solar radiation Articles
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Correlation model of hourly diffuse solar radiation based on ASHRAE model: a study case in India
Measurements of diffuse and global solar radiation carried out from January 2001 to December 2005 at Ahmedabad, Mumbai, Calcutta, Chennai and Pune cities of India, representing varying weather conditions of the entire country, have been used to develop the correlation model for the estimating hourly values of diffuse solar radiation on horizontal surface. The comparisons of the present estimated ...
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Exergy of solar radiation
Solar radiation reaching the ground is accompanied with radiation entropy. When the entropy production rate within any solar energy conversion device is to be calculated, the incoming radiation entropy flux has to be known. In this contribution, first it is shown how the radiation entropy flux arriving on earth is to be calculated. Secondly, the interaction between the incoming radiation and the ...
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A new type of solar concentrator employing a cone-cylinder combination
Most conventional solar thermal radiation concentrators have some sort of symmetry which allows them to concentrate solar thermal energy for their operation. We report a new system that utilises the symmetry of a cone and a cylinder combination to simulate the concentration of solar radiation on a ring containing a fluid (water). A halogen lamp is used as the source of radiation to simulate solar ...
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Calibration of selected pyranometers and satellite derived solar radiation in Puerto Rico
Knowledge of solar radiation at the ground surface is valuable for many disciplines. In this study, ground–based sensors at Fortuna and Mayaguez, Puerto Rico, were used to calibrate daily–integrated satellite–derived solar radiation. The calibration equations yielded R² values of 0.88 and 0.83 at Fortuna and Mayaguez, respectively. A regression equation was also derived ...
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Relating geo–meteorological parameters to global solar radiation for Egypt by Iranna–Bapat's estimation models
Estimation of solar radiation is considered as the most important parameter for the design and development of various solar energy systems. But, the availability of the required data is very scarce and often not readily accessible. The foremost objective of the present study was to estimate the monthly average global solar radiation (GSR) at various locations for Egypt, by the generalised ...
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Meteorological pre-processing of incoming solar radiation and heat flux over a sparse boreal forest at a northern site during winter conditions
Measurements from Northern Finland on radiation and turbulent fluxes over a sparse boreal forest with snow-covered ground were analysed. The measurements represent harsh winter conditions characterised by low sun angles. The absorption of incoming solar radiation in clear skies (turbidity) was found to be a strong function of the solar elevation. At low solar elevation angles, commonly used ...
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Artificial intelligence techniques for prediction of solar radiation data: a review
Artificial intelligence (AI) techniques are becoming useful as alternate approaches to conventional techniques. They have been used to solve complicated practical problems in various areas and are able to deal with non–linear problems. AI techniques have been applied for modelling, identification, optimisation, prediction, forecasting, and control of complex systems. Artificial neural networks ...
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Measures to weaken the influence of solar radiation on peak cooling load in office buildings
Using the building energy simulation program EnergyPlus, the authors studied and analysed measures to weaken the influence of solar radiation on peak cooling load in office buildings. The peak cooling reduction effect on exterior wall outside surface solar radiant absorptance and different kinds of exterior window constructions were analysed by simulation. The results show that using a low solar ...
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Estimation of monthly average solar radiation in Libya
In order to estimate the monthly average global radiation, regression equations for eleven stations in Libya are fitted, using monthly average hours of sunshine duration as predictors. Since only eight years of monthly average global radiation are available for each station, a reliable model for estimating solar radiation for each single month could not be obtained. The monthly data were merged ...
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Characteristics of solar radiation sensor
Introduction:A solar radiation sensor, also known as a pyranometer, is a device that measures the amount of solar radiation received on a surface in a given time period. Solar radiation is the energy that is transmitted by the sun to the earth, and it is measured in watts per square meter (W/m²). The solar radiation sensor provides valuable information for various applications, including ...
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Developing MATLAB software for PV and battery sizing for lighting projects in Gaza Strip, Palestine
Recently, with the critical situation of the siege on the Gaza Strip, the need for an alternative energy source instead of traditional energy sources increases day by day, especially as Palestine is considered one of the sunny countries and receives good solar radiation over the year. In this paper, the MATLAB software is developed for sizing process of PV modules and batteries. The developed ...
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Different Components of Solar Radiation
Many people have asked us for an illustration that gives a simple overview of the three components of incoming short-wave solar radiation: direct, diffuse and global. We've created a drawing that we hope will make this clear.Direct Radiation The basis of the measurement is a SOLYS 2 sun tracker pointing a CHP 1 pyrheliometer at the centre of the sun. The CHP 1 has a full opening view angle of 5° ...
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Energy and exergy analysis of a double–pass thermoelectric solar air collector
Analysis of energy and exergy has been performed for a double–pass thermoelectric (TE) solar air collector. The incident solar radiation heats up the absorber plate so that a temperature difference is created between the thermoelectric modules that generate a direct current. Only a small part of the absorbed solar radiation is converted to electricity, while the rest increases the ...
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Solar energy utilisation efficiency in environment-controlled agriculture in China
In the light of an analysis of the solar radiation and temperature resources in different part of China, this paper classifies Environment-Controlled Agriculture (ECA) in China into zones and briefly introduces the feature of each zone. Meanwhile, features of different ECA types such as heliogreenhouse, plastic arched shed, adumbral net and their contributions to increasing solar energy ...
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Application of an artificial neural network for predicting the sizing curve of stand-alone photovoltaic system: a case study
In this paper, an artificial neural network-based (ANN) prediction of the sizing curve of stand-alone PV systems (SAPV) was developed. Numerical method has been used for constructing the sizing curves for different loss of load probability (LLP) corresponding to 40-sites located in Algeria. The feed-forward neural network (FFNN) is trained considering the geographical coordinate and LLP as ...
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Solar exergy maps for photovoltaic/thermal systems
In this paper, the thermal and electrical exergies and the exergy destructions are calculated for a photovoltaic thermal (PV/T) system based on solar exergy rates for some Indian climates namely Bangalore, Jodhpur, Mumbai, New Delhi and Srinagar for a year and for different US climates namely Chicago, Las Vegas, Miami, New York, Portland, San Antonio, San Francisco, Tucson and Tulsa for January, ...
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Spectral Selectivity vs. Spectral Error: Shedding Light on ISO 9060:2018
In late 2018, the ISO 9060 standard for solar radiometers underwent a remarkable update that brought significant changes on the classification of solar radiation measurement quality. At first glance, ISO 9060:2018 appears to be mainly a renaming of radiometer classification launched in the original version from 1990. But, as often, the devil is in the details and still causing a lot of confusion ...
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Questions & Answers: Discovering the New SMP12 Class A Pyranometer
Solar demand is surging. Modern PV plants need fast responding precise solutions that are easy to install and integrate, ones that will last. Our new pyranometer, the Kipp & Zonen SMP12 can help you achieve this. On this page, we present our webinar with Clive Lee - Technical Sales and Service Consultant, Dr. Joop Mes - Senior Scientist, and Brandon Sims - Global Product Manager, who present ...
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Thermal management of non–concentrating photovoltaic panels under extreme ambient conditions
Solar photovoltaic modules have reduced efficiency levels when the ambient temperature is very high. In this paper, the temperature and the efficiency of a non–concentrating flat plate collector is determined by a one dimensional steady state analysis at different solar radiation levels for the city of Riyadh, Saudi Arabia where the radiation intensity and ambient temperatures are very high. The ...
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Artificial neural network based models for forecasting electricity generation of grid connected solar PV power plant
This paper presents an artificial neural network (ANN) approach for forecasting the performance of electric energy generated output from a working 25-kWp grid connected solar PV system and a 100-kWp grid connected PV system installed at Minicoy Island of Union Territory of Lakshadweep Islands. The ANN interpolates among the solar PV generation output and relevant parameters such as solar ...
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