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 3, Problem 27RQ
Define heat of compression, and explain how it is computed.
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Flow between
parallel plates
h
Y
Q
water flow
Perforated plate
inflow inside
u+ou
You have a channel system in which the water
leaky-wall BC flows through and is bounded with two
perforated plates at the bottom and the top.
Consider steady, incompressible, laminar flow
between two infinite parallel horizontal plates as
shown in the figure. h is the half of the hydraulic
aperture (m). At the top and the bottom,
perforated blocks are connected on both side
plates a liquid inflows and mixes into the main
water flow channel system and you would like to
evaluate the total volumetric flow rate Q (m³ s¹).
бл
0-
2
-by
Perforated plate
inflow inside
leaky-wall BC
P+5P
The flow is in the x-direction, and there is no velocity component in either the y-or z-direction (i.e., v = 0
and w=0). In steady-state conditions applying the simple form of the Navier-Stokes equations (or similar
to Poiseuille's law), along with the assumptions that v = 0, w = 0, and u = u(y) yields
88
др
μ
др
др
=-pg,
=0
Oz.…
A pump is used to deliver water from a reservoir to a large tank for a flow rate of 1310 L/s at 20 °C. The connecting pipe connects the reservoir at B with a square-edged entrance.
7.5 (A/B). Fig. 7.18 shows the cross-section of a beam which carries a shear force of 20 kN. Plot a graph to scale
which shows the distribution of shear stress due to bending across the cross-section.
[I.Mech.E.] [21.7, 5.2, 5.23 MN/m².]
12 mm
75 mm
40mm
-50mm-
Chapter 3 Solutions
Refrigeration and Air Conditioning Technology (MindTap Course List)
Ch. 3 - Name three reasons why ice melts in an icebox:...Ch. 3 - What are the approximate temperature ranges tor...Ch. 3 - One ton of refrigeration is A. 1200 Btu. B. 12,000...Ch. 3 - Describe briefly the basic refrigeration cycle.Ch. 3 - What is the relationship between pressure and the...Ch. 3 - What is the function of the evaporator in a...Ch. 3 - What does the compressor do in the refrigeration...Ch. 3 - Define a superheated vapor.Ch. 3 - The evaporating pressure is 76 psig for R-22 and...Ch. 3 - If the evaporating pressure was 76 psig for R-22...
Ch. 3 - Define the term subcooled liquid.Ch. 3 - The condensing pressure is 260 psig and the...Ch. 3 - The condensing pressure is 260 psig and the...Ch. 3 - What is meant by a saturated liquid and vapor?Ch. 3 - What is meant by desuperheating a vapor?Ch. 3 - What happens to the refrigerant in the condenser?Ch. 3 - What happens to refrigerant heat in the condenser?Ch. 3 - The metering device A. cycles the compressor. B....Ch. 3 - What is adiabatic expansion?Ch. 3 - Describe flash gas, and tell how it affects...Ch. 3 - Quality means _________ when referring to a...Ch. 3 - Describe the difference between a reciprocating...Ch. 3 - List the cylinder color codes for R-12, R-22,...Ch. 3 - Define enthalpy.Ch. 3 - Define a pure compound refrigerant, and give two...Ch. 3 - Define net refrigeration effect as it applies to...Ch. 3 - Define heat of compression, and explain how it is...Ch. 3 - Define flash gas, and explain how it applies to...Ch. 3 - Define temperature glide as it pertains to a...Ch. 3 - Define a zeotropic refrigerant blend, and give an...Ch. 3 - Define a near-azeotropic refrigerant blend, and...
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