{
  "name": "Chiller Air-Glycol - Screw MCHX Run (Compatible)",
  "description": "Simulation chiller 2 circuits avec ScrewEconomizerCompressor et MchxCondenserCoil. Les composants utilisent les n_equations compatibles avec le graphe (2 par arête).",

  "fluid": "R134a",

  "circuits": [
    {
      "id": 0,
      "components": [
        {
          "type": "ScrewEconomizerCompressor",
          "name": "screw_0",
          "fluid": "R134a",
          "nominal_frequency_hz": 50.0,
          "mechanical_efficiency": 0.92,
          "economizer_fraction": 0.12,
          "mf_a00": 1.20,
          "mf_a10": 0.003,
          "mf_a01": -0.002,
          "mf_a11": 0.00001,
          "pw_b00": 55000.0,
          "pw_b10": 200.0,
          "pw_b01": -300.0,
          "pw_b11": 0.5,
          "p_suction_bar": 3.2,
          "h_suction_kj_kg": 400.0,
          "p_discharge_bar": 12.8,
          "h_discharge_kj_kg": 440.0,
          "p_eco_bar": 6.4,
          "h_eco_kj_kg": 260.0
        },
        {
          "type": "MchxCondenserCoil",
          "name": "mchx_0a",
          "ua": 15000.0,
          "coil_index": 0,
          "n_air": 0.5,
          "t_air_celsius": 35.0,
          "fan_speed_ratio": 1.0
        },
        {
          "type": "MchxCondenserCoil",
          "name": "mchx_0b",
          "ua": 15000.0,
          "coil_index": 1,
          "n_air": 0.5,
          "t_air_celsius": 35.0,
          "fan_speed_ratio": 1.0
        },
        {
          "type": "Placeholder",
          "name": "exv_0",
          "n_equations": 2
        },
        {
          "type": "FloodedEvaporator",
          "name": "evap_0",
          "ua": 20000.0,
          "refrigerant": "R134a",
          "secondary_fluid": "MEG",
          "target_quality": 0.7
        }
      ],
      "edges": [
        { "from": "screw_0:outlet",  "to": "mchx_0a:inlet" },
        { "from": "mchx_0a:outlet",  "to": "mchx_0b:inlet" },
        { "from": "mchx_0b:outlet",  "to": "exv_0:inlet" },
        { "from": "exv_0:outlet",    "to": "evap_0:inlet" },
        { "from": "evap_0:outlet",   "to": "screw_0:inlet" }
      ]
    },
    {
      "id": 1,
      "components": [
        {
          "type": "ScrewEconomizerCompressor",
          "name": "screw_1",
          "fluid": "R134a",
          "nominal_frequency_hz": 50.0,
          "mechanical_efficiency": 0.92,
          "economizer_fraction": 0.12,
          "mf_a00": 1.20,
          "mf_a10": 0.003,
          "mf_a01": -0.002,
          "mf_a11": 0.00001,
          "pw_b00": 55000.0,
          "pw_b10": 200.0,
          "pw_b01": -300.0,
          "pw_b11": 0.5,
          "p_suction_bar": 3.2,
          "h_suction_kj_kg": 400.0,
          "p_discharge_bar": 12.8,
          "h_discharge_kj_kg": 440.0,
          "p_eco_bar": 6.4,
          "h_eco_kj_kg": 260.0
        },
        {
          "type": "MchxCondenserCoil",
          "name": "mchx_1a",
          "ua": 15000.0,
          "coil_index": 2,
          "n_air": 0.5,
          "t_air_celsius": 35.0,
          "fan_speed_ratio": 1.0
        },
        {
          "type": "MchxCondenserCoil",
          "name": "mchx_1b",
          "ua": 15000.0,
          "coil_index": 3,
          "n_air": 0.5,
          "t_air_celsius": 35.0,
          "fan_speed_ratio": 1.0
        },
        {
          "type": "Placeholder",
          "name": "exv_1",
          "n_equations": 2
        },
        {
          "type": "FloodedEvaporator",
          "name": "evap_1",
          "ua": 20000.0,
          "refrigerant": "R134a",
          "secondary_fluid": "MEG",
          "target_quality": 0.7
        }
      ],
      "edges": [
        { "from": "screw_1:outlet",  "to": "mchx_1a:inlet" },
        { "from": "mchx_1a:outlet",  "to": "mchx_1b:inlet" },
        { "from": "mchx_1b:outlet",  "to": "exv_1:inlet" },
        { "from": "exv_1:outlet",    "to": "evap_1:inlet" },
        { "from": "evap_1:outlet",   "to": "screw_1:inlet" }
      ]
    }
  ],

  "solver": {
    "strategy": "fallback",
    "max_iterations": 200,
    "tolerance": 1e-4,
    "timeout_ms": 10000,
    "verbose": false
  },

  "metadata": {
    "refrigerant": "R134a",
    "application": "Air-cooled chiller, screw with economizer",
    "glycol_type": "MEG 35%",
    "glycol_inlet_celsius": 12.0,
    "glycol_outlet_celsius": 7.0,
    "ambient_air_celsius": 35.0,
    "n_coils": 4,
    "n_circuits": 2,
    "design_capacity_kw": 400
  }
}