Mathematics for Machine Technology
7th Edition
ISBN: 9781133281450
Author: John C. Peterson, Robert D. Smith
Publisher: Cengage Learning
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Chapter 18, Problem 12A
To determine
Evaluation of the lowest fraction form of the given ratio.
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Can you prove that P(a,b) >= P(a',b) for a >= a' >= b >= 0
Figure 1 Simulation structure diagram for a turbine cold-end system.
approximated by the two fourth degree polynomial equations as follows:
The turbine "cold-and" system generally consists of turbine exhaust and condenser, and cooling tower
(Fig. 1). For a 250 MW unit, the turbine performance data with the maximum steam throttle flow can be
NHR
NEW
NHR
Turbine
and
NHR = −45.19(CP)* + 420(CP)® – 1442(CP)2 + 2248(CP) +6666 (a)
NKW = 4,883(CP)* – 44,890(CP)3 + 152,600(CP)2 – 231,500(CP) + 383,400. (b)
The condenser and mechanical-draft cooling tower have the performance equations, respectively,
CP 1.6302-0.50095 x 10-1 (CWT)
OP
Coupling 1
Condenser
CR
WFR
CWT
Coupling 2
WST
Cooling Tower
CR
System Boundary
2
(The circulating water flow is assumed to flow at the rate of 145,000 gpm.)
In addition to the given performance equations give above, we also need two coupling equations to
complete the mathematical model for this cooling system. The first equation is the coupling between the…
Chapter 18 Solutions
Mathematics for Machine Technology
Ch. 18 - Use a decimal equivalents table to find the...Ch. 18 - Compute (27.52.5+4.36)21.75 . Express the result...Ch. 18 - A cylinder has a volume, V, of 32.85 mm3. Use the...Ch. 18 - The volume V of a cube is V=s3 , where s is the...Ch. 18 - Multiply 15.328.75 .Ch. 18 - Express the decimal fraction 0.4275 as a common...Ch. 18 - Prob. 7ACh. 18 - Express the following ratios in lowest fractional...Ch. 18 - Prob. 9ACh. 18 - Express the following ratios in lowest fractional...
Ch. 18 - Prob. 11ACh. 18 - Prob. 12ACh. 18 - Prob. 13ACh. 18 - Express the following ratios in lowest fractional...Ch. 18 - Prob. 15ACh. 18 - Express the following ratios in lowest fractional...Ch. 18 - Prob. 17ACh. 18 - Prob. 18ACh. 18 - Prob. 19ACh. 18 - In Figure 18-8, gear A is turning at 120...Ch. 18 - Solve for the unknown value in each of the...Ch. 18 - Solve for the unknown value in each of the...Ch. 18 - Prob. 23ACh. 18 - Prob. 24ACh. 18 - Prob. 25ACh. 18 - Prob. 26ACh. 18 - Prob. 27ACh. 18 - Solve for the unknown value in each of the...Ch. 18 - Solve for the unknown value in each of the...Ch. 18 - Prob. 30ACh. 18 - Prob. 31ACh. 18 - Prob. 32ACh. 18 - Prob. 33ACh. 18 - Prob. 34ACh. 18 - Prob. 35ACh. 18 - Prob. 36ACh. 18 - Prob. 37ACh. 18 - Prob. 38ACh. 18 - Prob. 39ACh. 18 - Prob. 40ACh. 18 - Prob. 41ACh. 18 - Prob. 42ACh. 18 - Prob. 43ACh. 18 - Prob. 44ACh. 18 - Prob. 45ACh. 18 - Prob. 46ACh. 18 - Prob. 47ACh. 18 - A drawing has a scale of 14=3 . Determine the...
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