Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470917855
Author: Bergman, Theodore L./
Publisher: John Wiley & Sons Inc
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 8, Problem 8.48P
Consider pressurized liquid water flowing at
(a) If the water enters at
(b) If the water enters at
(c) If the water enters at
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
A liquid metal flows at a mass rate of 3 kg/s through a constant heat flux 5-cm-i.d tube in a nuclear reactor. The fluid at 473 K is to be heated with the tube wall 30 K above the fluid temperature. Determine the length of the tube required for a 1-K rise in bulk fluid temperature, using the following properties: p = 7.7 x 10^3 kg/m^3v = 8.0 x 10^-8 m^2/sCp = 130 J/(kg K)k = 12 W/mKPr = 0.011
Kaufman's correlation: Nu = 0,625.(Re.Pr)0,4
Oil whose temperature is constant at 20 ° C (ρ = 886 kg / m3, μ = 0.805 kg / m / s) It flows continuously and fully developed from its length. The pressure at the entrance of this 40 m length is 720 kPa, pressure at its outlet is measured as 101 kPa. Flow is laminar. Volume flow rates, average velocities, Reynolds numbers and Darcy friction factors
a-That the pipe is horizontal
b-The pipe makes 20 ° counterclockwise with the horizontal
c-The pipe makes 15 ° clockwise with the horizontal. Calculate for situations.
Q2. Water is heated while following through a 1.5cmx 3.5cm rectangular cross section
tube at a velocity of 1.2 m/s. The entering temperature of the water is 40°C and the tube
wall is maintained at 85 C. Determine the length of the tube required to raise the
temperature of water to 70 C. If the pressure loss in the tube is registered to be 10KPa.
find the required pumping power.
The properties of water are: p=985.5 kg/m², C- 4.18kJ/Kg. v-0.517x10 m/s, k-0.654
W/mK and Pr-3.26.
Nu =0.023Re** Pr
Chapter 8 Solutions
Fundamentals of Heat and Mass Transfer
Ch. 8 - Fully developed conditions are known to exist for...Ch. 8 - What is the pressure drop associated with water at...Ch. 8 - Water at 27C flows with a mean velocity of 1 m/s...Ch. 8 - An engine oil cooler consists of a bundle of 25...Ch. 8 - For fully developed laminar flow through a...Ch. 8 - Consider pressurized water, engine oil (unused),...Ch. 8 - Velocity and temperature profiles for laminar flow...Ch. 8 - At a particular axial station, velocity and...Ch. 8 - In Chapter 1, it was stated that for...Ch. 8 - When viscous dissipation is included. Equation...
Ch. 8 - Consider a circular tube of diameter D and length...Ch. 8 - Consider flow in a circular tube. Within the test...Ch. 8 - Consider a cylindrical nuclear fuel rod of length...Ch. 8 - Consider the laminar thermal boundary layer...Ch. 8 - In a particular application involving fluid flow...Ch. 8 - A flat-plate solar collector is used w heat...Ch. 8 - Atmospheric air enters the heated section of a...Ch. 8 - Fluid enters a tube with a flow rate of 0.015kg/s...Ch. 8 - Water at 300 K and a flow rate of 5kg/s enters a...Ch. 8 - Slug flow is an idealized tube flow condition for...Ch. 8 - Superimposing a control volume that is...Ch. 8 - An experimental nuclear core simulation apparatus...Ch. 8 - Water at 20°C and a flow rate of 0.1kg/s enters a...Ch. 8 - Engine oil is heated by flowing through a circular...Ch. 8 - Engine oil flows through a 25mm -diameter tube at...Ch. 8 - In the final stages of production, a...Ch. 8 - An oil preheater consists of a single tube of 10mm...Ch. 8 - Engine oil flows at a rate of 1kg/s through a 5mm...Ch. 8 - Air at p=1atm enters a thin-walled ( D=5-mm...Ch. 8 - To cool a summer home without using a vapor...Ch. 8 - Batch processes are often used in chemical and...Ch. 8 - The evaporator section of a heat pump is installed...Ch. 8 - Water flowing at 2kg/s through a 40mm diameter...Ch. 8 - Consider the conditions associated with the hot...Ch. 8 - A thick-walled, stainless steel (AISI 316) pipe of...Ch. 8 - An air heater for an industrial application...Ch. 8 - Consider fully developed conditions in a circular...Ch. 8 - Consider the encased pipe of Problem 4.29, but now...Ch. 8 - Water flows through a thick-wailed tube with an...Ch. 8 - Atmospheric air enters a 10m -long. 150mm...Ch. 8 - NaK (45%/55). which is an alloy of sodium and...Ch. 8 - The products of combustion from a burner are...Ch. 8 - Liquid mercury at 0.5kg/s is lo be heated from 300...Ch. 8 - The surface of a 50-mm-diameter. thin-walled tube...Ch. 8 - Consider a horizontal, thin-walled circular tube...Ch. 8 - Consider pressurized liquid water flowing at...Ch. 8 - Cooling water flows through the 25.4-mm -diameter...Ch. 8 - The air passage for cooling a gas turbine vane can...Ch. 8 - The core of a high-temperature, gas-cooled nuclear...Ch. 8 - Air at 200kPa enters a 2-m -long, thin-walled tube...Ch. 8 - Heated air required for a food-drying process is...Ch. 8 - Consider laminar flow of a fluid with Pr=4 that...Ch. 8 - A common procedure for cooling a high-performance...Ch. 8 - One way to cool chips mounted on the circuit...Ch. 8 - Refrigerant- 134a is being transported a 0.1 kg/s...Ch. 8 - Oil at 150°C flows slowly through a long,...Ch. 8 - Exhaust gases from a wire processing oven are...Ch. 8 - A hot fluid passes through a thin-walled tube of...Ch. 8 - Consider a thin-walled tube of 10mm diameter and...Ch. 8 - Water at a flow rate of m =0.215kg/s is cooled...Ch. 8 - To maintain pump power requirements per unit flow...Ch. 8 - Consider a thin-walled, metallic tube of length...Ch. 8 - A circular tube of diameter D=0.2mm and length...Ch. 8 - Repeat Problem 8.66 for a circular tube of...Ch. 8 - Heat is to be removed from a reaction vessel...Ch. 8 - A healing contractor must heat 0.2kg/s of water...Ch. 8 - A thin-walled tube with a diameter of 6 mm and...Ch. 8 - A 50mm -diameter, thin—walled metal pipe covered...Ch. 8 - A thin-walled, uninsulated 0.3m -diameter duct is...Ch. 8 - Pressurized water at Tm,i=200C is pumped at...Ch. 8 - Water at 290K and 0.2kg/s flows through a Teflon...Ch. 8 - The temperature of flue gases flowing through the...Ch. 8 - In a biomedical supplies manufacturing process, a...Ch. 8 - Consider the ground source heat pump of Problem...Ch. 8 - For a sharp-edged inlet and a combined entry...Ch. 8 - Fluid enters a thin-walled rube of 5-mni diameter...Ch. 8 - Air at 3104kg/s and 27C enters a rectangular duct...Ch. 8 - Air at 25C flows at 30106kg/s within 100mm -long...Ch. 8 - A cold plate is an active cooling device that is...Ch. 8 - The cold plate design of Problem 8.82 has not been...Ch. 8 - A device that recovers heat from high-temperature...Ch. 8 - Air at 1 atm and 285K enters a 2-m -long...Ch. 8 - A double-wall heat exchanger is used to transfer...Ch. 8 - Consider laminar, fully developed flow in a...Ch. 8 - You have been asked to perform a feasibility study...Ch. 8 - A coolant flows through a rectangular channel...Ch. 8 - An electronic circuit board dissipating 50W is...Ch. 8 - To slow down large prime movers like locomotives,...Ch. 8 - A printed circuit board (PCB) is cooled by...Ch. 8 - Water at m=0.02kg/s and Tm,i=20C enters an annular...Ch. 8 - tFor the conditions of Problem 8.93, how tong must...Ch. 8 - Referring 10 Figure 8.11, consider conditions in...Ch. 8 - Consider the air healer of Problem 8.38, but now...Ch. 8 - Consider a concentric tube annulus for which the...Ch. 8 - It is common practice (o recover waste heat from...Ch. 8 - A concentric lube arrangement, for which the inner...Ch. 8 - Consider sterilization of the pharmaceutical...Ch. 8 - An engineer proposes to insert a solid rod of...Ch. 8 - An electrical power transformer of diameter 230mm...Ch. 8 - A bayonet cooler is used to reduce the temperature...Ch. 8 - The mold used in an injection molding process...Ch. 8 - Prob. 8.107PCh. 8 - Prob. 8.108PCh. 8 - Consider the microchannel cooling arrangement...Ch. 8 - The onset of turbulence in a gas flowing within a...Ch. 8 - Due to its comparatively large thermal...Ch. 8 - A novel scheme for dissipating heat from the chips...Ch. 8 - An experiment is designed to study microscale...Ch. 8 - Determine the tube diameter that corresponds to a...Ch. 8 - An experiment is devised to measure liquid flow...Ch. 8 - In the processing of very long plastic tubes of...Ch. 8 - Air at 300K and a flow rate of 3kg/h passes upward...Ch. 8 - What is the convection mass transfer coefficient...Ch. 8 - Air flowing through a tube of 75mm diameter passes...Ch. 8 - Consider gas flow of mass density and rate m...Ch. 8 - Atmospheric air at 25C and 3104kg/s flows through...Ch. 8 - Air at 25C and 1atm is in fully developed flow at...Ch. 8 - A humidifier consists of a bundle of vertical...Ch. 8 - The final step of a manufacturing process in which...Ch. 8 - Dry air is inhaled at a rate of lo liter/win...Ch. 8 - A mass transfer Operation is preceded by laminar...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
The force in members BC, CF, and FE of the truss and the state of members are in tension or compression.
Engineering Mechanics: Statics & Dynamics (14th Edition)
The value of ∂T/∂y and ∂T/∂x at surface B.
Introduction to Heat Transfer
Determine the resultant internal loadings acting on the cross sections at points F and G of the frame. Probs. 7...
Statics and Mechanics of Materials (5th Edition)
Identify the zero-force members in each truss. Prob. P6-2
INTERNATIONAL EDITION---Engineering Mechanics: Statics, 14th edition (SI unit)
What parts are included in the vehicle chassis?
Automotive Technology: Principles, Diagnosis, and Service (5th Edition)
You are asked to size a pump for installation in the water supply system of the Willis Tower (formerly the Sear...
Fox and McDonald's Introduction to Fluid Mechanics
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Q=2000J Tout=? V(m/s) D=0.1m air Air at (2.95x10^2) K is entering in a circular pipe at 101325 Pa as shown in Figure. The velocity of the air at the pipe entrance is (1.5000x10^0) m/s. The diameter of the pipe is 0.1m. Specific gas constant of air is 287 J/kg-K. Specific heat of air is 100O J/kg-K. Find the outlet temperature if 2000 J of heat is added to the pipe. Answer should be in 'K' with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: Activate Windows Go to Settings to activat (? 9°C ENG 2020arrow_forwardIt is observed that water at 20°C rises up to 20 m height in a tree due to capillary effect. The surface tension of water at 20°C is ?s = 0.073 N/m and the contact angle is 20°. The maximum diameter of the tube in which water rises is (a) 0.035 mm (b) 0.016 mm (c) 0.02 mm (d) 0.002 mm (e) 0.0014 mmarrow_forwardQ=2000J Tout=? V(m/s) D=0.1m air Air at (2.95x10^2) K is entering in a circular pipe at 101325 Pa as shown in Figure. The velocity of the air at the pipe entrance is (1.000x10^0) m/s. The diameter of the pipe is 0.1m. Specific gas constant of air is 287 J/kg-K. Specific heat of air is 1000 J/kg-K. Find the outlet temperature if 2000 J of heat is added to the pipe. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answerarrow_forward
- Q=2000J Tout=? V(m/s) D=0.1m air Air at (3.050x10^2) K is entering in a circular pipe at 101325 Pa as shown in Figure. The velocity of the air at the pipe entrance is (1.50x10^0) m/s. The diameter of the pipe is 0.1m. Specific gas constant of air is 287 J/kg-K. Specific heat of air is 1000 J/kg-K. Find the outlet temperature if 2000 J of heat is added to the pipe. Answer should be in 'K' with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer DELLarrow_forwardA liquid metal flows at the rate of 4kg/s through a constant heat flux 6cm inner diameter tube in a nuclear reactor. The fluid at 200 oC is to be heated with the tube wall 40 oC above the fluid temperature. Determine the length of the tube required 25 oC rise in bulk fluid temperature. Using the following properties: ρ = 7700 kg/m3 , Y = 8*10-8 m2/s , Pr=0.011 , Cp= 130 J/kg.K , k=12W/mk. please can you solve it with keyboard,take your time heat transfer, J.P.Holman .arrow_forwardo106 ma Q4) Water at the rate of 0.6 kg/s is forced through a smooth (3cm)-ID tube 16 m long.The inlet water temperature is 10 C, and the tube wall temperature is 15 C higher than the water temperature all along the length of the tube. What is the exit water temperature. k= 0.585, Pr= 9.4, µ= 1.31x10°,p= 992kg/m’, CP= 4195 j/kg. aarrow_forward
- 1) Air flows steadily between two cross sections in a long straight section of 0.1-m inside diameter pipe. The static temperature and pressure at each section are indicated in Figure. If the average air velocity at section (1) is 205 m/s, determine the average air velocity at section (2). D= 0.1 m iwe m e Section (1) Section (2) P = 77 kPa (abs) T= 268 K = 205 m/s P2 = 45 kPa (abs) T2 = 240 Karrow_forwardA 1.0 m radius cylindrical industrial tank filled with viscous oil to a level at a height h from its base, must be drained through a tube with a radius of 0.2 m and length L, connected to its base. The speed profile of oil in the drain tube can be described by the equation below. Where v is the oil speed, vmax is a = maximum oil speed, r is the radius, and R is the tube radius. Considering this problem situation, do what is asked in the following items, justifying your answers. a) What is the volume, in liters, of oil removed from the tank after 10 seconds, if the maximum discharge speed does the oil reach 0.35 m/s? Data: π ≈ 22/7; 1 m3 = 1000 L. b) What flow regime does the system operate? Demonstrate. Data: specific mass of oil = 800 kg/m3, specific mass of water = 1000 kg/m3, oil viscosity = 0.056 Pa.s e viscosity of water = 0.001 Pa.s.arrow_forward6 m 6 m Elbow 6 m 3 m. Activate Wind Goto Sectines1 15 m A fluid is pumped at a rate of 0.00156 m/s through a 0.025-m-diameter pipe to fill a 9°C 020arrow_forward
- Tout=? V (m/s) D=0.1m air Air at (3.10x10^2) K is entering in a circular pipe at 101325 Pa as shown in Figure. The velocity of the air at the pipe entrance is (1.0000x10^O) m/s. The diameter of the pipe is 0.1m. Specific gas constant of air is 287 J/kg-K. Specific heat of air is 1000 J/kg-K. Find the outlet temperature if 2000 J of heat is added to the pipe. Answer should be in 'K' with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible.arrow_forwardA liquid while flowing through a thin-walled cylindrical copper pipe (D=10 cm, L=1 m) with a mass flow rate of 0.001 kg/s is heated from Ti= 33 °C to Te= 98 °C by supplying constant surface heat flux to the pipe surface (all the heat is transferred to the fluid). Considering fully developed laminar flow in the pipe, what is the surface temperature of the pipe at the exit in Celsius? (For the fluid use, Cp 1800 J/kg.K, k= 0.2 W/m.K) = constant 117111 q's m = 0.001 kg/s 111 L=1m D= 10 cmarrow_forwardWater is being pumped the through one inch diameter piping arrangement to a higher elevation (5 meters up). Assume incompressible fluid conditions and some heat losses to the surroundings. At the inlet water pressure is 1 bar, temperature 15C, and volumetric flow rate is 0.02 m3/s. At the exit pressure is 2.2 bar, temperature is 10C and velocity of the stream is 40 m/s. Determine: a.Density of the inlet stream using NIST tables. b.Mass flow rate [kg/s] c.Determine h2 from known p2 and T2 using NIST tables d.Find heat rate removed from Q=m(h1-h2) Use Energy Balance Equation with enthalpy difference and in the units of kW to find pumping power in kW. NOTE: The heat is removed from the system, so it should be negative in your equation!arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning
Principles of Heat Transfer (Activate Learning wi...
Mechanical Engineering
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Cengage Learning
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license