Search results for "Plate fin heat exchanger"

showing 3 items of 3 documents

Local Effects of Longitudinal Heat Conduction in Plate Heat Exchangers

2007

Abstract In a plate heat exchanger, heat transfer from the hot to the cold fluid is a multi-dimensional conjugate problem, in which longitudinal heat conduction (LHC) along the dividing walls often plays some role and can not be neglected. Large-scale , or end-to-end, LHC is always detrimental to the exchanger’s effectiveness. On the contrary, if significant non-uniformities exist in the distribution of either convective heat transfer coefficient, small-scale , or local, LHC may actually enhance the exchanger’s performance by improving the thermal coupling between high heat transfer spots located on the opposite sides of the dividing wall.

Fluid Flow and Transfer ProcessesMaterials scienceConvective heat transferMechanical Engineeringlongitudinal heat conductionPlate heat exchangerThermodynamicsconjugate heat transferHeat transfer coefficientMechanicsHeat sinkCondensed Matter Physicsplate heat exchangerHeat transferHeat spreaderMicro heat exchangerPlate fin heat exchangerSettore ING-IND/19 - Impianti Nucleari
researchProduct

Enhancement of heat exchanger thermal hydraulic performance using aluminum foam

2018

Abstract This paper deals with an experimental study of a turbulent forced convection in a rectangular channel partly fitted with aluminum metallic foam blocks. Experiments were carried out on samples having a constant porosity of 93.8%, different grades of 5, 20 and 40 PPI, and three different height ratios of 0.6, 0.8 and 1. The blocks were arranged in a baffle like configuration. A constant heat flux of 2 W/cm2 was applied on the bottom wall of the test section, while air velocity was varied from 1 to 5 m·s−1. Temperatures of the wall along the flow direction as well as those of the inlet and outlet sections have been measured. Additionally, pressure drop measurements across the aluminum…

Fluid Flow and Transfer ProcessesPressure dropMaterials science020209 energyMechanical EngineeringGeneral Chemical EngineeringPlate heat exchangerAerospace EngineeringBaffle02 engineering and technology021001 nanoscience & nanotechnologyForced convectionNuclear Energy and EngineeringHeat fluxHeat transfer0202 electrical engineering electronic engineering information engineeringPlate fin heat exchangerComposite material0210 nano-technologyShell and tube heat exchangerExperimental Thermal and Fluid Science
researchProduct

Large-Eddy Simulation of Flow and Heat Transfer in Compact Heat Exchangers

1994

LES results are presented for different heat exchanger geometries. Subgrid terms were usually computed by the Smagorinsky model; preliminary comparative results are also given for the ‘dynamic’ subgrid model. The numerical methods used were those implemented in a commercial general-purpose code (CFDS-FLOW3D); they included a finite-volume approach, colocated body-fitted grids, central differencing for the advection terms, the SIMPLEC algorithm, and Crank-Nicolson time stepping. Predictions arc compared with experimental measurements (including local Nu distributions), and with results from a low-Reynolds number k-e model. In most cases, LES was more ‘robust’ and required little more CPU tim…

Plate heat exchangerMechanicsComputational Fluid DynamicSIMPLEC algorithmLarge Eddy SimulationPhysics::Fluid DynamicsNTU methodMoving bed heat exchangerHeat transferCompact Heat ExchangerMicro heat exchangerPlate fin heat exchangerSettore ING-IND/07 - Propulsione AerospazialeSettore ING-IND/19 - Impianti NucleariLarge eddy simulation
researchProduct