Heat exchanger heat transfer coefficient and CFD modelling

被引：0

作者：

Mas, David ^{[1
]}

Vimeux, Sebastien ^{[1
]}

Clauzade, Bertrand ^{[1
]}

Lucas, Pierre ^{[1
]}

Hochet, Francois ^{[2
]}

Melot, Vincent ^{[2
]}

Thuaud, Damien ^{[2
]}

机构：

[1] Naval Energies, Nantes, France

[2] Naval Grp, Nantes, France

来源：

OCEANS 2019 - MARSEILLE | 2019年

关键词：

OTEC; heat exchanger; evaporator; CFD model; performance; prototype; 2-phase flow; TUBE; FLOW;

D O I：

10.1109/oceanse.2019.8867541

中图分类号：

U6 [水路运输]; P75 [海洋工程];

学科分类号：

0814 ; 081505 ; 0824 ; 082401 ;

摘要：

Heat exchanger performance assessment with a high precision level is one of the key success factors for OTEC. Evaluating heat transfer coefficient with high precision in OTEC working conditions - specifically low heat flux, low mass flux, and large dimensions - is not possible by applying existing methods, models, and heat transfer laws. Initial analysis shows that heat transfer is driven by thermal and hydraulic parameters, which are linked, and therefore require 2D or 3D numerical models to be accurately modelled. Naval Energies and Naval Group have therefore defined and applied a heat transfer qualification method to correlate a 3D CFD thermo-hydraulical model based on ANSYS Fluent code with reduced scale testing on a water/ammonia flooded shell & tube evaporator. The results meet the high expectations as an uncertainty of less than 10% was achieved on the shell side heat transfer coefficient of the flooded shell & tube evaporator in 2 phase flow conditions, lowering the uncertainty of Rankine Cycle electrical production to 2%.

引用

页数：5

共 8 条

[1] Local heat transfer analysis for boiling of hydrocarbons in complex geometries: A new approach for heat transfer prediction in staggered tube bundle [J].