.ThermoPower.Examples.HRB.Models.HeatExchanger

Information

• The boiler contains Nr rows of tubes, connected in series; each one is made of Nt identical tubes in parallel.
• Each tube has a length L, internal and external diameters Dint and Dext, and is made of a metal having density rhom and a specific heat capacity of cm.
• The series connection of the tubes is discretised with Nr+1 nodes, so that each cell between two nodes corresponds to a single row.
• The gas flow is also discretised with Nr+1 nodes, so that each gas cell interacts with a single tube row.
• The gas flows through a volume having a (net) cross-section Sb and a (net) length Lb.
• Mass and energy dynamic balances are assumed for the water side.
• The mass and energy balances for the gas side are either static or dynamic, depending on the value of the StaticGasBalances parameter.
• The fluid in the water side remains liquid throughout the boiler.
• The heat transfer coefficient on the water side is computed by Dittus-Boelter's correlation.
• The external heat transfer coefficient is computed according to the simple law declared Flow1DGasHT. To change that correlation, it is only necessary to change equations in that model.

Contents

Name	Description
GasMedium
WaterMedium

Revisions

• 12 Dec 2008 by Luca Savoldelli:
  Model restructured.
• 20 Dec 2004 by Francesco Casella:
  First release.