INFINITY TURBINE LLC We specialize in designs, plans, licensing, consulting, design services, and surplus spare parts. We no longer manufacture turbines or CO2 systems. More Info...
TEL: +1-608-238-6001 (Chicago Time Zone ) USA
Email: greg@infinityturbine.com
The Six-Year Wall: Why AI Data Centers Can't Get Power— And Who Just Cracked the Problem Hyperscalers are racing to deploy gigawatts of AI compute, but the grid can't keep up and large gas turbines are backordered half a decade out. Infinity Turbine's Cluster Mesh Supercritical CO₂ system offers a radical alternative: modular, silent, trailer-deployable prime power that scales the way software does... More Info
Data Center 40 MW to 100 MW Using IT1000 Supercritical CO2 Gas Turbine Generator Silent Prime Power 1 MW (natural gas, solar thermal, thermal battery heat) ... More Info
Developing Rack Prime Power DC for AI Server Racks Sidecar 48V to 800V DC plus DC buffer for hyperscalers... More Info
The Shift from AC to DC Power Production for AI Data Centers AI data centers are pushing electrical infrastructure to its limits. The traditional AC power chain is no longer optimal for GPU-driven workloads. A DC-native architecture using Infinity Turbine’s Cluster Mesh system offers a path to higher efficiency, lower costs, and scalable modular power—potentially saving tens of millions per year at hyperscale... More Info
SMR and Cluster Mesh Supercritical CO2 Power System for Data Centers and AI Pairing Cluster Mesh Supercritical CO2 Power System with Small Modular Reactors enables hyperscalers to convert high-grade nuclear heat into ultra-efficient, dispatchable power with a compact, modular footprint tailored for AI-scale demand. More Info
ORC and Products Index Infinity Turbine ORC Index... More Info
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Comparing Supercritical CO₂ Rankine Receivers to Conventional Water Cooling in Data Centers IntroductionData centers traditionally rely on water-based cooling loops to remove heat from processors, GPUs, and dense server racks. As workloads from artificial intelligence and high-performance computing grow, these conventional systems are strained by rising heat fluxes and higher coolant return temperatures. Supercritical carbon dioxide in an Organic Rankine Cycle configuration introduces a new approach. By capturing waste heat at moderate temperatures, CO₂ can be expanded to recover energy while also functioning as a highly efficient cooling medium. This article compares CO₂-based receiver tanks with conventional water loops to assess their suitability for future data center cooling.Conventional Water-Based CoolingWater has long been the standard medium for liquid cooling due to its high heat capacity and availability. A typical water loop consists of pumps, piping, cold plates or immersion modules, and a large expansion tank. The expansion tank compensates for changes in volume caused by temperature fluctuations and ensures the pump has a steady supply.Advantages:Simple design, non-toxic, and abundant.High specific heat provides good thermal buffering.Limitations:Requires large expansion tanks compared to CO₂ receivers.Inefficient at low-grade heat recovery; heat is usually rejected, not reused.Water purity and corrosion inhibitors must be carefully managed.Supercritical CO₂ in a Rankine LoopIn a CO₂ Rankine cycle, liquid CO₂ is pumped, heated to supercritical conditions, expanded, and then condensed back to liquid. A receiver tank is installed at the condenser outlet. Its role is similar to the expansion tank in a water loop, but because of CO₂’s density and compressibility, the required volume is much smaller.For a two liter experimental loop:At 45 C turbine inlet temperature, the receiver size is about two liters.At 100 C turbine inlet temperature, the receiver size is about one liter.In practical designs, a one to two liter receiver provides ample margin for stability, charge balancing, and startup. This compact footprint is a stark contrast to the much larger expansion tanks required in water-based systems of equivalent capacity.Key DifferencesReceiver Size: A supercritical CO₂ receiver can be less than half the size of a water expansion tank for a similar duty loop, saving footprint in rack-level cooling modules.Heat Recovery: Unlike water systems that primarily reject heat, a CO₂ Rankine loop can convert part of the waste heat into usable power. This dual function adds value for energy-intensive data centers.Temperature Flexibility: Water loops typically operate below 60 C to avoid material stress and efficiency losses. Supercritical CO₂ loops can operate effectively at 45 C and 100 C inlet temperatures, aligning well with waste heat levels from GPUs and AI racks.Scalability: Smaller receiver tanks and compact CO₂ circuits make it easier to scale cooling skids to match rack density without large infrastructure changes.ConclusionConventional water loops remain a reliable and simple choice for data centers, but their expansion tanks are bulky and their cooling potential is limited to heat rejection. Supercritical CO₂ Rankine receivers, by contrast, offer compact size, higher flexibility, and the potential for power recovery. For data centers under pressure to reduce footprint and increase efficiency, supercritical CO₂ loops with well-sized receivers present a strong alternative to water-based cooling. |
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