Two degrees of freedom parallel linkageto track solarthermal platforms installed on ships

7th International Conference on Advanced Concepts in Mechanical Engineering

Visa, I.^1 ; Cotorcea, A.^1,2 ; Moldovan, M.^1 ; Neagoe, M.^1

Renewable Energy Systems and Recycling Research Centre, Transilvania University of Brasov, Romania^1

Department of Naval and Port Engineering and Management, Mirceacel Batran Naval Academy, Romania^2

关键词: Conventional fuel;    Electric energies;    Multi Body Systems;    Navigation conditions;    Photovoltaic systems;    Solar tracking systems;    Total energy consumption;    Two degrees of freedom;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/147/1/012071/pdf
DOI  :  10.1088/1757-899X/147/1/012071

来源: IOP

【 摘 要 】

Transportation is responsible at global level for one third of the total energy consumption. Solutions to reduce conventional fuel consumption are under research, to improve the systems' efficiency and to replace the current fossil fuels. There already are several applications, usually onsmall maritime vehicles, using photovoltaic systems to cover the electric energy demand on-board andto support the owners' commitment towards sustainability. In most cases, these systems are fixed, parallely aligned with the deck; thus, the amount of solar energy received is heavily reduced (down to 50%) as compared to the available irradiance. Large scale, feasible applications require to maximize the energy output of the solar convertors implemented on ships; using solar tracking systems is an obvious path, allowing a gain up to 3540% in the output energy, as compared to fixed systems. Spatial limitations, continuous movement of the ship and harsh navigation condition are the main barriers in implementation. This paper proposes a solar tracking system with two degrees of freedom, for a solar thermal platform, based on a parallel linkage with sphericaljoints, considered as Multibody System. The analytical model for mobile platform position, pressure angles and a numerical example are given in the paper.