Made heat pump a parent class for air source and water to water sources heat pumps

city_model_structure/energy_systems/heat_pump.py

@@ -0,0 +1,31 @@
+"""
+heat_pump module defines a heat pump
+SPDX - License - Identifier: LGPL - 3.0 - or -later
+Copyright © 2021 Project Author Peter Yefi peteryefi@gmail.com
+"""
+
+
+class HeatPump:
+  """
+  HeatPump class
+  """
+
+  def __init__(self):
+    self._model = None
+
+  @property
+  def model(self) -> str:
+    """
+    Get model name
+    :return: str
+    """
+    return self._model
+
+  @model.setter
+  def model(self, value):
+    """
+    Set model (name, indicated in capacity)
+    :param value: str
+    """
+    if self._model is None:
+      self._model = value