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Publications

PUBLIC DELIVERABLES

Public Deliverables are project results that are publicly accessible and have been agreed upon in the contractual arrangement between the consortium and the funding bodies.

  • D2.1 Market analysis for Data Centers with two-phase immersion cooling & waste heat reuse (Download)

This deliverable presents the results of Task 2.1, which assesses data center markets in Austria, Norway, and Poland. It defines the relevant market segments in each country, identifies potential heat sinks, and examines the technical, spatial, and regulatory conditions that determine the feasibility of recovering excess heat. These findings provide the basis for defining key performance indicators in Task 2.2 and developing case scenarios in Task 2.3.

  • D2.2 Definition of use cases and KPI framework (Download)

The first part of this report presents the sets of key performance indicators (KPIs) defined to support the evaluation of the CoolHeatDC concept at different stages of the project, including theoretical assessments, experimental investigations, and techno-economic and business case analyses. The KPIs are based on the immersion-cooling recommendations developed by the Open Compute Project (OCP) and are complemented by additional indicators tailored to the specific scope of CoolHeatDC.

The second part presents large-scale use cases for the application of CoolHeatDC solutions in Austria, Poland, and Norway. These use cases are designed to complement one another while reflecting the characteristics of their respective national markets. They will primarily provide input to the business case analysis conducted in Work Package 6.

  • D3.1 Screening of natural working fluids for two-phase immersion cooling systems (Download)

This deliverable presents the results of Task 3.1: a theoretical screening of natural working fluids (NWFs) for the CoolHeatDC concept and selection of candidates for small-scale testing in Task 3.3. Water, carbon dioxide, ammonia, alcohols and hydrocarbons were assessed against more than 30 thermal, electrical, safety, environmental and health-related KPIs and compared with conventional synthetic-immersion cooling fluids. One candidate was selected from each fluid group: i) hydrocarbons, ii) low-pressure fluids, and iii) high-pressure fluids. Pentane is preferred among hydrocarbons for its strong dielectric performance, near-atmospheric operating pressure and comparatively favourable flammability and toxicity. Water is the obvious choice when it comes to low-pressure fluids due to its excellent heat-transfer performance and non-hazardous nature, although it requires sub-atmospheric operation and has poor dielectric properties. Mixing it with methanol or ethanol could mitigate these limitations. Carbon dioxide is selected from the high-pressure fluids because it is non-flammable, non-toxic and has superior dielectric properties, despite requiring very high pressures and supercritical operation under CoolHeatDC conditions.

This report presents the CoolHeatDC communication and dissemination strategy and outlines the activities planned to maximize the project’s impact. It will be updated throughout the project to reflect progress and evolving needs.

OPEN ACCESS PUBLICATIONS

The project team is committed to open communication and the widest possible dissemination of our results. Our scientific publications will be made available for download in this section.