AB, SAE, STS, & EAB 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 = C ba ffle 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= AB-1202-C6-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 correspond- ing information, please contact our engineering department for further assistance.
TABLE A- FACTOR M/LMTD = L x M
TABLE D- Surface Area
1/4" O.D 3/8" O.D 5/8 O.D Surface Area in Sq.ft.
Surface Area in Sq.ft.
S/L
M
S/L
M
S/L
M
S/L
M
Model Number
Model Number AB-401 AB-402 AB-403 AB-701 AB-702 AB-703 AB-704 AB-705
1/4" O.D 3/8" O.D
5/8 O.D Tubing
.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
Tubing
Tubing
Tubing
30.03 45.04 60.05 Tubing
17.66 26.49 35.33 44.16 52.99 61.82 70.65 79.48 88.31 Tubing
.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
AB-1602 43.96 AB-1603 65.94 AB-1604 87.92
1.52 3.04 4.56 3.73 7.46
– – –
– – – – – – – –
AB-1605 109.90 75.07 AB-1606 131.88 90.08 AB-1607 153.86 105.09 AB-1608 175.84 120.11 AB-1609 197.82 135.12 AB-1610 219.80 150.13 AB-1611 241.78 165.14
2.65 5.30 7.95
11.19 14.92 18.64
10.60 13.25 11.78 16.66 23.55 29.44 35.33 17.66 26.49 35.33 44.16 52.99 61.82
97.14 AB-1612 263.76 180.16 105.98 AB-1613 285.74 195.17 114.81
AB-1002 17.66 AB-1003 26.49 AB-1004 35.33 AB-1005 44.16 AB-1006 52.99 AB-1202 25.32 AB-1203 37.97 AB-1204 50.63 AB-1205 63.29 AB-1206 75.95 AB-1207 88.61
5.89 8.83
11.78 14.72 17.66
AB-2004 155.43 110.69 AB-2005 194.29 138.36 AB-2006 233.15 166.03
60.84 76.05
91.26 AB-2007 272.00 193.70 106.47 AB-2008 310.86 221.37 121.68 AB-2009 349.72 249.04 136.88 AB-2010 388.58 276..71 152.09 AB-2011 427.43 304.38 167.30 AB-2012 466.29 332.06 182.51 AB-2013 505.15 359.73 197.72 AB-2014 544.01 387.40 212.93 AB-2015 582.86 415.07 228.14
8.8
13.25 17.66 22.08 26.49 30.91 35.33 39.74 44.16
AB-1208 101.27 70.65 AB-1209 113.92 79.48 AB-1210 126.58 88.31
TABLE E- Flow Rate for Shell & Tube
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
Shell Max. Liquid Flow - Shell Side
Liquid Flow - Tube Side
dia .
Baffle Spacing
SP
TP
FP
Code A
B
C
D
E 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
400 700
10 17 24 29 38
15 29 48
20 30 68
–
– – –
3.5
21
–
–
–
–
35 70
9
61 4.5 30 2.2
15 37 56 90
1000 1200 1600 2000
20
120 10
70 5.0
56 105 115 120 30 70 150 200 220 57
250 15 112 7.5 460 29 180 14 650 45 320 25
R
–
–
190 370 550 90
160
5.0 1 .982 .917 6.0 1 .968 .885
8.0 1 .930 10.0 .996 .880 12.0 .985 .720
TABLE C
TUBE FLUID SHELL FLUID
U
400 350 100 300 90
Water Water Water
Water 50% E. Glycol Oil 50% E. Glycol Oil
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.
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tel: 434-757-1800 355 American Industrial Drive LaCrosse, VA 23950
email: sales@aihti.com fax: 434-757-1810
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