{
  "name": "Prairie Town",
  "note": "Prairie Town is fictional. Its plants, sizes and prices are illustrative. Hourly demand, wind and solar follow the shapes of real days on the Southwest Power Pool grid (town_year.json and town_days.json, from EIA-930), scaled down to the town.",
  "units": {
    "mw": "MW (plant size, or average output over an hour)",
    "cost": "$ per MWh (running cost: fuel and other costs that grow with output)",
    "co2": "t CO2 per MWh (t = metric tonne, 1,000 kg); illustrative operating emissions only: fuel burned at the plant. Construction, fuel supply and upstream methane are outside the boundary",
    "ramp": "MW per hour"
  },
  "fleet": {
    "nuclear": { "label": "Nuclear plant", "mw": 100, "cost": 10, "co2": 0, "behaviour": "runs flat" },
    "wind": { "label": "Wind farm", "mw": 150, "cost": 0, "co2": 0, "behaviour": "follows the wind" },
    "solar": { "label": "Solar farm", "mw": 200, "cost": 0, "co2": 0, "behaviour": "follows the sun" },
    "cc": { "label": "Gas combined-cycle plant", "mw": 150, "cost": 40, "co2": 0.37, "ramp": 40, "behaviour": "adjustable, slow to change" },
    "peaker": { "label": "Gas peaker", "mw": 100, "cost": 100, "co2": 0.55, "behaviour": "adjustable, fast" }
  },
  "scenarios": {
    "lesson0": {
      "about": "Lesson 0: one real late-summer day, scaled. The day is read from town_year.json by local date (Central daylight time, UTC-5; index i is the hour ending at start_utc + i). Demand = shape x demandPeakMW; wind and solar = shape x farm size (SPP's highest hour of 2025 = the farm at full output), rounded to whole MW; demand then rounded by at most 2.5 MW so that the gas needed each hour is a multiple of `step` (a careful player can balance exactly). Chosen on 2026-11-02 from June-September 2025 for a real midday solar dip (14:00-15:00, SPP solar 737 -> 553 -> 730 MW) and an evening climb faster than the combined-cycle plant's ramp limit.",
      "date": "2025-09-03",
      "dateLabel": "3 September 2025",
      "utcOffsetHours": -5,
      "demandPeakMW": 450,
      "step": 5,
      "startCC": 115,
      "startPeaker": 0,
      "hzPerMW": 0.01,
      "hzLimit": 0.5,
      "cloudDip": 0.12
    }
  }
}