Air enters a 28-cm diameter pipe steadily at 200 kPa and 20°C with a velocity of 5 m/s. Air is heated as it flows, and leaves the pipe at 180 kPa and 40°C. The volume flow rate of air at the inlet (m3/s)

Air enters a 28-cm diameter pipe steadily at 200 kPa and 20°C with a velocity of 5 m/s. Air is heated as it flows, and leaves the pipe at 180 kPa and 40°C. The volume flow rate of air at the inlet (m3/s)

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter7: Forced Convection Inside Tubes And Ducts

Section: Chapter Questions

Problem 7.55P

See similar textbooks

Related questions

Q: Steam enters a long, horizontal pipe with an inlet diameter of D1 = 16 cm at 2 MPa and 300°C with a…

A: Given data,

Q: A 5-m-long section of an air heating system of a house passes through an unheated space in the…

A: Given that, Length of section, L=5 m,Cross-section of heating system, Ac=20 cm×25 cm,Pressure of hot…

Q: 1 kg water is flowing through an inclined pipe at inflow velocity of 20 m/s. The pressure at the…

A: Given data, P = 200 kPa m = 1 kg V = 20 m/s Find Total Energy (E)

Q: Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 6 Mpa, 900…

Q: A desktop computer is to be cooled by a fan whose flow rate is 0.30 m3/min. Determine the mass flow…

A: Given data as per question Air flow rate = 0.30 m3/min air density = 0.7 kg/m3 air velocity = 95…

Q: In many manufacturing plants, individuals are often working around high-temperature surfaces.…

A: Given, Inlet temperature, Ti=597°COutlet temperature, To=47°Cvelocity, v=1m/sDensity,…

Q: Steam at 200 psia and 600 •Ƒ enters a turbine through a 3-inch diameter pipe with a velocity of 10…

Q: What is the caloric theory? When and why was it abandoned?

A: Caloric theory :- According to caloric theory the heat is odor less, colorless, massless and…

Q: In a steady flow apparatus, 135 kJ of work is done by each kg of fluid. The specific volume of the…

Q: Steam enters a nozzle at 5Mpa and 400C steadily with a velocity of 75m/s and leaves at 2Mpa and…

Q: Someone claims, based on temperature measurements, that the temperature of a fluid rises during a…

Q: The cross section of the rectangular duct of the heating system is 15 cm x 20 cm (figure shown…

Q: Refrigerant R-134a at 500 kPa and 171 enters an adiabatic nozzle steadily with a velocity of 15…

Q: Q 3. A 5-m-long section of an air heating system of a house passes through an unheated space in the…

A: Given, The average velocity of the hot air, v=5 m/s The cross-section of the rectangular duct, 20…

Q: Air enters the duct of an air-conditioning system at 15 psia and 50°F at a volume flow rate of 450…

A: Given: The inlet pressure of the air in the duct is P1=15 psia. The inlet temperature of the air in…

Q: Air enters a 16-cm-diameter pipe steadily at 200 kPa and 20°C with a velocity of 5 m/s. Air is…

A: solution v1=5m/sR=0.287kPa-m3/kgkd=16 cm(a) volume of flow rate AT INLET , Q1=AV1= π/4 X (0.16)2 X…

Q: In a steady flow apparatus, 135 kJ of work is done on each kg of fluid. The specific volume of the…

Q: The air in a 6 m x 5 m x 4 m hospital room is to be completely replaced by conditioned air every 20…

Q: Air flows through a nozzle from a large vessel in which the pressure and temperature are 500 kPa and…

Q: Water enters the constant 130-mm inside-diameter tubes of a boiler at 7 MPa and 65°C and leaves the…

A: Given Data:-p1 =7 Mpa P2=6MpaT1=65°C T2 =450°C…

Q: Can a steady-flow system involve boundary work?

A: Steady flow system- In the case of steady flow system, the fluid properties does not vary with…

Q: Helium at 14.7 psia is compressed at a constant temperature of and 68 degrees Fahrenheit. Calculate…

Q: The temperature at the inner and outer surfaces of a boiler wall made of 25 mm thick steel and…

A: solutiongiven dataTi=350°CT∘=600°Cb1=25 mmb2=15 mmks=68 w/m°CKins=0.126 w/m°C

Q: (a) A garden hose attached with a nozzle is used to fill a 20-gallon bucket. The inner diameter of…

Q: Air enters a compressor at atmospheric conditions of 20 C and 80 kPa and exits at 800 kPa and 200 C…

A: Given Atmospheric temperature = 20 C Atmospheric pressure = 80 kPa Exit temperature = 200 C Exit…

Q: Air is compressed polytropically from 101 Kpa and 23 °C and delivered to a tank at 1500 kpa and 175…

Q: The fan on a personal computer draws 0.3 ft3 /s of air at 14.7 psia and 70°F through the box…

Q: fa river flowing toward a lake at an average velocity of 5 m/s at a rate of500 m3/s at a location 90…

A: Given: Average Velocity (V)= 5m/sHeight of the river water above lake surface (h)=90mVolumetric flow…

Q: Steam enters a long, insulated pipe at 1200 kPa, 250°C, and 4 m/s and exits at 1000 kPa. The…

A: Given data as per question Pressure of steam at entry =1200 kpa Temperature at entry = 250°Cvelocity…

Q: In a steady flow apparatus, 135 kJ of work is done by each kg of fluid. The specific volume of the…

A: Answer: The specific internal energy is -20 kJ/kg (Decreases). Hence, the correct answer is option…

Q: A steady-flow compressor is used to compress helium from 15 psia and 70 F at the inlet to 200 psia…

Q: In a steady flow apparatus 135kJ of work is done on each kg of fluid. The specific volume of the…

Q: In a steady flow apparatus, 135 kJ of work is done on each kg of fluid. The specific volume of the…

Q: Steam enters a nozzle steadily 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 300°C and…

A: Calculated exit velocity of nozzle in (m/s).

Q: ater flows in a 5-cm-diameter pipe at a velocity of 0.75 m/s. The mass flow rate of water in the

A: D=5CM V=0.75m/s

Q: It is proposed to have a water heater that consists of an insulated pipe of 7.5-cm diameter and an…

A: Given: The diameter of pipe is D=7.5 cm. The rate of water enters the pipe is V=24 L/min. The…

Q: Air enters a 28-cm diameter pipe steadily at 200 KPa and 20oC with a velocity of 5 m/s. Air is…

Q: A pump increases the water pressure from 8 kPa at the inlet to 700 kPa at the outlet. water enters…

Q: A 5 - m long section of an air heating system of a house passes through an unheated space in the…

A: Given, L = 5 m Ac = 0.2 m X 0.25 m T1= 60 C T2 = 54 C P1 = 100 kPa V = 5 m/s Cp = 1.007 kJ/kg K

Q: A 30 cm diameter pipe carries oil of 800 kg/m3 at 2m/s. At another section, the diameter is 20 cm.…

Q: A 4-m-long section of an air heating system of a house passes through an unheated space in the…

A: Heat supplied is the heat supplied for the power generation or for the useful work of a machine.…

Q: In a steady flow apparatus, 135 kJ of work is done by each kg of fluid. The specific volume of the…

Q: A pump increases the water presssure from 8kPa at the inlet to 700 kPa at the outlet. Water enters…

Q: Steam enters a long, horizontal pipe with an inlet diameter of D1 =12 cm at 1 MPa and 300°C with a…

Q: 1-122 A4-m-long section of an air heating system of a house passes through an unheated space in the…

Question

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

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

Assuming the clearance is negligible for a single stage compressor with the followingdata.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/minTake “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1. What is the power input to the compressor if compression is isentropic in kW to 3 decimal places? 2. What is the power input to the compressor in kW to 3 decimal places if the compression reversible isothermal?
Assuming the clearance is negligible for a single stage compressor with the followingdata.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/minTake “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1. What is the power input to the compressor in kW to 2 decimal places if the compression is polytropic compression process with n=1.25? 2. What is the delivery temperature of air for an isentropic compression process in Kelvin to 1 decimal place? 3. What is the power input to the compressor in kW to 3 decimal places if the compression reversible isothermal?
Heat transfers Air is to be heated from 15 C to 270 C, as it flows through a tube 25mm diameter at average velocity 30 m/s. The tube surface is maintained at 280 C and the air is to be provided at rate 0.013 kg/s. Take the water properties k=0.0336 W/m.C , υ = 25.9× 10-6 m2/s , Cp=1.014 kJ/kg.C , ρ = 0.8826 kg/ m3 , Pr=0.689 . Determine the following The necessary tube length Heat transfer coefficient Heat transfer rate
Air enters a 5 cm ID smooth-walled tube at 27°C with an average velocity of 3 m/s. The tube wall has a constant heatflux applied to it, qw = 380 W/m2K. Plot Tb(x) and Tw(x) until Tb reaches 38°C.
Determine the power required for a forced draught and induced draught fan in a boiler having coal consumption of 25 kg/min and air/fuel ratio of 19 by mass. The ambient air temperature and hot gas temperature at exit are 30C and 140 C respectively. Draught required is equivalent to 32.2 mm of water and mechanical efficiency of motor/fan is merely 70%alz
For a fixed compressor inlet velocity and flow area, explain the effect of increasing compressor inlet temperature (i.e., summertime operation versus wintertime operation) on the inlet mass flow rate and the net power output with all other parameters of the problem being the same.
Flow Characteritistics( Enternce Effect) Why was there some diagrement between the actual Pitot tube velocity profile and the power law velocity profile?
In quantity flow measurement using pitot tube, is it necessary to get the average velocity? Why?
QS: Water at 15.56°C i to be heated in a 2-mm-ID tube until the exit temperature reaches 26.67+C. The tube wall temperature is maintained at 48.99-C and the inlet flow velocity is 0.3 m/s. Calculate the length of tube required in meters to accomplish this heating. Also calculate the total heating required, expressed in watts. Answers: L=0.13 m
Assuming the clearance is negligible for a single stage compressor with the following data.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/minTake “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1.What is the power input to the compressor in kW to 2 decimal places if the compression is polytropic compression process with n=1.25?
Assuming the clearance is negligible for a single stage compressor with the followingdata.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/minTake “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K Calculate the following 1 What is the delivery temperature of air for an isentropic compression process in Kelvin to 1 decimal place? 2 What is the delivery temperature of air for a polytropic compression process with n=1.25 in Kelvin to 1 decimal place?
Water at 20°C flows in a 100-mm-diameter new cast iron pipe with a velocity of 5.0 m/s. Determine thepressure drop in kPa per 100 m of pipe and the power lost (in kilowatts) to friction.Ans. 314 kPa per 100 m, 12.36 kW per 100 m [Note: Indicate the formula used in determining the friction factor. (Colebrook Equation, Haaland Equation, andor Swamee Jain Equation). If not given, Use properties of fluid based on temperature available on the internet. E.g. (density, viscosity) . Apply roughness of pipe values from https://www.pipeflow.com/pipe-pressure-drop-calculations/pipe-roughness}