Eastern Europe
Indirect Free Cooling MDC in Dense Urban Courtyard
Two shortened modules providing 35 kW IT load with indirect free-cooling, engineered to pass through a narrow archway and operate inside a historic courtyard.
Book a 30-min call
Context
The client required a resilient on‑prem compute adjacent to their HQ yet could not renovate the historic building or place equipment street‑side.
The only feasible location was a walled inner courtyard accessed via a narrow archway – imposing strict limits on module length and height while keeping standard width for road logistics. Energy efficiency was a procurement priority, with preference for “green” operation during the region’s long cool season.
At a glance
Customer
Government entity, Eastern European capital (anonymized)
Use case
Energy‑efficient edge compute in a constrained, inner‑courtyard site
Outcome
Tier III ready MDC with indirect free‑cooling provides energy savings during the cold/cool seasons
IT capacity
35 kW across five racks
Time‑to‑deploy
~5 months (design → build → FAT → commissioning)
Transport & siting
Custom modules sized for archways and standard road‑legal width access
Challenges
Tight urban access
Single access route under a low, narrow arch; limited turning radius inside the yard
Continuity
High availability (concurrent‑maintainable power/cooling) with clean agent fire suppression and monitored access
Energy policy
Preference for low‑OPEX cooling for most of the year
No building works
Historic façade and protected utilities ruled out major civil reconstruction
Solution
A two‑module MDC using indirect free cooling (IFC). Each module kept standard container width for public‑road transport but shortened overall length to pass the arch and manoeuvre within the courtyard.
Roof structures were engineered to support dry coolers, and the mechanical/electrical plant was integrated at the factory. The MDC was placed on pads inside the courtyard, adjacent to the main building for short network runs and simplified security.
Key features
— Siting & logistics
Modules sized to clear the arch; standard width retained for road legality; yard installation with no façade reconstruction.
— Power
Modular UPS providing ~10‑minute autonomy at design load; automatic transfer to on‑site generator; 2N power distribution to racks.
— Fire & safety
Early‑warning smoke detection, clean‑agent fire suppression, non‑combustible interior finishes.
— Security & monitoring
Role‑based access control, CCTV, environmental and plant monitoring with alerting.
— Cooling (deployed)
Three cabinet CRACs with indirect liquid free‑cooling and DC‑inverter fans/compressors; N+1 redundancy.
IFC mode uses ambient conditions to reject heat via roof‑mounted dry coolers without bringing outside air into the IT space.
Custom engineering
Short‑body modules
Custom shorter‑than‑ISO length with structural reinforcement allowed navigation through the arch and tight inner yard.
Engineered roof & joints
Purpose‑built roof with slope, load bearing for dry coolers, and weather management; joining nodes designed for precise mating and long‑term rigidity.
Results
Energy efficiency
IFC mode enables compressor‑off operation through much of the year in this climate, reducing electrical consumption vs. DX‑only.
Urban fit
Delivered resilient capacity inside a courtyard without altering the historic façade or requiring oversize transport.
Lifecycle flexibility
The MDC remains redeployable; modules can be extracted the same way they entered.
Specs snapshot
Racks
5×
42U
IT load
35 kW (this
deployment)
Cooling
Indirect free cooling (dry coolers on roof), N+1, DC‑inverter controls
Power path
2N distribution; modular UPS; ~10‑min autonomy at design load; on‑site generator integration
Fire & safety
Early smoke detection; clean‑agent suppression; non‑combustible interior materials
Security/monitoring
Access control, CCTV, infra & environmental telemetry with alarms
Business value and fit
Value
Lower OPEX during cool/cold seasons without compromising cleanliness of the white space; reusable asset that avoids stranded CAPEX in historic cores.
Ideal for
Dense urban sites with access constraints (archways/back‑lots).
Not ideal for
Hot climates with limited cool months.