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In the Research Center (CINVESTAV), located north Mexico City was evaluated a 60 kWp photovoltaic (PV) system. The PV system energy performance ratio (PR) is reported together with the measured solar irradiation, ambient and PV module temperatures for three years. A finally calculated average PR was 86.8% for the 36 months. The average daily energy produced by the PV system during 3 years was 260...
In the Research Center (CINVESTAV), located north Mexico City was evaluated 60 kWp photovoltaic (PV) system. The PV system energy performance ratio, so called “quality factor” are reported together with the measured solar irradiation, ambient and PV module temperatures. Quality factor defines the overall system performance with respect to the energy production, solar resource, and total effect of...
Methods for reducing surface reflectance in crystalline-silicon (c-Si) based solar cells is briefly reviewed. In general, an antireflection coating (ARC) is designed for normal light incidence, which consists of a single quarter-wavelength (λ/4) layer with a proper optical transparency. Theoretical and experimental comparisons were carried out for both, single and double ARC using silicon nitride...
Electronic services (mail, web, etc.) can operate, at present over wireless networks. 802.11 networks are an example, where wireless devices use its resources to access to networks and services and in particular to Internet. The security mechanisms in the MAC layer are added to existing security mechanisms in other layers of the TCP/IP model, and therefore it generates multiple encryption of information...
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