ZutaCore Helped Lead the Development of OCP’s Dielectric Coolant Fluid Base Specification v1.0

The Open Compute Project (OCP) has published the Base Specification for Two-Phase Dielectric Fluid-Based Heat Transfer Fluid, Version 1.0.0. The specification establishes an open, vendor-agnostic framework for dielectric fluids used in cold plate-based, two-phase liquid cooling systems, with the goal of improving safety, reliability, interoperability, scalability, and efficiency across the ecosystem.

From an Industry Need to a Published Specification

The work began with an OCP request to develop a base specification for dielectric coolant fluids used in two-phase cold plate cooling. ZutaCore led the drafting effort and then brought relevant companies from across the cooling and fluid ecosystem into the review process. The draft was discussed, submitted to OCP, and revised in response to community feedback before publication.

That collaborative process is central to OCP: practical industry experience is converted into an open framework that multiple vendors and operators can use.

What The Specification Covers

The specification focuses exclusively on dielectric fluids used for thermal management in cold plate-based liquid cooling systems in the OCP ecosystem. The scope includes fluid properties and selection criteria, material compatibility, safety and environmental considerations, handling and integration requirements, operational performance, and test and validation requirements.

At the system level, two-phase cooling uses the fluid’s phase change to remove heat. The liquid absorbs heat and boils, the vapor travels to a condenser, and the condensed liquid returns to the loop. Because the fluid is electrically non-conductive, it can support cooling architectures designed to reduce the consequences associated with leaks near electronics.

Why An Open Fluid Baseline Matters

As compute density and chip heat loads rise, liquid cooling is becoming a core infrastructure decision rather than a specialized add-on. In a two-phase system, fluid characteristics directly influence thermal performance, materials compatibility, reliability, serviceability, safety, and environmental impact. A common baseline gives data center operators, equipment manufacturers, system integrators, and fluid suppliers a shared language for evaluating those characteristics.

• Interoperability - A vendor-neutral framework can help components and fluids be evaluated against common requirements rather than isolated proprietary criteria.

• Supply-chain flexibility - Clear requirements can support broader participation by fluid and component suppliers and reduce barriers to multi-vendor ecosystems.

• Reliability and compatibility - Defined expectations for fluid integrity and wetted-material compatibility help address corrosion, contamination, and system-failure risks.

• Efficiency and sustainability - The specification supports high-density thermal management while emphasizing energy efficiency, reduced water use, responsible material selection, and the potential for heat reuse.

ZutaCore’s Role

For ZutaCore, contributing to this specification is a natural extension of our work in waterless, two-phase direct-to-chip liquid cooling. Our experience designing and deploying systems that rely on dielectric heat-transfer fluids gave us a practical perspective on the properties and requirements that matter in real operating environments.

The objective was to help establish an open, vendor-agnostic baseline that the broader industry can use, challenge, improve, and build upon. Open specifications create common expectations, make technical discussions more precise, and help emerging cooling technologies move toward repeatable deployment at scale.

A Foundation For The Next Generation of Liquid Cooling

OCP’s publication of Version 1.0 is an important milestone, but it is also a starting point. As processors, cooling architectures, fluids, materials, and environmental requirements continue to evolve, the industry will need shared technical frameworks that evolve with them.

Read The Specification

The full OCP document is available here: Dielectric Coolant Fluid Base Specification v1.0

FAQ

Does the specification apply to immersion cooling?

No. Its scope is dielectric fluids used in two-phase cold plate-based liquid cooling systems. It does not define requirements for immersion cooling fluids.

Who is the specification intended for?

The document identifies data center operators, IT equipment manufacturers, system integrators, and fluid suppliers seeking OCP-compliant liquid-cooled solutions as intended users.

What is the purpose of Version 1.0?

It provides an open baseline for the safe, reliable, standardized use of two-phase dielectric fluids across vendors and platforms, while supporting scalable and energy-efficient cooling solutions.