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The performance of the hybrid structures PV/TEG/STC which consist of photovoltaic cells PV, thermoelectric elements TEG and solar collector STC is studied in this paper function of different levels of illumination from 30 suns to 130 suns (1 sun = 1000 W/m2). The concentrated light is obtained using a solar simulator with four parabolic xenon lamps and an optical mixer to ensure the quasi homogenous...
This paper presents the design of a system for studying photovoltaic cells PV, thermoelectric generators TEG, a solar collector SC and different hybrid structures comprising two or three of them in concentrated light. The concentrated light is obtained using a Fresnel lens and a sun tracker. The advantages of the system are: the reduction of the photovoltaic cells area, the use of the photovoltaic...
This work describes the technical details of a novel methodology which enables the parallel deployment and execution of hardware applications onto the same FPGA chip using dynamic partial reconfiguration. Our approach, which makes use of the PCAP (Processor Configuration Access Port) available on the latest generation of Xilinx Zynq Systems-on-Chip, allows the processing system to operate a fast partial...
This paper describes a solution to implement simulated and hands-on laboratories for studying the photovoltaic cells. The proposed solution is based on the Graphical System Design approach that combines graphical developing software (NI Multisim and NI LabVIEW) and flexible commercial off-the-shelf hardware (NI ELVIS II) in order to reduce the developing time. The solution can also be easily implemented...
There are many studies in the literature related to the introduction in the engineering curricula of simulated laboratories and, more recently, of remote laboratories to extend the area of applications, nowadays limited by the labs endowment and to use creatively the advantages of e-learning. The paper aims to present a solution for the experiments related to the solar cells field. The presented solution...
The photovoltaic cell parameters are very important for researchers and manufacturers to improve the efficiency of these devices. There are many studies for these parameters in sunlight at one sun or at some suns, but few studies at hundreds or thousands suns. In this paper is presented the study of all important parameters of three types of photovoltaic cells under concentrated sunlight.
The most important and accessible methods to determine the series resistance Rs and the ideality factor of the diode, m, for the solar cell are presented in this paper. The values of the two parameters obtained for a monocrystalline silicon solar cell with an area of 9cm2 are also presented comparatively. The measurements were realized using the NI ELVIS platform and the Solar Lab board, developed...
Interpreting the current- voltage I-V characteristic of the solar cells gives important information about functional parameters. The paper presents a comparison between the most important techniques of raising the I-V characteristic for solar cells. The improvement realized for raising the characteristic using a capacitor as a load resistance is also presented. A new method to determine the series...
This paper introduces the concept of a Wi-Fi tag that can be used as an extension of the iLab remote laboratory framework. A Wi-Fi tag has been built by Tag4M of Austin, TX, USA, with the purpose of connecting sensors to the Internet where data is displayed using Web Pages that are posted and can be accessed from anywhere in the world. The Tag4M Wi-Fi tag is tiny and low cost works on battery power,...
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