12 Strength Analysis of a Plate Heat Exchanger …
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Table 12.4 Stress categorization and assessment at the connection zone between the square-circle
transition shell and air inlet nozzle under load case 1
Paths Stress category Calculated stress, MPa Allowable stress, MPa Assessment results
Path 8 P m
19.20
134.2
Pass
Path 5 P L
43.60
147.6
Pass
P L + P b + Q
58.29
402.6
Pass
Similarly, as an example, Fig. 12.7 shows the paths at the connection zone between
the curved plate and water inlet nozzle under load case 2. Table 12.5 lists stress
categorization and assessment for each path.
It turns out that all types of Mises equivalent stresses in the whole equipment are
less than the corresponding allowable values according to ASME VIII-2, meaning
the plate heat exchanger meets the strength requirements based on Elastic Stress
Analysis Method.
Fig. 12.7 Paths at the
connection zone between the
curved plate and water inlet
nozzle under load case 2
Table 12.5 Stress categorization and assessment at the connection zone between the curved plate
and water inlet nozzle under load case 2
Paths Stress category Calculated stress, MPa Allowable stress, MPa Assessment results
Path 4 P m
21.76
134.2
Pass
Path 1 P L
12.61
147.6
Pass
P L + P b + Q
88.92
402.6
Pass
Path 2 P L
24.17
147.6
Pass
P L + P b + Q
111.32
402.6
Pass
Path 3 P L
23.68
147.6
Pass
P L + P b + Q
110.8
402.6
Pass