HEATING, VENTILATING,+AC ANAL...EBOOK>I<
6th Edition
ISBN: 2819480255750
Author: Mcquiston
Publisher: INTER WILE
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 5, Problem 5.33P
A 100 ft length of buried, uninsulated steel pipe carries chilled water at a mean temperature of 42 F. The pipe is 30 in. deep and has a 4 in. diameter. The thermal conductivity of the earth is about
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Q2:-
A sphere made of pure copper, which is 13 mm in diameter, is 70 °C (at
t=0) when it inserted into a gas having a temperature of 25 °C. After 65
s the temperature of the sphere reach 60 °C. Make the appropriate
assumption to find the heat transfer coefficient of the gas. What is the
temperature of the sphere after 80 s.
(A;=TT D2, V= TT D³/6, Lc=V/ A,)
Answer this ASAP
The diameter of the tube is 25 mm.
The specific heat of water is 4.18 kJ/kg.°C.
The overall heat transfer coefficient is 0.7 kW/m².°C.
1. Schematic of temperature distribution
2.ΔTLMTD
3.Actual heat transfer rate
4.Cmin
5.Maximum heat transfer rate
The steel pipe has an internal radius of 50 mm., a thickness of 5 mm. and a length of 5 m. Inside the pipe, hot fluid with temperature 80 C flows inside the pipe and cold fluid with temperature 20 C flowing outside the pipe. Let k=285 W/mC and hi= 25 W/mC, ho= 10 W/mC. Find
4.1) Heat Transfer Rate (Q)
4.2) Temperature on both inner and outer tube surfaces...
Chapter 5 Solutions
HEATING, VENTILATING,+AC ANAL...EBOOK>I<
Ch. 5 - Determine the thermal conductivity of 4 in. (100...Ch. 5 - Compute the unit conductance C for 512 in. (140...Ch. 5 - Compute the unit thermal resistance and the...Ch. 5 - What is the unit thermal resistance for an inside...Ch. 5 - Compute the thermal resistance per unit length for...Ch. 5 - Assuming that the blocks are not filled, compute...Ch. 5 - The partition of Problem 5-4 has still air on one...Ch. 5 - The pipe of Problem has water flowing inside with...Ch. 5 - Compute the overall thermal resistance of a wall...Ch. 5 - Compute the overall heat-transfer coefficient for...
Ch. 5 - Estimate what fraction of the heat transfer for a...Ch. 5 - Make a table similar to Table 5-4a showing...Ch. 5 - Estimate the unit thermal resistance for a...Ch. 5 - Refer to Problem 5-13, and estimate the unit...Ch. 5 - A ceiling space is formed by a large flat roof and...Ch. 5 - A wall is 20 ft (6.1 m) wide and 8 ft (2.4 m) high...Ch. 5 - Estimate the heat-transfer rate per square foot...Ch. 5 - A wall exactly like the one described in Table...Ch. 5 - Prob. 5.19PCh. 5 - Compute the overall heat-transfer coefficient for...Ch. 5 - Compute the overall heat transfer for a single...Ch. 5 - Determine the overall heattransfer coefficient for...Ch. 5 - A basement is 2020ft(66m) and 7 ft (2.13 m) below...Ch. 5 - Estimate the overall heat-transfer coefficient for...Ch. 5 - Rework Problem 5-23 assuming that the walls are...Ch. 5 - A heated building is built on a concrete slab with...Ch. 5 - A basement wall extends 6 ft (1.8 m) below grade...Ch. 5 - A 2440ft(7.312.2m) building has a full basement...Ch. 5 - The floor of the basement described in Problem...Ch. 5 - Assume that the ground temperature tg is 40 F (10...Ch. 5 - Use the temperatures given in Problem 5-30 and...Ch. 5 - A small office building is constructed with a...Ch. 5 - A 100 ft length of buried, uninsulated steel pipe...Ch. 5 - Estimate the heat loss from 100 m of buried...Ch. 5 - A large beverage cooler resembles a small building...Ch. 5 - Consider the wall section shown in Fig. 5-10. (a)...Ch. 5 - A building has floor plan dimensions of 3060ft....Ch. 5 - Compute the temperature of the metal roof deck of...Ch. 5 - Consider the wall section shown in Fig. -4a,...Ch. 5 - Consider the knee space shown in Fig. 5-11. The...Ch. 5 - Estimate the temperature in an unheated basement...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Assume a physical setup as in Fig. P3.6(a). We now heat the cylinder. What happens to P, T, and v (up, down, or...
Fundamentals Of Thermodynamics
1.1 What is the difference between an atom and a molecule? A molecule and a crystal?
Manufacturing Engineering & Technology
Use Mohrs circle to determine the normal stress and shear stress acting on the inclined plane AB.
Statics and Mechanics of Materials (5th Edition)
Determine the magnitude of the moment of the force F = {50i 20j 80k} N about the base line AB of the tripod.
INTERNATIONAL EDITION---Engineering Mechanics: Statics, 14th edition (SI unit)
Determine the normal stress in each member of the truss structure. All joints are ball joint, and the material ...
Introduction To Finite Element Analysis And Design
ICA 8-51
The thermal conductivity of a plastic is 0.325 British thermal units per foot hour degree Fahrenheit [...
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
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
- Q1: Water at 80 oC is pumped through 100 m of stainless steel pipe, k=16 W/m.K of inner and outer radius 47 mm and 50 mm respectively. The heat transfer coefficient due to water is 2000 W/m2.K. The outer surface of the pipe loses heat by convection to air at 20 oC and the heat transfer coefficient is 200 W/m2.K. Calculate the heat flow through the pipe. Also calculate the heat flow through the pipe when a layer of insulation, k=0.1 W/m.K and 50 mm radial thickness is .wrapped around the pipearrow_forwardHot water is transferred through a stainless steel pipe of 0.06m inside diameter and 5m length. The inside wall temperature is 100OC, the outside surface temperature is 80OC, the thermal conductivity of stainless steel is 16 W/mOC, and the wall thickness is 10 mm. Calculate the heat losses if the system is at steady state.arrow_forwardA 4-inch insulated arctic pipe is used for a construction camp. The lake source is 1500 meters away. The line is above ground on mud sills. Calculate the heat loss from the pipe if the outside ambient temperature is -40 deg F (minus 40). and the water coming out of the lake is at 1 deg C. Assume that the ID is 4-inches, OD is 4.5- inches and it s covered by 2-inches of urethane insulation. Use a k-factor of 34.9 BTU/hr-ft-degF for the pipe, 0.16 BTU-in/hr-ft2-degF for insulation, and an inside and outside convective film coefficients of 12.3 BTU/hr- ft2-deg F and 6.2 BTU/hr-ft2-deg F. Answer C 13.7 kW C 18.5 kW C 25.0kW C 28.5kWarrow_forward
- Sipho’s mother is making a fire in the stove inside a shack using coal. A fan is used to extract the flue gasfrom the fire via a chimney made of zinc material. The wall thickness of Chimney is L=4mm and the walltemperature of the chimney on the flue gas side is T_si=60˚C. Sipho, playing outside next to the chimneyexperiences an ambient temperature of 20˚C. The surrounding temperature is T_sur=35˚C and the emissivityis ε=0.95. Assume the convection coefficient is 20W/m2K and the chimney is grey material.Under these conditions determine the outer surface (air side) temperature T_so=? of the chimney.arrow_forwardQ2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is 50W/m?.°C. Take density=2707kg/m3, specific heat=0.9KJ/kg.°C and thermal conductivity= 204W/m °C. إجابت * Determine the Bi number 0.00696 0.000696 0.0052 0.00052 0 أخری *.Determine the time required to cool sphere to 263K 26.28min 262.8min 52.56 min 525.6 min O أخریarrow_forwardWater going into a pipe with a tempeture of T1 and going out T2 . ambient tempeture is T0. flow rate q. Develop an expression for T2 ( based on heat transfer) Length of the pipe Lh0 - convective heat transfer coefficient of the airhW -convective heat transfer coefficient of the waterk- pipe thermal conductivity (W/m·K)d – pipe diameter Use any other varilable that you need and can be found online easily .arrow_forward
- Using a 130 cm- long lead pipe with 2 cm inside diameter, a liquid water is transferred at 4 degrees Celsius. Its outside diameter measures 3 cm and the temperature of air outside is 20-deg C. The inside wall of the said pipe has a temperature of 8 degrees Celsius. Solve for: Outside area as basis, find (U) overall heat transfer coefficientarrow_forwardConduction 1. A thermodynamic analysis of a proposed Brayton cycle gas turbine yields P= 5 MW of net power production. The compressor, at an average temperature of T. = 400°C, is driven by the turbine at an average temperature of T₁ = 1000°C by way of an L = 1m-long, d= 70mm - diameter shaft of thermal conductivity k = 40 W/m K. Compressor min T Combustion chamber Shaft L Turbine Th out (a) Compare the steady-state conduction rate through the shaft connecting the hot turbine to the warm compressor to the net power predicted by the thermodynamics- based analysis. (b) A research team proposes to scale down the gas turbine of part (a), keeping all dimensions in the same proportions. The team assumes that the same hot and cold temperatures exist as in part (a) and that the net power output of the gas turbine is proportional to the overall volume of the device. Plot the ratio of the conduction through the shaft to the net power output of the turbine over the range 0.005 m s Ls 1 m. Is a…arrow_forwardAir surrounding a light bulb is moving at 25 m/sec. The surrounding conditions are kept at atmospheric pressure and at temperature 25o C. The light bulb external surface is kept at 140o C. What is the heat transfer rate from the light bulb to the surrounding? Assume the light bulb as a sphere with a diameter of 50 mm.arrow_forward
- To cool hot oil, an engineer has suggested that the oil be pumped through a pipe submerged in a nearby lake. The pipe (external diameter = 15 cm) will be placed in the horizontal direction. The temperature of the outer surface of the pipe averages 125 ° C. The surrounding water temperature is assumed to be constant at 15 ° C. Pipe length 125 m. If it is assumed that there is no water movement. a. Determine the convective heat transfer coefficient of the outer pipe surface to the water. = Answer Watt / (m² ° C) b. Determine the heat transfer rate from the pipe to the water. = Answer kWarrow_forwardQ2/ An aluminum sphere weighting 7kg and initially at a temperature of 533K is suddenly immersed in a fluid at 283K. if heat transfer coefficient between the sphere and fluid is 50W/m?.°C. Take density=2707kg/m3, specific heat-0.9KJ/kg.°C and thermal conductivity= 204W/m °C.arrow_forward1. A lead pipe has 2 cm inside diameter, 3 cm outer diameter, length of 130 cm. Liquid water at 4°C flows through the pipe with a bulk velocity of 2.50 km/hr. Air is blown around the outside of the pipe at 20 deg C. The inside wall of the said pipe has a temperature of 8 deg Celsius. Find: a. Overall heat coefficient (U) based on outside surface area b. Prandtl (Pr) and Reynolds (Re) numbers based on classification of flowarrow_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