University of Hawaii at Manoa – Page 2

Clean Production of Bioplastic and Bio-oil from Solar Energy and Carbon Dioxide

Yu J., University of Hawaii at Manoa, US

Producing fuels and materials from solar energy and CO2 is a clean sustainable solution to the arising fossil energy consumption and CO2 emission. This paper presents a high intensity process that can run continuously at [...]

Dynamic Model Refinement for Buoyant Energy Storage Technology

Thornbrue T.B., Ghorbani R., University of Hawaii at Manoa, US

As the use of renewable electricity grows, energy storage is becoming a better solution to grid destabilization challenges associated with resource intermittency. With cost being a key barrier to widespread adoption, buoyant energy storage technology [...]

Dynamic Model Refinement for Buoyant Energy Storage Technology

Thornbrue T.B., Ghorbani R., University of Hawaii at Manoa, US

As the use of renewable electricity grows, energy storage is becoming a better solution to grid destabilization challenges associated with resource intermittency. With cost being a key barrier to widespread adoption, buoyant energy storage technology [...]

Low-cost 3D Wind Anemometers for Architectural Wind Modeling and Prediction

Hirano J., Garmire D., University of Hawaii at Manoa, US

As wind power generation becomes more popular especially in urban areas, it becomes important to understand wind flow on a small scale accounting for the effects of building topology and neighboring buildings for wind-energy availability. [...]

Experimental study of solar spectrum impact on solar cells

Song X., Miller E.L., Garmire D., University of Hawaii at Manoa, US

Variations in solar spectrum can lead to changes in the performance and efficiency of solar cells, which operate at peak efficiency only over a relatively narrow band of the spectrum. Similarly heat absorbed by solar [...]

Experimental study of solar spectrum impact on solar cells

Song X., Miller E.L., Garmire D., University of Hawaii at Manoa, US

Variations in solar spectrum can lead to changes in the performance and efficiency of solar cells, which operate at peak efficiency only over a relatively narrow band of the spectrum. Similarly heat absorbed by solar [...]

Development of Nanostructures, Nanodevices, Nanocomposites, and Hierarchical Nanocomposites at Hawaii Nanotechnology Laboratory

Ghasemi-Nejhad M., Cao A., University of Hawaii at Manoa, US

This paper presents activities related to the development of nanostructures, nanodevices, nanocomposites, and hierarchical nanocomposites at the Hawaii Nanotechnology Laboratory of the Department of Mechanical Engineering of the University of Hawaii at Manoa. On nanostructures, [...]

Closed form Exact Analytical Solutions for Effective Mechanical Properties and Responses for Nanotube Reinforced Nanocomposites

Askari D., Ghasemi-Nejhad M., University of Hawaii at Manoa, US

In this paper, analytical and numerical approaches are employed to investigate the effective axial mechanical properties and mechanical behavior of a three-phase composite cylindrical model, representing a unit cell for a polymer nanocomposite reinforced by [...]

Topics in Finite-Element Modeling of Piezoelectric MEMS Devices

von Preissig F.J., Kim E.S., University of Hawaii at Manoa, US

Techniques for modeling thin-piezoelectric MEMS devices using existing finite-element packages are examined. The emphasis is on non-resonant sensors and actuators, but most results are applicable to resonant devices and large structures as well. Characteristic features [...]