.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

Revisions

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