Data centre · Clare · 52.8636, -8.9296
Art Data Centres Ennis
permitted Art Data Centres Our classification · status
200 MW
Stated maximum demand
planning documents · a ceiling, not use
Not available for this site: measured grid draw (no EPA annual report: only sites with ≥50 MWth of plant file one); mapped footprint; rates (no valuation-list entry matched).
Why we say it's permitted
- Planning 21757: unstarted, permission live (expires 2029-04-14)
Who runs it
- planning applicant 'Art Data Centres Ltd' -> Art Data Centres (developer/operator; high-confidence entity link from planning)
Leaflet © OpenStreetMap contributors
What the planning and licence documents say
Full 6-building campus with 120MW gas energy centre (ABP-314474-22, granted 2024); substation separate SID.
| Spec | Value | Quote and source |
|---|---|---|
| Electrical demand | 200 MW | "The c.200MW of electricity required to power the data centre would be supplied by the national grid via the nearby Ennis 110kV substation (c.80MW)" ACP 314474 inspector report, p.57 c.80MW grid + c.120MW on-site energy centre |
| Grid voltage | 110 kV | "a 110kV (GIS) substation which would connect the data centre to the national grid via 2 x underground transmission lines (Ennis 110kV substation" ACP 314474 inspector report, p.8 |
| Connection point | Ennis 110kV substation via new 110kV GIS substation (concurrent SID ABP-313895-22) | "a 110kV (GIS) substation which would connect the data centre to the national grid via 2 x underground transmission lines (Ennis 110kV substation" ACP 314474 inspector report, p.8 |
| On-site generation | lean-burn gas engines in energy centre for primary co-supply; plus 66 standby diesel generators (11 per building) | "18 x lean-burn natural gas engines exhaust flues (c.25m high)" ACP 314474 inspector report, p.6 |
| Generating units | 18 units | "18 x lean-burn natural gas engines exhaust flues (c.25m high)" ACP 314474 inspector report, p.6 gas engines only; 66 standby diesel generators additional |
| On-site output | 120 MW | "the proposed onsite energy centre (c.120MW)" ACP 314474 inspector report, p.57 gas energy centre only |
| Fuel | natural gas (future hydrogen / biomethane) | "The on-site energy centre would be fuelled by natural gas via the nearby natural gas pipeline" ACP 314474 inspector report, p.57 |
| Cooling | adiabatic | "evidence of no increased fire risk from adiabatic cooling" ACP 314474 inspector report, p.11 |
| Water | 907 m3/day | "Data centre would draw 907m3/day of water from the town mains & supplement with 93m3 of stored rainwater" ACP 314474 inspector report, p.32 third-party appellant's figure |
| Floor area | 118,740 m2 | "that will have a combined gross floor area of 118,740 sqm" ClareCC ePlan register entry 21757 (development description), p.1 6 x c.19,790m2 |
| Phasing | grid-connected Phase 1, later phases powered by on-site gas engines; 10-year permission | "the grid connected Phase 1 and subsequent phases which will be powered by on-site gas engines" ACP 314474 inspector report, p.30 third-party characterisation |
| Dates | granted 15/04/2024 (ABP modified); expires 14/04/2029 | "Grant Date: 15/04/2024 Grant Managers Order #: Section 47 Apply?: Part 5 Apply?: Expiry Date: 14/04/2029" ClareCC ePlan register entry 21757 (development description), p.1 |
| Heat reuse | low-grade waste heat to on-site vertical farm; future district heating connection | "Provision for future connection to a district heating system within 5km. o Reuse of low-grade waste heat In vertical farm." ACP 314474 inspector report, p.32 |
| Renewables | rooftop solar; CPPAs proposed, no contract | "Potential for CPPAs to offset entire energy usage, willing accept a related Condition" ACP 314474 inspector report, p.37 |
Every value is quoted from the document and page cited; the quote was checked against that page's text. "Derived" means the reader worked it out from stated figures (shown in the quote). Planning and licence figures are design or permitted values, not measured use; values derived from an EPA annual environmental report (AER), mostly water, are reported use for that year. The note under each quote gives the scope and whether a demand figure is a maximum or an average.
Planning history
| Received | Ref | What | Decision | Built? |
|---|---|---|---|---|
| 2021-07-16 | 21757 | - a permission of 10 years in duration is sought. The application site has a total of c. 60 hectares with a nett area for development of c. 45 hectares, and is bound to the south by R352 (Tulla Road), to the east and the north by agriculture land, to the west by the M18. The development will consist of: the demolition of an existing single storey with pitched roof farm dwelling house together with 8 No. farm outbuildings on the overall site. The construction of 6 No. two storey data centre buildings with three storey plant/office levels and associated ancillary development that will have a com | CONDITIONAL | unstarted, permission live |
Appeal 314474 (21757) · grant, 2024-04-05 · 200 MW stated
Grid: 110 kV · subject to EirGrid agreement; final approval to connect not yet given
Issues: fossil gas lock-in / hydrogen reliance · 657,000 t CO2e/yr claimed by appellants (~1.1%) · carbon budgets · regional location supports grid
"The c.200MW of electricity required to power the data centre would be supplied by the national grid via the nearby Ennis 110kV substation (c.80MW)" p.57
"it is possible that the 120:80 MW balance could shift in favour of the on-site energy centre in the future" p.57
Sources for this page
planning:CLARE/21757 · acp:314474
Joined from OpenStreetMap, the planning register, An Coimisiún Pleanála, EPA licences and annual reports, the Tailte Éireann valuation list and Building Control. Data built 2026-10-10.