Fundamentals of Heat and Mass Transfer
7th Edition
ISBN: 9780470501979
Author: Frank P. Incropera, David P. DeWitt, Theodore L. Bergman, Adrienne S. Lavine
Publisher: Wiley, John & Sons, Incorporated
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 11, Problem 11.47P
a)
To determine
The outlet temperature in counter flow.
b.
To determine
The outlet temperature in parallel flow.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
the stack gas from a chemical operation contain vapors tha must be condensed by lowering its temperature from 315 to 35c. the gas flow rate is 0.70 m/sec. water is vailable at 10C and 1.26 kg/sec. A two shell and 4 pass tube counterflow heat exchange will be used with a water flowing through the tubes. the gas has aspecific heat of 1.10 kj/kg-k and a gas constant of 0.36 kj/kg-k. calculate the LMTD.
Saturated steam at 110°C is condensed in a shell-and-tube heat exchanger (1 shell pass; 2, 4, ⋯ tube passes) with a UA value of 2.5 kW/K. Cooling water enters at 40°C.
(a) Calculate the cooling water flow rate required to maintain a heat rate of 150 kW.
(b) Assuming that UA is independent of flow rate, calculate and plot the water flow rate required to provide heat rates over the range from 130 to 160 kW. Comment on the validity of your assumption.
Single-shell, two-tube pass heat exchanger with surface area 0.4 m? and
overall heat transfer coefficient of 1800 W/m2-K; saturated steam at 110°C
condenses on one side while water at a flow rate of 0.35 kg/s enters at 17°C.
Calculate (a) Outlet temperature of the water (b) Rate of condensation of steam.
cp(water)=4179 J/kg. K.
916 I
Thermodynamics
TABLE A-4
Saturated water-Temperature table
Internal energy,
Specific volume,
m/kg
Enthalpy.
KJ/kg
Entropy,
kJ/kg - K
k/kg
Sa.
Sat
Sat.
Sat.
Sat.
Sat.
Sat.
Sat.
liquid, Evap., vapor,
Sat.
Temp.,
liquid,
liquid,
Evap..
liquid,
Evap.,
press.
Pst kPa
vapor,
vapor,
vapor,
T°C
Up
he
0.001000
0.001000
0.000
21.019
42.020
2374.9
2374.9
0.001
21.020
42.022
0.0000 9.1556 9.1556
0.0763
0.1511 8.7488 8.8999
0.2245 8.5559 8.7803
0.2965 8.3696 8.6661
0.01
5
10
0.6117
0.8725
1.2281
206.00
147.03
106.32
2360.8
2346.6
2381.8
2388.7
2500.9
2489.1
2477.2
2500.9
2510.1
2519.2
8.9487 9.0249
15
20
0.001000
0.001001
2.3392 0.001002
2332.5
2318.4
2395.5
2402.3…
Chapter 11 Solutions
Fundamentals of Heat and Mass Transfer
Ch. 11 - In a fire-tube boiler, hot products of combustion...Ch. 11 - A shell-and-tube heat exchanger is to heat an...Ch. 11 - A steel tube (k=50W/mK) of inner and outer...Ch. 11 - A heat recovery device involves transferring...Ch. 11 - A novel design for a condenser consists of a tube...Ch. 11 - The condenser of a steam power plant...Ch. 11 - Thin-walled aluminum tubes of diameter D = 10mmare...Ch. 11 - A tinned-tube, cross-how heat exchanger is to use...Ch. 11 - Water at a rate of 45,500kg/h is heated from 80...Ch. 11 - A novel heat exchanger concept consists of a...
Ch. 11 - Prob. 11.12PCh. 11 - A process fluid having a specific heat of...Ch. 11 - A shell-and-tube exchanger (two shells, four tube...Ch. 11 - Consider the heat exchanger of Problem 11.14....Ch. 11 - The hot and cold inlet temperatures to a...Ch. 11 - A concentric tube heat exchanger of length L = 2 m...Ch. 11 - A counterflow, concentric tube heat exchanger is...Ch. 11 - Consider a concentric tube heat exchanger with an...Ch. 11 - A shell-and-tube heat exchanger must be designed...Ch. 11 - A concentric tube heat exchanger for cooling...Ch. 11 - A counterflow, concentric tube heat exchanger used...Ch. 11 - An automobile radiator may be viewed as a...Ch. 11 - Hot air for a large-scale drying operation is to...Ch. 11 - In a dairy operation, milk at a flow rate of 250...Ch. 11 - The compartment heater of an automobile...Ch. 11 - A counterflow, twin-tube heat exchanger is made...Ch. 11 - Consider a coupled shell-in-tube heat exchange...Ch. 11 - For health reasons, public spaces require the...Ch. 11 - A shell-and-tube heat exchanger (1 shell pass, 2...Ch. 11 - Saturated water vapor leaves a steam turbine at a...Ch. 11 - The human brain is especially sensitive to...Ch. 11 - Prob. 11.47PCh. 11 - A plate-tin heat exchanger is used to condense a...Ch. 11 - In a supercomputer, signal propagation delays...Ch. 11 - Untapped geothermal sites in the United States...Ch. 11 - A shell-and-tube heat exchanger consists of 135...Ch. 11 - An ocean thermal energy conversion system is...Ch. 11 - Prob. 11.55PCh. 11 - Prob. 11.56PCh. 11 - The chief engineer at a university that is...Ch. 11 - A shell-and-tube heat exchanger with one shell...Ch. 11 - Prob. 11.59PCh. 11 - Prob. 11.60PCh. 11 - Prob. 11.61PCh. 11 - Prob. 11.62PCh. 11 - A recuperator is a heat exchanger that heats air...Ch. 11 - Prob. 11.64PCh. 11 - Prob. 11.65PCh. 11 - A cross-flow heat exchanger consists of a bundle...Ch. 11 - Exhaust gas from a furnace is used to preheat the...Ch. 11 - Prob. 11.68PCh. 11 - A liquefied natural gas (LNG) regasification...Ch. 11 - Prob. 11.70PCh. 11 - A shell-and-tube heat exchanger consisting of...Ch. 11 - Prob. 11.73PCh. 11 - The power needed to overcome wind and friction...Ch. 11 - Prob. 11.75PCh. 11 - Consider a Rankine cycle with saturated steam...Ch. 11 - Consider the Rankine cycle of Problem 11.77,...Ch. 11 - Prob. 11.79PCh. 11 - Prob. 11.80PCh. 11 - Hot exhaust gases are used in a...Ch. 11 - Prob. 11.84PCh. 11 - Prob. 11.90PCh. 11 - Prob. 11S.1PCh. 11 - Prob. 11S.2PCh. 11 - Prob. 11S.3PCh. 11 - Solve Problem 11.15 using the LMTD method.Ch. 11 - Prob. 11S.5PCh. 11 - Prob. 11S.6PCh. 11 - Prob. 11S.8PCh. 11 - Prob. 11S.10PCh. 11 - Prob. 11S.11PCh. 11 - A cooling coil consists of a bank of aluminum...Ch. 11 - Prob. 11S.17P
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
- Water flowing in a long, aluminum lube is to be heated by air flowing perpendicular to the exterior of the tube. The ID of the tube is 1.85 cm, and its OD is 2.3 cm. The mass flow rate of the water through the tube is 0.65kg/s, and the temperature of the water in the lube averages 30C. The free-stream velocity and ambient temperature of the air are 10m/sand120C, respectively. Estimate the overall heat transfer coefficient for the heat exchanger using appropriate correlations from previous chapters. State all your assumptions.arrow_forwardMean Temperature Difference in an Exchanger. A 1-2 exchanger with one shell pass and two tube passes is used to heat a cold fluid from 37.8°C to 121.1°C by using a hot fluid entering at 315.6°C and leaving at 148.9°C. Calculate the ATm and the mean temperature difference AT in K. oala Ans. m ATim 148.9 K, ATm=131.8 K Inrner& Row, Publishers,arrow_forwardA single-shell, four-tube-pass heat exchanger is used to cool water flowing at 14 kg.s¹ entering at 18°C using ammonia with a mass flow rate of 18 kg.s¹ and an entry temperature and pressure of -12°C and 650 kPa, absolute, respectively. The heat exchanger is to use the ammonia in the liquid form, so no evaporation can be allowed. At 620 kPa, absolute pressure, ammonia evaporates at 10.5°C. The overall heat transfer coefficient of the heat exchanger is 568 W.m2 and the heat transfer surface area is 75 m². Determine the outlet temperatures of the hot and cold streams. Identify whether the heat exchanger, operating under the conditions shown, satisfies the rec irement that the ammonia remains liquid throughout the process. Sources for any researched material properties must be properly referencedarrow_forward
- You as a Biochemical Engineer in an ezyme industries is assigned to handle a counter flow double pipe heat exchanger with A,= 9 m2 which used for cooling a fermentation broth (c, = 3.15 kJ/kg. K) at a rate of 10 kg/s with an inlet temperature of 90°C. The water used as coolant enters the heat exchanger at a rate of 8 kg/s with an inlet temperature of 10°C. The plant data gave the following equation for the overall heat transfer coefficient (in W/m².K): 600 %3D 1 2 • U.8 |m. where m. and m, are the cold and hot stream flow rates in kg/s, respectively.arrow_forwardAn oil cooler is used to cool lubricating oil from 70oC to 40oC. The cooling water enters the heat exchanger at 15oC and leaves at 25oC. The specific heat capacities of the oil and water are 2000 and 4200 J/Kg.K respectively, and the oil flow rate is 4 Kg/s. Calculate the water flow rate required. Calculate the true mean temperature difference for (two-shell-pass / four-tube-pass) and (one-shell-pass / two-tube-pass) heat exchangers respectively. Find the effectiveness of the heat exchangers.arrow_forwardHot gas enters a finned-tube, crossflow heat exchanger at 300 °C and exits at 100 °C. Assume that both fluids are unmixed. The gas is used to heat pressurized water flowing at 1 kg/s from 35 °C to 125 °C. Assume constant properties and use 1000 J/kg K and 4197 J/kg K as the specific heat of the gas and the water, respectively. The overall heat transfer coefficient, based on the gas-side surface area is U₁ = 100 W/m² K. Please determine the required gas side surface area (Aʼn), using the NTU method. Repeat the problem using the LMTD method. Compare your results by quantifying the difference between the two methods with a percent difference and write an observation/conclusion for this result.arrow_forward
arrow_back_ios
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
How Shell and Tube Heat Exchangers Work (Engineering); Author: saVRee;https://www.youtube.com/watch?v=OyQ3SaU4KKU;License: Standard Youtube License