Modifications for GHE

geojson_modelica_translator/system_parameters/schema.json

@@ -157,12 +157,78 @@
           "items": {
             "$ref": "#/definitions/battery_bank_parameters"
           }
+        },
+        "soil": {
+          "description": "Soil properties for Ground Heat Exchanger sizing",
+          "type": "object",
+          "properties": {
+            "conductivity": {
+              "description": "The conductivity of the soil, in units of W/m-K.",
+              "type": "number"
+            },
+            "rho_cp": {
+              "description": "The volumetric heat capacity of the soil, in units of J/m^3-K",
+              "type": "number"
+            },
+            "undisturbed_temp": {
+              "description": "The undisturbed average soil temperature, in units of degrees Celsius.",
+              "type": "number"
+            }
+          }
+        },
+        "pipe": {
+          "description": "Pipe properties for Ground Heat Exchanger sizing",
+          "type": "object",
+          "properties": {
+            "inner_radius": {
+              "description": "The radius of the inner pipe surface, in meters.",
+              "type": "number"
+            },
+            "outer_radius": {
+              "description": "The radius of the outer pipe surface, in meters.",
+              "type": "number"
+            },
+            "shank_spacing": {
+              "description": "The spacing between the U-tube legs, as referenced from outer surface of the pipes (i.e. not referenced from each pipes respective centerline), in meters.",
+              "type": "number"
+            },
+            "roughness": {
+              "description": "The surface roughness of the pipe, in meters.",
+              "type": "number"
+            },
+            "conductivity": {
+              "description": "The conductivity of the pipe material, in W/m-K.",
+              "type": "number"
+            },
+            "rho_cp": {
+              "description": "The volumetric heat capacity of the pipe material, in J/m^3-K",
+              "type": "number"
+            }
+          }
+        },
+        "borehole": {
+          "description": "Pipe properties for Ground Heat Exchanger sizing",
+          "type": "object",
+          "properties": {
+            "length": {
+              "description": "The length of the borehole, in meters.",
+              "type": "number"
+            },
+            "buried_depth": {
+              "description": "The depth below the ground surface to the top of the borehole, in meters.",
+              "type": "number"
+            },
+            "radius": {
+              "description": "The radius of the borehole, in meters",
+              "type": "number"
+            }
+          }
         }
       },
-      "additionalProperties": false,
       "required": [
         "weather"
-      ]
+      ],
+      "additionalProperties": false
     },
     "topology_def": {
       "title": "defaults",

tests/system_parameters/data/system_params_ghe.json

@@ -0,0 +1,136 @@
+{
+  "weather": "../../data_shared/USA_CA_San.Francisco.Intl.AP.724940_TMY3.mos",
+  "buildings": [
+    {
+      "geojson_id": "abcd1234",
+      "ets_model": "Indirect Heating and Cooling",
+      "ets_indirect_parameters": {
+        "heat_flow_nominal": 8000,
+        "heat_exchanger_efficiency": 0.8,
+        "nominal_mass_flow_district": 0.5,
+        "nominal_mass_flow_building": 0.5,
+        "valve_pressure_drop": 6000,
+        "heat_exchanger_secondary_pressure_drop": 500,
+        "heat_exchanger_primary_pressure_drop": 500,
+        "cooling_supply_water_temperature_building": 7,
+        "heating_supply_water_temperature_building": 50,
+        "delta_temp_chw_building": 5,
+        "delta_temp_chw_district": 8,
+        "delta_temp_hw_building": 15,
+        "delta_temp_hw_district": 20,
+        "cooling_controller_y_max": 1,
+        "cooling_controller_y_min": 0,
+        "heating_controller_y_max": 1,
+        "heating_controller_y_min": 0
+      }
+    },
+    {
+      "geojson_id": "defgh2345",
+      "load_model": "spawn",
+      "load_model_parameters": {
+        "spawn": {
+          "idf_filename": "path to a file",
+          "has_liquid_heating": true,
+          "has_electric_heating": false,
+          "has_liquid_cooling": true,
+          "has_electric_cooling": false,
+          "temp_chw_supply": 7,
+          "temp_chw_return": 12,
+          "temp_hw_supply": 40,
+          "temp_hw_return": 35,
+          "temp_setpoint_cooling": 20,
+          "temp_setpoint_heating": 24,
+          "thermal_zone_names": [
+            "zone a",
+            "zone_b"
+          ],
+          "zone_nom_htg_loads": [
+            3000,
+            3000
+          ],
+          "zone_nom_clg_loads": [
+            -8750,
+            -8750
+          ]
+        }
+      },
+      "ets_model": "Indirect Heating and Cooling",
+      "ets_indirect_parameters": {
+        "heat_flow_nominal": 8000,
+        "heat_exchanger_efficiency": 0.8,
+        "nominal_mass_flow_district": 0.5,
+        "nominal_mass_flow_building": 0.5,
+        "valve_pressure_drop": 6000,
+        "heat_exchanger_secondary_pressure_drop": 500,
+        "heat_exchanger_primary_pressure_drop": 500,
+        "cooling_supply_water_temperature_building": 7,
+        "heating_supply_water_temperature_building": 50,
+        "delta_temp_chw_building": 5,
+        "delta_temp_chw_district": 8,
+        "delta_temp_hw_building": 15,
+        "delta_temp_hw_district": 20,
+        "cooling_controller_y_max": 1,
+        "cooling_controller_y_min": 0,
+        "heating_controller_y_max": 1,
+        "heating_controller_y_min": 0
+      }
+    }
+  ],
+  "district_system": {
+    "fourth_generation": {
+      "central_cooling_plant_parameters": {
+        "heat_flow_nominal": 7999,
+        "cooling_tower_fan_power_nominal": 4999,
+        "mass_chw_flow_nominal": 9.9,
+        "chiller_water_flow_minimum": 9.9,
+        "mass_cw_flow_nominal": 9.9,
+        "chw_pump_head": 300000,
+        "cw_pump_head": 200000,
+        "pressure_drop_chw_nominal": 5999,
+        "pressure_drop_cw_nominal": 5999,
+        "pressure_drop_setpoint": 49999,
+        "temp_setpoint_chw": 6,
+        "pressure_drop_chw_valve_nominal": 5999,
+        "pressure_drop_cw_pum_nominal": 5999,
+        "temp_air_wb_nominal": 24.9,
+        "temp_cw_in_nominal": 34.9,
+        "cooling_tower_water_temperature_difference_nominal": 6.56,
+        "delta_temp_approach": 3.25,
+        "ratio_water_air_nominal": 0.6
+      },
+      "central_heating_plant_parameters": {
+        "heat_flow_nominal": 8001,
+        "mass_hhw_flow_nominal": 11,
+        "boiler_water_flow_minimum": 11,
+        "pressure_drop_hhw_nominal": 55001,
+        "pressure_drop_setpoint": 50000,
+        "temp_setpoint_hhw": 54,
+        "pressure_drop_hhw_valve_nominal": 6001,
+        "chp_installed": false
+      }
+    }
+  },
+  "connectors": {
+    "pipe_diameter": 12,
+    "pipe_insulation_rvalue": 5,
+    "pipe_location": "Tunnel"
+  },
+  "soil": {
+    "conductivity": 2.0,
+    "rho_cp": 2343493,
+    "undisturbed_temp": 18.3
+  },
+  "pipe": {
+    "inner_radius": 0.0108,
+    "outer_radius": 0.0133,
+    "shank_spacing": 0.0323,
+    "roughness": 0.000001,
+    "conductivity": 0.4,
+    "rho_cp": 1542000
+  },
+  "borehole": {
+    "length": 96.0,
+    "buried_depth": 2.0,
+    "radius": 0.075
+  }
+}

tests/system_parameters/test_system_parameters.py

@@ -60,6 +60,12 @@ def test_load_system_parameters_2(self):
         sdp = SystemParameters(filename)
         self.assertIsNotNone(sdp)
 
+    def test_load_system_parameters_ghe(self):
+        filename = self.data_dir / 'system_params_ghe.json'
+        sdp = SystemParameters(filename)
+        self.assertIsNotNone(sdp)
+        self.assertEqual([], sdp.validate())
+
     def test_missing_file(self):
         fn = "non-existent-path"
         with self.assertRaises(Exception) as exc:
@@ -93,6 +99,7 @@ def test_errors(self):
         self.assertIn("'temp_setpoint_heating' is a required property", sp.validate())
         self.assertIn("5 is not one of [1, 2, 3, 4]", sp.validate())
 
+
     def test_get_param(self):
         data = {
             "weather": "path/to/weatherfile.mos",