Aligned Twin V-Nose Coastal Defence Geometry for Thermal Cascade Installations (NC-TWV-1)

ABSTRACT Aligned Twin V-Nose Coastal Defence Geometry for Thermal Cascade Installations NC-TWV-1 · Standalone disclosure · Open prior art A plan-form geometry for the coastal defence of a fixed industrial installation exposed to tsunami run-up and extreme storm surge, disclosed as open prior art so that it remains available to anyone who builds such an installation. The arrangement. Two concentric perimeter walls, each carrying a wedge-shaped nose in plan directed toward the open sea, with the two noses aligned on a common axis. Flow divided by the outer nose leaves it on two divergent paths; because the inner nose stands on the same axis, those paths meet the inner wall obliquely along its flanks rather than normal to its face at any point. A single V-nosed wall deflects. Two aligned V-nosed walls deflect, and then present no normal-incidence face to what the first deflection produced. Between the walls lies a working yard designated as a sacrificial zone. Prior art, declared. Multi-layered coastal defence is long-established practice and was adopted as national doctrine in Japan following the 2011 Tōhoku event, with older antecedents in fortification. Overtopping-tolerant seawalls that retain their mass as a submerged breakwater, the designation of a foreshore zone as expendable, wedge-form flow splitters such as bridge pier cutwaters and ice aprons, and mass gravity wall construction keyed into bedrock are all standard and are claimed by no part of this disclosure. Established multi-layer defence lines run in plan parallel to the shoreline and receive the front approximately normal to their face. The claim here concerns arrangement in plan: both lines treated as flow-splitting bodies, aligned so that the geometric function of the first is completed by the second. Configuration disclosed. Outer wall crest at 20 m above mean sea level, standoff not less than 100 m, designed to be overtopped rather than overturned. Inner wall crest at 40 m, gravity structure keyed into bedrock, base width 12–15 m, seaward batter 1:1.5, designed for static head plus dynamic pressure from a 35 m run-up, encircling tower footprint, cistern, electrolyser hall and control building. Inter-wall ring graded to drain seaward with a rough graded-stone surface rather than a bound pavement. These figures are the configuration for which the disclosure is made rather than universal values; what carries across sites is the geometry — two aligned wedges with a sacrificial ring between them. Sacrificial zone doctrine. The zone carries only what can be lost without consequence to site safety. Two conditions govern placement: nothing in the zone is required for an orderly shutdown, and nothing in it contains fluids or materials whose release under scour would contaminate the site or the water beyond it. An event reaching the zone will scour it, and the design assumes it will; the loss is operational rather than structural. What awaits measurement. Six parameters are stated for hydraulic or numerical modelling: deflection efficiency against wedge half-angle and incidence angle; degree of aeration at the outer crest and the resulting pressure reduction relative to a linear outer line of equal elevation; residual run-up at the inner wall and its distribution under oblique incidence; energy dissipation across the inter-wall zone against surface roughness and grade; behaviour during the drawdown phase; and performance against a front arriving off-axis. The last is the case on which the claim stands or falls, and it is stated in the disclosure rather than left to be discovered as an omission. Applicability. Disclosed for fixed coastal installations that cannot be relocated inland without defeating their own architecture, the intake requiring the sea and the distribution head being obtained from structure rather than ground. Applicable to any coastline where design tsunami or extreme surge run-up is material, including the northern Chinese coast and both Indian coasts — the latter carrying documented exposure through the Makran Subduction Zone in the west and the 2004 Indian Ocean event in the east. Nothing in the geometry is specific to a thermal cascade; it applies equally to any fixed coastal industrial installation on such a shore. Status. Concept disclosure published as defensive prior art, described at the level of arrangement and proportion. It is not an execution design, and no structural calculation is offered or implied. Licence. CC BY-NC-ND 4.0. Non-commercial use free with attribution; commercial implementation requires a separate agreement.