Parametric study of the small scale linear Fresnel reflector

Ionic Polymer-Metal Composite (IPMC) has been utilized as an actuator in several robotic applications such as the actuator for its locomotion and gripper of the end effector. However, due to its low actuation force which is normally less than 10gf (depend on dimension), the application has been limited to small scale robot. Hence, in this research we propose a multilayer structure of IPMC actuator and investigate the actuation force increment. Besides, parametric study was also conducted to determine the force-to-weight ratio and the bending displacement. The obtained results had been compared to single ply IPMC actuator at the same thickness. The result shows that the increment of IPMC layer had increased the actuating force up to 30% for two layers and 40% for three layers. In addition, utilizing multilayered IPMC had reduced the stiffness constraint for thicker IPMC. This finding would be useful in designing stage of a small scale robot that require higher actuation force at a higher bending displacement.

Download Full-text

Parametric Study of Eddy Current Brakes for Small-Scale Household Wind Turbine Systems

Energies ◽

10.3390/en14206633 ◽

2021 ◽

Vol 14 (20) ◽

pp. 6633

Author(s):

Huiseop Jeong ◽

Hoseong Ji ◽

Sanghyun Choi ◽

Joonho Baek

Keyword(s):

Wind Turbine ◽

Eddy Current ◽

Parametric Study ◽

Rotational Speed ◽

Magnetic Flux Density ◽

Small Scale ◽

Turbine Generator ◽

Disk Thickness ◽

Wind Turbine Generator ◽

Braking Torque

The design and application of eddy current brakes (ECBs) should be simple; further, ECBs should be used semi-permanently. This study aimed to determine major parameters for designing an ECB that can be applied to a small-scale wind turbine generator. To this end, an ECB was developed that could actuate without additional power, thus improving the efficiency of the generator. A series of simulations were conducted for a parametric study to pre-design ECBs suitable for small wind turbines. The six parameters chosen were disk thickness, number of magnets, radial location of magnets from center of disk, magnet pole arrangement, magnetic flux density, and rotational speed. The simulations were conducted on COMSOL Multiphysics. The results indicated that the number of magnets and magnet pole arrangements can significantly affect the performance curve of ECBs. Moreover, the disk thickness and rotational speed are linearly proportional to the braking torque.

Download Full-text

Experimental parametric study on low-frequency oscillating behaviour of pool fires in a small-scale mechanically-ventilated compartment

Journal of Physics Conference Series ◽

10.1088/1742-6596/1107/4/042021 ◽

2018 ◽

Vol 1107 ◽

pp. 042021

Author(s):

Maxime Mense ◽

Yannick Pizzo ◽

Hugues Pretrel ◽

Jean-Claude Loraud ◽

Bernard Porterie

Keyword(s):

Parametric Study ◽

Low Frequency ◽

Small Scale ◽

Pool Fires ◽

Mechanically Ventilated

Download Full-text

Parametric study of efficient small-scale axial and radial turbines for solar powered Brayton cycle application

Energy Conversion and Management ◽

10.1016/j.enconman.2016.09.060 ◽

2016 ◽

Vol 128 ◽

pp. 343-360 ◽

Cited By ~ 16

Author(s):

Ahmed M. Daabo ◽

Ayad Al Jubori ◽

Saad Mahmoud ◽

Raya K. Al-Dadah

Keyword(s):

Parametric Study ◽

Small Scale ◽

Brayton Cycle ◽

Solar Powered ◽

Radial Turbines

Download Full-text

Parametric study of exergetic efficiency of a small-scale cogeneration plant incorporating a heat pump

Applied Thermal Engineering ◽

10.1016/s1359-4311(02)00216-8 ◽

2003 ◽

Vol 23 (4) ◽

pp. 459-472 ◽

Cited By ~ 19

Author(s):

W. Malinowska ◽

L. Malinowski

Keyword(s):

Heat Pump ◽

Parametric Study ◽

Small Scale ◽

Cogeneration Plant ◽

Exergetic Efficiency

Download Full-text

Theoretical Deduction of the Optimum Tilt Angles for Small-Scale Linear Fresnel Reflectors

Energies ◽

10.3390/en14102883 ◽

2021 ◽

Vol 14 (10) ◽

pp. 2883

Author(s):

Arsenio Barbón ◽

Covadonga Bayón-Cueli ◽

José A. Fernández Rubiera ◽

Luis Bayón

Keyword(s):

Geographic Location ◽

Small Scale ◽

Brute Force ◽

Theoretical Justification ◽

Climate Zones ◽

Optimum Angle ◽

European Climate ◽

Reflector System ◽

Linear Fresnel Reflector

A theoretical justification and computation of the optimum values of the two longitudinal tilt angles of a small-scale linear Fresnel reflector is provided. The optimum angle of the mobile structure is proved to be half the latitude of the geographic location, while the optimum angle of the secondary reflector system is proved to be equal to that latitude. Brute-force verification is carried out for five EU cities, each in one of the five European climate zones.

Download Full-text