modelHEX_ideal

Information

Purpose of model

An ideal heat exchanger with two fluid ports and a heat port. The fluid ports can be connected with a hydraulic circuit to simulate a heat carrier medium. The transferred heat is transported through the heat port. For the correct use of the model, the heat port needs to be connected with another heat port that sets a heat flow rate. A static mass balance is assumed. A static energy balance is assumed, taking the enthalpy flows of the heat carrier medium and the transported heat flow rate into account. The temperatures at the inlet and the outlet of the heat exchanger are calculated with fluid models of the TIL media that need the specific enthalpy and the pressure. A constant pressure loss is assumed in the model.

Level of detail, physical effects considered, and physical insight

A given heat Q_flow,in is ideally transferred to a medium (water) flow.

Limits of validity

Only applicable for heat transfer from heatport to medium.

Interfaces

waterPortIn/Out - ports for heat carrier (water)

heatport - heat inpout port

Governing Equations

The heat is balanced by a static equation:

Q_flow,in + m_flow(h_water,in - h_water,out) = 0

delta_p is a constant parameter

Remarks for Usage

Validation

Tested and verified in check model "TestHEX_ideal"

Version History

Created by Paul Kernstock (paul.kernstock@tuhh.de), Jun 2015

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

Model documented by Jan Westphal (j.westphal@tuhh.de) in January 2025

Parameters

Connectors

Components