Ice Pigging Ensures Efficiency in Data Centre Cooling Loops

Using a controlled ice slurry, Ice Pigging dislodges and transports accumulated deposits out of the system, helping restore pipe cleanliness without the need for conventional mechanical pigging. Depending on the application, Ice Pigging may also reduce the need for chemical cleaning and the associated water, chemical and operational demands.

Protecting cooling performance matters. 

Ice Pigging provides an opportunity to clean suitable cooling circuits while minimising disruption to the wider operation. Each application is assessed individually to establish system suitability, cleaning requirements and the potential benefits.

Why Do Data Centres Need Pipe Cleaning? 

Data centre cooling infrastructure is operating under unprecedented thermal loads. As server densities rise to accommodate high-performance computing and AI workloads, heat rejection systems are pushed to their absolute limits. 

Behind every row of racks sits a complex chilled water circuit where even minor hydraulic or thermal bottlenecks can cascade into severe operational penalties. 

Over time, closed and semi closed chilled water loops inevitably suffer from internal degradation: biofilm accumulation, particulate settlement, scale formation, and pipe wall corrosion. 

Left unaddressed, these deposits quietly erode system efficiency - forcing chillers to work harder, driving up pumping energy, and compromising thermal safety margins. 

While traditional cleaning relies on high-volume water flushes or aggressive chemical treatments, Ice Pigging offers a low-risk, mechanical alternative engineered specifically for complex, high consequence pipework.

How Does Biofilm Affect PUE and Thermal Transfer in Data Centres? 

When internal fouling builds up in a primary or secondary cooling circuit, the operational effects (and costs) are significant: 

• Insulation Effects: Deposits on heat exchanger plates and pipe walls create a barrier to heat transfer. To achieve the same Delta T, chillers must run at lower setpoints, directly inflating Power Usage Effectiveness (PUE). 
• Hydraulic Head Loss: Narrowed pipe diameters and fouled strainers increase friction loss. Pumping systems must draw significantly more kWh to maintain the required volumetric flow rate. 
• Microbial Risks & Hotspots: Biofilm layers shield anaerobic bacteria, accelerating Under-Deposit Corrosion (UDC) and creating local thermal hotspots that frustrate automated control loops. 

For a facility bound by strict SLA uptime guarantees, these are not minor maintenance issues - they are direct threats to operational reliability and costs.

How Does Ice Pigging Navigate Complex Cooling Geometry in Data Centres?

Ice pigging utilises an ice crystal slurry pumped directly into the pipeline under controlled pressure. Acting as a soft, continuous "pig," the slurry generates high shear stress along the inner pipe wall, scouring away biofilm, loose scale, and settled debris from inside the pipe. 

Unlike rigid mechanical pigs or foam swabs, the ice slurry is fully deformable. It effortlessly navigates: 

• 90-degree elbows and tight-radius bends 
• Step changes in pipe diameter and necked-down headers 
• In-line valves, T-junctions, and complex manifold geometry 

The primary operational risk with traditional solid pigging in critical infrastructure is the pig lodging in an unseen obstruction. With Ice Pigging, if flow is ever interrupted or a pressure spike occurs, the pig simply melts, leaving the circuit completely safe and clear. 

How Does Ice Pigging Protect Data Centre Cooling Systems:

Why Should Data Centres Use Ice Pigging? 

As outlined above, Ice Pigging has the answers to multiple challenges faced by data centres. 

Data centre operators are facing intense scrutiny from regulators, investors, and local water authorities to minimise resource consumption. Ice pigging directly aligns with corporate sustainability targets supporting the environmental, social and governance (ESG) mandates around water, energy and chemical reduction. 

As thermal management becomes the central bottleneck in data centre scaling, maintaining pristine internal pipework is essential. Ice pigging provides a proven, rapid, and sustainable method to clear internal fouling, safeguard hardware longevity, and keep cooling loops running at peak performance. 

Pre-commioning and De-comissioning Pipework

Ice Pigging effectively removes construction debris and helps ensure pipelines are in excellent condition during any pre-commissioning of systems. 

Similarly Ice Pigging can be used to efficiently clean pipework during de-comissioning processes, preparing legacy pipework for any upgrades.  

Which Data Centre Cooling Systems Can Benefit from Ice Pigging? 

Ice Pigging can be considered for a range of cooling water pipework, subject to the system design, materials and configuration. 

Potential applications include: 

• Chilled-water circuits: Primary and secondary cooling distribution pipework, where deposits can restrict circulation and affect system performance. 
• Condenser-water circuits: Suitable sections of pipework within heat rejection systems, where accumulated solids, biofilm and other deposits may affect flow. 
• Liquid-cooling distribution: Selected pipework serving direct to chip and other liquid cooling systems, subject to pipe diameters, manifold design, valves and component sensitivity. 
• Associated cooling infrastructure: Suitable connecting pipework and distribution sections where conventional flushing may not provide the required physical cleaning action. 

Every application requires an individual assessment of the complete flow path, including pipe diameters, materials, valves, fittings and sensitive components. This is necessary to establish the suitability of Ice Pigging as a solution.

Interested in assessing your chilled water loop efficiency? Contact our engineering team now to discuss a baseline assessment or site feasibility review.