HCTGS v34 米国 — 水・エネルギー・産業基盤 第1部+2部+3部

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Examine the thermal cascade's thermodynamic feasibility and the open parameters for scale-up.

🏢実務担当者:Consider the financing model for infrastructure projects and the potential for integrated water-energy systems.

🏛政策担当者:Note the proposal's implications for regional water security and industrial policy, though evidence is conceptual.

Abstract This is a three-part concept publication describing how a seawater thermal cascade could be applied to the water, energy and industrial siting problems of the United States. It is prior art, offered for independent assessment. The individual mechanisms it rests on are established industrial practice and are cited as such; what awaits measurement is their combination at scale, and the open parameters are named explicitly along with the two-stage installation that would settle them. THE ARCHITECTURE HCTGS is a seawater-driven thermal cascade housed in a hollow tower or a shaft bored into rock. Magnesium burns at the base inside a narrow ceramic core; seawater steam is injected tangentially at twenty to thirty times the mass of the flame at 100–110 °C, and the column rotates. At the top, chilled recirculated distillate is sprayed as fine mist and the steam condenses in flight, collapsing by a factor of 1,600 near atmospheric pressure and approaching 7,700 at the sub-atmospheric design point. That collapse draws the next mass of steam upward without a pump. Heat leaves the system through eight descending temperature stages from 1,500 °C down to the seawater intake temperature, each of which is a separate product: ceramic and alloy sintering, semiconductor process heat, thermochemical water splitting, electricity, district and process heat, controlled-temperature aquaculture, and compute or district cooling. Fresh water is the residual. The burner is treated throughout as a momentum source rather than a heat source. Water flashed against a ceramic wall at 1,500 °C leaves the nozzle at approximately 900 m/s — Mach 0.9 at that temperature — and mixes into roughly twenty-five times its own mass, which reduces the column to about 40 m/s while conserving the same momentum. This reconciles two figures that appear contradictory in earlier versions of this series. PART 1 — THE DEFICIT AND WHERE IT STARTS The United States has no national water deficit; it has concentrated regional ones. Sizing a replacement supply against withdrawals rather than against consumption overstates the requirement by roughly a factor of three, because thermoelectric cooling withdraws large volumes and returns approximately 96.5 percent of them (USGS Professional Paper 1894D). National consumptive use across the conterminous states is approximately 114 billion cubic metres a year. The documented structural deficit of the West — Colorado Basin over-allocation, High Plains over-extraction, Central Valley groundwater overdraft — totals 10.5 to 17.0 billion cubic metres a year, which is 30 to 50 towers at 0.365 billion cubic metres per tower-year. Higher rungs are given as a scale rather than as a proposal: 310 to 360 towers cover national consumptive use, and 900 to 1,200 would run the country's water without dependence on rainfall schedule or snowpack. That upper figure is derived twice independently — from USGS withdrawal figures with an evaporative demand increment, and as the United States share of a previously published global calculation. The deficit is treated as a scheduling problem before a quantity problem. The West runs on snowpack as a free reservoir; warming converts the same precipitation into a spring pulse that reservoirs must release for flood control, leaving the summer short. Subsidence is treated as irreversible loss of storage capacity rather than as loss of water: clay compaction between water-bearing layers does not reopen when the water table rises, so a year of delay costs storage rather than time. Part 1 also covers the two coastal geographies and their different answers, the interior as a distribution problem with a two-to-three-hundred-kilometre ceiling, mineral programming of irrigation water and interception at drainage and outfall point sources, the wildlife pond network, the precedent structure of TVA, the Delta Works and Hoover Dam, and a two-stage pilot: a 100–150 metre burner-driven physics rig, followed by an industrial pilot on an existing Gulf coast site with existing brine, waste heat and permitting history. PART 2 — WHO PAYS AND WHO OWNS IT Water is the last product out of the cascade, and the heat, cooling and minerals have paid for the installation before it appears. The feed stream and the cooling stream are the same water: the cooling customer pays to have heat removed and in doing so pre-warms the feed. The financing structure proposed inverts the current arrangement between compute operators and host communities. Instead of a tax abatement, the offtaker finances the installation and the distribution network renovation, and the community contributes the permit and holds an equity share. Conditions are stated: foreign capital without foreign control of the source, equity in the works rather than authority over the supply, and community equity through a standing instrument rather than a side agreement. Land value is treated in two separate figures that are not added. USDA land values show irrigated cropland at three to four times dryland cropland and four to six times pasture across the interior West, an uplift of roughly USD 3,000–5,500 an acre. One tower irrigates 100,000 to 150,000 acres and therefore converts USD 300–825 million of land value once, before selling anything. Separately, 55 to 58 million acres of existing irrigated land stop depending on an aquifer. Part 2 also covers construction methodology and schedule (raise-boring, presplitting and vertical crater retreat with tunnel mucking; 3–4 years for a hybrid shaft-and-tower first installation, thirty towers in 15–20 years), the reshoring of energy-intensive materials industry, the regeneration of declining petrochemical perimeters, the magnesia market ladder with an explicit sequence between existing and created markets, the towns that are already built and partly still serviced, and a new settlement described by siting conditions rather than by address. PART 3 — WHAT ROCK BUYS The United States produced magnesium from seawater at Freeport, Texas from 1941 to 1998 and has essentially no primary magnesium production today. Independent programmes funded by the Department of Defense and by academic institutions are working on the same problem, and their published assessment of the bottleneck — dehydration of magnesium chloride rather than the electrolysis itself — matches the mechanism this architecture addresses with process heat. Two electrolysis routes are described and kept distinct: the chloride route with chlorine recirculated internally as reagent, industrially proven, and the solid oxide membrane route from the oxide, which avoids the dehydration cost block entirely but is at laboratory to pilot maturity. The cascade produces both feedstocks. Rock is treated as relocating a vulnerability rather than removing one. Two hundred metres of overburden closes one attack surface and concentrates the others; what it adds on its own account is thermal inertia, weather independence and controlled ground. The binding constraint on an enclosed installation is heat rejection rather than excavation, because rock conducts poorly and a buried exchanger warms its own surroundings over a season. Part 3 also covers procurement, agency mapping, quantum computing shielding in granite, distribution geometry as security, and remote island and Alaskan installations where the smallest configuration has the largest relative effect. METHOD AND DISCLOSURE STATEMENT Every figure is given as a range with the assumption named. Electricity is stated at two ends of a documented operating window — a conservative planning figure and the design figure published earlier in this series — because they describe different things at the same water throughput. Electricity and hydrogen are alternative uses of the same capacity and are never added. Construction and operating employment are separate figures and are never added. Mineral output is stated as capacity rather than revenue beyond the point where fleet output exceeds existing markets. No novel contribution is claimed in these three articles. Every mechanism referenced is already on the public record in earlier versions of this concept series, and the construction methods described are established mining practice. The one mechanism developed during this work — submerged oxyfuel combustion for brine concentration without pyrohydrolytic acid release — is published separately at 10.5281/zenodo.22050748 because it applies to thermal brine treatment generally. This publication is prior art. Its purpose is to place these architectures on the public record with a date so that no party can obtain exclusive rights over them. The configuration is offered for reading, citation and non-commercial use under CC BY-NC-ND 4.0. Commercial implementation requires a separate licensing agreement.

• Zenodo https://zenodo.org/records/22088469first seen 2026-08-25 04:11:51 · last seen 2026-08-27 04:34:28