HEAT+MASS TRANSFER:FUND.+APPL.
6th Edition
ISBN: 9780073398198
Author: CENGEL
Publisher: RENT MCG
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 4, Problem 139P
Chickens with an average mass of 2.2 kg and average specific heat of 3.54 kJ/kg°C are to be cooled by chilled water that enters a continuous-flow-type inunersion chiller at 0.5°C. Chickens are dropped into the chiller at a uniform temperature of 15°C at a rate of 500 chickens per hour and are cooled to an average temperature of 3°C before they are taken out. The chiller gains heat from the surroundings at a rate of 210 kJ/min. Determine (a) the rate of heat removal from the chicken, in kW, and (b) the mass flow rate of water, in kg/s, if the temperature rise of water is not to exceed 2°C.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Air at a dry bulb temperature of 40℃ and a wet bulb temperature of 20℃ is first heated in a heater to a dry bulb temperature of 90℃. Then it is passed through a bed of apricot slices to dry them. The air exiting from the top of the apricot bed is at a dry bulb temperature of 60℃. Clearly show the various paths of the process on a psychrometric chart! Determine the amount of moisture removed, in grams of water/second from the apricot bed!
A natural-draft cooling tower is to remove 70 MW of waste heat from the cooling water that
enters the tower at 42°C and leaves at 30°C. Atmospheric air enters the tower at 1 atm with
dry- and wet-bulb temperatures of 23 and 16°C, respectively, and leaves saturated at 32°C.
Determine (a) the mass flow rate of the cooling water, (b) the volume flow rate of air into the
cooling tower, and (c) the mass flow rate of the required makeup water.
A natural-draft cooling tower is to remove 50 MW of waste heat from the cooling water that enters the tower at 42°C and leaves at 27°C. Atmospheric air enters the tower at 1 atm with dry- and wet-bulb temperatures of 23 and 18°C, respectively, and leaves saturated at 37°C. Determine:
(a)the mass flow rate of the cooling water,
(b)the volume flow rate of air into the cooling tower, and
(c)the mass flow rate of the required makeup water.
Answers: (a) 768.1 kg/s, (b) 463.1 m3/s, (c) 16.4 kg/s
Chapter 4 Solutions
HEAT+MASS TRANSFER:FUND.+APPL.
Ch. 4 - What is the physical significance of the Biot...Ch. 4 - What is lumped system analysis? When is it...Ch. 4 - In what medium is the lumped system analysis more...Ch. 4 - For which solid is the lumped system analysis more...Ch. 4 - For which kinds of bodies made of the same...Ch. 4 - Consider heat transfer between two identical hot...Ch. 4 - Consider heat transfer between two identical hot...Ch. 4 - Consider a hot baked potato on a plate. The...Ch. 4 - Consider a potato being baked in an oven that is...Ch. 4 - Consider two identical 4-kg pieces of roast beef....
Ch. 4 - Consider a sphere and a cylinder of equal volume...Ch. 4 - Obtain relations for the characteristic lengths of...Ch. 4 - Obtain a relation for the time required for a...Ch. 4 - A brick of 20310257mm in dimension is being burned...Ch. 4 - Prob. 15PCh. 4 - Prob. 16PCh. 4 - Prob. 17PCh. 4 - Metal plates...Ch. 4 - Prob. 19PCh. 4 - Prob. 20PCh. 4 - Prob. 21PCh. 4 - A 6-mm-thick stainless steel strip...Ch. 4 - After heat treatment, the 2-cm-thick metal plates...Ch. 4 - A long copper rod of diameter 2.0 cm is initially...Ch. 4 - Prob. 25PCh. 4 - Steel rods...Ch. 4 - Prob. 27PCh. 4 - Prob. 28PCh. 4 - To warm up some milk for a baby, a mother pours...Ch. 4 - A person is found dead at 5 p.m. in a room whose...Ch. 4 - Prob. 31PCh. 4 - In an experiment, the temperature of a hot gas...Ch. 4 - Prob. 33PCh. 4 - Pulverized coal particles are used in oxy-fuel...Ch. 4 - Oxy-fuel combustion power plants use pulverized...Ch. 4 - Plasma spraying is a process used for coating a...Ch. 4 - Consider a spherical shell satellite with outer...Ch. 4 - Prob. 38PCh. 4 - Prob. 39PCh. 4 - Prob. 40EPCh. 4 - Consider a sphere of diameter 5 cm, a cube of side...Ch. 4 - Prob. 42PCh. 4 - An egg is to be cooked to a certain level of...Ch. 4 - What is an infinitely long cylinder? When is it...Ch. 4 - What is the physical significance of the Fourier...Ch. 4 - Prob. 46CPCh. 4 - Prob. 47CPCh. 4 - The Biot number during a heat transfer process...Ch. 4 - A body at an initial temperature of Ti, is brought...Ch. 4 - Prob. 50PCh. 4 - In a meat processing plant, 2-cm-thick steaks...Ch. 4 - Prob. 52PCh. 4 - Prob. 53PCh. 4 - Prob. 54PCh. 4 - Prob. 55PCh. 4 - Layers of 23-cm-thick meat slabs...Ch. 4 - Prob. 57PCh. 4 - Prob. 58PCh. 4 - Prob. 59PCh. 4 - Prob. 60PCh. 4 - Prob. 61PCh. 4 - Prob. 62EPCh. 4 - Prob. 63PCh. 4 - Prob. 64PCh. 4 - Prob. 65PCh. 4 - Prob. 66PCh. 4 - A 30-cm-diameter, 4-m-high cylindrical column of a...Ch. 4 - Prob. 68PCh. 4 - Prob. 69PCh. 4 - Prob. 70PCh. 4 - For heat transfer purposes, an egg can be...Ch. 4 - Citrus fruits are very susceptible to cold...Ch. 4 - Chickens with an average mass of 1.7 kg...Ch. 4 - Prob. 74PCh. 4 - Prob. 75PCh. 4 - Prob. 76PCh. 4 - Oranges of 2.5-in-diameter...Ch. 4 - Prob. 78PCh. 4 - Prob. 79PCh. 4 - Prob. 80PCh. 4 - Prob. 81PCh. 4 - A 9-cm-diameter potato...Ch. 4 - In Betty Crocker s Cookbook, it is stated that it...Ch. 4 - Prob. 84PCh. 4 - Under what conditions can a plane wall be treated...Ch. 4 - What is a semi-infinite medium? Give examples of...Ch. 4 - Consider a hot semi-infinite solid at an initial...Ch. 4 - Prob. 88EPCh. 4 - Prob. 89PCh. 4 - In areas where the air temperature remains below...Ch. 4 - Prob. 91PCh. 4 - A highway made of asphalt is initially at a...Ch. 4 - A thick aluminum block initially at 20C is...Ch. 4 - Prob. 94PCh. 4 - A thick wall made of refractory bricks...Ch. 4 - Prob. 96PCh. 4 - Prob. 97PCh. 4 - A thick wood slab (k=0.17W/m.K,=1.2810-7m2/s) and...Ch. 4 - Prob. 99PCh. 4 - Prob. 100PCh. 4 - Prob. 101PCh. 4 - Prob. 102PCh. 4 - Prob. 103PCh. 4 - Prob. 104PCh. 4 - Prob. 105PCh. 4 - A barefooted person whose feet are at 32C steps on...Ch. 4 - What is the product solution method? How is it...Ch. 4 - How is the product solution used to determine the...Ch. 4 - Prob. 109CPCh. 4 - Consider a short cylinder whose top and bottom...Ch. 4 - Prob. 111PCh. 4 - Prob. 112PCh. 4 - Prob. 113PCh. 4 - A hot dog can be considered to be a cylinder 5 in...Ch. 4 - Prob. 115PCh. 4 - Prob. 116PCh. 4 - A 2-cm-high cylindrical ice block...Ch. 4 - Prob. 118PCh. 4 - Prob. 119PCh. 4 - Prob. 120PCh. 4 - Prob. 121PCh. 4 - Prob. 122PCh. 4 - Prob. 123PCh. 4 - Prob. 124CPCh. 4 - How does refrigeration prevent or delay the...Ch. 4 - What are the environmental factors that affect the...Ch. 4 - What is the effect of cooking on the...Ch. 4 - Prob. 128CPCh. 4 - Prob. 129CPCh. 4 - Prob. 130CPCh. 4 - Prob. 131CPCh. 4 - How does the rate of freezing affect the...Ch. 4 - Prob. 133CPCh. 4 - Prob. 134CPCh. 4 - Prob. 135CPCh. 4 - Prob. 136CPCh. 4 - Prob. 137CPCh. 4 - Prob. 138PCh. 4 - Chickens with an average mass of 2.2 kg and...Ch. 4 - Prob. 140EPCh. 4 - Prob. 141PCh. 4 - Prob. 142PCh. 4 - A long roll of 2-m-wide and 0.5-cm-thick 1-Mn...Ch. 4 - Prob. 144PCh. 4 - Prob. 145PCh. 4 - Prob. 146PCh. 4 - During a picnic on a hot summer day, the only...Ch. 4 - Two metal rods are being heated in an oven with...Ch. 4 - Stainless steel ball bearings...Ch. 4 - Prob. 150PCh. 4 - Prob. 151PCh. 4 - In Betty crockers Cookbook, it is stated that it...Ch. 4 - A watermelon initially at 35C is to be cooled by...Ch. 4 - Prob. 154PCh. 4 - Prob. 155PCh. 4 - Prob. 156PCh. 4 - Prob. 157PCh. 4 - Prob. 158PCh. 4 - Prob. 159PCh. 4 - Prob. 160PCh. 4 - Prob. 161PCh. 4 - Prob. 162PCh. 4 - Prob. 163PCh. 4 - Lumped system analysis of transient heat...Ch. 4 - Prob. 165PCh. 4 - Prob. 166PCh. 4 - An 18-cm-long, 16-cm-wide, and 12-cm-high hot iron...Ch. 4 - Prob. 168PCh. 4 - Prob. 169PCh. 4 - Prob. 170PCh. 4 - Prob. 171PCh. 4 - Prob. 172PCh. 4 - A long 18-cm-diameter bar made of hardwood...Ch. 4 - Consider a 7.6-cm-long and 3-cm-diameter...Ch. 4 - Consider a 7.6-cm-diameter cylindrical lamb meat...Ch. 4 - Prob. 176PCh. 4 - A small chicken (k=0.45W/m.K,=0.1510-6m2/s) and...Ch. 4 - A potato may be approximated as a 5.7-cm-diameter...Ch. 4 - When water, as in a pond or lake, is heated by...Ch. 4 - A large chunk of tissue at 35C with a thermal...Ch. 4 - Prob. 181PCh. 4 - Citrus trees are very susceptible to cold weather,...
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
- Q14) A 65-kg beef carcass (k-0.47 W/m °C and a-0.13x10-6 m²/s) initially at a uniform temperature of 37°C is to be cooled by refrigerated air at -6°C flowing at a velocity of 1.8 m/s. The average heat transfer coefficient between the carcass and the air is 22 W/m2°C. Treating the carcass as a cylinder of diameter 24 cm and height 1.4 m and disregarding heat transfer from the base and top surfaces, determine how long it will take for the center temperature of the carcass to drop to 4°C. Also, determine if any part of the carcass will freeze during this process. Air -6°C Beef 37°Carrow_forwardLiquid water flows in a thin-walled circular tube at a mass flow rate of 11 g/s. The water enters the tube at 60°C, where it is heated at a rate of 3.8 kW. The tube is circular with a length of 2.5 m and an inner diameter of 25 mm. The tube surface is maintained at a constant temperature. At the tube exit, a hydrogenated nitrile rubber (HNBR) o-ring is attached to the tube's outer surface. The maximum temperature permitted for the o-ring is 150°C. Is the HNBR o-ring suitable for this operation? The fluid properties at 100°C are cp= 4217 J/kg-K, k= 0.679 W/m-K, µ = 0.282 × 103 kg/m.s, and Pr = 1.75. Is this a reasonable temperature at which to evaluate the fluid properties?arrow_forwardLiquid water flows in a thin-walled circular tube at a mass flow rate of 11 g/s. The water enters the tube at 60°C, where it is heated at a rate of 3.8 kW. The tube is circular with a length of 2.5 m and an inner diameter of 25 mm. The tube surface is maintained at a constant temperature. At the tube exit, a hydrogenated nitrile rubber (HNBR) o-ring is attached to the tube’s outer surface. The maximum temperature permitted for the o-ring is 150°C. Is the HNBR o-ring suitable for this operation? The fluid properties at 100°C are cp = 4217 J/kg∙K, k = 0.679 W/m∙K, μ = 0.282 × 10−3 kg/m∙s, and Pr = 1.75. Is this a reasonable temperature at which to evaluate the fluid properties? The surface temperature of the tube is?arrow_forward
- To cool a piece of glass, initially at a temperature of 93°C, it is immersed in an aluminum tray, initially filled (to the brim) with water at 12°C. Assuming that the assembly (tray + water + glass piece) is an isolated system, determine the final temperature of the glass piece. Data:Glass pieceShape: solid parallelepipedDimensions: L = 1.2 m, L = 0.6 m and h = 0.5 mDensity: 2490 kg/m3Constant pressure mass heat: 840 J.kg-1.K-1 Initial temperature: 93°CAluminum trayShape: hollow block without lid External dimensions: L = 2 m, W = 1 m, h = 0.8 m Wall thickness: e = 12 mmDensity: 2800 kg/m3Constant Pressure Mass Heat: 910 J.kg-1.K-1 Initial Temperature: 12°CWaterDensity: 1000 kg/m3Constant pressure mass heat: 4180 J.kg-1.K-1 Initial temperature: 12°Carrow_forwardFor bacteriological testing of water supplies and in medical clinics, samples must routinely be incubated for 24 h at 37°C. Peace Corps volunteer and MIT engineer Amy Smith invented a low-cost, low-maintenance incubator. The incubator consists of a foam-insulated box containing a waxy material that melts at 37.0°C interspersed among tubes, dishes, or bottles containing the test samples and growth medium (bacteria food). Outside the box, the waxy material is first melted by a stove or solar energy collector. Then the waxy material is put into the box to keep the test samples warm as the material solidifies. The heat of fusion of the phase-change material is 205 kJ/kg. Model the insulation as a panel with surface area 0.490 m2, thickness 4.50 cm, and conductivity 0.012 0 W/m ? °C. Assume the exterior temperature is 23.0°C for 12.0 h and 16.0°C for 12.0 h. (a) What mass of the waxy material is required to conduct the bacteriological test? (b) Explain why your calculation can be done…arrow_forwardSteam is to be condensed in the condenser of a steam power plant at a temperature of 60°C with cooling water from a nearby lake, which enters the tubes of the condenser at 18°C at a rate of 75 kg/s and leaves at 27°C. Assuming the condenser to be perfectly insulated, determine the rate of condensation of the steam.arrow_forward
- The sensible and latent heat losses from a space are 22 kW and 9.5 kW respectively. The space is maintained at 21°C db-temperature and 7°C dew-point temperature. Conditioned air is supplied to the space at 35°C db-temperature. The pressure is constant at 101.3 kPa. Determine:the wb-temperature of the supply air in °Cthe mass flow rate of air in kg/sarrow_forwardStainless steel ball bearings (p = 8085 kg/m³ and cp = 0.480 kJ/(kg °C)) having a diameter of 1.5 cm are to be quenched in water at a rate of 900 per minute. The balls leave the oven at a uniform temperature of 1000°C and are exposed to air at 25 °C for a while before they are dropped into the water. If the temperature of the balls drops to 900°C prior to quenching, determine the rate of heat transfer from the balls to the air.arrow_forwardCold salt brine at -2°C is used in a packing plant to chill food slabs from 40°C to 3.4°C in 18 hours. Determine the mass of brine required to cool 100 food slabs of 225 kg each if the final temperature of the brine is 1.7°C.arrow_forward
- A steam condenser is supplied with steam, which has a specific enthalpy (calculated above 0 C) of 2-2 MJ/kg and a velocity of 70 m/s, at a rate of 2200 kg/h. The water leaving the condenser has negligible velocity and a temperature of 28°C Determine the heat absorbed by the cooling water per minute, and the required flow rate of cooling water for a temperature increase of 20 C, assuming no externalheat exchangesarrow_forwardThe moist air with barometric pressure of 101.325 kPa enters a chamber at 2.5°C Wet bulb temperature and 5°C dry bulb temperature at the rate of 90 m3/min. While passing through the chamber, the air absorbs sensible heat at the rate of 42 kW and picks up 0.01 kg/sec of saturated steam at 105°C. Determine the dry bulb and wet bulb temperatures of the leaving air.arrow_forwardA single-stage fluid with a mass flow rate of 2.5 kg / s and a heat capacity of 1800 j / kg-K is cooled from 175 ° C to 75 ° C using a single-stage fluid with a mass flow rate of 2kg / s and a heat capacity of 2250 j / kg-K. During the process, the cold fluid heats from 50 degrees Celsius to 150 degrees Celsius. For this process; Is the 1-boiler a 2-pipe heat exchanger? State mathematically whether you choose to use a 2-boiler 4-pipe heat exchanger.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Heat Transfer – Conduction, Convection and Radiation; Author: NG Science;https://www.youtube.com/watch?v=Me60Ti0E_rY;License: Standard youtube license