modelDynamicHeatFlow_simple

Information

1. Purpose of model

Simple model for the thermal behaviour of an engine.

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

This model is based on the staticHeatFlow model. Two thermal capacitors are added, representing the thermal inertia of the engine itself and its cooling system.

3. Limits of validity

(Purely technical component without physical modeling.)

4. Interfaces

switch - boolean input to switch the engine on/off

P_el - target electrical power input

efficienciesIn[2] - Input connector for electrical [1] and overall [2] efficiency of the engine

temperaturesOut[2] - Output connector for temperature levels in the engine (as the efficiencies in the more complex models are calculated based on temperature-dependent empirical equations)

waterIn/waterOut - fluidports for return / supplystream of the heating system

5. Nomenclature

(no elements)

6. Governing Equations

This model is based on energy conservation equations, just as the static model. The following flowchart illustrates hte energy flow and its equations

7. Remarks for Usage

This model is meant to be used in combination with at least one engineMechanics-model from the engines.basics package.

8. Validation

This model has been parametrised and validated as part of the overall CHP-model (DACHS HKA G5.5).

9. References

(no remarks)

10. Version History

Created by Arne Koeppen (arne.koeppen@tuhh.de), Apr 2014

Edited by Jan Braune (jan.braune@tuhh.de), Mar 2015

Revised by Lisa Andresen (andresen@tuhh.de), Aug 2015

Parameters

Connectors

Components