TUBE FOULING MONITOR
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United States of America Patent
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Issued Date -
Jul 30, 2009
app pub date -
Jan 28, 2009
filing date -
Jan 28, 2008
priority date (Note) -
Abandoned
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Abstract
A method for measuring the effects of fouling of heat transfer tubes in heat exchangers where a cooling fluid at lower temperature is removing heat from another fluid at higher temperature includes placing a nonrestrictive mass flow rate and temperature measuring tube extension sensor on a tube outlet end; obtaining the tube inlet temperature for deriving the rise in fluid temperature; analytically computing the amount of heat transferred from the hot fluid to the cold fluid; from tube length, inside and outside tube diameter, analytically deriving the tube heat transfer coefficient; and determining tube fouling factor, the value of which is the fraction of the clean tube heat transfer coefficient available for transferring heat, by dividing the heat transfer coefficient by the known heat transfer coefficient of an unfouled tube.
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