Modelling and estimation of photosynthetically active incident radiation based on global irradiance in Indian latitudes
TLDR
In this article, a power regression model showing the relationship between photosynthetically active radiation (PAR) and Hg is presented for six Indian latitudes and for the entire year based on hourly and monthly average of the daily global radiation (Hg).Abstract:
Photosynthetically active radiation (PAR) as a component of solar radiation plays a major role in different applications dealing with plant canopies, biomass production and microalgae growth. The amount of PAR energy depends upon location, time of the year and atmospheric conditions. Understanding the PAR and its availability is very essential for modelling biological growth system. The objective of this study is to estimate PAR for latitudes ranging from 9° to 34° and for the entire year based on hourly and monthly average of the daily global radiation (Hg). Based on the estimated data, a power regression model showing the relationship between PAR and Hg is presented for six Indian latitudes. The ratios of hourly sum of PAR to Hg and monthly average of hourly global radiations (Ig) vary smoothly with significant seasonal variations and are influenced by several other local climatic conditions. The power regression equation between PAR and Hg obtained are as follows: (a) For 9° latitude, PAR = 0.040 (Hg) 0.924 , R 2 = 0.970, (b) 14° latitude, PAR = 0.029 (Hg) 0.952 , R 2 = 0.894, (c) 19° latitude, PAR = 0.256 (Hg) 0.748 , R 2 = 0.721, (d) 24° latitude, PAR = 0.159 (Hg) 0.775 , R 2 = 0.896, (e) 29° latitude, PAR = 0.052 (Hg) 0.886 , R 2 = 0.830 and (f) 34° latitude, PAR = 0.016 (Hg) 1.013 , R 2 = 0.768.read more
Citations
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Calculation of monthly average insolation on tilted surfaces
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Comparative study of isotropic and anisotropic sky models to estimate solar radiation incident on tilted surface: A case study for Bhopal, India
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Nutrient ratios influence variability in Pseudo-nitzschia species diversity and particulate domoic acid production in the Bay of Seine (France).
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Determination of optimum tilt angles for solar collectors in low-latitude tropical region
TL;DR: In this article, a set of data recorded from a pryanometer located on latitude 6.45° north of the equator was used to generate average monthly radiation over the latitudes.
References
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Book
Solar engineering of thermal processes
TL;DR: In this article, the authors present an active and passive building heating system for solar thermal power systems, where the active system is designed by f--chart and the passive one by Utilizability Methods.
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The interrelationship and characteristic distribution of direct, diffuse and total solar radiation
TL;DR: In this paper, the authors present relationships permitting the determination on a horizontal surface of the instantaneous intensity of diffuse radiation on clear days, the long term average hourly and daily sums of diffuse radii, and the daily sum of diffuse radiata for various categories of days of differing degrees of cloudiness.
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The long-term average performance of flat-plate solar-energy collectors
TL;DR: The flat-plate collectors have been used successfully for many years in the southern United States and elsewhere as water heaters, and potentially can be used for space heating, drying, refrigeration, power generation and similar purposes as discussed by the authors.
Calculation of monthly average insolation on tilted surfaces
TL;DR: A simple method of estimating the average daily radiation for each calendar month on surfaces facing directly towards the equator has been presented by Liu and Jordan as discussed by the authors, verified with experimental measurements and extended to allow calculation of monthly average radiation on surfaces of a wide range of orientations.
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