Displaying items by tag: Solar power

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.

Spain: Cementos Molins inaugurated its new Euro6.6m headquarters in Sant Vicenç dels Horts, Catalonia. The facilities include a 3250m² solar power plant, which will supply 100% of the energy consumed in the building’s operations. The solar power plant consists of an array of 1455 photovoltaic panels. Cementos Molins says that it also used recycled materials where possible in building its new headquarters.

CEO Julio Rodríguez said “We celebrate 95 years of life and we feel proud to contribute to the development of the country and its social evolution. In our DNA is the will to collaborate with our environment.”

Bulgaria: Titan Cement subsidiary Zlatna Panega Cement plans to invest Euro11m in sustainability-enhancing upgrades to its Zlatnopanegki cement plant in Lovech Province. The work centres around a Euro7m alternative fuels (AF) upgrade, to raise the plant’s AF substitution rate to 70% from 50% in 2022. Besides this, the producer will also invest Euro4m in the construction of a solar power plant at the facility. The solar power plant is scheduled for commissioning in March 2024. General manager Adamantios Frantzis said that the plant will subsequently move on to its ‘next big project,’ consisting of a Euro35 – 50m upgrade, in 2026 – 2028.

Zlatna Panega Cement invested Euro5.7m in capital expenditure throughout 2022, more than double its investments of Euro2.6m in 2021. It is committed to interim CO₂ reduction targets of 5000t/yr (Scope 1) and 3000t/yr (Scope 2 and 3), and net zero CO₂ emissions by 2050.

Canada: Lafarge Canada has engaged Canadian Utilities on a virtual power purchase agreement (VPPA) basis to supply solar energy for its Exshaw cement plant in Alberta. Under the agreement, the Exshaw cement plant will receive 100% of energy generated at the 38.5MW Empress solar power plant in Cypress County. The VPPA lasts until 2036, and covers 34% of the Exshaw plant’s energy consumption up to that time.

Lafarge Canada (West) president and CEO Brad Kohl said "We're continually assessing ways we can reduce our environmental impact while actively pursuing sustainable solutions within our operations." He concluded "Our collaboration with Atco underscores our commitment to adopting renewable energy at our plants and sites, which is key to reducing our reliance on fossil fuels."

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

China: Taiwan Cement (TCC) commissioned a 107MWh energy storage project at its Yingde plant in Guangdong province in August 2023. Subsidiary NHOA Energy worked on the project that linked the battery storage capacity to a 42MW waste heat recovery (WHR) system and a 8MWp solar photovoltaic unit. It uses lithium iron phosphate batteries supplied by Ningde Times.

The company’s say that the project is one of the largest industrial microgrids in the world. It is intended to provide energy flexibility to the cement plant by using NHOA Energy’s proprietary energy management system to manage peaks in energy demand and acting as a backup for critical equipment to avoid damage caused by sudden blackouts.

The NHOA Energy storage project is expected to store about 46000MWh/yr of electricity and save just under US$3m/yr in electricity costs. The system will also support the Guangdong Provincial Government’s energy storage development policy and be eligible to associated subsidies of over US$350,000/yr.

Giuseppe Artizzu, the chief executive officer of NHOA Energy, said “NHOA Energy’s proprietary energy management system will optimise the generation and consumption profile of the industrial microgrid, while also supporting the regional grid towards its 100% green energy objective, taking the energy transition in the area one step forward in total accordance with NHOA Group’s and TCC’s shared mission of fostering a positive change for the future of our planet.”

Zimbabwe: South Africa-based PPC says that it has completed a solar plant tendering process for its Colleen Bawn and Bulaweyo plants. Chief executive officer Roland van Wijnen said that a 30MW captive plant has been approved by the board, generation licenses have been approved and that the project site has been cleared ahead of construction.

Van Wijnen added that PPC continues to see Zimbabwe as a ‘strong market for the group’ despite some economic challenges, explaining “We took a relatively long operational stop to ensure our operations in the country are future-proof and improved from an environmental standpoint. The plant is now performing well from both an output and cost-per-tonne perspective. We knew our earnings before interest, tax, depreciation and amortisation (EBITDA) would be reduced due to this operational stoppage. We have since stepped up production and reclaimed market share and we anticipate EBITDA to meet or exceed full year 2022 levels in full year 2024.”

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.”

India: JK Lakshmi Cement has concluded a deal to acquire a 21% stake in solar power plant engineering company Amplus Helios. Amplus Helios was founded as a special purpose vehicle for the construction of a 50MW captive solar power plant at JK Lakshmi Cement’s 1.7Mt/yr Durg cement plant in Chhattisgarh. The Free Press Journal has reported that the solar power plant will cost US$26m.

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.