Chemical Engineering February 2017 - 55

Cycle design and optimization
Cyclic refrigeration units are used
for reducing and maintaining the
temperature of a body below the
general temperature of its surroundings.
In a refrigerator, heat is
pumped from a low-temperature
heat source to high-temperature
surroundings. According to the second
law of thermodynamics, this
process can only be performed with
some aid of external work. The vapor-compression
refrigeration cycle
(which is a type of cyclic refrigeration)
is used in most household refrigerators,
as well as in many large
industrial systems. The advantages
of choosing this route are that the
technology is mature, the costs are
relatively low and the process has
the capacity to be driven directly
with electrical or mechanical energy.
For initial consideration of the
compressor, we must perform calculations
to determine the operating
conditions and system function, the
type of working fluids and the system
FIGURE 2. Centrifugal compressors include several critical internal components that cannot be ignored
during the preliminary design phase
size and requirements, as well as
the economic analysis of the whole
cycle. By completing these steps
prior to beginning the preliminary
design, we are establishing boundary
conditions, performance requirements
and geometric constraints
for the compressor before committing
to a design that may or may not
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Circle 07 on p. 70 or go to adlinks.chemengonline.com/66425-07
CHEMICAL ENGINEERING WWW.CHEMENGONLINE.COM
Circle 24 on p. 70 or go to adlinks.chemengonline.com/66425-24
PSL quarter page-CE Feb2017.indd 1
FEBRUARY 2017
12/01/2017 16:20
55

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Chemical Engineering February 2017

Table of Contents for the Digital Edition of Chemical Engineering February 2017

Contents
Chemical Engineering February 2017 - Cover1
Chemical Engineering February 2017 - Cover2
Chemical Engineering February 2017 - Contents
Chemical Engineering February 2017 - 2
Chemical Engineering February 2017 - 3
Chemical Engineering February 2017 - 4
Chemical Engineering February 2017 - 5
Chemical Engineering February 2017 - 6
Chemical Engineering February 2017 - 7
Chemical Engineering February 2017 - 8
Chemical Engineering February 2017 - 9
Chemical Engineering February 2017 - 10
Chemical Engineering February 2017 - 11
Chemical Engineering February 2017 - 12
Chemical Engineering February 2017 - 13
Chemical Engineering February 2017 - 14
Chemical Engineering February 2017 - 15
Chemical Engineering February 2017 - 16
Chemical Engineering February 2017 - 17
Chemical Engineering February 2017 - 18
Chemical Engineering February 2017 - 19
Chemical Engineering February 2017 - 20
Chemical Engineering February 2017 - 21
Chemical Engineering February 2017 - 22
Chemical Engineering February 2017 - 23
Chemical Engineering February 2017 - 24
Chemical Engineering February 2017 - 25
Chemical Engineering February 2017 - 26
Chemical Engineering February 2017 - 27
Chemical Engineering February 2017 - 28
Chemical Engineering February 2017 - 29
Chemical Engineering February 2017 - 30
Chemical Engineering February 2017 - 31
Chemical Engineering February 2017 - 32
Chemical Engineering February 2017 - 33
Chemical Engineering February 2017 - 34
Chemical Engineering February 2017 - 35
Chemical Engineering February 2017 - 36
Chemical Engineering February 2017 - 37
Chemical Engineering February 2017 - 38
Chemical Engineering February 2017 - 39
Chemical Engineering February 2017 - 40
Chemical Engineering February 2017 - 41
Chemical Engineering February 2017 - 42
Chemical Engineering February 2017 - 43
Chemical Engineering February 2017 - 44
Chemical Engineering February 2017 - 45
Chemical Engineering February 2017 - 46
Chemical Engineering February 2017 - 47
Chemical Engineering February 2017 - 48
Chemical Engineering February 2017 - 49
Chemical Engineering February 2017 - 50
Chemical Engineering February 2017 - 51
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Chemical Engineering February 2017 - 53
Chemical Engineering February 2017 - 54
Chemical Engineering February 2017 - 55
Chemical Engineering February 2017 - 56
Chemical Engineering February 2017 - 57
Chemical Engineering February 2017 - 58
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Chemical Engineering February 2017 - 60
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Chemical Engineering February 2017 - 66
Chemical Engineering February 2017 - 67
Chemical Engineering February 2017 - 68
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Chemical Engineering February 2017 - 70
Chemical Engineering February 2017 - 71
Chemical Engineering February 2017 - 72
Chemical Engineering February 2017 - Cover3
Chemical Engineering February 2017 - Cover4
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