Q. s. Yuan Electricite de France centre des Renardieres Departement Application de l'Electricite 77250 Moret sur Laing, France Noncondensable gases in a condenser will reduce the heat transfer coefficient and this is the case of the mixture (steam + air) j Rll4 heat exchanger in our high temperature heat pump. This heat exchanger is a shell tube type and is for the purpose of simulating industr...

the purpose of this study is to identify parameters influence on the particle deposition within fin and tube heat exchanger of air-conditioning systems by cfd analysis. first the basic sketch of periodic geometry drawn and meshing operation including boundary conditions was performed. then the gas side properties and flow parameters were solved by ansys fluent 14.5 software. lagrangian equation...

A concentric gas-to-gas heat exchanger is designed for application as a recuperator in the domestic boiler industry. The recuperator recovers heat from the exhaust gases of a combustion process to preheat the ingoing gaseous fuel mixture resulting in increased fuel efficiency. This applied study shows the use of computational fluid dynamics (CFD) simulations as an efficient design tool for heat...

In order to improve the efficiency and rate of heat transfer in heat exchangers, various techniques such as increasing the heat transfer coefficient are proposed. This study is devoted to the investigation of heat transfer coefficient variations due to the addition of CuO, TiO2 and CuO/TiO2 nanoparticles into a shell and tube heat exchanger. CuO/TiO2 nanocomposite was synthesized using mechanic...

The paper deals with design and simulation of nonlinear adaptive control of a shell and tube heat exchanger. The method is based on factorization of the controller on a nonlinear static part and an adaptive linear dynamic part. The nonlinear static part is derived using inversion and subsequent exponential approximation of simulated or measured steady-state characteristics of the exchanger. The...

This paper is devoted to the presentation of an advanced model for the heat conduction processes within a finned tube bundle, typically found in air-cooled evaporators and condensers. As a result of the computational effort needed to simulate the desired fin-and-tube local unsteadiness, some actions have been undertaken in order to obtain reasonable simulation time consumption. A specific cutti...