{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","cell_id":"anchoring_reset__computer_science","arm":"CONSTRAINED_HIGH","candidate_id":"anchoring_reset__computer_science__CONSTRAINED_HIGH","decision":"PROPOSAL","abstention_reason":null,"proposal":{"schema_version":1,"experiment_id":"eoa_inverse_innovation_exp12_substrate_denial72_20260805","cell_id":"anchoring_reset__computer_science","arm":"CONSTRAINED_HIGH","candidate_id":"anchoring_reset__computer_science__CONSTRAINED_HIGH","proposal_index":1,"version":0,"title":"Passive Thermal-Baseline Reset Valve for Liquid-Cooled Compute Racks","problem":"A liquid-cooled compute rack can retain a branch-flow setting derived from the processors' nameplate thermal-design powers at initial commissioning. After hardware, workload shape, or coolant supply conditions change, that inherited number can remain the starting point for cooling estimates and valve settings even when the rack's actual heat rejection differs. The resulting physical configuration is anchored to the old estimate rather than the current thermal state.","actors":["data-center thermal engineer","facility operator","liquid-cooled compute rack","cold plates and branch piping","coolant pump and neighboring rack branches"],"observable_state":"The installed manual balancing valve remains at its commissioning mark derived from nameplate power, while directly observed supply-to-return temperature difference or outlet temperature changes across rack operating states. A concerning state is a persistent high return-temperature difference despite available pump capacity, or persistently low temperature difference accompanied by unnecessary branch flow. The candidate is inapplicable if the inherited setting continues to match current thermal demand within the declared operating band.","consequence":"An inherited low-flow reference can reduce thermal margin or provoke hardware throttling; an inherited high-flow reference can consume pumping capacity and deprive other branches of pressure margin. Either direction can propagate the stale reference into cooling-capacity and rack-placement decisions.","affected_objective":"Maintain rack thermal margin and stable coolant allocation under changing compute heat loads without making a copied-forward nameplate estimate the continuing physical flow reference.","intervention":"Replace the rack branch's fixed commissioning orifice with a non-networked, fail-open differential-temperature valve. Fluid-filled bulbs clamped to the supply and return pipes act on opposed bellows; their pressure difference moves a piston that opens the valve as supply-to-return temperature difference rises and closes it as the difference falls. A calibrated spring defines a safe mechanical operating band, a parallel relief bypass preserves minimum flow, and a mechanical telltale collar records the stroke envelope. The original commissioning position remains marked on the valve body for comparison but is mechanically disconnected from the actuator. Thus the current heat-transfer state, rather than the inherited nameplate number, becomes the operative reference.","structural_mapping":[{"archetype_element":"Initial reference and anchor visibility","domain_realization":"The nameplate-derived commissioning flow is embodied by the original manual-valve position and retained as a visible mark on the replacement valve body."},{"archetype_element":"Independent estimate","domain_realization":"Opposed supply and return bulbs generate a differential thermal signal without receiving the nameplate value or original valve position."},{"archetype_element":"Alternative reference set","domain_realization":"The actuator encounters the rack's physical temperature difference across multiple actual heat-load and supply-temperature states, rather than adjusting every state from one commissioning number."},{"archetype_element":"Calibration evidence","domain_realization":"Before installation, the bulbs, bellows, spring, and valve stroke are checked in controlled-temperature baths and a closed hydraulic loop against traceable thermometers and a flow meter."},{"archetype_element":"Recalibrated reference","domain_realization":"The mechanically reached stroke band and corresponding branch flow replace the fixed commissioning opening as the rack's operating reference."},{"archetype_element":"Downstream anchor trace","domain_realization":"The telltale collar exposes the new stroke envelope beside the old mark, allowing later cooling-capacity review to identify assumptions still derived from the original opening."},{"archetype_element":"Uncertainty band","domain_realization":"Spring hysteresis and marked upper and lower stroke limits embody a permissible operating band rather than a falsely precise replacement point."}],"mechanism_mapping":[{"mechanism_slug":"blind_independent_estimates","role":"The opposed bulbs form a physical estimate of current thermal demand while being causally isolated from the old nameplate-derived setting.","counterfactual_removal":"Without the independent differential-temperature element, valve position must again come from a fixed manual estimate or an electronic controller, so the passive anchor reset disappears."},{"mechanism_slug":"multiple_anchor_comparison","role":"The valve responds to the difference between contemporaneous supply and return conditions across successive rack states, preventing one old absolute value from monopolizing control.","counterfactual_removal":"Removing the supply reference leaves only absolute return temperature; changes in facility supply temperature can then masquerade as changes in rack heat rejection."},{"mechanism_slug":"baseline_recalibration","role":"Thermal expansion and hydraulic throttling continuously replace the copied-forward commissioning opening with a stroke determined by current physical conditions.","counterfactual_removal":"Leaving the fixed orifice in place preserves the inherited flow baseline regardless of changed heat-transfer conditions."}],"causal_chain":["A nameplate-derived flow estimate is physically encoded as a fixed commissioning valve position.","Rack hardware, heat-load pattern, or coolant supply conditions change while the fixed position persists.","Supply and return bulbs independently convert local temperatures into opposing fluid pressures.","The resulting pressure difference displaces the bellows and piston without consulting the old setting.","Valve area and branch flow change through mechanical throttling, tending to reduce excessive temperature difference while the bypass preserves minimum flow.","Spring hysteresis prevents continual small movements, and the fail-open bias limits the consequence of actuator loss.","The rack's current thermo-hydraulic state becomes the operative physical reference; the telltale collar preserves a visible comparison with the inherited anchor."],"baseline":"A manually balanced branch valve is set during commissioning from summed nameplate thermal-design powers and expected coolant temperature rise. It remains at that opening until an operator performs another measurement and adjustment.","nearest_rivals":["A motorized valve driven by temperature sensors, a programmable controller, and control software; it can address the same thermal mismatch but makes computation the operative control loop.","Periodic manual rebalancing with clamp-on temperature and flow instruments; it provides direct evidence but depends on recurring measurement, interpretation, and procedural follow-through.","Constant high-flow overprovisioning or a larger pump; it avoids some low-flow cases but consumes shared hydraulic capacity rather than resetting the rack-specific baseline.","Hardware or firmware power capping at the processors; it constrains heat generation instead of adapting coolant flow to the actual rack state."],"remaining_contrastive_claim":"Where a fixed rack-flow setting is materially inherited from an obsolete nameplate estimate and branch temperature difference remains a usable proxy for cooling demand, a mechanically actuated differential-temperature valve can remove that fixed estimate from the operative causal path. The claim is not that it outperforms electronic control generally, nor that it corrects fouling, trapped gas, pump shortage, or poorly coupled cold plates.","authority_safety":{"decision_authority":"The facility thermal engineer may authorize the isolated test and any later rack pilot; the site operations owner retains production deployment authority.","authorized_first_step":"Bench-test one valve on an isolated water-glycol loop with resistive heat input, a relief bypass, and the intended supply and return pipe geometry; no production rack modification is authorized in the first step.","excluded_actions":["connection to a production coolant loop during the first test","removal or obstruction of the minimum-flow bypass","defeat of pressure relief, leak containment, or over-temperature protection","use of a networked controller or software command as the valve's operative actuator","alteration of server firmware, processor power limits, or workload scheduling","deployment to multiple rack branches before hydraulic-interaction testing"],"halt_rollback":"Stop on leakage, valve chatter, failure to return toward fail-open, outlet temperature beyond the predefined hardware limit, or branch pressure outside the loop rating. De-energize the heater, isolate the prototype, open the bypass, and restore the fixed-orifice test section; a later rack pilot must retain isolation valves and the original balancing valve for the same rollback."},"negative_tests":{"strongest_counterevidence":"The temperature or flow anomaly remains after replacing the inherited valve setting, and inspection instead finds cold-plate fouling, trapped gas, failed thermal interfaces, inadequate pump head, or chip-level hotspots that bulk return temperature does not represent.","problem_falsifier":"Across the declared rack states and supply temperatures, the original nameplate-derived opening already keeps temperature difference, outlet temperature, and pressure within the accepted bands without systematic over- or under-flow; then inherited-reference distortion is not the operative problem.","intervention_falsifier":"On the isolated loop, the passive valve fails to keep outlet temperature and pressure within the predeclared safe bands relative to the fixed-orifice condition, or it exhibits sustained oscillation, excessive lag, leakage, branch starvation, or failure of the fail-open transition.","risks":["Thermal and mechanical lag may allow a transient temperature excursion before the valve opens.","Bellows or piston stiction can preserve a new unintended physical anchor.","Valve movement can change pressure available to neighboring rack branches.","Bulk supply-to-return temperature difference can conceal a local cold-plate or chip hotspot.","A leak at added fittings can damage nearby computing or electrical equipment.","Hysteresis that is too narrow can cause chatter; hysteresis that is too wide can delay correction.","A fail-open fault can consume excess branch flow even while protecting the tested rack."]},"next_evidence_step":"Run a bounded isolated-loop comparison using the original fixed orifice and one prototype valve at three preset resistive heat inputs and two supply temperatures, holding each condition for 30 minutes. Use direct thermometers, a flow meter, a pressure gauge, and a local strip-chart recorder; predeclare outlet-temperature, pressure, oscillation, leak, and fail-open criteria. The step ends after the six conditions and one simulated actuator-loss test, regardless of outcome.","prior_art_status":"UNSEARCHED","diversity_from_prior_proposals":"Not compared with any prior proposal because runtime isolation forbids inspection; internally, this candidate is characterized by passive thermo-hydraulic actuation rather than software, analytics, or a decision workflow.","revision_record":{"parent_version":null,"progress_targets_addressed":["Construct one causally explicit computer-science-domain application of Anchoring Reset.","Make the essential intervention physical and independent of forbidden wrappers.","Specify serious rivals, falsifiers, safeguards, and a bounded evidence step."],"conceptual_changes":["Translated an inherited numerical cooling estimate into a physically encoded fixed-valve anchor.","Made current supply-to-return thermal difference the independent alternative reference.","Preserved anchor visibility through a mechanically disconnected commissioning mark."],"operational_changes":["Specified opposed fluid-filled bulbs, bellows actuation, spring hysteresis, fail-open bias, minimum-flow bypass, and mechanical stroke memory.","Restricted the first evidence step to an isolated bench loop."],"evidence_changes":["Limited initial evidence to direct temperature, flow, pressure, oscillation, leakage, and fail-open observations.","Made calibration and intervention failure criteria explicit without asserting an effect size."],"claim_changes":["Confined the claim to cases where the inherited fixed-flow reference is causal and differential temperature is a valid proxy.","Excluded electronic control, maintenance faults, pump shortage, and chip-level thermal faults from the contrastive claim."]},"substrate_contract":{"primary_allowed_process":"PHYSICAL_MATERIAL","counterfactual_independence":"If all software, algorithmic inference, databases, dashboards, reporting, incentives, authorization rules, and recurring procedures are removed after installation, the opposed bulbs still expand and contract, the bellows still move the piston, and the valve still changes coolant flow in response to physical temperature difference. Human authorization is required for safe installation and testing, but neither human enforcement nor computation produces the ongoing thermal-control effect.","forbidden_channel_audit":"The operative path contains no microcontroller, model, database, network, recommender, software command, analytic estimate, or human adjustment loop. The telltale collar and test recorder are observational aids only: removing them does not stop thermal pressure, mechanical displacement, or hydraulic throttling. The safety bypass, spring, and relief devices act directly through material and mechanical processes."}}}