparison, the 750MW Vistra Moss Landing Energy Storage Facility in California often gets cited as the largest such facility in the world. This is run by a power company, as are many other large battery energy storage systems. In its annual report for 2022 Taiwan Cement said it was planning to using NHOA’s technology to build seven other large-scale energy storage projects at sites in Taiwan including its integrated Suao, Ho-Ping and Hualien cement plants.

The aim here appears to be supplying renewable electricity to the national grid in Taiwan. Taiwan Cement is diversifying away from cement production, with an aim to derive over 50% of its revenues from other activities besides cement by 2025. In 2022 cement and concrete represented 68% of its sales, while its electricity and energy division, including power supply and rechargeable lithium-ion batteries, represented 29%. The company is also not using its own batteries at the Yingde plant. Instead it is using lithium iron phosphate batteries supplied by Ningde Times. This is worth noting, as the cement producer’s batteries are used in vehicles.

Global Cement regularly reports news stories on cement plants that are building photovoltaic solar power arrays. However, so far at least, energy storage projects at scale have been rarer. One earlier example of an energy storage system loosely associated with a cement plant includes the now decommissioned Tehachapi Energy Storage Project that was situated next to the Tehachapi cement plant in California. That project tested using lithium ion batteries to improve grid performance and integrate intermittent generation from nearby wind farms. It is also worth noting that Sumitomo Osaka Cement’s sister company Sumitomo Electric is one of the world’s larger manufacturers of flow batteries, although no installation at a cement plant appears to have happened yet. In simple terms, flow batteries are an alternative to lithium ion batteries that don’t store as much energy but last longer.

More recently, Lucky Cement in Pakistan started commercial operation of a 34MW solar power plant with a 5.59MWh energy storage unit at its Pezu plant in Khyber Pakhtunkhwa in late 2022. Reon Energy provided the equipment including a lithium-ion based battery approach to the storage. Then, in March 2023, Holcim US said that it was working with TotalEnergies to build solar power capacity and a battery energy storage unit at the Florence cement plant in Colorado. TotalEnergies will install, maintain and operate a 33MW DC ground-mounted solar array and a 38.5MWh battery energy storage system at the site. Operation of the renewable energy system is expected to start in 2025.

Away from electrical batteries, the other approach to energy storage at cement plants that has received attention recently from several quite different companies has been thermal batteries. The two prominent groups using them at different scales are Rondo Energy and Synhelion. The former company has developed its Heat Battery technology, which uses refractory bricks to absorb intermittent renewable energy and then supply the energy back as a steady stream of hot gas for use in a cement plant mill, dryer, calciner or kiln. Both Siam Cement Group (SCG) and Titan Cement have invested in Rondo Energy. In July 2023 SCG and Rondo Energy said that they were planning to expand the production capacity of a heat battery storage unit at a SCG plant to 90GWh/yr. Synhelion, meanwhile, has been working with Cemex on using concentrated solar power to manufacture clinker. It achieved this on an ‘industrially viable scale’ in August 2023. It has since been reported that the companies are working on building a small scale industrial plant at Móstoles near Madrid by 2026. Crucially for this discussion though, the process also uses a thermal energy storage unit filled with ceramic refractory material to allow thermal energy to be released at night, and thus ensure continuous operation.

The examples above demonstrate that some cement companies are actively testing out storing energy at scale. Whilst this will not solve the cement sector’s process emissions, it does potentially start to make using renewable energy sources more reliable and reduce the variable costs of renewable power. Whether it catches on remains to be seen. Most of these kinds of projects have been run by power companies and that is where it may stay. It is instructive to note that Reon Energy was the only company to state that its battery-based energy storage system has a life-span of 8 - 12 years. Our current vision of a net-zero future points to high electrical usage but it may be shaped by how good the batteries are… from our phones to our cars to our cement plants.

For more information on Rondo Energy read the January 2023 issue of Global Cement Magazine

Honduras: Cementos Argos Honduras has commissioned a 1.6GWh/yr solar power plant at its Choloma grinding plant in Río Blanquito. Grupo Argos’ energy subsidiary Celsia built the plant, which consists of 2160 photovoltaic modules. The La República newspaper has reported that the installation cost US$1.2m. It will supply 25% of the Choloma grinding plant’s energy consumption, and reduce its total CO₂ emissions by 23%.

Cementos Argos Honduras CEO Luis Eduardo Tovar said "This partnership marks a significant milestone in our efforts to address climate change and revitalise our ecosystems, while generating significant impact in communities with new employment and investment opportunities.”

Europe: Norway-based Capsol Technologies says that it has signed contracts for two new feasibility studies for carbon capture installations at ‘large cement plants’ in the EU. If successful, the plants will proceed to the installation of Capsol Technologies’ CapsolEoP carbon capture systems. Nordic Daily News has reported that the technology reduces the energy consumption of carbon capture by 50%, and lowers its costs by 25%, according to the supplier.

The new contracts bring Capsol Technologies’ number of cement industry carbon capture contracts to four, and its total contracts to nine, with a potential CO₂ capture capacity of 10Mt/yr.

CEO Jan Kielland said "We are pleased that our solution is gaining attention, as demonstrated by an increasing number of incoming requests for sales engineering and engineering studies, and look forward to being a major contributor in the path to net zero for cement.”

India: Ratings agency ICRA says that the cement industry in India will reach a renewable energy reliance of 40% across its operations in the 2025 financial year. The Hitavada newspaper has reported that this will involve the construction of 537MW-worth of new renewable power capacity. During the 2023 financial year, which ended on 31 March 2023, producers used 35% renewable energy. ICRA said that they can expect to make costs savings of US$240m/yr from 2025 through the scale-up of renewables, including solar, wind and waste heat recovery. This would correspond to a 15 – 18% reduction of estimated energy costs for the 2025 financial year.

Over the same two-year period, ICRA forecast blended cements to rise to 81% of cement sales in the 2025 financial year, from 78% in the 2023 financial year.

France: The French cement sector association, France Ciment, has called on the government to make ‘heavy investments’ in the industry amid its on-going transition to net zero CO₂ cement production. It estimated the total cost of its transition, which will include carbon capture, at Euro3.5bn,according to Les Echos newspaper. The association said that producers currently benefit from the government’s partial price cap on electricity for industrial plants. It sought clarity as to whether the cap will remain in force beyond its scheduled limit in 2025. Lafarge France said that capped prices covered 50 – 60% of its electricity consumption in 2022.