Numerical investigation of the natural air-cooling of photovoltaic modules in a new concept of hybrid system PVT mounted in stairs form (S-PVT)

2018 ◽  
Author(s):  
L. Boutina ◽  
M. Lebbi ◽  
K. Touafek ◽  
A. Khelifa ◽  
A. Benchatti
Keyword(s):  
Numerical Investigation ◽  
Hybrid System ◽  
Air Cooling ◽  
Photovoltaic Modules

Design and implementation of a directly cooled PV/T

2015 ◽  
Vol 13 (3) ◽  
pp. 369-379
Author(s):  
Busiso Mtunzi ◽  
Edson L. Meyer
Keyword(s):  
Hybrid System ◽  
Design Methodology ◽  
Air Cooling ◽  
Water Cooling ◽  
Content Type ◽  
Water Ingress ◽  
Design And Implementation ◽  
Pv Module ◽  
Pv Modules ◽  
Practical Implications

Purpose – The purpose of this paper is to design and implement a directly cooled photovoltaic thermal (PV/T) hybrid system. Design/methodology/approach – The research design subjects, instruments and methods that were used to collect data are as detailed in the paper. Two polycrystalline photovoltaic (PV) modules were used in this study. Findings – The directly water-cooled PV module (PV/T) was found to operate better as compared to a naturally cooled module for the first three months. The PV/T initially operated at a higher electrical efficiency for 87 per cent of the day. The monthly energy-saving efficiency of the PV/T was found to be approximately 61 per cent, while the solar utilisation of the naturally cooled PV module M1 was found to be 8.79 per cent and that of M2 was 47.93 per cent. Research limitations/implications – The major limitation was the continued drop in efficiency after the first three months of the PV/T placed outdoors. The fall in the efficiency was attributed to water ingress. Practical implications – Direct water cooling of PV modules is possible, only that a better sealing is needed to prevent water ingress. Originality/value – PV air cooling has been researched on. Use of water as a cooling medium has been carried out using serpentine pipes or riser tube, and no direct water cooling on the back of the module has been researched on.

Numerical investigation of effects of “baffles - deceleration strip” hybrid system on rock avalanches

2019 ◽  
Vol 16 (2) ◽  
pp. 414-427 ◽  
Author(s):  
Yu-zhang Bi ◽  
Si-ming He ◽  
Yan-jun Du ◽  
Jie Shan ◽  
Shuai-xing Yan ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Hybrid System ◽  
Rock Avalanches
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