Spectral effects on the energy yield of various photovoltaic technologies in Lima (Peru)

This paper compares thin film photovoltaic technologies’ productivity for different installation sites and surface positions. The aim is to guide architects to increase the energy yield during the design of buildings with integrated photovoltaic panels by providing information on the appropriate inclination and orientation of the panels. Meteorological data from ten sites from the Equator to the Arctic Circle are used. Two types of input solar radiation (extraterrestrial and real) are referenced, from horizontal to an arbitrary oriented surface, and are introduced in Durisch’s model to estimate the energy production for various surface inclinations and orientations. Thus 3D surfaces are obtained which allows the architects to choose an appropriate compromise between the aesthetic and the practical.

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Optimizing genotype-environment-management interactions to ensure silage maize production in the Chinese Maize Belt

Climate Research ◽

10.3354/cr01599 ◽

2020 ◽

Vol 80 (2) ◽

pp. 133-146

Author(s):

L Zhang ◽

Z Zhang ◽

J Cao ◽

Y Luo ◽

Z Li

Keyword(s):

Field Experiments ◽

Weather Conditions ◽

Growth Cycle ◽

High Energy ◽

Risk Level ◽

Energy Yield ◽

Maize Production ◽

Early Date ◽

Environment Management ◽

Silage Maize

Grain maize production exceeds the demand for grain maize in China. Methods for harvesting good-quality silage maize urgently need a theoretical basis and reference data in order to ensure its benefits to farmers. However, research on silage maize is limited, and very few studies have focused on its energetic value and quality. Here, we calibrated the CERES-Maize model for 24 cultivars with 93 field experiments and then performed a long-term (1980-2017) simulation to optimize genotype-environment-management (G-E-M) interactions in the 4 main agroecological zones across China. We found that CERES-Maize could reproduce the growth and development of maize well under various management and weather conditions with a phenology bias of <5 d and biomass relative root mean square error values of <5%. The simulated results showed that sowing long-growth-cycle cultivars approximately 10 d in advance could yield good-quality silage. The optimal sowing dates (from late May to July) and harvest dates (from early October to mid-November) gradually became later from north to south. A high-energy yield was expected when sowing at an early date and/or with late-maturing cultivars. We found that Northeast China and the North China Plain were potential silage maize growing areas, although these areas experienced a medium or even high frost risk. Southwestern maize experienced a low risk level, but the low soil fertility limited the attainable yield. The results of this paper provide information for designing an optimal G×E×M strategy to ensure silage maize production in the Chinese Maize Belt.

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Caffeine mouth rinse has no effects on anaerobic energy yield during a Wingate Test

The Journal of Sports Medicine and Physical Fitness ◽

10.23736/s0022-4707.19.09928-6 ◽

2020 ◽

Vol 60 (1) ◽

Author(s):

Alisson H. Marinho ◽

Eduardo V. Mendes ◽

Rubens A. Vilela ◽

Victor J. Bastos-Silva ◽

Gustavo G. Araujo ◽

...

Keyword(s):

Wingate Test ◽

Energy Yield ◽

Mouth Rinse ◽

Anaerobic Energy

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Quality Evaluation Techniques of Solar Cell Module

ISTFA 2010: Conference Proceedings from the 36th International Symposium for Testing and Failure Analysis ◽

10.31399/asm.cp.istfa2010p0143 ◽

2010 ◽

Author(s):

Daisuke Murahara ◽

Wataru Shimizu ◽

Hidehisa Kubota ◽

Tamiko Oda ◽

Kazuhiro Yabe

Keyword(s):

Solar Cell ◽

Process Diagnostics ◽

Photovoltaic Energy ◽

Module Selection ◽

Cell Modules ◽

Diagnostics System ◽

Photovoltaic Technologies ◽

Evaluation Techniques

Abstract We have developed a process diagnostics system for photovoltaic energy modules based on standard methods and practices already developed for LSI and MEMS technologies. This paper provides a description of methods used to ensure the conformation of solar cell modules to the rigors of high-quality manufacturing necessary for reliable photovoltaic energy production when exposed to long-term environmental use. We have verified the possibility of inspecting each solar cell and the module assembly in detail for several photovoltaic technologies, specifically monocrystalline Si, polycrystalline Si, and CuInxGa1-xSe2 An objective set of criteria for the quality of each module can be provided by this method for use in module selection by consumers. Moreover, the quality of conformance and reliability data can be used as feedback to the manufacturer to minimize the number of defects created during manufacturing process and ameliorate their effects.

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Performance Improvements in Flexible Photovoltaic Technologies for Military Technology

10.21236/ada574530 ◽

2012 ◽

Author(s):

Steven Braymen ◽

Frank Jeffrey ◽

Dan Stieler ◽

Kelly Junge ◽

Jason Hauschildt

Keyword(s):

Military Technology ◽

Performance Improvements ◽

Photovoltaic Technologies

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Overview of photovoltaic technologies

10.2172/1216665 ◽

2009 ◽

Author(s):

Not Given Author

Keyword(s):

Photovoltaic Technologies

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Reconfigurable Distributed Power Electronics Technique for Solar PV Systems

Electronics ◽

10.3390/electronics10091121 ◽

2021 ◽

Vol 10 (9) ◽

pp. 1121

Author(s):

Kamran Ali Khan Niazi ◽

Yongheng Yang ◽

Tamas Kerekes ◽

Dezso Sera

Keyword(s):

Energy Yield ◽

Solar Pv ◽

Charge Redistribution ◽

Pv System ◽

Partial Shading ◽

Pv Systems ◽

Simulation Based ◽

In Series ◽

A Cell ◽

Power Balancing

A reconfiguration technique using a switched-capacitor (SC)-based voltage equalizer differential power processing (DPP) concept is proposed in this paper for photovoltaic (PV) systems at a cell/subpanel/panel-level. The proposed active diffusion charge redistribution (ADCR) architecture increases the energy yield during mismatch and adds a voltage boosting capability to the PV system under no mismatch by connected the available PV cells/panels in series. The technique performs a reconfiguration by measuring the PV cell/panel voltages and their irradiances. The power balancing is achieved by charge redistribution through SC under mismatch conditions, e.g., partial shading. Moreover, PV cells/panels remain in series under no mismatch. Overall, this paper analyzes, simulates, and evaluates the effectiveness of the proposed DPP architecture through a simulation-based model prepared in PSIM. Additionally, the effectiveness is also demonstrated by comparing it with existing conventional DPP and traditional bypass diode architecture.

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Energy Yield and Clipping Loss Corrections for Hourly Inputs in Climates with Solar Variability

2020 47th IEEE Photovoltaic Specialists Conference (PVSC) ◽

10.1109/pvsc45281.2020.9300911 ◽

2020 ◽

Author(s):

Rounak Kharait ◽

Simran Raju ◽

Abhishek Parikh ◽

Mark A. Mikofski ◽

Jeff Newmiller

Keyword(s):

Solar Variability ◽

Energy Yield

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Maize intercropping in the milpa system. Diversity, extent and importance for nutritional security in the Western Highlands of Guatemala

Scientific Reports ◽

10.1038/s41598-021-82784-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Santiago Lopez-Ridaura ◽

Luis Barba-Escoto ◽

Cristian A. Reyna-Ramirez ◽

Carlos Sum ◽

Natalia Palacios-Rojas ◽

...

Keyword(s):

Quantitative Analysis ◽

Farm Households ◽

Small Scale ◽

Agricultural System ◽

Energy Yield ◽

Common Beans ◽

Nutritional Security ◽

Nutrient Adequacy ◽

Faba Beans ◽

Total Productivity

AbstractWe present an assessment of the extent, diversity, and nutritional contribution of the milpa through a quantitative analysis of data from a survey conducted in 989 small scale farm households in the Western Highlands of Guatemala (WHG). The milpa is a traditional agricultural system in which maize is intercropped with other species, such as common beans, faba beans, squashes or potatoes. Our study shows that more than two-thirds of the 1,205 plots recorded were under the milpa system, with a great diversity of crop combinations. As shown with the 357 plots for which specific yields were available, milpa systems present higher total productivity than monocropped maize, expressed as total energy yield of the harvested crops in the respective system, and were also better at providing the recommended daily allowances of fourteen essential nutrients, based on a Potential Nutrient Adequacy (PNA) indicator. Maize-bean-potato, maize-potato, and maize-bean-faba intercrops had the highest PNAs, and monocropped maize, the lowest. These results support the implementation of milpa systems tailored to different agro-ecologies in order to improve nutrition in the WHG and a variety of similar regions.

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