Thermal Environmental Engineering, 3rd. Ed. T. H. Kuehn, J. W. Ramsey and J. L. Threlkeld Prentice-Hall ISBN 0-13-917220-3 First Printing Errata last updated 5/19/05 Ch. 2 1.86t = 2501 + 1.86t
p. 20
The first line of Eq. (2.36) should read;
p. 27 27
The nu numerato ratorr of of th the ri right han hand si side of Eq Equatio tion (2 (2.57 .57) sho shou uld be 2, 2, no not 1. 1.
p. 28
The The enti entire re term term in the the squa square re brac bracke kets ts on the the righ rightt hand hand side side of the the equa equati tion on for for NuL,conv should be raised to the power 1/15.
p. 46
Prob Proble lem m 2.16 2.16.. The The seco second nd sent senten ence ce shou should ld read read;; The The mass mass flow flow rate rate is 1.0 1.0 lbm lbm/min, /min, .... Part a) should read; Determine the average boiling heat transfer coefficient if the tube length is 10 ft. Part b) should read; Compute the temperature difference needed.
hw
kJ/kg.
Problem 2.17. The specified information should read; mass flow rate = 1.0 lbm/min, not mass velocity = 10 lbm/min. Ch. 4
p. 74
Tabl Tablee 4.1. 4.1. The The refe refere renc ncee to refr refrig iger eran antt 143a 143a in the the firs firstt colu column mn shou should ld be chan change ged d to 134a.
p. 76
Item number 4 should read: High latent heat of vaporization.
p. 88
Part art (c). The first irst equ equation tion refe eferen renced ced sho should be (4.11 .11) not (3.22 .22). The first equation should be changed to read
4 w5
=
(1.20)(14.3)(144)(21.4) & ! 200 # (0.2)(778)
(' " 14.3 $
0.1667
) % 1+ 187.7 Btu/lbm * =
p. 95
5th 5th line line from from bott bottom om,, the the refe refere renc ncee to Eq.( Eq.(4. 4.8) 8) shou should ld be chan change ged d to Eqs. Eqs. (4.9 (4.9), ), (4.10).
p. 111
Prob roblem lem 4.6. .6. The last last line line shou hould refe efer to Fig. ig. 4.7, .7, not 4.8. .8.
Ch. 5
p. 143
Table ble 5.4. .4. The units its on tempe emperratu ature sho should be °C, not °F. °F.
p. 149 149
Prob Proble lem m 5.2 5.2.. Incl Includ udee the the spec specif ific icat atio ion n tha thatt x=0 x=0.2 .25 5 in in the the prob proble lem m sta state teme ment nt.. Problem 5.12. Part b) should be 50 °C, not 40 °C.
Ch. 7
p. 178
Item number 3. Change the last portion to: ... and the temperature is 59 °F (101.325 kPa, 15 °C).
p. 179
In the line “dry air”, omit the degree symbol before K. In the line “water vapor”, R v should be Rw and the degree symbol should be omitted on the next line before K. The equation for W should read:
W
mw =
ma
.
p. 189
12th line from top, P should be P w.
p. 191
Eq. (7.40) should read:
p. 193
3rd line from bottom, the ratio of scale factors should be
!h
=
!hS
+
!h L .
sh s W
, not
S h S W
.
Ch. 8
p. 211
13th line from bottom, mass flow rate should be: 235 lbm a /hr, not 235 lbma /min.
p. 212
9th line from bottom should refer to Eq. (8.23), not Eq. (8.20)
p. 214
The second equation from the top should read !w
p. 228
=
W 2 " W 1 W s
*
" W 1
The10th line from top should refer to Table A.1SI, not Table A.6SI.
Ch. 10
p. 265
Equation (10.4). The last multiplier on the left hand side of the equation should be (hg,t -hf,w) not hfg,w . Equation (10.5). The last multiplier on the left hand side of the equation should be (hg,t -hf,w) not hfg,w .
p. 269
The last term in Equations (10.12) and (10.13) should read: ˙ a dWh f ,w m
p. 270
Equation (10.19) should read:
"#t w
p. 279
Equation (10.43) should read:
NTU
p. 280
The last two equations in the example should read: " 1 ! 0.6 % ! ln $ NTU /(1 ! 0.67) 1.22 #1 ! 0.6(0.67) & ˙ "w (1.22)(0.67)(746,000) NTU m 3 5076 ft V h D AV 120 =
=
=
=
˙a m ˙ wc w m
f ,W
# 1 ! " % /(1 ! C ) ! ln $ 1 ! " C &
=
=
(#h " #Wh )
=
The third line from the bottom of the example should read: This volume is 30 percent less than the value computed in Ex. 10.3 and 29 percent less .... Ch. 11
p. 303
Table 11.3. The units for thermal conductivity, k, on the fifth row should be: Btu/hr·ft·°F.
p. 312
Figure 11.18. The scale on the right hand side of the figure is not correct. The values on the left should be multiplied by 4.186 to obtain the correct values for units of kJ/kga °C. The scale in SI units should range from zero to about 16 kJ/kg a °C.
p. 320
The location of some of the brackets in Eqn. (11.70) is incorrect. The correct equation should be: t F , m
=
# %$
t ! " 1 !
& (t ! t R ) hi AP, i ( ' U o Ao
p. 326
Problem 11.5. The outer radius of the tube should be 0.5 in., not 0.125 in.
p. 327
Problem 11.6. Add the specification that the fin half thickness is y = 0.05 mm.
Ch. 12 v
p. 334
Figure 12.1. The thermal resistance near the bottom of the figure should be: 1/ h E Acl ,w
p. 337
The equation near the top of the page should read: 0.39 1.056 Btu/hr·ft2 ·°F. hC (2 ! 0.85) =
=
Second equation from the top should read: t o =
1.056 x75°F + 0.83 x80° F 1.056 + 0.83
= 77.2°F
p. 340
Example 12.3 Everywhere lbm v appears it should be replaced by lbm w
p. 341
Example 12.4 Everywhere lbm v appears it should be replaced by lbm w The equation for W ex should read: Wex = 0.0265 + 3.6 x 10 -5 (75) + 0.2(0.0092) = 0.0310 lbm v /lbma. The last equation in Example 12.4 should read: Q&lat =(2.38 lbm a /hr)(0.0310-0.0092) lbm v /lbma(1038.2 Btu/lbm v ) = 54.0 Btu/hr.
p. 344
In the equation for F P-1&2, the tangent functions(tan) should be replaced by inverse tangent functions(tan -1).
p. 347
Figure 12.5. The value on the abscissa should be ET* , not ET.
p. 354
The equation for PMV should be PMV = a*t + b*P w +c*.
p. 355
Table 12.5. The headings should be Pw , not Pv The equation for W should be W 0.6219Pw /( P ! Pw ) . =
p. 356
Figure 12.8. The labels on the abscissa(predicted mean vote) to the left of zero should be negative.
Ch. 13
p. 394
The last term in the equation for F s should be: (a b tan " )(c b tan # ) . !
!
a c $
p. 396
Figure 13.15. The labels on the vertical axis, 1000 and 1250, should be interchanged.
p. 406
Example 13.5. In the first line of the solution, the second angle should be
p. 410
Problem 13.8. The last sentence should read: Determine the number of hours that the south-facing side would be sunlit by direct solar radiation on June 22.
p. 410
Problem 13.9. Add the following information; “Assume the sun is a sphere with diameter D s = 1.39 x 106 km.”
! = "15° .
Problem 13.10. The solar radiation units should be Btu/day ft 2 , not Btu/hr ft2 . p. 413
Problem 13.32 part a). The symbol for the azimuth angle should be
!
not !.
Ch. 14
p. 418
Figure 14.1. The heat flux labeled qs should be
p. 421
Table 14.3. The heading “Effective Emittance of Air Space” refers to only the last two columns on the right-hand side of the table, not to the column labeled “Average Emittance”.
p. 452
9th line from the bottom, A w should be A l.
p. 464
Example 14.5. In the table, the vapor resistance of the insulation should be 0.047 Rep and the total vapor resistance should be 2.28 + Z vr Rep.
p. 465
Example 14.5. The last two equations should read: At plane 4, ... -2.28 = 12.2 Rep At plane 5, ... -2.28 = 15.2 Rep The first sentence in the last paragraph should read: Therefore we would select a vapor retarder with a resistance greater than 15.2 Rep.
p. 467
Problem 14.10 part b). The location is Denver, Colorado, not Madison, Wisconsin.
˙
qc . ˙
Problem 14.11 should read: The dimensions of the basement floor in Prob. 14.10 are ...
p. 469
Problem 14.20. The last paragraph of the problem statement should read: “Using an indoor design temperature of 70 °F and the 97.5 percent outdoor design temperature for Chicago( t = 37.4 °F ), calculate the following:” a
Problem 14.20. The second part (d) at the end of the problem should be changed to part (f). Ch. 15
p. 526
Problem 15.3. Add the following to the problem statement: The outdoor dry bulb temperature is 10 °F.
p. 526
Problem 15.4. Change the reference to Prob. 15.3 to Table 15.3.
p. 526
Problem 15.5. The last line of the problem statement should read: ... common brick walls with t i = 75 °F.
p. 527
Problem 15.13. The surface areas should be 300 ft 2 and 200 ft 2 , not 30 m2 and 20 m 2 .
p. 528
Problem 15.27. The gas cost in part (a) should be one cent per thousand Btu, not ten cents per thousand Btu.
Ch. 16
p. 534
The last terms on the right-hand sides of equations (16.1) and (16.2) that are written in terms of (w ICL) should be divided by the area, A.
p. 534
Example 16.1. Change the last sentence of the problem statement to: Assume a medium construction, an 8-in. uncovered concrete floor, and a very high air circulation rate.
p. 537
Table 16.3. Subheadings over the columns for the days should be ICL/A, not ICL.
p. 538.
Table 16.4. Subheadings over the columns for the days should be ICL/A, not ICL.
p. 553
Table 16.13. The footnote at the bottom should refer to Table 16.10, not Table 6.10.
p. 556
Problem 16.10. The first sentence should read: Determine the hourly cooling load per square foot of wall-surface area.... Problem 16.16. Add the following to part c): SC = 0.4.
p. 557
Problem 16.18. The last sentence should read: The average daily outdoor temperature is 32 °C and the indoor temperature is 24 °C.
Ch. 17
p. 562
Eqn. 17.12. The left hand side should be RLC, not RCL.
p. 564
Equation 17.15 should be: LF "
Qloss # Qgain ˙
˙
Qcapacity ˙
Second line from the bottom of the page: Qoutput should be changed to Qcapacity ˙
˙
p. 573
Example 17.4. The 4th sentence should read: The building is occupied MondayFriday from 7 a.m. until 7 p.m.
p. 575
The last column of Table 17.4, Total Hrs Unoccupied, should be changed to the following values: 522, 515, 480, 477, 516, 510, 498, 396, 289, 181, 102, 61, 40, 16, 10, 4, 2, 1.
p. 577
Table 17.6. Change columns B, F, H and I to the values given below: B
F
H
I
522
26
0
121
515
102
0
471
480
171
0
786
477
249
0
1141
516
359
0
1636
510
446
0
2020
498
498
1188
3415
396
396
3784
5529
289
289
4801
6053
181
181
4264
5032
102
102
3100
3522
61
61
2264
2510
40
40
1749
1905
16
16
804
864
10
10
566
602
4
4
252
2 65
2
2
138
1 45
1
1
75
78
The last entry at the bottom of column I should be changed to 36095. p. 581
Problem 17.4 Estimate the amount of natural gas required for the month of January, not one year. Problem 17.12. The last two lines from the bottom should read: ... 68 °F, and the furnace capacity is 130,000 Btu/hr with ! = 0.88. Heating value of fuel oil is 140,000 Btu/gal. s
p. 582
Eliminate the line containing Qoutput in the list of symbols. ˙
Ch. 18
p. 595
the second equation for V (unnumbered) should be divided by the specific heat capacity of moist air, c p .
p. 637
3rd line from top, figure referenced should be 18.18b, not 18.18a.
˙
8th line from top, figure referenced should be 18.18b, not 18.18a. 11th line from top, equation referenced should be 18.20, not 18.31. p. 639
Figure 18.32. Add the scale factor, 1” = 20’.
p. 640
Figure 18.33. Add the following distances between points shown on the figure: 150 ft. between 1 and 2; 130 ft. between 3 and 4; 100 ft. between 5 and 6; and 130 ft. between 7 and 8.
p. 641
Problem 18.25. The word “pressure” is misspelled. Diffuser pressure drop should be 12 Pa, not 0.05 in. water. Figure 18.35. Lengths of straight duct should be in meters, not feet. Problem 18.27. In second line, the word rectangular should be replaced by the word round.
p. 642
Figure 18.38. Distances should be given in meters, not feet.
Ch. 19
p. 651
The last line before Example 19.3 should read: k = f Leq /D or Leq = k D/f .
p. 657
Figure 19.6. The headings at the top of the figure should be changed from 0, 250, 500, ... to 0, 1, 2, ....
p. 664
Example 19.6. Third line from the bottom of the problem statement, change 10 ft to 3 ft.
p. 665
Table 19.6. The word strainer is misspelled in thr first column. Change 4.4 to 2.89 in the third and fourth columns. Change 30.3 to 28.8 at the bottom of the fourth column. Third and fourth lines from the bottom of the example; change the two values 30.3 to 28.8.
p. 667
13th line from bottom. Head loss per unit length should be 3.2 ft water/100 ft, not 3/2.
p. 670
In the equation 3rd line from top. Denominator should be: 1-110 kPa/125kPa, and the result should be 0.25 m 3 , not 0.21 m 3 .
p. 670
Problem 19.10. The problem statement should read; If the NPSHR for a pump is 15m water, how large a velocity can the pump have at the inlet if the static pressure at the suction equals standard atmospheric pressure and the water temperature is 30°C?
p. 670
Problem 19.15. Second sentence should read: Use 1” Type-L copper ...
p. 671
Problem 19.16. The flow rate in part (a) should be 7 L/s, not 1500 L/s.
Appendix A
p. 703
Table A.6SI. The specific heat for saturated liquid at 30 °C should be 4.183, not 4.813.
Index
p. 739
Solar radiation, direct, shading of surfaces from, should refer to pages 392-96, not 292-96.
