Tube cleanliness factor
Tube cleanliness factor
(OP)
Colleagues;
On data sheet for a surface condenser I noticed that "tube cleanliness factor was included" = 85%.
Does it means that I need at least 85% of total cooling surface cleaned in order to perform according to design?
Thanks,
Corgas
On data sheet for a surface condenser I noticed that "tube cleanliness factor was included" = 85%.
Does it means that I need at least 85% of total cooling surface cleaned in order to perform according to design?
Thanks,
Corgas





RE: Tube cleanliness factor
The tube cleanliness factor is the ratio of the heat transfer coef compared to the clean value.
For Cu alloys 85% is real clean. In service it is common to see values down to 60%.
Stainless steels (and Ti) can usually manage 95% or better when they are new or freshly cleaned. They also can foul and end up down at 60% if the plant is careless.
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Plymouth Tube
RE: Tube cleanliness factor
What does HEI stand for?
RE: Tube cleanliness factor
http://www.heatexchange.org/
RE: Tube cleanliness factor
http://www.heatexchange.org/pub/steamsurface.htm
If you do any condenser work you must own a copy of this.
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Plymouth Tube
RE: Tube cleanliness factor
It is used in conjunction with other factors such as tube velocity factor unique to the HEI method.
rmw