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Moneypoint power station
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Moneypoint power station (Irish: Stáisiún cumhachta Ghob na Muine)[1] is a large power station in Ireland which ceased to be a coal-fired power station in June 2025. After ceasing burning coal, it is to operate as a "back-up out-of-market generator" using heavy oil for electricity generation until 2029.[2] The facility also operates a flywheel synchronous condenser providing grid-stabalization services.[3]
Key Information
For a period, Moneypoint was Ireland's largest electricity generation station (with an output 915 MW),[4] and its only coal-fired plant.[5] Commissioned between 1985 and 1987,[6] it is located on the River Shannon, near Kilrush in County Clare, and was constructed at a cost of more than £700m.[7] The station originally operated largely on coal, making it both unique in the context of Irish electricity production and for a while was the country's single largest emitter of greenhouse gases.[8] At its peak, it was capable of meeting around 25% of customer demand across the country[9] but by 2023, coal's share of the electricity fuel mix in Ireland had fallen to 4%.[10]
When operating as a coal-fired power station, it had three Brown Boveri four-cylinder, single-shaft impulse reaction turbines which were directly connected to three electric generators. The steam was generated by three Foster Wheeler two-pass boilers, which converted water into high pressure steam by combustion of the coal.
The power station chimneys, at 218m, are the tallest free-standing structures in Ireland.
History
[edit]Moneypoint was under construction from 1979 to 1987.[11] Before its construction, Ireland depended heavily on imported oil for its energy.[12] During the 1970s, a sharp increase in oil prices over a short period of time led the government and the Electricity Supply Board to choose coal as a fuel, as it was seen as a plentiful resource with a stable price.[13]
In 2019, the government launched its climate action plan which included a commitment to end the burning of coal in Moneypoint by 2025,[14] and replace coal-fired generation with "low-carbon and renewable technologies". As of 2021, one option being explored was a 400 MW floating wind farm with an onshore hydrogen facility.[15] A plan was announced in April 2021 by its owner, the ESB Group, to replace the facility with a green-energy hub.[16]
In 2023, it was reported that the plant would continue operations until 2029 as an oil-burning back-up facility of last resort.[17] By 2024, the ESB Group had been granted permission to convert the facility for use as a Heavy Fuel Oil (HFO) generator.[18] It has two HFO storage tanks with a capacity of 50,000 tonnes.[6]
In June 2025, coal-burning ceased at Moneypoint.[2]
See also
[edit]References
[edit]- ^ Creatphlean Comhtháite Straitéiseach d'Inbhear na Sionainne (Strategic Integrated Framework Plan for the Shannon Estuary) (PDF) (Report) (in Irish). Limerick City and County Council, Clare County Council, Kerry County Council, Shannon Development, Shannon Foynes Port Company. p. 7. Retrieved 30 September 2023.
- ^ a b "Moneypoint Power Station to end coal burning after 40 years", rte.ie, 20 June 2025
- ^ Radowitz, Bernd (4 May 2021). "Siemens Energy technology to stabilise grid at giant Irish floating wind energy hub". Recharge | Latest renewable energy news. Archived from the original on 5 May 2021.
- ^ "ESB History Timeline". esb.ie. Archived from the original on 22 May 2010. Retrieved 6 July 2010.
- ^ McMahon, Páraic (24 October 2022). "Electricity generation from coal at Moneypoint up this year". clareecho.ie. Retrieved 30 September 2023.
- ^ a b "ESB informational document" (PDF). esb.ie. Archived from the original (PDF) on 24 September 2015.
- ^ "Moneypoint to power on despite protests". The Times. The Times (UK). 15 July 2018.
- ^ "Business: New-tech solution 'could clean up' Moneypoint". Irish Independent. 12 December 2006.
- ^ "ESB Announces Green Atlantic at Moneypoint". esb.ie (Press release). 9 April 2021. Retrieved 25 July 2024.
At its peak, Moneypoint produced 25% of Ireland's electricity requirements
- ^ "ENERGY IN IRELAND 2023 Report" (PDF). seai.ie. p. 146.
- ^ "About ESB: Moneypoint - Station History Construction". esb.ie. Archived from the original on 24 August 2003. Retrieved 27 August 2014.
- ^ "About ESB: Moneypoint - The station". esb.ie. Archived from the original on 14 April 2009. Retrieved 17 August 2009.
- ^ "About ESB: Moneypoint - Fuel type". esb.ie. Archived from the original on 23 December 2008. Retrieved 24 September 2009.
- ^ "Climate Action Plan 2019" (PDF). gov.ie. Archived from the original (PDF) on 17 July 2019. Retrieved 17 July 2019.
- ^ "New Moneypoint offshore wind energy plan will power 1.5 million homes". The Clare Champion. 8 April 2021. Archived from the original on 11 April 2021.
- ^ "Ireland to replace last coal plant with huge green hub and floating wind farm". 12 April 2021.
- ^ "Moneypoint power station to be kept open until 2029 despite emissions concerns". The Irish Times. Retrieved 13 February 2024.
- ^ Moneypoint power station gets approval for conversion to 'last resort' Heavy Fuel Oil generator, 3 October 2024

External links
[edit]- Official Information Sheet (PDF) (archived 2015)
Moneypoint power station
View on GrokipediaOverview
Location and Site Characteristics
The Moneypoint power station is located on the northern shore of the Shannon Estuary in County Clare, Ireland, within the province of Munster, approximately 3 km west of Killimer and 6 km southeast of Kilrush.[8][9] Its geographic coordinates are approximately 52.6074° N, 9.4237° W.[10] The site occupies nearly 500 acres of coastal land, providing ample space for generating units, fuel handling infrastructure, ash storage facilities, and ancillary operations.[6] The estuarine setting facilitates seawater cooling for the plant's operations and direct coal imports via a dedicated 380-meter-long berth capable of accommodating vessels up to 200,000 deadweight tons with a alongside depth of 25 meters.[11] The surrounding terrain consists primarily of low-lying, relatively flat coastal plain adjacent to the estuary, which supports heavy industrial development while integrating with the broader Shannon Estuary's tidal and fluvial hydrology.[12] This location was selected for its proximity to deep-water navigation routes, minimizing inland transport needs for bulk fuel supplies, though it exposes the site to potential estuarine flooding risks and marine environmental interactions.[13]Design and Capacity
The Moneypoint power station is a coal-fired thermal power plant comprising three identical generating units, each rated at 305 MW, for a total installed capacity of 915 MW.[2][14] This configuration positions it as Ireland's largest baseload electricity generator prior to the coal phase-out.[1] The design emphasizes conventional steam cycle operation, with each unit featuring an independent boiler, steam turbine, generator, and auxiliary systems.[14] Boilers in each unit are designed for dual-fuel capability, primarily combusting pulverized coal but adaptable to heavy fuel oil for startup or backup.[14] Steam generated drives Brown Boveri turbines, specified as four-cylinder, single-shaft impulse-reaction types, which convert thermal energy into mechanical power before electricity generation.[15][16] The plant's layout includes coal handling facilities, ash management systems for furnace bottom ash and pulverized fly ash, and cooling infrastructure drawing from the Shannon Estuary.[9] Environmental design features, incorporated from initial planning, include flue gas desulfurization readiness and stack emissions controls to mitigate particulate and sulfur outputs.[17]Historical Development
Planning and Construction (1970s–1980s)
The Electricity Supply Board (ESB) initiated planning for the Moneypoint power station in the 1970s amid the global oil crises of 1973 and 1979, which highlighted Ireland's vulnerability to imported oil for over 80% of its electricity generation and prompted a national strategy for fuel diversification toward coal and other indigenous or accessible sources.[1] The project aimed to meet rising electricity demand—projected to double by 1990—while reducing oil dependence and enhancing supply security through baseload coal-fired capacity.[1] Site selection focused on the Shannon Estuary's northern shore near Kilrush in County Clare, leveraging its natural deepwater access—the deepest in Europe after Rotterdam—capable of accommodating large coal bulk carriers up to 150,000 tonnes without dredging, alongside available industrial landbank and proximity to the national grid.[6] The ESB acquired the Moneypoint site in the late 1970s specifically for this coal-fired development.[18] Construction began in 1979 and spanned until 1987, involving the erection of three 305 MW pulverized coal-fired units equipped with Brown Boveri steam turbines, totaling 915 MW capacity.[2] Key infrastructure included a 380-meter jetty for coal unloading from seagoing vessels, completed in phases through the early 1980s, and a 731-foot (223-meter) reinforced concrete chimney stack to disperse flue gases.[19] The project, managed by ESB with international contractors for specialized components, incurred costs exceeding £700 million (equivalent to approximately €900 million in 2023 terms), reflecting the scale of civil engineering, boiler systems, and transmission integrations required.[11] Unit 1 entered commercial operation in 1985, followed by Unit 2 in 1986 and Unit 3 in 1987, marking the station's full commissioning and Ireland's shift toward coal as a primary generation fuel to buffer against oil price volatility.[2] Initial coal sourcing emphasized imports via the dedicated jetty, with designs incorporating electrostatic precipitators for ash capture, though early operations prioritized reliability over stringent emission controls prevalent in later decades.[1] The development proceeded under ESB oversight with planning permissions secured through national authorities, avoiding major delays despite the era's economic constraints in Ireland.[20]Operational History (1985–2025)
The Moneypoint power station commenced operations with the commissioning of its first 305 MW coal-fired unit in September 1985, followed by the second unit in 1986 and the third in 1987, achieving a total installed capacity of 915 MW.[10][18] Designed to address rising electricity demand and mitigate Ireland's reliance on imported oil amid the 1970s energy crises, the station rapidly became the country's largest thermal generator, supplying approximately 25% of national electricity needs during its peak operational years.[1][13] From the late 1980s through the 1990s, Moneypoint functioned primarily as a baseload facility, operating at high capacity factors to provide stable, dispatchable power to the grid managed by the Electricity Supply Board (ESB).[1] Its reliability supported Ireland's economic growth, with the plant's subcritical steam turbines enabling consistent output despite fluctuations in coal supply from international sources, primarily Poland and Colombia.[13] No major unplanned outages or operational failures were publicly documented during this period, underscoring the engineering robustness of the Foster Wheeler-designed units.[21] The early 2000s marked a shift as natural gas-fired combined-cycle plants proliferated, offering higher efficiency and lower emissions, which gradually reduced Moneypoint's utilization.[1] By the 2010s, rising carbon prices under EU emissions trading schemes and the expansion of renewables further curtailed its role, transitioning it toward intermediate and peaking operations during periods of high demand or low wind/solar generation.[22] Annual output declined from multi-terawatt-hour levels in earlier decades to approximately 2 TWh over 2023–2024 combined, reflecting deliberate load reductions to comply with decarbonization policies rather than technical limitations.[22][23] Throughout its operational lifespan until mid-2025, the station maintained grid stability, particularly as a counterbalance to intermittent renewables, though its emissions profile drew scrutiny from environmental regulators.[24] In 2023, ESB implemented workforce reductions in anticipation of reduced operations, yet retained the units for potential emergency dispatch under security-of-supply agreements with grid operator EirGrid.[25] Coal combustion ceased entirely on June 20, 2025, after 40 years, with the plant transitioning to reserve status pending fuel conversion.[24][22]Coal Phase-Out (2025)
On June 20, 2025, ESB ceased coal-fired generation at Moneypoint, marking the end of coal use for electricity production in Ireland after 40 years of operation since the plant's commissioning in the mid-1980s.[5][24] This action fulfilled Ireland's national commitment under the Climate Action Plan to phase out coal generation by the end of 2025, aligning with EU decarbonization targets and reducing reliance on high-emission solid fuels.[20] The shutdown occurred ahead of the original year-end schedule, with the plant's four 256 MW units—totaling 915 MW capacity—no longer burning imported coal, primarily from Colombia and Poland.[26][22] The phase-out was facilitated by prior infrastructure modifications, including the reactivation of heavy fuel oil capabilities originally used during the plant's early years before coal conversion. In 2023, ESB and grid operator EirGrid formalized an agreement designating Moneypoint as an emergency reserve unit, operational on distillate or heavy fuel oil from 2025 through 2029, invocable only for system stability during peak demand or renewable shortfalls.[5][27] This transition avoided immediate full decommissioning, preserving baseload flexibility amid Ireland's growing variable renewable integration, which reached over 40% of electricity in 2024. Regulatory approval from An Bord Pleanála in October 2024 confirmed the coal-to-oil conversion, emphasizing minimal routine operations to limit emissions.[22] The cessation positioned Ireland as the 15th European country to eliminate coal from its power sector, reducing annual CO2 emissions from Moneypoint—historically around 4-5 million tonnes—though oil backup introduces residual fossil dependency for rare events.[26][28] ESB stated the move advances its net-zero by 2040 strategy, supported by investments in offshore wind and grid enhancements, while coal stockpiles at the site were phased out without reported environmental incidents.[5] No significant job losses were anticipated immediately, as staff transition to maintenance and potential future green projects at the site.[29]Technical Specifications
Generation Units and Fuel Systems
The Moneypoint power station consists of three identical coal-fired generating units, each with a nameplate capacity of 305 MW, yielding a total installed capacity of 915 MW.[2][16] Each unit features a natural circulation boiler supplied by Amec Foster Wheeler, designed for pulverized coal combustion, paired with a reheat steam cycle.[30][16] The boilers produce high-pressure steam to drive four-cylinder, single-shaft impulse-reaction steam turbines manufactured by Brown Boveri (now associated with GE Power), directly coupled to generators for electricity production.[2][16] The fuel systems support dual-fuel operation, with coal as the primary fuel and heavy fuel oil (HFO) as a backup or alternative for startup and limited operations.[14] Coal handling infrastructure includes a deep-water jetty accommodating vessels up to 250,000 deadweight tons (DWT) for unloading, followed by covered conveyors, transfer towers, stacker-reclaimers, and coal crushers to process up to 7,000 tonnes per day or approximately 2 million tonnes annually.[2][31] Pulverized coal is fed to the boilers via mills, with on-site storage capacity of 600,000 tonnes enabling up to three months of full-load operation without resupply.[2][1] HFO systems comprise two storage tanks with a combined capacity of 50,000 tonnes, integrated into the boiler firing capabilities for flexibility during fuel transitions or emergencies.[2][14]Infrastructure and Grid Integration
The Moneypoint power station features an on-site substation operating at 400/220/110 kV, enabling efficient connection to Ireland's high-voltage transmission network managed by EirGrid.[32] The substation steps up output from the station's generators—each producing at around 110 kV—to 400 kV for long-distance transmission, minimizing losses and supporting bulk power dispatch across the system.[32] This infrastructure includes gas-insulated switchgear (GIS) redevelopment to handle increased flows from southwestern renewable projects.[33] Key transmission connections from the Moneypoint 400 kV substation include overhead lines to Dunstown substation in Kildare and Oldstreet (Portumna) substation in Galway, forming critical corridors for exporting power eastward.[34] [35] Additionally, a 220 kV interconnection links Moneypoint to Kilpaddoge substation across the Shannon Estuary via 21 km of XLPE submarine cable and 4 km of land cable, incorporating fiber optics for control and monitoring.[36] These links position Moneypoint as a pivotal node in the western transmission grid, capable of injecting up to 915 MW while accommodating future offshore wind tie-ins at both 400 kV and 220 kV levels.[37] For enhanced grid stability amid rising renewables penetration, the site hosts a synchronous condenser equipped with the world's largest flywheel, providing synthetic inertia (up to 6,963 MVA·s across similar projects), reactive power for voltage control, and short-circuit strength to mimic synchronous generation behavior.[38] [39] This zero-carbon addition, operational since 2022, supports frequency regulation and black-start capabilities, ensuring reliable integration of inverter-based resources without relying on fossil fuel dispatch.[38] Post-2025 coal phase-out, the infrastructure retains backup generation potential under EirGrid's out-of-market protocols, connected via the same high-voltage bays for rapid system response.[5]Environmental and Ethical Considerations
Emissions Profile and Pollution Data
The Moneypoint Generating Station, Ireland's largest coal-fired power plant, has historically been the country's single largest source of carbon dioxide (CO2) emissions from electricity generation. In 2022, its operations accounted for approximately 5% of Ireland's total greenhouse gas emissions and 31% of emissions from the power generation sector. Average annual CO2 emissions during full coal operations from 2021–2022 totaled around 2.94 million tonnes. Earlier data show variability: 3.89 million tonnes in 2013 and 4.41 million tonnes in 2016, reflecting load factors and fuel use. These figures stem from burning imported coal in three 305 MW units, with total capacity of 915 MW, contributing significantly to Ireland's fossil fuel dependency despite retrofits for emission controls.[40][14][41] Criteria air pollutants, including sulfur dioxide (SO2), nitrogen oxides (NOx), and particulate matter (PM), have been subject to stringent controls under Ireland's Integrated Pollution Prevention and Control (IPPC) licensing and EU Industrial Emissions Directive requirements. In 2013, annual emissions totaled 7,163 tonnes of SO2, 4,892 tonnes of NOx, and 224 tonnes of dust across the three units, all within EPA-specified emission limit values (ELVs) and National Emissions Reduction Programme (NERP) targets. Compliance remained high in recent years; the 2024 Annual Environmental Report documented over 97% adherence to hourly and daily ELVs for NOx (97–99.6% across units), SO2 (98.9–99.7%), and PM (99.97–100%), with continuous monitoring via certified systems. A single daily SO2 exceedance occurred on May 13, 2024, at one unit due to limited operation, but monthly averages complied after corrective action; no persistent non-compliances were noted.[14][42]| Pollutant | 2013 Annual Total (tonnes) | 2024 Compliance Rate (Hourly ELVs) | Key Controls |
|---|---|---|---|
| SO2 | 7,163 | 98.9–99.7% | Flue gas desulfurization (FGD) |
| NOx | 4,892 | 97–99.6% | Selective catalytic reduction (SCR) |
| PM/Dust | 224 | 99.97–100% | Electrostatic precipitators |

