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"thermal_inventory_gate": true, "nodes": [ { "name": "Cold compressor inlet", "pressure_Pa": 55000.0, "enthalpy_J_kg": 134189.7025297163, "temperature_K": 129.99999993772593 }, { "name": "Compressor outlet", "pressure_Pa": 112000.0, "enthalpy_J_kg": 169811.0571097193, "temperature_K": 164.47879560883104 }, { "name": "Warm turbine inlet", "pressure_Pa": 110000.0, "enthalpy_J_kg": 300759.4078769638, "temperature_K": 290.0 }, { "name": "Turbine outlet", "pressure_Pa": 57000.0, "enthalpy_J_kg": 256928.14142740075, "temperature_K": 247.75599107733282 } ] } ], "inputs": { "prepared_coolant_N2_kg": 6.0, "finite_heat_source_air_kg": 30.0, "generator_efficiency_target": 0.9, "motor_efficiency_target": 0.9, "air_blower_efficiency_target": 0.65, "startup_inventory_and_wet_mass_closed": false, "full_6kg_liquid_preparation_reversible_floor_J": 4450117.254184179 }, "limits": [ "A closed pure-nitrogen loop uses cold compression and warm expansion. This is conventional thermal work, not energy from an empty region.", "Each heat exchanger has an explicit 2 kPa nitrogen pressure-loss target. Installed machine efficiencies, pressure loss and UA are unmeasured.", "The same-shaft target uses 96% transmission efficiency; surplus shaft work alone enters the generator. Shaft-speed matching, mechanical losses and startup motor demand still need hardware evidence.", "The bath is an already prepared liquid-nitrogen resource. Boiled cold vapour and unspent liquid remain in the availability ledger.", "Startup, working-gas inventory, wall transients, vessel mass, hot/cold seals, compressor maps, controls and real pressure dynamics are not solved.", "No electrical energy or vehicle-performance credit is assigned to the driving model." ] }