.Buildings.Fluid.FixedResistances.Validation.PlugFlowPipes.Data.PipeDataAIT151218

Information

Overview

This record contains data of a real disitrict heating network for week-long period (23-29 Januar 2009) monitored by the Austrian Institut for Technology.

Pipes are layed underground

Data structure

Column 1: Time in s

Column 2: Temperature in point 1 in K

Column 3: Temperature in point 2 in K

Column 4: Temperature in point 3 in K

Column 5: Temperature in point 4 in K

Column 6: Mass flow rate in point 1 in kg/s

Column 7: Mass flow rate in point 2 in kg/s

Column 8: Mass flow rate in point 3 in kg/s

Column 9: Mass flow rate in point 4 in kg/s

Column 10: Outdoor temperature in K

Test procedure

Test bench schematic

Notice that length are approximated

Pipe characteristics

• Inner diameter: 0.0825 m (DN080)
• Outer diameter: 0.0889 m (stell wall thickness 3.2 mm)
• Casing diameter: 0.18 m
• Insulation material: Polyurethane
• Heat conductivity of insulation material: 0.024 W/(m K) (average value at 50 °C)
• Length specific pipe's heat loss coefficient: 0.208 W/(m K)
• Wall roughness coefficient: 0.1 mm

Revisions

• March 7, 2020, by Michael Wetter:
  Replaced measured data from specification in Modelica file to external table, as this reduces the computing time.
  This is for #1289.
• December 18, 2015 by Daniele Basciotti:
  First implementation.