{
  "fluid": "R134a",
  "fluid_backend": "CoolProp",
  "circuits": [{
    "id": 0,
    "components": [
      { "type": "IsentropicCompressor", "name": "comp", "isentropic_efficiency": 0.70, "t_cond_k": 318.15, "t_evap_k": 278.15, "superheat_k": 5.0, "emergent_pressure": true, "displacement_m3": 6.5e-5, "speed_hz": 50.0, "volumetric_efficiency": 0.92 },
      { "type": "Condenser", "name": "cond", "ua": 766.0, "emergent_pressure": true, "subcooling_k": 5.0, "secondary_fluid": "Water" },
      { "type": "IsenthalpicExpansionValve", "name": "exv", "t_evap_k": 278.15, "emergent_pressure": true, "orifice_kv": 2.0e-6, "orifice_opening_init": 0.5, "orifice_opening_min": 0.02, "orifice_opening_max": 1.0 },
      { "type": "Evaporator", "name": "evap", "ua": 1468.0, "emergent_pressure": true, "superheat_regulated": true, "secondary_fluid": "Water" },
      { "type": "BrineSource", "name": "cond_water_in", "fluid": "Water", "p_set_bar": 2.0, "t_set_c": 30.0, "m_flow_kg_s": 0.3583 },
      { "type": "BrineSink", "name": "cond_water_out", "fluid": "Water", "p_back_bar": 2.0 },
      { "type": "BrineSource", "name": "evap_water_in", "fluid": "Water", "p_set_bar": 2.0, "t_set_c": 12.0, "m_flow_kg_s": 0.4778 },
      { "type": "BrineSink", "name": "evap_water_out", "fluid": "Water", "p_back_bar": 2.0 }
    ],
    "edges": [
      { "from": "comp:outlet", "to": "cond:inlet" },
      { "from": "cond:outlet", "to": "exv:inlet" },
      { "from": "exv:outlet", "to": "evap:inlet" },
      { "from": "evap:outlet", "to": "comp:inlet" },
      { "from": "cond_water_in:outlet", "to": "cond:secondary_inlet" },
      { "from": "cond:secondary_outlet", "to": "cond_water_out:inlet" },
      { "from": "evap_water_in:outlet", "to": "evap:secondary_inlet" },
      { "from": "evap:secondary_outlet", "to": "evap_water_out:inlet" }
    ]
  }],
  "controls": [
    {
      "type": "SaturatedController", "id": "sh_control",
      "measure": { "component": "evap", "output": "superheat" },
      "actuator": { "component": "exv", "factor": "opening", "initial": 0.5, "min": 0.02, "max": 1.0 },
      "target": 5.0, "gain": -0.8, "band": 1.0, "alpha": 5e-2
    }
  ],
  "solver": { "strategy": "newton", "max_iterations": 300, "tolerance": 1e-6 }
}