CaCO3 scaling in AISI 316 stainless steel tubes – effect of thermal and hydraulic parameters on the induction time and growth rate |
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Authors: | M O Budair M S Khan S M Zubair A K Sheikh A Quddus |
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Institution: | (1) Department of Mechanical Engineering King Fahd University of Petroleum and Minerals Dhahran 31261, Saudi Arabia, SA;(2) Research Institute King Fahd University of Petroleum and Minerals Dhahran 31261, Saudi Arabia, SA |
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Abstract: | Calcium Carbonate (CaCO3) is predominantly present in cooling water which is commonly used as a coolant in many industrial processes. It has inverse
solubility characteristics i.e., it is less soluble in warm water, resulting in the deposition of scale on heat transfer surfaces.
An experimental study was carried out to determine the effect of tube surface temperature, Reynolds number, tube diameter
and salt concentration on the induction time of CaCO3 scaling. It was observed that tube surface temperature, Reynolds number and tube diameter had no effect on the onset time
of scaling, whereas salt concentration and tube surface roughness had a profound influence on the induction period. The data
collected from the experiments were used to develop dimensionless fouling resistance models for estimation and prediction
purposes.
Received on 22 December 1997 |
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