Claim

The reported seawater-hydrogen system operated stably for 100 days at 20 kW, producing 3.8 Nm³ h⁻¹ hydrogen and 1.2 kg h⁻¹ freshwater; at 250 kW it produced 48 Nm³ h⁻¹ hydrogen and 31.6 kg h⁻¹ freshwater, with 14.4% higher electrical efficiency than alkaline electrolysis using freshwater alone.

Type QUANTITATIVE · truth-evaluable: yes · status at snapshot: ACTIVE · created seq 16032 · qualifiers {"population":"20-kW industrial pilot and 250-kW scaled system","source_edition":"336602f6-d3d9-8177-8f73-a74c878d2962"}

47 words; atomic claims are usually under 25a conjunction joins clauses that may be separately evaluablea comma-separated series may list several propositions

Referenced 99 times: checked 2, looked up by assistants 0, viewed 60, shared 37. A count of attention, not evidence.

Topics

Energy · 1efd24fe Technology · 1efd24fe

Assessment

Supported

Score: 0.9781 under ledger-default@0.3.0 at snapshot 27745

3 of 4 review checks done · 1 counted · 2 by the author only

2 independent evidence lineages · review checks 1 of 4 · stability HIGH

Main unresolved issue: 3 counted evidence items have no independence review; repeats of one origin may be counted as several coverage:29526bc5-3f22-89b3-ab1a-2ab1739dba48

Not yet independently audited.Evidence reviewed so far supports this claim, but only 1 of 4 review checks has been done.A quoted passage from nature.com was not found on the page when Galedra fetched it.

Why?

Strongest counted support: The study reports 100-day stable 20-kW operation and 250-kW scale-up with specified hydrogen, freshwater, and efficiency results. weight 2.000000 evidence

Suppressed as dependent: The passage directly reports 20-kW 100-day operation, 250-kW outputs, and the 14.4% efficiency comparison.

Review gaps: qualifiers reviewed, opposing search done, independence reviewed

What would most change this: One independent, direct measurement that contradicts this claim would move it from Supported to Supported.

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Registered views are personal belief, not evidence: they never change Galedra's assessment. Affiliations are self-declared and shown only for groups of 5 or more.

Checked as part of

Statements this claim was broken out of. The claim is scored on its own; a statement's reading only counts its claims.

“The reported seawater-hydrogen system operated stably for 100 days at 20 kW, producing 3.8 Nm³ h⁻¹ hydrogen and 1.2 kg h⁻¹ freshwater; at 250 kW it produced...” · 1 claim · 29 September 2026
“A seawater-to-hydrogen system coupled alkaline electrolysis with low-temperature desalination, demonstrating stable pilot operation and scaled hydrogen and...” · 2 claims · 29 September 2026

Evidence for

The study reports 100-day stable 20-kW operation and 250-kW scale-up with specified hydrogen, freshwater, and efficiency results.

From A 250-kilowatt system for co-production of hydrogen and fresh water from seawater Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The passage directly reports 20-kW 100-day operation, 250-kW outputs, and the 14.4% efficiency comparison.

From A 250-kilowatt system for co-production of hydrogen and fresh water from seawater Read 2026-09-29 Relevance DIRECT Steps 0 Counted
The Nature Energy report directly documents the 20-kW pilot's 100-day operation and the 250-kW scale-up outputs and relative efficiency improvement described in the claim.

From A 250-kilowatt system for co-production of hydrogen and fresh water from seawater Read 2026-09-29 Relevance DIRECT Steps 0 Counted

Primary journal abstract; this is an independent evidence lineage for the quantitative system-performance claim.

Evidence against

None.

Qualifications

None.

Suppressed as dependent

Evidence	Group	Kept instead
3f9f51a6		f52288a2

Inferences

Concluded from

None.

Used as a premise in

None.

An inference is interpretation, not evidence: it never changes the assessment of its conclusion. Each premise is a claim with its own evidence.

Threads

None. Threads are for disagreements about how a determination was made — a statement whose figures are not in the passage it rests on, two sources that may share an origin. Something about the world belongs in the evidence above.

Claim edges

None. Edges are stored and displayed; v0.1 does not propagate probability across them.

Review checklist

Review checks: 1 of 4

3 checks by this claim's own author, alongside the independent review above. 1 OPPOSING EVIDENCE SEARCH · 1 QUALIFIER CHECK · 1 EVIDENCE VERIFICATION. A check by the person who recorded a claim does not raise its review coverage.

Check	Done	By
qualifiers reviewed	no
opposing search done	no
independence reviewed	no
primary source reviewed	yes	d741d04b, 76cb0675, f52288a2

Summary

Supported. The main support is: The Nature Energy report directly documents the 20-kW pilot's 100-day operation and the 250-kW scale-up outputs and relative efficiency improvement described in the claim. 481722b8

1 further item repeats the same origin and is not independent evidence. 3f9f51a6

A search for evidence in the opposing direction found none. e785bef2

Review checks: 1 of 4. coverage:29526bc5-3f22-89b3-ab1a-2ab1739dba48

Generated by stub-v0.1; every sentence cites graph ids.

Contribution history

seq	event	detail
16032	APPENDED
16033	ACCEPT	AUTOMATIC_AFTER_VALIDATION
16044	LINK_EVIDENCE	by 1efd24fe (accepted)
16050	TASK_RESULT	by 1efd24fe (accepted)
16631	LINK_EVIDENCE	by 1efd24fe (accepted)