Predicting hourly solar irradiations on inclined surfaces based on the horizontal measurements: Performances of the association of well-known mathematical models

Notton, Gilles; Poggi, Philippe; Cristofari, Christian

doi:10.1016/j.enconman.2005.10.009

Cited by 93 publications

(34 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Os modelos paramétricos carecem de informações mais detalhadas das condições atmosféricas locais, conforme a componente a ser estimada, ou então a utilização de percentuais fixos de ocorrência de cada componente da radiação solar global (Liu & Jordan, 1960;Turco & Rizzatti, 2006;Notton et al, 2006;Jiang, 2009). Os modelos estatísticos são representados por equações matemáticas ajustadas por meio de regressão linear ou polinomial em correlações com as frações radiométricas ou com a razão de insolação, caso em que se torna, necessária a verificação do desempenho desses modelos com base em comparações de valores estimados com dados medidos não empregados na obtenção das equações.…”

Section: Introductionunclassified

Estimativas das componentes da radiação solar incidente em superfícies inclinadas baseadas na radiação global horizontal

Souza

Escobedo

Pai

et al. 2011

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

RESUMOForam avaliadas equações estatísticas de estimativas com agrupamentos de dados anuais e mensais e suas respectivas validações, para as componentes global, direta e difusa da radiação solar incidente em superfícies inclinadas a 12,85, 22,85 e 32,85º, com face para o Norte, nas condições climáticas e geográficas de Botucatu, SP. Empregou-se as frações das três componentes da radiação a do topo da atmosfera em correlação com o coeficiente de transmissividade atmosférica do plano horizontal, em uma base de dados de abril/1998 a dezembro/2007, cujas medidas nas três inclinações ocorreram em diferentes períodos, todavia concomitantes ao plano horizontal. O aumento do ângulo de inclinação da superfície propiciou aumento do espalhamento dos valores diários do índice de claridade para superfícies inclinada e horizontal. Nos agrupamentos anuais os piores desempenhos foram verificados na estimativa da radiação difusa diária para superfície inclinada, com valores máximos de espalhamentos iguais a 3,89 MJ m -2 d -1 (43,65%) e ajustamento em torno de 62%. Na estimativa das componentes global e direta da radiação solar nos planos inclinados, podem ser aplicadas, tanto as equações anuais como as mensais, com desempenhos dependentes das condições climáticas. Palavras-chave: índice de claridade, indicativos estatísticos, modelagemEstimates of solar radiation components on a tilted surface based on global horizontal radiation ABSTRACT Statistics equations and validations with groups of annual and monthly data were evaluated for global, direct and diffuse solar radiation components incident on the tilted surface to 12. 85, 22.85 and 32.85°w ith the face North, in climate and geographical conditions of Botucatu, SP. It was employed the fractions of three components of extraterrestrial radiation in correlation with the coefficient clearness index horizontal plane, in a database of April/1998 to December/2007, whose measures at different periods in three inclinations, however concomitant to the horizontal plane. Increasing the angle of the surface led to increased scattering of the daily values of clearness index for inclined and horizontal surfaces. In annual groups, the lower performances were observed in the estimation of inclined daily diffuse radiation, with maximum Root Mean Square Error to 3.89 MJ m -2 d -1 (43.65%) and adjustments around 62%. In estimates of global and direct components of solar radiation on inclined planes, both annual and monthly equations can be applied, with performance dependents to climatic conditions.

show abstract

Section: Introductionunclassified

Estimativas das componentes da radiação solar incidente em superfícies inclinadas baseadas na radiação global horizontal

Souza

Escobedo

Pai

et al. 2011

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

show abstract

“…The best combination was Maxwell + Klucher for the 45 • inclination angle. For 60 • inclination, the most efficient model was Skartveit and Olseth's model combined with Klucher's model [83].…”

Section: Combination Of Diffuse Estimation Models For Horizontal and mentioning

confidence: 99%

Estimation of Hourly, Daily and Monthly Global Solar Radiation on Inclined Surfaces: Models Re-Visited

2017

View full text Add to dashboard Cite

Abstract:Global solar radiation is generally measured on a horizontal surface, whereas the maximum amount of incident solar radiation is measured on an inclined surface. Over the last decade, a number of models were proposed for predicting solar radiation on inclined surfaces. These models have various scopes; applicability to specific surfaces, the requirement for special measuring equipment, or limitations in scope. To find the most suitable model for a given location the hourly outputs predicted by available models are compared with the field measurements of the given location. The main objective of this study is to review on the estimation of the most accurate model or models for estimating solar radiation components for a selected location, by testing various models available in the literature. To increase the amount of incident solar radiation on photovoltaic (PV) panels, the PV panels are mounted on tilted surfaces. This article also provides an up-to-date status of different optimum tilt angles that have been determined in various countries.

show abstract

“…However, these models require information at the same time on the global and the direct or diffuse irradiance on a horizontal surface. In [27], two models requiring only the global irradiance on horizontal planes as input parameter were developed. The present work uses the model given in Eq.…”

Section: Module Temperaturementioning

confidence: 99%

Comparative study between classical methods and genetic algorithms for sizing remote PV systems

Makhloufi

2015

Int J Energy Environ Eng

View full text Add to dashboard Cite

Uncertain renewable energy supplies, load demands and the non-linear characteristics of some components of photovoltaic (PV) systems make the design problem not easy to solve by classical optimization methods, especially when relevant meteorological data are not available. To overcome this situation, modern methods based on artificial intelligence techniques have been developed for sizing PV systems. However, simple methods like worst month method are still largely used in sizing simple PV systems. In the present study, a method for sizing remote PV systems based on genetic algorithms has been compared with two classical methods, worst month method and loss of power supply probability (LPSP) method. The three methods have been applied to a PV lighting system with orientation due south and inclination angles between 0°and 90°in Adrar city (south Algeria). Because measured data for the chosen location were not available, a year of synthetic hourly meteorological data of this location, generated by PVSYST software, have been used in the simulation. Genetic algorithms and worst month methods give results close to each other between 0°and 60°but the system is largely oversized by the worst month method when the tilted angle is over 60°. The results obtained by LPSP method show that the system is very undersized. Hence, a proposition has been made to improve results obtained by this method.

show abstract

Predicting hourly solar irradiations on inclined surfaces based on the horizontal measurements: Performances of the association of well-known mathematical models

Cited by 93 publications

References 25 publications

Estimativas das componentes da radiação solar incidente em superfícies inclinadas baseadas na radiação global horizontal

Estimativas das componentes da radiação solar incidente em superfícies inclinadas baseadas na radiação global horizontal

Estimation of Hourly, Daily and Monthly Global Solar Radiation on Inclined Surfaces: Models Re-Visited

Comparative study between classical methods and genetic algorithms for sizing remote PV systems

Contact Info

Product

Resources

About