catalog

STEP 4: Calculate the area required FBF Series selection

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 = FBF-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

TABLE D- Surface Area

S/L

Surface Area in Sq. ft.

Model Number

.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

3/8" O.D. Tubing

5/8" O.D. 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

FBF-1014 FBF-1024 FBF-1036 FBF-1048 FBF-1224 FBF-1236 FBF-1248 FBF-1260 FBF-1272 FBF-1624 FBF-1636 FBF-1648 FBF-1660 FBF-1672 FBF-1684

9.1

4.6 7.8

16.0 24.0 32.0 23.6 35.3 47.1 58.9 70.6 41.0 62.0 82.0

11.8 15.8 11.8 17.7 23.6 29.5 35.4 23.6 35.3 47.1 58.9 70.7 82.5

103.0 124.0 145.0

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

Code 1.5 2

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

1000 24

35 60 70

–

20 120 10 70 5.0 37

1200 35

45 70 100 120 30 220 15 112 7.5 56

1600 38

70 150 200 220 57 300 29 180 14

5.0 1 .982 .917 6.0 1 .968 .885

TABLE C

TUBE FLUID

SHELL FLUID Water 50% E. Glycol Oil 50% E. Glycol Oil

8.0 1 .930 10.0 .996 .880 12.0 .985 .720

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

note: AIHTI reserves the right to make reasonable design changes without notice.

355 American Industrial Drive LaCrosse, VA 23950

tel: 434-757-1800

fax: 434-757-1810

email: sales@aihti.com

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