CoolLogic™
Pelham Data Centre's operational approach to energy efficiency and sustainability — delivering measurable results without capital expenditure.
ESG-Led Optimisation of Legacy Data Centre Environments
CoolLogic™ is Pelham Data Centre's ESG-led approach to optimising legacy data centre environments to meet modern operational, environmental, and efficiency expectations—without capital expenditure.
By auditing live white space environments and applying established Operational Best Practice, PDC delivers measurable reductions in energy consumption and improved Power Usage Effectiveness (PUE), avoiding unnecessary asset replacement while reducing environmental impact.
| Client | Confidential |
| Location | UK |
| Project Type | ESG Optimisation |
| Services | Operational Best Practice, Cooling Optimisation, Energy Efficiency |
| Investment | Zero CAPEX |
| Status | Completed |
What CoolLogic™ Delivered
ESG Audit
Comprehensive review of the live white space environment to identify cooling over-provision and energy inefficiency opportunities.
CRAH Fan Optimisation
Staged reduction of CRAH fan speeds from 75% to 55% with continuous thermal monitoring, decommissioning surplus units safely.
Chilled Water Efficiency
Incremental increases to chilled water flow temperatures under controlled conditions, reducing chiller lift and compressor workload.
Continuous Monitoring
Two-week monitoring periods at each optimisation stage with ampere draw measurements to validate performance and ensure thermal compliance.
Zero Disruption Delivery
All optimisation work completed in the live customer environment with no service interruption and maintained thermal compliance throughout.
Energy Benchmarking
Comparative energy analysis across equivalent periods verifying measurable kWh reductions in both technical and mechanical consumption.
Customer Hall Optimisation
An ESG review of the customer hall identified significant cooling over-provision, presenting an opportunity to reduce energy demand while maintaining full thermal resilience.
Objectives
- Reduce cooling-related energy consumption
- Eliminate surplus operational capacity
- Maintain compliant temperatures in a live environment
- Improve efficiency without impacting service availability
Customer Hall — Capacity & Cooling Overview
The Opportunity
The audit revealed that the current IT load demand of 598kW against an IT capacity allocation of 1,395kW indicated substantial over-engineering of the cooling provision. With 22 CRAH units installed at 90kW cooling capacity each and a current cooling requirement of 690kW, only 8 CRAH units were required to meet demand.
This over-provision, while resilient, presented a significant and unnecessary energy overhead. The CoolLogic™ methodology targeted this surplus through a controlled, phased optimisation programme.
The Approach
Rather than replacing infrastructure, Pelham proposed a dual approach: reducing CRAH fan speeds in stages while decommissioning surplus units, combined with chilled water temperature adjustments — all without capital expenditure and without interrupting live operations.
Phased CRAH Fan & Chilled Water Optimisation
A controlled, data-led approach was implemented to reduce CRAH fan speeds and decommission surplus units, while continuously monitoring rack inlet temperatures to ensure full thermal compliance throughout.
Raising the chilled water flow temperature by a managed few degrees over a fixed monitoring period resulted in significant energy savings. Higher flow temperatures reduce chiller lift and compressor workload, directly lowering electrical demand.
While external ambient temperatures influence absolute performance, comparative analysis across equivalent periods demonstrates clear efficiency improvements.
Meaningful Sustainability Without Capital Investment
CoolLogic™ demonstrates how operational excellence can deliver meaningful sustainability outcomes without capital investment or service disruption.
Environmental
- Significant reduction in electrical energy consumption
- Lower cooling demand and associated carbon emissions
- Extended lifecycle of existing infrastructure, reducing embodied carbon
Social
- No service interruption within live customer environments
- Maintained thermal compliance and operational resilience
- Supports customer ESG and sustainability reporting requirements
Governance
- Data-driven decision making with auditable results
- Repeatable, best-practice operational framework
- Improved transparency in energy performance and efficiency metrics
"Through intelligent operational optimisation, CoolLogic™ enables data centres to improve efficiency, reduce environmental impact, and strengthen ESG performance—all without CAPEX and without compromising resilience."
Apr–Jul 2023 vs 2022
Ready to Optimise Your Data Centre?
Pelham Data Centres' CoolLogic™ programme delivers measurable ESG improvements and energy savings without capital expenditure. Let's talk about how we can support your sustainability ambitions.
