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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Chapter 40, Problem 4RQ
A typical temperature relationship between a high-efficiency condenser and the ambient temperature is
A. 10°F.
B. 20°F.
C. 30°F.
D. 40°F.
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Given answers to be: i) 14.65 kN; 6.16 kN; 8.46 kN ii) 8.63 kN; 9.88 kN iii) Bearing 6315 for B1 & B2, or Bearing 6215 for B1
(b)
A steel 'hot rolled structural hollow section' column of length 5.75 m, has
the cross-section shown in Figure Q.5(b) and supports a load of 750 kN.
During service, it is subjected to axial compression loading where one end
of the column is effectively restrained in position and direction (fixed) and
the other is effectively held in position but not in direction (pinned).
i)
Given that the steel has a design strength of 275 MN/m², determine
the load factor for the structural member based upon the BS5950
design approach using Datasheet Q.5(b).
[11]
ii)
Determine the axial load that can be supported by the column
using the Rankine-Gordon formula, given that the yield strength of
the material is 280 MN/m² and the constant *a* is 1/30000.
[6]
300
600
2-300 mm
wide x 5 mm
thick plates.
Figure Q.5(b)
L=5.75m
Pinned
Fixed
Chapter 40 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 40 - The standard design conditions for...Ch. 40 - The typical temperature relationship between a...Ch. 40 - The evaporator will normally operate at a(n)...Ch. 40 - A typical temperature relationship between a...Ch. 40 - How is condenser high efficiency obtained?Ch. 40 - High-efficiency air-conditioning systems may use...Ch. 40 - What does the head pressure do If the suction...Ch. 40 - What will cause the suction pressure to rise?Ch. 40 - The evaporator design temperature may in some...Ch. 40 - The seasonal energy efficiency ratio (SEER)...
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