CS & STC Series selection
STEP 4: Calculate the area required
Q ( BTU / HR )
89,090
Required Area sq.ft. =
= 17.68 sq.ft.
LMTD c x U ( from table C)
50.39 x 100
STEP 5: Selection a) From table E choose the correct series size, baffle spacing, and number of passes that best fits your flow rates for both shell and tube side. Note that the tables suggest minimum and maximum information. Try to stay within the 20-80 percent range of the indicated numbers. Example Oil Flow Rate = 80 GPM = Series Required from Table E = 1200 Series Baffle Spacing from Table E = 4 Water Flow Rate = 40 GPM = Passes required in 1200 series = 4 (FP) b) From table D choose the heat exchanger model size based upon the sq.ft. or surface area in the series size that will accommodate your flow rate. Example Required Area = 17.68sq.ft Closest model required based upon sq.ft. & series = CS - 1224 - 4 - 6 - FP If you require a computer generated data sheet for the application, or if the information that you are trying to apply does not match the corre- sponding information, please contact our engineering services department for further assistance.
TABLE A- FACTOR M/LMTD = L x M
Model Number TABLE D- Surface Area
Surface Area in Sq.ft.
Surface Area in Sq.ft.
S/L
M
S/L
M
S/L
M
S/L
M
Model Number
1/4" O.D Tubing C ode 6
1/4" O.D Tubing C ode 4
3/8" O.D Tubing C ode 6
5/8" O.D Tubing C ode 10
3/8" O.D Tubing C ode 6
5/8" O.D Tubing C ode 10
.25 .26 .27 .28 .29 .30 .31 .32 .33 .34 .35 .36 .37 .38 .39 .40 .41 .42 .43 .44 .45 .46 .47 .48 .49
.541 .549 .558 .566 .574 .582 .589 .597 .604 .612 .619 .626 .634 .641 .648 .655 .662 .669 .675 .682 .689 .695 .702 .709 .715
.50 .51 .52 .53 .54 .55 .56 .57 .58 .59 .60 .61 .62 .63 .64 .65 .66 .67 .68 .69 .70 .71 .72 .73 .74
.721 .728 .734 .740 .746 .753 .759 .765 .771 .777 .783 .789 .795 .801 .806 .813 .818 .823 .829 .836 .840 .848 .852 .858 .864
.75 .76 .77 .78 .79 .80 .81 .82 .83 .84 .85 .86 .87 .88 .89 .90 .91 .92 .93 .94 .95 .96 .97 .98 .99
.870 . 874 .879 .886 .890 .896 .902 .907 .913 .918 .923 .928 .934 .939 .944 .949 .955 .959 .964 .970 .975 .979 .986 .991 .995
.01 .02 .03 .04 .05 .06 .07 .08 .09 .10 .11 .12 .13 .14 .15 .16 .17 .18 .19 .20 .21 .22 .23 .24
.215 .251 .277 .298 .317 .334 .350 .364 .378 .391 .403 .415 .427 .438 .448 .458 .469 .478 .488 .497 .506 .515 .524 .533
– – –
CS-1236 CS-1248 CS-1260 CS-1272 CS-1284 CS-1296 CS-1724 CS-1736 CS-1748 CS-1760 CS-1772 CS-1784 CS-1796 CS-17108 CS-17120
35.33 47.10 58.88 70.65 82.43 94.20
50.63 67.51 84.39
17.66 23.55 29.44 35.33 41.21 47.10 23.55 35.33 47.10 58.88 70.65 82.43 94.20
CS-614 CS-624 CS-636
– – –
4.6 7.9 11.5
101.27 118.14 135.02
– – – –
CS-814 CS-824 CS-836 CS-848 CS-1014 CS-1024 CS-1036 CS-1048 CS-1060
– – – –
8.3 14.1 21.2 28.3
43.96 65.94 87.92
58.61 87.92
4.58 7.85
117.23 146.53 175.84 205.15 234.45 263.76 293.07
9.16 15.70 23.55 31.40 39.25
13.74 23.55 35.33 47.10 58.88
109.90 131.88 153.86 175.84 197.82 219.80
11.78 15.70 19.63
105.98 117.75
33.76
11.78
CS-1224
23.55
TABLE B- LMTD correction factor for Multipass Exchangers .05 .1 .15 .2 .25 .3 .35 .4 .45 .5 .6 .7 .8 .9 1.0 .2 1 1 1 1 1 1 1 .999 .993 .984 .972 .942 .908 .845 .71 .4 1 1 1 1 1 1 .994 .983 .971 .959 .922 .855 .70
TABLE E- Flow Rate for Shell & Tube
Shell Max. Liquid Flow - Shell Side
Liquid Flow - Tube Side
dia .
Baffle Spacing
SP
TP
FP
Code 1.5 2
3
4
6 Min. Max. Min. Max. Min. Max.
.6 1 1 1 1 1 .992 .980 .965 .948 .923 .840 .8 1 1 1 1 .995 .981 .965 .945 .916 .872 1.0 1 1 1 1 .988 .970 .949 .918 .867 .770 2.0 1 1 .977 .973 .940 .845 .740 3.0 1 1 .997 .933 .835 4.0 1 .993 .950 .850
600 800
15 20 30 45 50 60
20 34 36 50
25 45 50
30 60 65
– – –
3.5 7.5
20 3.5 24 48 4.5 38
2 3 5
12 21 37 56 90
1000 1200 1700 2000
10
70
10
70
70 100 125 20
120 15 112 7.5 220 29 180 14 300 45 320 25
R
65 100 140 220 30 80 100 160 240 57
5.0 1 .982 .917 6.0 1 .968 .885
160
8.0 1 .930 10.0 .996 .880 12.0 .985 .720
TABLE C
TUBE FLUID
SHELL FLUID Water 50% E. Glycol Oil 50% E. Glycol Oil
U
400 350 100 300 90
Water Water Water
14.0 .972 16.0 .958 18.0 .940 20.0 .915
50% E. Glycol 50% E. Glycol
K
note: AIHTI reserves the right to make reasonable design changes without notice.
69
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