# SAVRN Water-Free Cooling System: Sealed Loop, No Water Draw Source: https://savrn.com/solutions/water-free-cooling Markdown alternate of the page above; the site index is https://savrn.com/llms.txt --- ## Define it Liquid cooling describes how heat is collected from the equipment. Water-free describes the site's external water demand. They are not the same claim. A liquid-cooled facility with evaporative towers can be one of the largest water users in a county. SAVRN's standard is the second claim: no routine draw from the community water system for heat rejection, with the site water balance published. ## Design it Heat is collected at the chip by direct-to-chip cold plates and carried on a closed process loop to the heat-rejection plant. Rejection is dry: air-cooled or ground-coupled equipment sized for the local climate, with no evaporation in the design basis. The loop is filled once; makeup is for maintenance and sampling, not for consumption. The temperature of the return loop is high enough to be useful. Captured heat can warm the Intelligence Center, a greenhouse or a municipal building instead of being thrown to the sky. - Direct-to-chip cold plates on every rack; immersion where the workload calls for it. - Closed process loop with dry heat rejection sized for the climate. - Ground-coupled rejection where the geology supports it. - Heat capture and reuse on the campus loop. ## Verify it Every SAVRN site carries a water balance: what comes in, what it is for, and what leaves. Domestic use, fire protection, landscaping and loop maintenance are stated separately from process cooling so a community can see that the cooling number is zero and why. - Site water balance published with the design. - Makeup fluid for maintenance stated separately from process use. - Operating data kept on the SAVRN platform for the life of the site. ## Key details - Direct-to-chip liquid cooling on every rack, closed loop from chip to roof. - Dry heat rejection; no evaporative towers in the design basis. - No routine draw from community water for cooling. - Design PUE of 1.5 for the Atom block. - Useful heat captured and delivered to the campus. - Site water balance published and kept current. What it means for the community Water is the reason data centers get voted down. A SAVRN campus takes none of it for cooling, publishes its water balance, and gives the heat it makes to the buildings around it. ## How it is delivered ### Climate basis 1. Dry-bulb design conditions set the size of the rejection plant; evaporation is not an option in the model. ### Loop design 2. Cold plates, distribution units and the process loop are engineered with the Atom. ### Heat reuse 3. Campus loads that can use the return heat are identified and piped. ### Water balance 4. The site balance is written, published and tied to the permit. ### Verify 5. Commissioning confirms the loop is sealed and the balance holds; operating data proves it after. ## Questions people ask Is liquid cooling the same as water-free cooling? No. Liquid cooling is how heat is collected from the chips. Water-free is about the site's external water demand. SAVRN designs both: a sealed liquid loop and dry heat rejection with no routine community water draw. Does a closed loop ever need water? Yes, in small amounts for maintenance, sampling or component replacement. That makeup is stated separately in the site water balance so it is never confused with process consumption. What happens to the heat? It is captured on the campus loop and delivered where it is useful: the Institute, a greenhouse, a municipal building. What cannot be used is rejected dry. Does water-free cooling work in a hot climate? Yes. Dry rejection is sized for the local dry-bulb conditions, and ground-coupled rejection is used where the geology supports it. The design basis never assumes evaporation. ## All solutions [The SAVRN AtomInfrastructure](https://savrn.com/solutions/ai-factory)[Proton fuel-cell powerPower](https://savrn.com/solutions/fuel-cell-power)[Off-grid power and the energy islandPower](https://savrn.com/solutions/off-grid-power)[Water-free liquid coolingCooling](https://savrn.com/solutions/water-free-cooling)[Sovereign computeOperating layer](https://savrn.com/solutions/sovereign-compute)[The Training InstituteWorkforce](https://savrn.com/solutions/training-institute)[BoxcarPartner model](https://savrn.com/solutions/boxcar)[SidecarPartner model](https://savrn.com/solutions/sidecar) ## Go deeper [Water-free cooling, defined and verified](https://savrn.com/water-free-ai-data-center)[Data center water tracker](https://savrn.com/data-center-water-tracker)[Why immersion wins](https://savrn.com/blog/immersion-cooling-the-future-of-compute)[The Atom block](https://savrn.com/solutions/ai-factory)[The community-first framework](https://savrn.com/community-ai-data-centers) ## Next step Bring the site, the institution or the community. SAVRN shows how this piece fits with the rest. [Engage SAVRN](https://savrn.com/engage) ## See Water-free liquid cooling in the whole system. Every piece here is rendered and narrated on the System page, and the platform that runs it has a guided walkthrough. [Step inside the System](https://savrn.com/system) [Take the tour](https://savrn.com/tour)