modelHEXOneRealGasOuterTIdeal_L1

Information

1. Purpose of model

This is a simple model of a heat exchanger with one real gas and a heat port. The outlet temperature is given by a parameter or by an input. The calculated heat flow to reach that temperature can be limited by choosing heating or cooling only behavior.

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

The detailed heat transfer is not modeled, only an end temperature for the medium is given by a parameter (at outlet of the medium). There are no heat losses and no changes in composition of the medium. A constant limit for the transferable heat flow rate can be set and, if desired, heat transfer can be limited to only heating or only cooling. The model only works in the design flow direction.

3. Limits of validity

This model is only valid for real gases and if the heat transfer is close to ideal conditions. Also, it has to be checked that the temperatures at the inlet and outlet are physically plausible (see 7.).

4. Interfaces

gasPortIn: Inlet of the medium

gasPortOut: Outlet of the medium

heat: Heat port

5. Nomenclature

: Heat flow transfered from the medium to the heat port

6. Governing Equations

Energy balance:

7. Remarks for Usage

The plausability of the temperatures at inlet and outlet of the gas and the temperature of the heat port has to be checked. They have to fit to the chosen type of heat exchanger (e.g. concurrent or countercurrent).

8. Validation

(no remarks)

9. References

(no remarks)

10. Version History

Model created by Carsten Bode (c.bode@tuhh.de) on Tue Apr 05 2016

Model modified by Carsten Bode (c.bode@tuhh.de) in Sep 2019 (included variable outlet temperature and limited cooling or heating behavior)

Model modified by Carsten Bode (c.bode@tuhh.de) in Mar 2020 (added maximum heat flow rate)

Parameters

Connectors

Components

Contents

Name	Description
Summaryprotected