dynaflow lecture, march 11th 2010, · dynaflow lecture, march 11th 2010, ... htfs, heat transfer...
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Heat exchangers
Dynaflow Lecture,March 11th 2010,
Johan van der Kamp
Bronswerk Heat Transfer BVDynamic Heat Exchange Solutions
Mission:To provide solutions for challenges in heat transfer and fluid-flow systems
Definition of heat exchanger
A heat exchanger is a device in which heat (energy) is transferred from a hot fluid to a colder fluid; the fluids are separated by a wall so that they can not mix.
A Water to air heat exchanger
Plate & Frame heat exchanger
Shell & Tube Heat Exchanger
Air heater or air cooler element
Air cooled heat exchanger
Compact heat exchanger
Energy (heat) transferred, Q [W]Heat Transfer Coëfficiënt, k [W/m2.K]Heat transfer area, A [m2]Local temp diff between two fluids, dT [K]Local: Q = k * A * dT
Energy (heat) transferred, Q [W]
For the total heat exchanger:Q = k * A * LMTD
Log mean temp difference [K]
)}/()ln{()()(
tiTutuTitiTutuTiLMTD−−−−−
=
Heat Transfer Coefficient
⎟⎠⎞
⎜⎝⎛ ++++
=
iRi
diduRu
u
k
αλδ
α1*1
1
Thermal design
HTRI, Heat Transfer Research Institute,HTFS, Heat Transfer & Fluid flow Service, part of ASPEN.
Fundamental Research on heat transferResearch papers, handbook sheets, manualsComputer programs
DesignRating / checkingSimulation
Flow modelling
CFD, Computational Fluid Dynamics, (EFD), Engineering Fluid Dynamics
Fluid flow,Heat transfer,
Very time consuming on in- and output,And high calculation times
Flow modelling
Mechanical Design
Code calculationsUS: ASME VIII Div 1 & 2,Europe: PED 97/23/EC
Stoomwezen regelsBritish StandardsADMerkblaetterCodap etc.
Russia: Gost-RChina: Press vess Code
Mechanical Design
CustomersspecificationsStandards of the TEMAAPI
Finite element calculations
Finite element calculations
Finite element calculations
END
Thank you