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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Textbook Question
Chapter 5, Problem 5.38P
Compute the temperature of the metal roof deck of the roof—ceiling assembly shown in Table 5-4b when the outdoor temperature is 0 F (—18 C) and the indoor temperature is 72 F (22 C) with RH of 45 percent, (a) with the rigid insulation (construction 2) and (b) without the insulation (construction 1). (c) Would you expect any condensation problems on the underside of the metal deck in either case? Explain.
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Question 3
This question requires the use of the steam property tables (Rogers and Mayhew) uploaded
on QM+ exam section. All properties should be evaluated at the temperature of the steam.
Saturated, pure steam at a temperature of 170 °C condenses on the outer surface of a
vertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at a
uniform temperature of 150 °C.
Calculate:
a)
the local film condensation heat-transfer coefficient at the bottom of the tube.
b) the average condensation heat-transfer coefficient over the entire length of the tube.
c)
the total condensation rate at the tube surface.
Saturated, pure steam at a temperature of 170 oC condenses on the outer surface of avertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at auniform temperature of 150 oC.Calculate:a) the local film condensation heat-transfer coefficient at the bottom of the tube.
b) the average condensation heat-transfer coefficient over the entire length of the tube.
c) the total condensation rate at the tube surface.
Question 3
This question requires the use of the steam property tables (Rogers and Mayhew) uploaded
on QM+ exam section. All properties should be evaluated at the temperature of the steam.
Saturated, pure steam at a temperature of 170 °C condenses on the outer surface of a
vertical tube of outer diameter 2 cm and length 1.5 m. The tube surface is maintained at a
uniform temperature of 150 °C.
Calculate:
the local film condensation heat-transfer coefficient at the bottom of the tube.
a)
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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