Heating Ventilating and Air Conditioning: Analysis and Design
6th Edition
ISBN: 9780471470151
Author: Faye C. McQuiston, Jeffrey D. Spitler, Jerald D. Parker
Publisher: Wiley, John & Sons, Incorporated
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Chapter 5, Problem 5.25P
Rework Problem 5-23 assuming that the walls are finished on the inside with R-11 (R-2) insulation and
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A wall of a house as shown in the
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coefficient hi is 1.45 Btu/hr ft²°F.
6.
Calculate the heat loss through the
wall if the house is heated such that the
room air temperature, Ti, is 70°F on a day
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State all assumptions and list the thermal
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7.
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You are asked to design a metal hot dog holder for roasting hot dogs over an open
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Solution:
2 of 4
Problem 2:
The short cylindrical block of 2014-T6 aluminum, having an original diameter of
0.5 in. and a length of 1.5 in., is placed in the smooth jaws of a vise and squeezed
until the axial load applied is 800 lb. Given young's modulus 10.6x10 psi and
Poisson ratio equal to 0.35.
a) Determine the decrease in its length
b) Determine its new diameter.
800 Ib
800 Ib
Solution:
A thin-walled spherical vessel, which is made of AISI C1020, as rolled steel has a diameter of 2.5 ft. The joint efficiency of the vessel is 80%. Internal pressure of the gas inside the vessel varies continuously from 200 psi to 400 psi. If for a Factor of Safety of 1.75 based on Soderberg criterion and the surface of the vessel is polished, find the minimum safe thickness of the vessel.
Chapter 5 Solutions
Heating Ventilating and Air Conditioning: Analysis and Design
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...
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- A short column is composed of two steel (E-31.000 ks, v=0.30) segments, each with a length of 4.5 in Segment (1) is hollow with an outside diameter of 1.20 in, and a wall thickness of 0.18 in. Segment (2) is hollow with an outside diameter of 1.56 in and a wall thickness of 0.18 in. How much shorter does the column become after a load of P-860 lb is applied? (1)arrow_forward(b) A 35-mm thick AISI 1020 steel plate is sandwiched between two 2024-T3 aluminium plates with thickness of 10-mm and 25-mm. The plates are compressed with a bolt and nut with no washers. The bolt is M14 X 2, property class 4.8 (i) Determine a suitable length for the bolt, rounded up to the nearest 5 mm. (ii) Determine the bolt stiffness. (iii) Determine the stiffness of the members.arrow_forwardLet's considera rod having a solid circular cross-section with diameter of 4 mm and it is made of a material having a Young's modulus E= 200 Gpa and a Poisson's ratio of 0.3. If a tensile force Fis subjected to that rod cross-section, the diameter becomes 3.995 mm. determine the applied force F Select one: OF 5236 N O F=15708 N Clear mopshoe Finish attemptarrow_forward
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