An apparatus for studying formation of calcium carbonate scale on polymer tubes

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An apparatus was designed to study scaling of polypropylene and copper tubes during continuous exposure to mildly supersaturated tap water for six weeks. The mild supersaturation (S∼4) is at the high end of the range of supersaturations found in potable water in the US and is a departure from the common practice of testing under accelerated, high supersaturation conditions. In addition to creating conditions closer to practice, low supersaturation conditions are also expected to make the surface chemistry of the tube a controlling factor in the scaling process, and may possibly reveal differences between polymers and metals. The apparatus employs a continuous flow of tap water with in-line injection of chemicals to adjust and control supersaturation, and an in-line heater to boost the temperature of the water to 40°C. The higher temperature enhances the kinetics of the scaling process without severely affecting the thermodynamic surface parameters that affect scale nucleation. Multiple tubes are exposed simultaneously. Test results show that the apparatus operates with stable flow rates, calcium ion concentration and temperature, indicating that it is ready for long term experiments.

Original languageEnglish (US)
Title of host publicationAmerican Solar Energy Society - Solar 2006
Subtitle of host publication35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference
Pages136-141
Number of pages6
StatePublished - Dec 1 2006
EventSolar 2006: Renewable Energy - Key to Climate Recovery, Including 35th ASES Annual Conference, 31st ASES National Passive Solar Conference, 1st ASES Policy and Marketing Conference and ASME Solar Energy Division International Solar Energy Conference - Denver, CO, United States
Duration: Jul 9 2006Jul 13 2006

Publication series

NameAmerican Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference
Volume1

Other

OtherSolar 2006: Renewable Energy - Key to Climate Recovery, Including 35th ASES Annual Conference, 31st ASES National Passive Solar Conference, 1st ASES Policy and Marketing Conference and ASME Solar Energy Division International Solar Energy Conference
CountryUnited States
CityDenver, CO
Period7/9/067/13/06

Fingerprint

Supersaturation
Calcium carbonate
Polymers
Water
Surface chemistry
Potable water
Temperature
Polypropylenes
Calcium
Nucleation
Flow rate
Thermodynamics
Copper
Kinetics
Ions
Testing
Metals
Experiments

Cite this

Wu, Z., Francis, L., & Davidson, J. H. (2006). An apparatus for studying formation of calcium carbonate scale on polymer tubes. In American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference (pp. 136-141). (American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference; Vol. 1).

An apparatus for studying formation of calcium carbonate scale on polymer tubes. / Wu, Zhen; Francis, Lorraine; Davidson, Jane H.

American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference. 2006. p. 136-141 (American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference; Vol. 1).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wu, Z, Francis, L & Davidson, JH 2006, An apparatus for studying formation of calcium carbonate scale on polymer tubes. in American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference. American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference, vol. 1, pp. 136-141, Solar 2006: Renewable Energy - Key to Climate Recovery, Including 35th ASES Annual Conference, 31st ASES National Passive Solar Conference, 1st ASES Policy and Marketing Conference and ASME Solar Energy Division International Solar Energy Conference, Denver, CO, United States, 7/9/06.
Wu Z, Francis L, Davidson JH. An apparatus for studying formation of calcium carbonate scale on polymer tubes. In American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference. 2006. p. 136-141. (American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference).
Wu, Zhen ; Francis, Lorraine ; Davidson, Jane H. / An apparatus for studying formation of calcium carbonate scale on polymer tubes. American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference. 2006. pp. 136-141 (American Solar Energy Society - Solar 2006: 35th ASES Annual Conf., 31st ASES National Passive Solar Conf., 1st ASES Policy and Marketing Conf., ASME Solar Energy Division Int. Solar Energy Conference).
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