Added pipe standard type 'heating pipe'

pandapipes/create.py

@@ -19,6 +19,7 @@
 from pandapipes.std_types.std_type_class import regression_function, PumpStdType
 from pandapipes.std_types.std_types import add_basic_std_types, create_pump_std_type, \
     load_std_type
+#from pandapipes.toolbox import calculate_alpha
 
 try:
     import pandaplan.core.pplog as logging
@@ -429,13 +430,23 @@
         >>>             std_type='315_PE_80_SDR_17', length_km=1)
 
     """
+    from pandapipes.toolbox import calculate_alpha
     add_new_component(net, Pipe)
 
     index = _get_index_with_check(net, "pipe", index)
     _check_branch(net, "Pipe", index, from_junction, to_junction)
     _check_std_type(net, std_type, "pipe", "create_pipe")
 
     pipe_parameter = load_std_type(net, std_type, "pipe")
+
+    if pd.notna(pipe_parameter['u_w/mk']) and alpha_w_per_m2k == 0.0:
+        pipe_parameter['u_w/mk'] = float(pipe_parameter['u_w/mk'])
+        alpha_w_per_m2k = calculate_alpha(pipe_parameter['inner_diameter_mm'], pipe_parameter['u_w/mk'])
+    elif pd.notna(pipe_parameter['u_w/mk']) and alpha_w_per_m2k != 0.0:
+        alpha_w_per_m2k = alpha_w_per_m2k
+        logger.warning('you have defined alpha which overwrites the heat_transfer coefficient of the pipe standard type')
+    else:
+        alpha_w_per_m2k = alpha_w_per_m2k
     v = {"name": name, "from_junction": from_junction, "to_junction": to_junction,
          "std_type": std_type, "length_km": length_km,
          "diameter_m": pipe_parameter["inner_diameter_mm"] / 1000, "k_mm": k_mm,