A low cost, large area light soaking and testing station

Ogulgönen, Celal Güvenç
Kincai, Serkan
Test stations for accelerated aging tests are crucial in the development of commercial solar panel manufacturing technologies. Such test-beds must provide a reasonably uniform flux whose spectral distribution is an acceptable match to the solar spectrum. This work outlines the detailed design on a low cost test system based on metal-halide lamps that can deliver a simulated solar flux of up to 3 suns on a 100 cm by 100 cm square area with an intensity variation of around 15%. A total of 9 metal-halide lamps, each rated at 1000 W, is placed on top an enclosure which has a sample holding table whose distance to the lamps can be adjusted anywhere between 10 cm and 70 cm. A series of fans, blow ambient air over the panels being tested in order to maintain surface temperatures. The system is complemented by the necessary instrumentation to capture IV curves simultaneously for up to 8 solar devices. A model based design strategy is adopted during the construction of the test station in order to predict and optimize the light distribution as well as the thermal behaviour. Sample IV data from commercial thin film Si solar cells are reported to demonstrate the stability of operation. The cost of the entire system is below $ 20,000, with most of the budget going towards the data acquisition hardware. (C) 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim


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Pekoz, R.; Malcıoğlu, Osman Barış; Raty, J. -Y. (American Physical Society (APS), 2011-01-20)
Research for third generation solar cell technology has been driven by the need to overcome the efficiency and cost problems encountered by current crystalline Si- and thin-film-based solar cells. Using first-principles methods, Ge/Si and Si/Ge core/shell and Si-Ge layered nanowires are shown to possess the required qualities for an efficient use in photovoltaic applications. We investigate the details of their band structure, effective mass, absorption property, and charge-carrier localization. The strong ...
Aerothermodynamic Design Optimization of Hypersonic Vehicles
Eyi, Sinan; Boyd, Iain D. (American Institute of Aeronautics and Astronautics (AIAA), 2019-04-01)
The objective of this study is to develop a reliable and efficient design optimization method for hypersonic vehicles focused on aerothermodynamic environments. Considering the nature of hypersonic flight, a high-fidelity aerothermodynamic analysis code is used for the simulation of weakly ionized hypersonic flows in thermochemical nonequilibrium. A gradient-based method is implemented for optimization. Bezier or nonuniform rational basis spline curves are used to parametrize the geometry or the geometry ch...
A triple hybrid micropower generator with simultaneous multi-mode energy harvesting
ULUSAN, HASAN; CHAMANIAN, S.; PATHIRANA, W. P. M. R.; ZORLU, O.; MUHTAROGLU, A.; Külah, Haluk (IOP Publishing, 2018-01-01)
This study presents a triple hybrid energy harvesting system that combines harvested power from thermoelectric (TE), vibration-based electromagnetic (EM) and piezoelectric (PZT) harvesters into a single DC supply. A power management circuit is designed and implemented in 180 nm standard CMOS technology based on the distinct requirements of each harvester, and is terminated with a Schottky diode to avoid reverse current flow. The system topology hence supports simultaneous power generation and delivery from ...
Optimisation and design of PV modules for the application on bus roof-top and system integration for solar cooling
DEMİRCİOĞLU, Olgu; ES, FIRAT; Çiftpınar, Emine Hande; ZEYBEK, Akin; TUNCER, Cahit; Turan, Raşit (2015-09-18)
In this study, an external electrical cooling unit powered by PV modules was installed on the roof‐top of a bus to keep cooled interior atmosphere at a certain temperature level during the journey breaks. All solar cells used in this project were fabricated by Center for Solar Energy Research and Applications (GUNAM) and; then, integrated onto a bus roof together with MAN Turkey A.Ş. For integration of PV modules onto roof of bus, a reliable and commercially applicable method has been developed. Following i...
Account of nonlocal ionization by fast electrons in the fluid models of a direct current glow discharge
Rafatov, İsmail; KUDRYAVTSEV, A. A. (AIP Publishing, 2012-09-01)
We developed and tested a simple hybrid model for a glow discharge, which incorporates nonlocal ionization by fast electrons into the "simple" and "extended" fluid frameworks. Calculations have been performed for an argon gas. Comparison with the experimental data as well as with the hybrid (particle) and fluid modelling results demonstated good applicability of the proposed model. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4752419]
Citation Formats
C. G. Ogulgönen and S. Kincai, “A low cost, large area light soaking and testing station,” 2015, vol. 12, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/56389.