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Retardation of heat exchanger surfaces mineral fouling by water-based diethylenetriamine pentaacetate-treated CNT nanofluids

Teng, KH and Amiri, A and Kazi, SN and Bakar, MA and Chew, BT and Al-Shamma'a, A and Shaw, A (2017) Retardation of heat exchanger surfaces mineral fouling by water-based diethylenetriamine pentaacetate-treated CNT nanofluids. Applied Thermal Engineering, 110. pp. 495-503. ISSN 1359-4311

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Abstract

Mineral scale deposition on heat exchanging surfaces increases the thermal resistance and reduces the operating service life. The effect is usually intensified at higher temperatures due to the inverse temperature solubility characteristics of some minerals in the cooling water. Scale formation build up when dissolved salt crystallize from solution onto the heated surface, forming an adherent deposit. It is very important for heat transfer applications to cope with the fouling problems in industry. In this present study, a set of fouling experiments was conducted to evaluate the mitigation of calcium carbonate scaling by applying DTPA-treated MWCNT-based water nanofluids on heat exchanger surfaces. Investigation of additive DTPA-treated MWCNT-based water nanofluids (benign to the environment) on fouling rate of deposition was performed. 300 mg L−1 of artificially-hardened calcium carbonate solution was prepared as a fouling solution for deposit analysis. Assessment of the deposition of calcium carbonate on the heat exchanger surface with respect to the inhibition of crystal growth was conducted by Scanning Electron Microscope (SEM). The results showed that the formation of calcium carbonate crystals can be retarded significantly by adding MWCNT-DTPA additives as inhibition in the solution.

Item Type: Article
Uncontrolled Keywords: 0913 Mechanical Engineering, 0915 Interdisciplinary Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Built Environment
Civil Engineering
General Engineering Research Institute
Publisher: Elsevier
Related URLs:
Date Deposited: 28 Apr 2017 08:54
Last Modified: 28 Apr 2017 08:54
DOI or Identification number: 10.1016/j.applthermaleng.2016.08.181
URI: http://researchonline.ljmu.ac.uk/id/eprint/6314

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