A5065845952- Innovative Energy Harvesting Technologies
- Vibration and Dynamic Analysis
- Fluid Dynamics and Vibration Analysis
- Advanced Sensor and Energy Harvesting Materials
- Vibration Control and Rheological Fluids
- Acoustic Wave Phenomena Research
- Energy Harvesting in Wireless Networks
- Advanced Materials and Mechanics
- Conducting polymers and applications
- Coagulation and Flocculation Studies
- Phase Change Materials Research
- Composite Structure Analysis and Optimization
- Adsorption and Cooling Systems
- Wind and Air Flow Studies
- Wireless Power Transfer Systems
- Pigment Synthesis and Properties
- Advanced MEMS and NEMS Technologies
Chinese University of Hong Kong
2021-2024
Sun Yat-sen University
2019-2020
This Letter explores the potential effect of implementing different surface protrusions on galloping energy harvesters. Three types protruded bluff bodies with rectangular, triangular, and elliptical metasurfaces are proposed, four kinds treatments deployed to vary their shape. Wind tunnel experiments reveal that adding can obviously change mode oscillations, only backward enhance response. Both simulations show have greatest harvesting performance. Specifically, a length 15 mm, maximum...
This Letter proposes a rotational energy harvester with hybrid piezoelectric and electromagnetic mechanisms dynamic bistability. It consists of stack force magnification frame two connected springs, coils inner impact stoppers. On the one hand, transduction is applied in gravity-based to enhance output. other bistability by utilizing centrifugal proposed improve low-frequency performances. Simulation experiments demonstrate that starts exhibit as frequency increased from zero subsequent...
This study investigated the corrosion behavior of stainless steel and pure metals in contact with ternary molten nitrate used for thermal energy storage(TES).Weight changes were measured over 500 hours steels, 20hs metals, products identified by scanning electron microscopy(SEM) X-ray diffraction(XRD).Our research shows that SS310S, SS316L SS321 all have good resistance to nitrates due their higher chromium nickel content.In addition, compared metal oxides, alloy oxides produced better...
As a kind of self-excited large amplitude vibration, galloping is detrimental to engineering structures. Therefore, how effectively suppress it has been crucial issue for both industry and academia. In this Letter, passive method based on integrating rectangular prismatic bluff bodies with different surface protrusions proposed mitigate galloping-induced vibrations. Both wind tunnel experiments numerical simulations prove the validity method. Moreover, computational fluid dynamics are also...
A narrow resonance bandwidth of an energy harvesters limits its response to the wide frequency spectrum in ambient environments. This work proposes addition a nonlinear restoring force applied triboelectric nanogenerator (TENG) tune and broaden bandwidth. is by permanent magnets at both sides slider two external magnets. The noncontact strategy adopted between grating electrodes avoid wear loss caused friction. results show that compared with linear system, TENG (NN-TENG) can increase peak...
Galloping energy harvesting has received great attention due to its simplicity in capturing flow energy. Shaping bluff bodies with different surface protrusions been proven obviously alter the amplitude and mode of oscillations, only leeward can enhance galloping vibration amplitude. This paper mainly focuses on determining optimal lengths rectangular, triangular, elliptical protrusions. An electromechanical mathematical model was established based extended Hamilton's principle Euler-...
Molten salt-based nanofluids have better thermal properties than pure molten salt due to dispersing nanoparticles.However, the aggregation of nanoparticle can waken heat transfer.In this paper, Kinetic Monte Carlo simulations based on classical DLVO theory were carried out predict MgO size distribution suspending in NaNO3 with different initial particle diameters.The result suggests that nanoparticles 10nm~30nm tend form clusters and larger diameters such as 40nm 50nm could lead a more...