.TransiEnt.Components.Heat.VolumesValvesFittings.Pipes.Base.dp_residencetime

Information

1. Purpose of model

Calculates pressure drop and thermal delay of temperature changes with respect to flow velocity and pipe length

2. Level of detail, physical effects considered, and physical insight

(no remarks)

3. Limits of validity

(no remarks)

4. Interfaces

(no remarks)

5. Nomenclature

(no remarks)

6. Governing Equations

See Reference

7. Remarks for Usage

Pressure loss is linearized for mass flow rates below 5% of the nominal velocity.

Residence time is limited to 10h to improve initialisation with no mass flow present in the system at time = 0.

8. Validation

(no remarks)

9. References

B. van der Heijde, M. Fuchs, C. Ribas Tugores "Dynamic equation-based thermo-hydraulic pipe model for district heating and cooling systems", 2017

10. Version History

Model created by Philipp Huismann (huismann@gwi-essen.de) on 10.10.2018

Model revised by Philipp Huismann (huismann@gwi-essen.de) on 07.04.2022 | Pressure Loss linearisation for small mass flow rates, Residence Time limitation