fundamentals of heat and mass transfer solutions manual phần 6 docx

... 466 0s 1.29h7500Wπ××−=×==<Continued PROBLEM 8.28KNOWN: Inlet temperature, flow rate and properties of hot fluid. Initial temperature, volume and properties of pharmaceutical. Heat transfer ... 8.34KNOWN: Flow rate and inlet temperature of water passing through a tube of prescribed length,diameter and surface temperature.FIND: (a) Outlet water temperature and rate of heat transfer to water ... Temperature and velocity of water flowin pipe. Temperature and velocity of air in cross flow over pipe. Cost of producing hot water.FIND: Daily cost of heat loss per unit length of pipe.SCHEMATIC:ASSUMPTIONS:...

fundamentals of heat and mass transfer solutions manual phần 2 docx

... thickness and thermal conductivity of steel tubes. Temperature of steamflowing through the tubes. Thermal conductivity of insulation and emissivity of aluminum sheath.Temperature of ambient air and ... T(0).PROBLEM 3. 36 KNOWN: Temperature and volume of hot water heater. Nature of heater insulating material. Ambientair temperature and convection coefficient. Unit cost of electric power.FIND: Heater ... PROBLEM 3 .67 KNOWN: Spherical tank of 3-m diameter containing LP gas at -60 °C with 250 mm thickness of insulation having thermal conductivity of 0. 06 W/m⋅K. Ambient air temperature and convectioncoefficient...

fundamentals of heat and mass transfer solutions manual phần 4 docx

... 85 85 68 .8 52.5 203 85 76. 9 68 .8 44.4 204 20 76. 9 76. 9 60 .7 44.4 205 76. 9 68 .8 60 .7 40.4 20 6 30 68 .8 68 .8 54 .6 40.4 207 68 .8 61 .7 54 .6 37.3 208 40 61 .7 61 .7 49.5 37.3 209 45 61 .7 55 .6 49.5 ... 287 .6 305.8 315.2 321.5 323.5 324.5 325 325 6 108 285 .6 301 .6 313.5 319.3 322.7 324.0 324.5 325 7 1 26 281.8 299.5 310.5 317.9 321.4 323.3 324.2 8 144 279.8 2 96. 2 308 .6 315.8 320.4 322.5 9 162 ... 120 s) and T(0.15 m, 120s) using the finite-element software FEHTfor a surface emissivity of 0.94 and (b) Plot the temperature histories for x = 0, 150 and 60 0 mm, and explain key features of your...

fundamentals of heat and mass transfer solutions manual phần 3 pdf

... 100 100 -50 86. 0 105 .6 119 131.7 151 .6 20050 88.2 117.4 138.7 1 56. 1 174 .6 20050 99 .6 137.1 162 .5 179.2 190.8 20050 123.0 168 .9 194.9 207 .6 209.4 20050 173.4 220.7 240 .6 2 46. 8 239.0 200- ... the nodal temperatures (°C).Mesh ToT1T2T3T4Coarse 162 .5 118. 76 1 56. 25 168 . 76 2 06. 25Fine 162 .5 117.4 1 56. 1 168 .9 207 .6 The maximum difference for the interior points is 1.5°C (node ... To and T∞, the relative amounts of heat transfer to the air and heat sinkare determined by the values of h and t,cR.′′PROBLEM 4.54 (Cont.)The heat rate by convection between the bar and...

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fundamentals of heat and mass transfer solutions manual phần 5 ppsx

... R''tc0. 96 0.0 06 0. 066 0.0001375 6. 24 1.44 0.978 0.9814 9.4711 .64 8E4 0 *//* Correlation results and air thermophysical properties at TfNuLbarPr ReL Tf hLbar k nu uinf2294 0.7035 1 .63 E6 325 53.82 ... Diameter and length of a copper rod, with fixed end temperatures, inserted in an airstream of prescribed velocity and temperature.FIND: (a) Midplane temperature of rod, (b) Rate of heat transfer ... emissivity of Nichrome wire. Electricalcurrent. Temperature of air flow and surroundings. Velocity of air flow. (a) Surface and centerline temperatures of the wire, (b) Effect of flow velocity and...

fundamentals of heat and mass transfer solutions manual phần 7 pot

... %# %3233 62 62 59 8 0 0033 273 0151589 10 22 5 10308 10 and from Eq. 9.34,()()()221 /6 51 /6 s,iD,io8/27 8/279/ 16 9/ 16 i0.387 3.08 10 T T0.387Rak 0.0 263 h 0 .60 0 .60 D0.151 0.559 ... (a) Heat transfer rate by free convection to the room, per unit length of the tube; effect onquality, x, at outlet of 30 m length of tube; (b) Effect of radiation on heat transfer and quality of ... 9.8m s 1 65 0K 0.05mRa 2.51 10 6. 02 8.73 10 m sβαν∞−−== =×××The Churchill and Chu correlation yields()()()221 /6 51 /6 DD8/27 8/279/ 16 9/ 16 0.387 2.51 100.387RaNu 0 .60 0 .60 9.91...

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fundamentals of heat and mass transfer solutions manual phần 8 ppsx

... (kg/s) 60 62 64 66 68 70Exchanger length, L (m)PROBLEM 11.20KNOWN: Counterflow concentric tube heat exchanger.FIND: (a) Total heat transfer rate and outlet temperature of the water and (b) ... is() 66 hfgqmh1.5kg/s2.30410J/kg3. 461 0W==×=×& and the corresponding heat capacity rate for the water is() 6 cminc,oc,iCCq/TT3. 461 0W/40K 86, 400W/K.==−=×=Hence, ()( ) 6 minh,ic,iq/CTT3. 461 0W/ 86, 400W/K65K0 .62 .ε=−=×=Since ... developed; (c) Compute and plot the heat transfer rate, q, and fluid inlet temperatures, Th,o and Tc,o,as a function of the tube length for 60 ≤ L ≤ 400 m with the PF arrangement and overall coefficientUWmK=⋅2002!&,...

fundamentals of heat and mass transfer solutions manual phần 9 ppt

... ch=+=+−ερε ε 16 161 61 61(4) and Gw is equal to the blackbody emissive power at Tch. Using Eqs. (3) and (4) and substitutingnumerical values, findσεσ εσTT Tbp4ww4wch4=+−1 16 800 07 ... 0 .68 0µ−→=. Hence, ε = 0.3 × 0 .68 + 0.8(1 − 0 .68 ) = 0. 460 .For the maximum allowable value of Ts = 1800 K, it follows that84 84 84o0.391 5 .67 10 (2400) 0.8 5 .67 10 (300) 2 0. 46 ... history of theworkpiece from the start of heating to the end of cooling; identify key features of the process;determine the total time requirement; and justify the lumped-capacitance method of analysis.SCHEMATIC:ASSUMPTIONS:...

fundamentals of heat and mass transfer solutions manual phần 10 doc

... of heat transfer to tube without ash deposit, (b) Rate of heat transfer with an ash deposit of diameter Dd = 0. 06 m, (c) Effect of deposit diameter and convection coefficient on heat rate and contributions ... Do(m)050100150200 Heat rates (W/m)Radiation heat rate (W/m)Convection heat rate (W/m)Total heat rate (W/m)PROBLEM 13.107KNOWN: Thickness and height of a vertical air space. Emissivity and temperature of ... 0.333T 8 16 W / m .σ=− + =<PROBLEM 13.111KNOWN: Diameters and temperatures of a heated tube and a radiation shield.FIND: (a) Total heat loss per unit length of tube, (b) Effect of shield...

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