There are several ways of controling process fluid temperature of an Air Cooled Heat Exchanger. They are tabulated as follow :
i) Fluid bypass (manual)
ii) On-off fan operation (manual)
iii) Two-speed fans (manual or automatic)
iv) Louvers or shutters (automatic)
v) Variable pitch fans (automatic)
vi) Variable speed fans (automatic)
ii) On-off fan operation (manual)
iii) Two-speed fans (manual or automatic)
iv) Louvers or shutters (automatic)
v) Variable pitch fans (automatic)
vi) Variable speed fans (automatic)
Out of all methods, variable speed fans control is considered the most reliable as compare to others. Nevertheless, R.C. Monroe from Hudson is proposing variable pitch fans...Read more in the following article.
R.C. Monroe
Hudson Products Corp. Houston, Texas
Further Reading
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