66.045.126:66.011 
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This paper investigates the feasibility of a modern, compact heat exchangers for preheating the crude oil 
block. The difference between fouling deposition term and fouling removal term was calculated, as well as the 
threshold values of the shear stress at which fouling not starting. The importance of taking into account changes 
in the physical properties during the selection process of the necessary equipment is shown with the help of ta-
bles and graphs.
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, T Tout, , Tout,
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[ / ] in, [°C] [°C] [ / ] Tin, [°C] [°C] 
01 10000 205 44 100000 32 51,3 55,46 
02 20000 290 83 100000 51,3 96,5 112,38 
03 50000 254,6 206,5 100000 96,5 120,5 122,6 
04 40000 220 148,2 100000 116 147,1 226,23 
05 60000 280 193 100000 147,1 199,3 412,32 
06 10000 280 208,5 100000 199,3 206,2 87,67 
07 50000 360 254,6 100000 206,2 256,4 353,21 
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dR A C u T 2 / 3 2 / 3 4 / 3
f m f s C
dt 1 B u 3 C 2 1/ 3 1/ 3 T 2 / 3 exp E / RT m w ; (1) 
m f s s
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:
A -10 2/3 1/3 5/3 -1 -1/3 -1m=7,93·10 K ( ) ;
Bm=1,8·10-5 13/3 2/3 8/3K-2/3;
m=1,6·10-5 6/5 4/5 -2/3 -1 -1;
E=52100 / ;
R=8314 .
de
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C f 0,0791 u de /
0,25 ;  (2) 
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C u2w f / 2 ;  (3) 
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de0,25 2 2 0,25u w0,25 0,75 ; (4) 0,0791
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12 1/12
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A p4 ln p50,9 ; (7) 7 p3 0, 27 10 5
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p1 exp 0,15705 ; (8) 
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p2 ; (9) 
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p3 exp 12 ; (10) 180
2,63
p4 0,061 0,69 tg 1 1 0,9 0,01 ; (11) 
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p5 1 ; (12) 
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w,
0,01012 0,00883 0,00629 0,00615 0,00532 0,00506 0,00555 
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-0,00282 -0,00017 -0,00039 -0,00005 0,000369 0,000901 0,001204 
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Ts, w, w*,
-01 69,44 0,622 2,017 
-02 118,62 3,682 3,767 
-03 169,28 20,758 5,704 
-04 156,46 33,517 5,203 
-05 204,04 99,916 7,092 
-06 218,26 186,438 7,672 
-07 266,5 312,379 9,685 
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1.  243  01.03.2010 243 «
 2010-2015 » // -
, 2010 –  16. 
2. .
-  / . , . . , . , , . . , . . ,
. . , . .  //  IX  «
, ». . 2. . -
. – 1996. – . 46. 
3. Francesco Coletti, Sandro Macchietto, Graham . ll . Effects of fouling n performance of retrofitted 
heat exchanger networks:  thermo-hydraulic based analysis. Computers and Chemical Engineering 35 
(2011) 907-917. 
4. Mengyan Yang, Barry Cittenden, Fouling thresholds in bare tubes and tubes fitted with inserts. Applied 
Energy, 89, 2012, 67-73. 
5. . .
. //  " " – 
2012 - 10 – . 13-28. 
6. . .
. //  – :
 " ", 2010 – 4 – . 112-117. 
7. Elvis Koku Tamakloe, Graham Thomas Polley, Martin Picon-Nunez. Design of Compabloc exchangers to 
mitigate refinery fouling. Applied Thermal Engineering, 2012, 1-8. 
 664.723.047 
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Study of the processes of dehydration of food raw materials under the influence of the electromagnetic mi-
crowave field. Development of a mathematical model of heat in the microwave energy supply. Experimental dry-
ing system with microwave energy input.
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