UCN, URCN, UCF & URCF Series selection
Step 8. Select same using the performance chart.
Step 6. Select the proper diameter heat exchanger by calculating the capacity factor.
Btu/hr T s - T exit
587,169 287 - 150
Q Btu/lb
587,169 Btu/hr 920 Btu/lb
=
F s =
= 4,286 F s
F c =
= lbs/hr
= 639 lbs/hr
From the chart 1000, 3/8” tubes on page ( ) select unit landing closest on or above intersection point of 30gpm & 4,286 Btu/hr O F
From graph F or G select the proper diameter heat exchanger. Capacity 639 lbs/hr saturated steam required @ 40psig.
Selection = URCN1036-6-TP
Capacity = 639 lbs/hr = 1000 series 3/8” tubes
Step 7. Select the proper size heat exchanger from the surface area chart in table D.
Minimum surface area required = 15.9 sq.ft. = URCN1036-6-TP
TABLE A- FACTOR M/LMTD = L x M
TABLE D- Surface Area
Surface Area in Sq.ft.
Surface Area in Sq.ft.
S/L
M
S/L
M
.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 S/L
M
S/L
M
Model Number
Model Number
5/8" O.D Tubing C ode 10
3/8" O.D Tubing C ode 6
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
.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
17.0 25.5 34.0 42.5 51.0 59.5 41.2 55.0 68.7 82.5 96.2
6.5 9.8 13.0 9.1 13.7 18.3 22.9 27.5 32.0
32.2 48.3 64.4 80.5 96.6 112.7 80.1 106.8 133.5 160.2 186.9
1024 1036 1048 1224 1236 1248 1260 1272 1284
11.0 16.5 22.0 17.3 25.9 34.5 43.2 51.8 60.5
1724 1736 1748 1760 1772 1784 2036 2048 2060 2072 2084
TABLE E- Flow Rate for Shell & Tube
Liquid Flow - Tube Side
Shell dia. Code
3/8" TP
5/8" TP
3/8" FP
5/8" FP
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
1000 5 5 37 5 33 1200 5 100 5 100 7.5 56 7.5 50 1700 10 180 10 160 14 90 14 80 2000 15 340 15 300 25 160 25 145 60 5 60
GRAPH F
Maximum Steam Capacity Lbs/hr vs Pressure PSIG 5/8" Tubes
Maximum Steam Capacity Lbs/hr vs Pressure PSIG 3/8" Tubes
1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000
1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000
2000
2000
1700
1700
1200
1200
1000
1000
0 500
0 500
0
10
20
30
40
50
60
70
80
90 100
0
10
20
30
40
50
60
70
80
90 100
Steam Pressure PSIG
Steam Pressure PSIG
note: AIHTI reserves the right to make reasonable design changes without notice.
133
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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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