Often times erosion, corrosion, and fouling by scale deposition are primary issues for geothermal-fluid-wetted process equipment. In particular, wet heat exchangers used in geothermal power plants must deal with scale deposition. Previously, a surface-coating of polytetrafluoroethylene (PTFE) was considered to provide a non-stick surface. However, intrinsically poor thermal conductivity of PTFE, along with its poor abrasion resistance and weak adhesion to metal substrate, turns out to be a serious concern for engineering use. In this paper, we report a fine-tuned nano-composite by incorporating PTFE/Carbon-nanotube (CNT) into the polyphenylene surfide (PPS) host matrix. PPS is a thermoplastic polymer exhibiting outstanding high-temperature stability, excellent flame resistance, and good chemical resistance. By adding PTFE/CNTs into a PPS matrix, a superhydrophobic surface can also be created by contemplating the chemical composition of the surface material and the cooperative effect of nano-micro structures at the surface. Furthermore, carefully engineered superhydrophobic surfaces can create so-called “dropwise condensation [1]” which can dramatically enhance steam condensation heat transfer. We report the performance results of such nanocomposites regarding steam condensation, along with other surface characteristics. It is our anticipation that, with proper treatment, PTFE/CNT blended PPS can be widely adopted for use in high performance heat exchangers in geothermal industries.
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ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 18–21, 2011
Scottsdale, Arizona, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-5471-6
PROCEEDINGS PAPER
Fine-Tuned Polymer Nano-Composite Coatings for Use in Geothermal Plants Available to Purchase
Kuok Cheng,
Kuok Cheng
University of Nevada, Reno, Reno, NV
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Eunsoo Yang,
Eunsoo Yang
University of Nevada, Reno, Reno, NV
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Chi Young Lee,
Chi Young Lee
Korea Atomic Energy Research Institute, Daejeon, S. Korea
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Zane Ricks,
Zane Ricks
University of Nevada, Reno, Reno, NV
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Viljar Palmre,
Viljar Palmre
University of Nevada, Reno, Reno, NV
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Kwang Kim
Kwang Kim
University of Nevada, Reno, Reno, NV
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Kuok Cheng
University of Nevada, Reno, Reno, NV
Eunsoo Yang
University of Nevada, Reno, Reno, NV
Chi Young Lee
Korea Atomic Energy Research Institute, Daejeon, S. Korea
Zane Ricks
University of Nevada, Reno, Reno, NV
Viljar Palmre
University of Nevada, Reno, Reno, NV
Kwang Kim
University of Nevada, Reno, Reno, NV
Paper No:
SMASIS2011-5012, pp. 713-719; 7 pages
Published Online:
February 7, 2012
Citation
Cheng, K, Yang, E, Lee, CY, Ricks, Z, Palmre, V, & Kim, K. "Fine-Tuned Polymer Nano-Composite Coatings for Use in Geothermal Plants." Proceedings of the ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2011 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1. Scottsdale, Arizona, USA. September 18–21, 2011. pp. 713-719. ASME. https://doi.org/10.1115/SMASIS2011-5012
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