Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN: 9781305578296
Author: John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher: Cengage Learning
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Textbook Question
Chapter 42, Problem 8RQ
If a heating system was being designed for use in Modesto, California, what temperature difference would be used for calculations?
A. 30°F
B. 40°F
C. 50°F
D. 60°F
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Students have asked these similar questions
Question 5
Neglecting internal heat sources while calculating heating loads underestimates the required heating system size.
True
False
QUESTION 1
A 120-ton capacity chiller, based on a refrigeration cycle, is used to maintain a coolant temperature of 35 deg. F. The chiller
exchanges heat to the surrounding air at 70 deg. F. This unit utilizes a 150 hp motor. What is the rate of heat removal from the
coolant, in Btu/hr?
O1,440,000
O 381,675
O 1,821,675
O 120
QUESTION 2
A powerplant operates between a furnace at 990 deg. Fand cooling water delivered from a nearby river at 70 deg. F. What is the
maximum possible efficiency of this powerplant, in %?
Oa. 72.8%
Ob. 27.2%
Oc 92.9%
Od.63.4%
QUESTION 3
If fuel oil is supplied to a power plant furnace at a rate of 60,000 gallons/hr, and the oil has a heating value of 150,000 Btu/gallon,
and the plant has a thermal efficiency of 30%, what is the power output of this plant (in MW)?
Oa. 2637.6
Ob.9000
Oc 2700
d. 791.3
What does a 1 ton refrigerant represent: a. The weight of the air conditione r b. The amount heat required to cool 1 ton of air in 1 hour c. The amount of heat required to melt 1 ton of ice at 0 degree in 24 hours d. The weight of the refrigerant used.
Chapter 42 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 42 - An oversized air-conditioning system will A. cost...Ch. 42 - Methods used to calculate the heat gain and heat...Ch. 42 - An exterior wall A. separates a conditioned...Ch. 42 - A partition wall A. separates a conditioned...Ch. 42 - As the temperature differential across a panel...Ch. 42 - The typical indoor design temperature used for...Ch. 42 - The typical indoor design temperature used for...Ch. 42 - If a heating system was being designed for use in...Ch. 42 - If an air-conditioning system was being designed...Ch. 42 - If the R-value of a construction material is 2.0,...
Ch. 42 - If a wall is made up of four different materials,...Ch. 42 - Prob. 12RQCh. 42 - All of the following are taken into account on a...Ch. 42 - How much heat is lost through a 3' 5' single-pane...Ch. 42 - Which of the following is(are) true regarding a...Ch. 42 - Which of the following is(are) true regarding the...
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