Thermal Environmental Engineering, 3rd. Ed.T. H. Kuehn, J. W. Ramsey and J. L. ThrelkeldPrentice-HallISBN 0-13-917220-3First 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 forNuL,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 thetube 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 to134a.

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

4 w5 =(1.20)(14.3)(144)(21.4)

(0.2)(778)20014.3

0.1667

−1

= 187.7 Btu/lbm

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

2

p. 178 Item number 3. Change the last portion to: ... and the temperature is 59 °F (101.325kPa, 15 °C).

p. 179 In the line “dry air”, omit the degree symbol before K.

In the line “water vapor”, Rv should be Rw and the degree symbol should be omittedon the next line before K.The equation for W should read: W =

mw

ma

.

p. 189 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 shsW

, not ShSW

.

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 readηw =W2 −W1

Ws* −W1

p. 228 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:

€

˙ m adWhf ,w

p. 270 Equation (10.19) should read:

€

−Δtw =˙ m a

˙ m wcw

Δh −ΔWhf ,W( )

p. 279 Equation (10.43) should read: NTU = − ln 1 − ε1 − εC

/(1 − C)

p. 280 The last two equations in the example should read:

NTU = − ln 1− 0.61 − 0.6(0.67)

/(1 − 0.67) = 1.22

€

V =NTU ˙ ′ m w

hD AV

=(1.22)(0.67)(746,000)

120= 5076 ft 3

3

The third line from the bottom of the example should read: This volume is 30 percentless 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 valueson the left should be multiplied by 4.186 to obtain the correct values for units ofkJ/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 correctequation should be:

tF,m = t −φ 1− UoAohiAP, i

t − tR( )

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/hEv 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:

to =1.056x75°F + 0.83x80°F

1.056 + 0.83= 77.2°F

p. 340 Example 12.3 Everywhere lbmv appears it should be replaced by lbmw

p. 341 Example 12.4 Everywhere lbmv 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 lbmv /lbma.

The last equation in Example 12.4 should read:latQ& =(2.38 lbma /hr)(0.0310-0.0092) lbmv /lbma(1038.2 Btu/lbmv) = 54.0 Btu/hr.

p. 344 In the equation for FP-1&2, the tangent functions(tan) should be replaced by inversetangent 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*Pw +c*.

4

p. 355 Table 12.5. The headings should be Pw, not Pv

The equation for W should beW = 0.6219Pw /(P − Pw ) .

p. 356 Figure 12.8. The labels on the abscissa(predicted mean vote) to the left of zeroshould be negative.

Ch. 13

p. 394 The last term in the equation for Fs should be:(a − b tanδ )(c − btanγ )

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 thesouth-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 withdiameter Ds = 1.39 x 106 km.”

Problem 13.10. The solar radiation units should be Btu/day ft2, 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 lasttwo columns on the right-hand side of the table, not to the column labeled “AverageEmittance”.

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 Repand 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 RepAt plane 5, ... -2.28 = 15.2 RepThe first sentence in the last paragraph should read: Therefore we would select avapor 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...

5

p. 469 Problem 14.20. The last paragraph of the problem statement should read: “Using anindoor design temperature of 70 °F and the 97.5 percent outdoor design temperaturefor 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 topart (f).

Ch. 15

p. 526 Problem 15.3. Add the following to the problem statement: The outdoor dry bulbtemperature 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 brickwalls with ti = 75 °F.

p. 527 Problem 15.13. The surface areas should be 300 ft2and 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 tencents per thousand Btu.

Ch. 16

p. 534 The last terms on the right-hand sides of equations (16.1) and (16.2) that are writtenin 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 amedium construction, an 8-in. uncovered concrete floor, and a very high aircirculation 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 loadper 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 temperatureis 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

6

p. 573 Example 17.4. The 4th sentence should read: The building is occupied Monday-Friday from 7 a.m. until 7 p.m.

p. 575 The last column of Table 17.4, Total Hrs Unoccupied, should be changed to thefollowing 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 I522 26 0 121515 102 0 471480 171 0 786477 249 0 1141516 359 0 1636510 446 0 2020498 498 1188 3415396 396 3784 5529289 289 4801 6053181 181 4264 5032102 102 3100 352261 61 2264 251040 40 1749 190516 16 804 86410 10 566 6024 4 252 2652 2 138 1451 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 thefurnace capacity is 130,000 Btu/hr with ηs = 0.88. Heating value of fuel oil is140,000 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 heatcapacity 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’.

7

p. 640 Figure 18.33. Add the following distances between points shown on the figure: 150ft. 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 wordround.

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 to3 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 to28.8.

p. 667 13th line from bottom. Head loss per unit length should be 3.2 ft water/100 ft, not3/2.

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 15mwater, how large a velocity can the pump have at the inlet if the static pressure at thesuction 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, not4.813.

8

Index

p. 739 Solar radiation, direct, shading of surfaces from, should refer to pages 392-96, not292-96.