Archives: Solution Manual
Chapter 14 Mole fraction of NO at the catalytic surface
PROBLEM 14.31 KNOWN: Conditions of the exhaust gas passing over a catalytic surface for the removal of NO. FIND: (a) Mole fraction of NO at the catalytic surface, (b) NO removal rate. SCHEMATIC: ASSUMPTIONS: (1) Steady-state conditions, (2) One-dimensional species […]
Chapter 14 Uniform temperature and pressure throughout the column
PROBLEM 14.15 KNOWN: Column containing liquid phase of water (A) evaporates into the air (B) flowing over the mouth of the column. FIND: Evaporation rate of water (kg/h⋅m2) using the known value of the binary diffusion coefficient for the water […]
Chapter 14 Canceling terms and dividing numerator
PROBLEM 14.1 KNOWN: Mixture of O2 and N2 with partial pressures in the ratio 0.21 to 0.79. FIND: Mass fraction of each species in the mixture. SCHEMATIC: ASSUMPTIONS: (1) Ideal gas behavior. 2 O N2 p0.21 p 0.79 = ANALYSIS: […]
Chapter 13 Entering the energy balance into the IHT workspace
PROBLEM 13.91 (Cont.) where, assuming 47 L io 10 Ra 10 , h and h≤≤ are given by Eqs. 9.52 and 9.26, respectively, g T 825 K= < The corresponding value of qh is h q 108 kW= < where […]
Chapter 13 Negligible convection in region between shield and wall
PROBLEM 13.85 KNOWN: Dimensions and inclination angle of a flat–plate solar collector. Absorber and cover plate temperatures and emissivities. FIND: (a) Rate of heat transfer by free convection and radiation, (b) Effect of the absorber plate temperature on the heat […]
Chapter 13 Switching the gas from air to argon reduces the heat
PROBLEM 13.75 KNOWN: Emissivity of glass sheets. Inside and outside temperatures and convection heat transfer coefficients. Type of gas within gap. FIND: Heat flux through the window for case 1: ε 1 = ε 2 = 0.95, case 2: ε […]
Chapter 13 Which Indicates The Plate Temperature Increasing
PROBLEM 13.66 KNOWN: Four surface enclosure with all sides of equal area; temperatures of three surfaces are specified while the fourth is re-radiating. FIND: Temperature of the re–radiating surface A4. SCHEMATIC: ANALYSIS: To determine the temperature of the re–radiating surface […]
Chapter 13 Furnace power requirement and temperature of a heated
PROBLEM 13.56 KNOWN: Dimensions, surface radiative properties, and operating conditions of an electrical furnace. FIND: (a) Equivalent radiation circuit, (b) Furnace power requirement and temperature of a heated plate. SCHEMATIC: ANALYSIS: (a) Since there is symmetry about the plate, only […]
Chapter 13 Radiation transfer rate for black surfaces
PROBLEM 13.42 KNOWN: Emissivities, diameters and temperatures of concentric spheres. FIND: (a) Radiation transfer rate for black surfaces. (b) Radiation transfer rate for diffuse–gray surfaces, (c) Effects of increasing the diameter and assuming blackbody behavior for the outer sphere. (d) […]
Chapter 13 Plates are sufficiently large to form a two
PROBLEM 13.30 (Cont.) (a) For α = 0, 11 13a 1 a (b a) F tan tan 2x x −− −− = − π For F13c we note that […]
Chapter 13 Irradiation Considering Radiation From The Cover And
PROBLEM 13.13 KNOWN: Heat flux gage positioned normal to a blackbody furnace. Cover of furnace is at 350 K while surroundings are at 300 K. FIND: (a) Irradiation on gage, Gg, considering only emission from the furnace aperture and (b) […]
Chapter 13 The two disk-shaped ends of the tube become small
PROBLEM 13.1 KNOWN: Various geometric shapes involving two areas A1 and A2. FIND: Shape factors, F12 and F21, for each configuration. SCHEMATIC: ASSUMPTIONS: (1) Surfaces are diffuse, (2) Length normal to the page is large compared to other dimensions. ANALYSIS: […]
Chapter 12 Schematic Assumptions 1 Plate Opaque Diffuse And
PROBLEM 12.95 KNOWN: Plate temperature and spectral and directional dependence of its absorptivity. Direction and magnitude of solar flux. FIND: (a) Expression for total absorptivity, (b) Expression for total emissivity, (c) Net radiant flux, (d) Effect of cut-off wavelength associated […]
Chapter 12 Spectral distributions of earth and solar emission
PROBLEM 12.83 KNOWN: Spectral distribution of coating on satellite surface. Irradiation from earth and sun. FIND: (a) Steady–state temperature of satellite on dark side of earth, (b) Steady–state temperature on bright side. SCHEMATIC: ASSUMPTIONS: (1) Steady-state conditions, (2) Opaque, diffuse-gray […]
Chapter 12 Solar irradiation and associated blackbody temperature.
PROBLEM 12.73 (Cont.) ( ) 2 i 3 dT 4 W 15.4 1500 300 K kg J dt mK 8933 385 0.01m kg K m = − ⋅ ⋅ (c) Using the IHT […]
Chapter 12 The cylinder temperature exceeds the air temperature
PROBLEM 12.61 KNOWN: Cross flow of air over a cylinder placed within a large furnace. FIND: (a) Steady–state temperature of the cylinder when it is diffuse and gray with e = 0.5, (b) Steady- state temperature when surface has spectral […]
Chapter 12 When performing an analysis with both convection
PROBLEM 12.46 KNOWN: Plate exposed to solar flux with prescribed solar absorptivity and emissivity; convection and surrounding conditions also prescribed. FIND: Steady–state temperature of the plate, convection and radiation fluxes at plate surface. SCHEMATIC: ASSUMPTIONS: (1) Steady-state conditions, (2) Plate […]
Chapter 12 The rim would appear brighter than the central region
PROBLEM 12.31 KNOWN: Incandescent sphere suspended in air within a darkened room exhibiting these characteristics: initially: brighter around the rim after some time: brighter in the center FIND: Plausible explanation for these observations. ASSUMPTIONS: (1) The sphere is at a […]
Chapter 12 Because the titanium has an emissivity that increases
PROBLEM 12.17 KNOWN: Isothermal enclosure of surface area, As, and small opening, Ao, through which 52W emerges. FIND: (a) Temperature of the interior enclosure wall if the surface is black, (b) Temperature of the wall surface having ε = 0.15. […]
Chapter 12 Opaque surface at steady-state temperature of
PROBLEM 12.1 KNOWN: Opaque, horizontal plate, well insulated on backside, is subjected to a prescribed irradiation. Also known are the reflected irradiation, emissive power, plate temperature and convection coefficient for known air temperature. FIND: (a) Emissivity, absorptivity and radiosity and […]
Chapter 11 A model was developed using the effectiveness
PROBLEM 11S.6 KNOWN: Single pass, cross–flow heat exchanger with hot exhaust gases (mixed) to heat water (unmixed) FIND: Required surface area. SCHEMATIC: ASSUMPTIONS: (1) Negligible heat loss to surroundings, (2) Negligible kinetic and potential energy changes, (3) Exhaust gas properties […]
Chapter 11 Without accounting for the increase in the air
PROBLEM 11.68 (Cont.) [ ] 2 2 ,/( ) 0.003 m /(180 W/m K 0.02 m ) 0.042 K/W t b b hs R L kW= = ⋅× = min 3 ( )( 1) 8.89 m/s 0.015 m 0.0018 m […]
Chapter 11 Our design process will involve the following steps
PROBLEM 11.58 KNOWN: Rankine cycle with saturated steam leaving the boiler at 2 MPa and a condenser pressure of 10 kPa. Net reversible work of 0.5 MW. FIND: (a) Thermal efficiency of ideal Rankine cycle, (b) Required cooling water flow […]
Chapter 11 Oil cooling process approximates constant wall
PROBLEM 11.46 KNOWN: Engine oil cooled by air in a cross-flow heat exchanger with both fluids unmixed. FIND: (a) Heat transfer coefficient on oil side of exchanger assuming fully-developed conditions and constant wall heat flux, (b) Effectiveness, and (c) Outlet […]
Chapter 11 Negligible Sensible Energy Change Phase Change Material
PROBLEM 11.33 (Cont.) Hence, 1 11 2 o i U h h 2003 W / m K − −− =+= ⋅ (b) If the tube-side convection coefficient is doubled, 2 i h 5008 W / m K= […]
Chapter 11 The UA product required for the chilling process
PROBLEM 11.23 KNOWN: Cooling milk from a dairy operation to a safe-to–store temperature, Th,o ≤ 13°C, using ground water in a counterflow concentric tube heat exchanger with a 50-mm diameter inner pipe and overall heat transfer coefficient of 1000 W/m2⋅K. […]
Chapter 11 Geometry and operating conditions of tube bank
PROBLEM 11.13 KNOWN: The shell and tube Hxer (two shells, four tube passes) of Problem 11.12, known to have an area 4.75m2, provides 95°C water at the cold outlet (rather than 120°C) after several years of operation. Flow rates and […]
Chapter 11 Overall coefficient based upon the outer surface
PROBLEM 11.1 KNOWN: Overall heat transfer coefficient of clean boiler. Rate at which fouling factors on inner and outer tube surfaces increase with time. Percent reduction in overall heat transfer coefficient that corresponds to need for cleaning. FIND: Time after […]
Chapter 10 Film condensation occurs in condensation section
ROBLEM 10.54 KNOWN: Thin-walled thermosyphon. Absorbs heat by boiling saturated water at atmospheric pressure on boiling section Lb. Rejects heat by condensing vapor into a thick film which falls length of condensation section Lc back into boiling section. FIND: (a) […]
Chapter 10 Substituting numerical values with the limits
PROBLEM 10.47 (Cont.) Substitute Eq. (3) into Eq. (1) for D h and recognize 32 ss 1 V / A D / D D / 6, 6 ππ = = o where the limits of integration have been identified, with […]
Chapter 10 Whether flow regime would stay the same
PROBLEM 10.35 KNOWN: Vertical tube experiencing condensation of steam on its outer surface. FIND: Heat transfer and condensation rates. SCHEMATIC: ASSUMPTIONS: (1) Film condensation, (2) Negligible non-condensibles, (3) D/2 >> δ, vertical plate behavior. PROPERTIES: Table A-6, Water, vapor (1.0133 […]
Chapter 10 The two operating conditions are shown on the boiling curve
PROBLEM 10.24 (Cont.) () ( ) 44 s sat rad s sat TT hTT εσ − =− () ( ) 4 44 2 rad 0.25 623 373 K h 7.4 W / m K 350 100 K − = = […]
Chapter 10 The power requirement for boiling and the evaporation rate are
PROBLEM 10.13 KNOWN: Saturated ethylene glycol at 1 atm heated by a chromium-plated heater of 200 mm diameter and maintained at 480K. FIND: Heater power, rate of evaporation, and ratio of required power to maximum power for critical heat flux. […]
Chapter 10 The Jakob number can be based on the liquid or vapor specific
PROBLEM 10.1 KNOWN: Water at 1 atm with Ts – Tsat = 8°C. FIND: Show that the Jakob number is much less than unity; what is the physical significance of the result; does result apply to ethylene glycol? PROPERTIES: Table […]
Chapter 9 The Churchill and Chu correlation yields
PROBLEM 9.88 KNOWN: Plate dimensions and initial temperature. Velocity and temperature of air in parallel flow over plates. FIND: Initial rate of heat transfer from plate. Initial rate of change of plate temperature. Graph of the free, forced and mixed […]
Chapter 9 Depending on the desired accuracy of the solution
PROBLEM 9.82 KNOWN: Diameter and temperature of cylinder. Velocity and temperature of fluid in cross flow. Four different fluids. FIND: Whether heat transfer by free convection is significant. SCHEMATIC: ASSUMPTIONS: (1) Steady state, (2) Constant properties, (3) Air can be […]
Chapter 9 The Minimum Heat Transfer Rate Corresponds The
PROBLEM 9.71 (Cont.) (b) The unit conduction resistance of a glass pane is 2 cond p p R L / k 0.00429 m K / W, ′′ = = ⋅ and the smallest convection resistance is ( ) conv,o o […]
Chapter 9 Heat Loss Also Associated With Radiation Exchange
PROBLEM 9.57 (Cont.) (d) From hydrostatic considerations and the assumption of a constant density ρm, the balance between the gravitational and net pressure forces may be expressed as dp/dz = –ρm(g/gc). The momentum equation is then of the form or, […]
Chapter 9 Horizontal pipe with aluminum foil having emissivity
PROBLEM 9.48 KNOWN: Insulated, horizontal pipe with aluminum foil having emissivity which varies from 0.12 to 0.36 during service. Pipe diameter is 300 mm and its surface temperature is 90°C. FIND: Effect of emissivity degradation on heat loss with ambient […]
Chapter 9 The rate of heat loss per unit length for a calm day
PROBLEM 9.40 KNOWN: Diameter and emissivity of horizontal glass cylinder. Temperature of air and surroundings. FIND: Temperature at which lumped capacitance approximation may be applied. SCHEMATIC: ASSUMPTIONS: (1) The quasi-steady approximation holds: the heat transfer coefficient can be evaluated based […]
Communications Chapter 8 Homework Films That Could Discussed Include Revenge The
Typically, a professional poster involves showing one’s work to numerous audiences at a conference or seminar. As viewers walk by, the poster should quickly and efficiently communicate the research. Unlike the formality and fast pace of a slide show or […]
Chapter 9 where h is estimated from the appropriate correlation
PROBLEM 9.28 KNOWN: Electric heater at bottom of tank of 500 mm diameter maintains surface at 65°C with engine oil at 10°C. FIND: Power required to maintain 65°C surface temperature. SCHEMATIC: T ∞ = 10° C ASSUMPTIONS: (1) Oil is […]
Communications Chapter 8 Homework Jackson Al Take Note When Terms Were
3. Lead a class discussion about the role of technology, specifically branded technology, on our lives. How does Google change the way we learn, study, and interact with the world? What about the issues of equality of access. Privatization and […]
Chapter 9 The Outside Convection Coefficient May Obtained First
PROBLEM 9.17 KNOWN: Room and ambient air conditions for window glass. Thickness and thermal conductivity of glass. FIND: Inner and outer surface temperatures and rate of heat loss. SCHEMATIC: ASSUMPTIONS: (1) Steady-state conditions, (2) One-dimensional conduction in the glass, (3) […]
Communications Chapter 7 Homework What material from this course has made an impact?
cell phone, etc.) and (2) reflect upon it in relation to the concepts and principles from readings and discussions. Remind students that it is vital that they apply course concepts to their media use. At the conclusion of the journal, […]
Chapter 8 Homework Constant properties and steady-state conditions
PROBLEM 8.91 KNOWN: Diameters and length of three microchannels machined in a copper block. Inlet temperature of water flowing through the channels, copper block temperature, pressure difference from inlet to outlet of the channels. FIND: (a) Mass flow rate and […]
Communications Chapter 7 Homework This activity calls on students to view the manufactured
3. Lead a class discussion about images of class in television and films. How do these images and portrayals connect with gendered and racial identities? What classed representations are prevalent on reality shows? Yousman, Gender, Race, and Class in Media […]
Chapter 8 Homework However All Such Fluids Such Air Are
PROBLEM 8.81 KNOWN: Inlet temperatures and flow rates of a pharmaceutical product and pressurized water, tube diameter, coil diameter and number of coils. FIND: (a) The outlet temperature of the pharmaceutical product, (b) The variation of the pharmaceutical outlet temperature […]
Communications Chapter 6 Homework Have students conduct a mini-survey of their friends, family
peers to see how their own community’s TV viewing compares to the national averages. Refer to https://www.nielsen.com/us/en/solutions/measurement/television/. from one’s own experience, observation, from the arts, the media, or one’s imagination. Make clear to students the importance of defining terms, concepts, […]
Chapter 8 Homework A concentric tube arrangement for removing heat generated from a biochemical
PROBLEM 8.72 KNOWN: Inner and outer tube surface conditions for an annulus. FIND: (a) Velocity profile, (b) Temperature profile and expression for inner surface Nusselt number. SCHEMATIC: ASSUMPTIONS: (1) Steady-state conditions, (2) Laminar, fully developed flow, (3) Uniform heat flux […]