{
  "id": "flow_efficiency",
  "title": "液流电池效率关系",
  "domain": "storage",
  "type": "demo",
  "data_status": "synthetic_demo",
  "not_experimental_data": true,
  "random_seed": 20260936,
  "source_files": [
    "data.csv",
    "cycle_profiles.csv"
  ],
  "variables_and_units": [
    "cycle",
    "ce_percent",
    "ve_percent",
    "ee_percent",
    "q_charge_mAh",
    "q_discharge_mAh",
    "capacity_weighted_charge_V",
    "capacity_weighted_discharge_V",
    "charge_energy_mWh",
    "discharge_energy_mWh"
  ],
  "test_conditions": "Original unnamed flow-cell ledger; Q and integral(V dQ) are supplied for each branch; voltage means are capacity-weighted; excludes pump/auxiliary energy and all system-level claims",
  "render_options": {
    "recipe": "flow_efficiency"
  },
  "reproduce": "python render_existing.py --output new-result",
  "creator": "VoltPeer maintainers",
  "license": "MIT",
  "generator_version": "1.6",
  "limitations": "Declared teaching model only; no measured device, mechanism or material certification. This generator does not adapt experimental data.",
  "scientific_basis": {
    "schema_version": 1,
    "model_class": "analytic_model",
    "data_origin": "original_synthetic",
    "equations": [
      "CE=Q_discharge/Q_charge; Vmean_branch=integral(V dQ)/Q_branch",
      "VE=Vmean_discharge/Vmean_charge; EE=E_discharge/E_charge=CE*VE",
      "Q_charge=100-0.01*cycle mAh; CE=0.982-0.00002*cycle; VE=0.84-0.0003*cycle",
      "V_charge_mean=1.42+0.00012*cycle; V_discharge_mean=VE*V_charge_mean",
      "Branch V(Q)=Vmean+tilt*(2*Q/Qtotal-1), tilt_charge=0.08 V, tilt_discharge=-0.06 V"
    ],
    "assumptions": [
      "Positive capacity and energy in both branches over identical declared cycle boundaries.",
      "Cell DC energy only; linear V(Q) permits an exact trapezoidal integral."
    ],
    "parameters": {
      "cycles": 150,
      "initial_charge_mAh": 100,
      "charge_capacity_drift_mAh_cycle": 0.01,
      "nominal_charge_mean_V": 1.42,
      "voltage_grid_points_per_branch": 51,
      "auxiliary_pump_energy_included": false,
      "voltage_average": "capacity-weighted"
    },
    "references": [
      {
        "url": "https://www.nature.com/articles/s41560-020-00772-8",
        "title": "Assessment methods and performance metrics for redox flow batteries",
        "supports": "CE/VE/EE reporting boundaries; the charge-voltage-energy ledger is original.",
        "scope": "model_definition_only"
      }
    ],
    "limitations": [
      "All numeric material/rate parameters are original teaching assumptions, not measured or copied paper data.",
      "No pump/inverter/thermal loss or named electrolyte chemistry; no system round-trip efficiency claim."
    ],
    "validation_scope": "Original teaching-model equations, charge/energy/units and declared boundaries only; no experimental or material certification."
  },
  "actual_artist_checks": [
    {
      "panel": 0,
      "frame_spines": {
        "top": true,
        "right": true,
        "bottom": true,
        "left": true
      },
      "curve_styles": [
        {
          "linestyle": "None",
          "marker": "o",
          "points": 150,
          "sampling": "cycle_scatter"
        },
        {
          "linestyle": "None",
          "marker": "o",
          "points": 150,
          "sampling": "cycle_scatter"
        },
        {
          "linestyle": "None",
          "marker": "o",
          "points": 150,
          "sampling": "cycle_scatter"
        }
      ],
      "xlabel": "Cycle",
      "ylabel": "Efficiency (%)"
    },
    {
      "panel": 1,
      "frame_spines": {
        "top": true,
        "right": true,
        "bottom": true,
        "left": true
      },
      "curve_styles": [
        {
          "linestyle": "None",
          "marker": "o",
          "points": 150,
          "sampling": "cycle_scatter"
        },
        {
          "linestyle": "None",
          "marker": "o",
          "points": 150,
          "sampling": "cycle_scatter"
        }
      ],
      "xlabel": "Cycle",
      "ylabel": "Capacity (mAh)"
    },
    {
      "panel": 2,
      "frame_spines": {
        "top": true,
        "right": true,
        "bottom": true,
        "left": true
      },
      "curve_styles": [
        {
          "linestyle": "None",
          "marker": "o",
          "points": 150,
          "sampling": "cycle_scatter"
        }
      ],
      "xlabel": "Cycle",
      "ylabel": "Model capacity retention (%)"
    }
  ],
  "curve_style_check": "Cycle quantities marker-only; continuous profiles solid/unmarked; user preference.",
  "retention_reference": {
    "reference_cycle": 1,
    "reference_capacity": 98.18818019999999,
    "formula": "100*Qdis(n)/Qdis(explicit cycle 1)",
    "conditions": "same original teaching model; physical current/rate not simulated or supplied; no acquired cell normalization"
  },
  "current_bundle_entry": "render_existing.py; supplied CSV only; draw() called, never data() or main()"
}