Temperature gradient → Mechanical work

Matrix context

D = disequilibrium row · C = coupling family column. A cell reads the state of the atlas for that pair.

D.01 × C.08 · Temperature gradient × Heat engine (thermomechanical)family: Heat engine (thermomechanical)

Typed bounds on this route

Every limit the atlas holds for this route, as constraint records: reached through bounded_by claims on the route's own entities. Hard bounds (an upper bound or a formula) decide the thermodynamic-bound check above; benchmarks, constitutive relations and resource limits are listed and never decisive. No prose limit exists anywhere (pass 42).

• Carnot limit · formula-bound · hard, applies to this route
  η ≤ 1 − T_c/T_h for any heat engine between reservoirs at T_h and T_c

Steps

1. 01
   Temperature gradient —drives→ Ocean thermal energy conversiondemonstratedclaim record

   thermal → mechanical · loss to thermal

   • a ≈ 20 K difference between warm surface water and cold water from ~1000 m depth

   liquid · temperature gradient required

   refs [1] [2]
2. 02
   Ocean thermal energy conversion —produces→ Mechanical motiondemonstratedclaim record

   mechanical → mechanical

   refs [1]
3. 03
   Mechanical motion —converts into→ Mechanical workestablishedclaim record

   mechanical → mechanical · loss to thermal

   refs [2]

Evidence for the complete composition · 0

No source on record for this exact composition. The sources below support the individual steps, not the route as a whole.

Evidence for the constituent relations · 2

1. [1]
   G. Claude. Power from the tropical seas (1930)

   Mechanical Engineering 52, 1039–1044 · paper, no DOI · record
2. [2]
   A. Bejan. Advanced Engineering Thermodynamics (4th ed.) (2016)

   Wiley · doi:10.1002/9781119245964 · crossref ✓ 2026-09-19 · record