Arcadis also positions independent owner’s engineering as a delivery mechanism to protect client interests across technical, financial, and schedule dimensions
Decision Focus
Arcadis, the global design and engineering consultancy, has published its current framework for sustainable data center delivery. The three operational pillars it describes are: replacing diesel standby generation with battery energy storage systems (BESS), deploying smart environmental monitoring to widen equipment thermal operating ranges in line with ASHRAE guidelines, and anchoring large-scale renewable design in the SINES DC campus in Portugal—a 1.2 GW facility powered entirely by renewables and cooled using seawater drawn from its Atlantic coastal position. The operational signal for energy leadership is specific: a vendor with significant European and Latin American project exposure is standardizing around BESS-first backup architecture and geography-led cooling strategy at a scale that warrants direct comparison against your own infrastructure planning assumptions.
90-Second Brief
Today, arcadis reports that data centers consume up to 50 times more energy per square meter than comparable commercial buildings and represent up to 3% of global electricity consumption, a figure the company uses to anchor the business case for infrastructure transformation. Its published approach substitutes BESS for diesel generation, expands thermal operating envelopes using ASHRAE-compliant monitoring, and applies seawater cooling at SINES DC in Portugal, which it describes as one of the largest data center campuses in Europe at 1.2 GW. Arcadis also positions independent owner’s engineering as a delivery mechanism to protect client interests across technical, financial, and schedule dimensions. These are design and delivery positions drawn from a single consulting firm’s own materials, not independently audited outcomes, but the configuration choices they describe are real decision variables for any operator building in coastal Europe or planning backup generation transitions.
What Is Really Happening?
The deeper pattern behind this announcement is that engineering consultancies are converging on BESS-first backup strategies and geography-leveraged cooling as the two design moves most likely to close the gap between sustainability commitments and operating economics at hyperscale. Diesel standby generation has long been treated as an unavoidable reliability layer; Arcadis is positioning BESS as a direct replacement rather than a supplement. That framing matters because the cost, procurement timeline, and regulatory treatment of BESS versus diesel vary significantly by jurisdiction, and the choice now carries direct Scope 2 implications in sustainability reporting frameworks.
Separately, the SINES DC example signals a growing design philosophy: locate large campuses where natural thermal assets—ocean proximity, cold climate, altitude—do structural cooling work that would otherwise require mechanical energy. At 1.2 GW, seawater cooling is not a novelty feature but a primary engineering decision with portfolio-level implications for PUE, water consumption metrics, and permitting exposure.
Why It Matters for Global Heads of Data Center Energy
Three decision points surface directly. First, if BESS is entering vendor standard practice as a diesel replacement rather than a supplement, procurement teams need to revisit the cost and contract structures supporting existing standby generation. Behind-the-meter BESS procurement at campus scale requires longer lead times and different counterparty relationships than fuel supply contracts—the planning cycle is not equivalent.
Second, the ASHRAE thermal envelope expansion angle is consequential for cooling energy budgets. Arcadis describes monitoring technologies that allow equipment to operate across a wider temperature range without durability compromise. If that range is achievable in your current facilities, it represents a direct reduction in cooling system runtime without capital expenditure on new equipment. The limiting factor is whether your current monitoring infrastructure supports real-time thermal management at that granularity, which varies widely across legacy and newly built campuses.
Third, seawater cooling at 1.2 GW in Portugal is a benchmark for what geography-driven cooling can accomplish at the high end of campus scale in a European regulatory environment. If you have sites in coastal or sub-Arctic regions where natural cooling assets are underutilized, this is a reference point for what an aggressive design approach can achieve in PUE and carbon footprint outcomes.
Forward View
Three fronts are worth tracking as BESS-first and geography-led cooling approaches move from vendor positioning toward wider adoption. First, BESS procurement volumes for large campus backup are beginning to compete with grid-scale storage for the same battery supply chains; any tightening in lithium iron phosphate cell availability would compress the planning window for operators intending to transition standby generation. Second, seawater and ambient cooling configurations require site-specific permitting—coastal thermal discharge in Portugal operates under EU Water Framework Directive constraints that differ from equivalent processes in Southeast Asia or North America. Operators evaluating this design approach in new geographies should map regulatory timelines before treating it as a transferable model. Third, as ASHRAE-aligned thermal expansion becomes a standard consulting offer, expect utility engagement around demand flexibility to follow—wider thermal envelopes mean operators can shift cooling load more aggressively during peak pricing windows, which changes the economics of demand response participation.
What Is Still Uncertain
The Arcadis materials are self-published and describe design positions rather than audited performance outcomes. SINES DC’s operational energy and water efficiency metrics have not been independently verified in this source. The claim that seawater cooling “optimizes energy efficiency and reduces carbon footprint” is a design intent statement, not a reported PUE or WUE figure. The conditions under which BESS fully replaces diesel—specifically backup duration requirements, discharge depth specifications, and regulatory acceptance for life-safety loads—are not detailed. For operators evaluating a BESS transition, those parameters determine whether a like-for-like replacement is achievable or whether hybrid configurations remain necessary under current standards.
One Question for Your Team
Which sites in your current portfolio have standby diesel capacity that would meet your backup duration requirements if replaced by BESS at current cell costs and lead times—and has that analysis been run against your 2026 procurement cycle?
Sources
- Arcadis — Arcadis: Sustainability in Data Centers (Link)
