Survey of the Dependence between the Classic Sizes

Survey of the Dependence between the Classic Sizes and the Property Thermophysics in a Shell and Tube Heat Exchanger ELOUARDI EL MOKHTAR Laboratory of Mechanics and Energetic , Department of Physics, Faculty of the sciences, BP 20, El Jadida, Morocco, dataelouardi@gmail, com

SURVEY OF THE SHELL AND TUBE HEAT EXCHANGER Empiric laws Important mistakes Interest of the survey of the influence of the Property Thermophysics in the performances a Shell and Tube Heat Exchanger

SHELL AND TUBE HEAT EXCHANGER Shell and tube heat exchanger Elementary Representation of Shell and tube heat exchanger

ENCOMBREMENT 30° Triangular 600° Rotated Triangular 90° Square Position of the tubes in the shell and tube heat exchanger 45° Rotated

BIBLIOGRAPHIC SYNTHESIS ss ity l a am u Q ste x Le ng The global coefficient Of transfer flu th Ma of Ma s sd eb it eat h c i f i spec Our contribution is the survey of the dependence of the global coefficient of transfer and the property thermophysics

The difficulties met by the users of shell and tube heat exchanger are various and varied to reason the : on P PT the l a f ace ti o n e ate urf u l t s Inf he s ge t han c ex Parameters are numerous ac co PTP no rdin va n l g ry ine to ar T in wa a y Mauvais Bad dimensionality dimensionnement et and working fonctionnement Th e ma mo ke del s a the ppe don PT ar a 't ll P Imprecise empiric laws d a es s ee te ma ti r Siz Less suppositions their of calculation of the shell and tube heat exchanger

Hypothèses of the model All elements of a given stream have the same thermal history; The shell and tube heat exchanger is at a steady state; Specific heat is variable ; The heat transfer coefficient is variable; There are no heat losses from the shell and tube heat exchanger; The flow is a counter-current;

Calculation of shell and heat exchanger Surface of exchange Coefficient global transmission K

Calculation of the gap of the temperature F depend the R and G

Modelling shell and tube heat exchanger

Thermal balance

With KS 0 m 0;

Quantitative evolution of the temperatures in the tubular intersection to against current

Variation of KS according to m for values of constants.

Logarithmic representations the variation of KS in function the values of positive m for constants values.

Logarithmic representations the variation of KS in function the values of a negative m for constants values.

Conclusion Model without coefficient of F interrelationship KS = f(m) hyperbolic profile the gotten results are in agreement with the results found in the bibliography K and S vary the other way around expérimental validation Shell and tube heat exchanger uses in the phosphoric acid concentration process better description of the working of the shell and tube heat exchanger and therefore of proceeds

Perspectives validation of this model by some proceeds that use the shell and tube heat exchanger; Relation between K, A, M, R and G; Relation between the coefficient of transfer and the loss some load; Optimization of M; Survey of the stability of the shell and tube heat exchanger; Relation between the clogging and pressure of fluidization;