نتایج جستجو برای: solar system modeling

تعداد نتایج: 2612131  

1997
Zhanqing Li Albert Arking

Solar energy reaching our planet is partly reflected to space, partly absorbed in the atmosphere, and partly absorbed at the earth’s surface. This partitioning of the solar energy incident at the top of the atmosphere (TOA), hereafter called solar energy disposition (SED), is determined by the optical properties of the atmospheric column, which, in turn, is influenced by the SED. The key variab...

2013
Mark T. Winkler Casandra R. Cox Daniel G. Nocera Tonio Buonassisi

We describe a framework for efficiently coupling the power output of a series-connected string of single-band-gap solar cells to an electrochemical process that produces storable fuels. We identify the fundamental efficiency limitations that arise from using solar cells with a single band gap, an arrangement that describes the use of currently economic solar cell technologies such as Si or CdTe...

2013
G. Formetta R. Rigon J. L. Chávez O. David

This paper presents two new modeling components based on the object modeling system v3 (OMS3) for the calculation of the shortwave incident radiation (Rsw ↓) on complex topography settings, and the implementation of several ancillary tools. The first component, NewAGE-SwRB, accounts for elevation slope, aspect, shadow of the sites, and uses suitable parameterization for obtaining the cloudless ...

ژورنال: انرژی ایران 2020

One of the methods for increasing the gain in the photovoltaic systems is using the solar tracker system which during the whole of day, align the solar panels in the proper position with respect to the sun position. In this study, a solar tracker in the form of smart light curtain was designed and prepared. This simple and smart tracker detects the direction of the sun radiation by using three ...

2000
Michael Barnett Thomas Keating Sasha A. Barab Kenneth E. Hay

In this study we assessed the growth of university students' conceptual understanding of the seasons of the Earth, and eclipses and phases of the Moon upon completing a threedimensional (3-D) modeling-based Introduction to Astronomy course. Interviews prior to the course identified a range of student alternative frameworks regarding the composition and mechanics of the Solar System. During the ...

2012
Qi Zhang Susan W. Stewart Lucas T. Witmer

Solar thermal water heating systems reduce household energy bills by using the free solar radiation provided by the sun to heat water for residential needs. In order to eliminate the need for electricity to run a pump to drive the fluid circulation in these systems, fluid buoyancy effects can be employed to move the fluid from lower elevations to higher elevations. There are several operational...

Journal: :ماشین های کشاورزی 0
مسعود محمدی ساردوئی حمید مرتضی پور کاظم جعفری نعیمی

introduction electrical performance of solar cells decreases with increasing cell temperature, basically because of growth of the internal charge carrier recombination rates, caused by increased carrier concentrations. hybrid photovoltaic/thermal (pvt) systems produce electrical and thermal energy simultaneously. pvt solar collectors convert the heat generated in the solar cells to low temperat...

2017
Heejin Cho Aaron Smith Rogelio Luck Pedro J. Mago

Complex, dynamic, computational models are routinely used to evaluate and optimize the design and performance of solar thermal systems. As models become more complex, performing uncertainty analysis on such models can be quite challenging and computationally expensive. This paper presents an effective approach to quantify uncertainties associated with transient simulation results from a dynamic...

2012
Matthew J. Reno

As the amount of solar energy on the distribution grows, a quick and easy simulation method is needed to model the impact of solar energy and to help distribution planners perform the necessary interconnection studies. This paper demonstrates the functionality and methods of a prototype software that models the variable nature of the distribution system load and solar energy throughout the year...

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