Canadian Society for Mechanical Engineering (CSME) International Congress

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The Canadian Society for Mechanical Engineering (CSME) International Congress promotes the communication and transfer of technology among industry, government agencies, universities and R&D laboratories. The CSME Congress offers a platform for national and international Mechanical Engineering experts to meet, exchange information, discuss recent research challenges, and explore problems of practical importance to the profession and its related fields.

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Open Access
Droplet Impact, Spreading and Freezing on Metallic Surfaces of varying Wettability
(CSME-SCGM, May-18) Pan, Yuntao; Shi, Kewei; Duan, Xili; Naterer, Greg
Ice formation and accumulation can lead to operational failure and risks for structures, including power transmission lines, aircraft, offshore platforms, marine vessels, and wind turbines. Liquid repellent and icephobic surfaces can reduce ice accretion and improve asset integrity and safety in harsh environments. There are significant needs to probe how wettability affects the droplet impact, ice nucleation and ice accretion processes on different kinds of micro-structured surfaces. This paper presents experimental results of droplet impact, icing delay time and ice accumulation on metallic surfaces with varying wettability. Several different designs of the hydrophobic surfaces are considered. A commercial hydrophobic coating is also used to enhance liquid repellent features and reduce ice accumulation. The results demonstrated that when the static contact angle increases, the total icing time increases, suggesting desirable icing delays. The total icing time decreases with lower surface temperature, higher impact velocity or smaller droplet diameter.
Open Access
Experimental Investigation of Ice Accretion on Horizontal Axis Wind Turbines
(CSME-SCGM, May-18) Elhajare, Mustafa; Pope, Kevin; Duan, Xili
In this paper, ice accretion on a wind turbine blade with a NACA 63415 airfoil is investigated with experimental techniques. Several different angles of attack, from 0° to 90°, and wind velocities, 3 m/s, 4 m/s and 5 m/s are studied. Tests are conducted in a climatic wind chamber with a fan and two spray nozzles. The largest quantity of ice accumulation on the blade was 7.2 kg, at an angle of attack of 90°. The results of this paper provide valuable new experimental data for ice accretion on wind turbine blades.
Open Access
Feasibility Study of Synthetic Oil Based Nanofluids for Use in Thermal Oil Heaters
(CSME-SCGM, May-18) Mullett, Ian; Duan, Xili; Wang, Zongming; Li, Yishan
Thermal oil heaters can be considered as an alternative to steam boilers for process heating use. Instead of boiling water, thermal oil heaters use heat transfer oils with high boiling points which allows operation at low pressures. To increase thermal oil heater efficiency, a nanofluid consisting of a common heat transfer oil, the synthetic TH66, and copper nanoparticles has been proposed. Based on existing correlations for nanofluids, a figure of merit (FOM) was created to evaluate heat transfer performance while factoring in pumping power increases. A maximum FOM increase of 13% was found for a thermal oil heater using the nanofluid when compared to one that uses the base fluid oil.
Open Access
Preparation and Properties of Nanoparticle-enhanced Composite Phase Change Material with Ceramic Porous Media
(CSME-SCGM, May-18) Li, Runfeng; Zhou, Yang; Duan, Xili
Nanoparticle-enhanced tailing-paraffin composite phase change material (NCPCM) is fabricated by spontaneous melt infiltration. Industrial waste-iron tailing is used as raw material to prepare ceramic porous carrier with a foam-gel casting method. By adjusting the fabrication parameters, optimal NCPCM properties are obtained with paraffin content of 70%~88% and thermal conductivity of 0.351~0.490 W/(m·K), which is nearly 200% the thermal conductivity of paraffin wax. After 25 melting/solidification cycles, the nanoparticles remain well dispersion with overall stability in the composite phase change material, and the thermal conductivity slightly decreased from 0.349 to 0.317 W/ m·K. With multiple melting and solidification cycles, a low weight loss of 2.3~7.8 wt.% is demonstrated. The strength of ceramic frame is found to have a direct effect on the weight loss. Compared with exisiting nanoparticle-enhanced phase change material, the new NCPCM shows significantly improved thermal conductivity and better nanoparticle stability due to its ability to prevent nanoparticles from disposition.

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Browsing Canadian Society for Mechanical Engineering (CSME) International Congress by Author "3a45edbefba69e878df740741391b37c"

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