Thermal Environmental Engineering, 3rd. Ed. T. H. Kuehn, J. W. Ramsey and J. L. Threlkeld Prentice-Hall ISBN 0-13-917220
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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 p. 20
The first line of Eq. (2.36) should read; hw = 2501 + 1.86t kJ/kg.
p. 27
The numerator of the right hand side of Equation (2.57) should be 2, not 1.
p. 28
The entire term in the square brackets on the right hand side of the equation for NuL,conv should be raised to the power 1/15.
p. 46
Problem 2.16. The second sentence should read; The mass flow rate is 1.0 lbm/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. 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
Table 4.1. The reference to refrigerant 143a in the first column should be changed to 134a.
p. 76
Item number 4 should read: High latent heat of vaporization.
p. 88
Part (c). The first equation referenced should be (4.11) not (3.22). The first equation should be changed to read (1.20)(14.3)(144)(21.4) 200 0.1667 − 1 = 187.7 Btu/lbm 4 w5 = 14.3 (0.2)(778)
p. 95
5th line from bottom, the reference to Eq.(4.8) should be changed to Eqs. (4.9), (4.10).
p. 111
Problem 4.6. The last line should refer to Fig. 4.7, not 4.8.
Ch. 5 p. 143
Table 5.4. The units on temperature should be °C, not °F.
p. 149
Problem 5.2. Include the specification that x=0.25 in the problem statement. 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.
p. 189
In the line “water vapor”, Rv should be Rw and the degree symbol should be omitted on the next line before K. m The equation for W should read: W = w . ma 12th line from top, P should be Pw.
p. 191
Eq. (7.40) should read: Δh = ΔhS + ΔhL .
p. 193
3rd line from bottom, the ratio of scale factors should be
sh S , not h . sW SW
Ch. 8 p. 211
13th line from bottom, mass flow rate should be: 235 lbma /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 ηw =
p. 228
The10th line from top should refer to Table A.1SI, not Table A.6SI.
W2 − W1 Ws * − W1
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: m˙ a dWh f ,w
p. 270 €
Equation (10.19) should read: −Δt w =
p. 279 p. 280
1−ε Equation (10.43) should read: NTU = − ln /(1 − C) 1 − εC € The last two equations in the example should read: 1− 0.6 NTU = − ln /(1 − 0.67) = 1.22 1 − 0.6(0.67) NTUm˙ ′w (1.22)(0.67)(746,000) V= = = 5076 ft 3 hD AV 120 2
€
m˙ a (Δh − ΔWh f ,W ) m˙ wc w
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/kga °C.
p. 320
The location of some of the brackets in Eqn. (11.70) is incorrect. The correct equation should be: U A t F, m = t − φ 1− o o (t − t R ) hi AP, i
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 p. 334
Figure 12.1. The thermal resistance near the bottom of the figure should be: 1/ hE v Acl ,w
p. 337
The equation near the top of the page should read: hC = (2 − 0.85)0.39 = 1.056 Btu/hr·ft2 ·°F. Second equation from the top should read: 1.056x75°F + 0.83x80°F to = = 77.2°F 1.056 + 0.83
p. 340
Example 12.3 Everywhere lbm v appears it should be replaced by lbmw
p. 341
Example 12.4 Everywhere lbm v appears it should be replaced by lbmw The equation for Wex 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) lbmv /lbma(1038.2 Btu/lbm v ) = 54.0 Btu/hr.
p. 344
In the equation for FP-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*.
3
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 Fs should be: (a − b tanδ )(c − btan γ ) . 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 Ψ = −15° .
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 Ds = 1.39 x 106 km.” 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 Ψ not φ.
Ch. 14 p. 418
Figure 14.1. The heat flux labeled q˙ s should be q˙ c .
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, Aw should be Al.
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 + Zvr 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. Problem 14.11 should read: The dimensions of the basement floor in Prob. 14.10 are ...
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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 a = 37.4 °F ), calculate the following:” 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 ti = 75 °F.
p. 527
Problem 15.13. The surface areas should be 300 ft2 and 200 ft2 , not 30 m2 and 20 m2 .
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 ≡
Q˙ loss − Q˙ gain Q˙ capacity Second line from the bottom of the page: Q˙ output should be changed to Q˙ capacity €
5 €
€
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 522 515 480 477 516 510 498 396 289 181 102 61 40 16 10 4 2 1
F 26 102 171 249 359 446 498 396 289 181 102 61 40 16 10 4 2 1
H 0 0 0 0 0 0 1188 3784 4801 4264 3100 2264 1749 804 566 252 138 75
I 121 471 786 1141 1636 2020 3415 5529 6053 5032 3522 2510 1905 864 602 265 145 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 ηs = 0.88. Heating value of fuel oil is 140,000 Btu/gal.
p. 582
Eliminate the line containing Q˙ output 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, cp .
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’.
6
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 m3 , not 0.21 m3 .
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.
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Index p. 739
Solar radiation, direct, shading of surfaces from, should refer to pages 392-96, not 292-96.
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