Exact(3)
arithmetic average of the thicknesses of dust collected on module.
where Volume of dust collected = Mass of dust collected/Density of dust collected on module.
Thus, the equation obtained (Equation 8) may be taken as a valid equation, and using it, Δη (difference in efficiencies of module) can be calculated using the known values of t (thicknesses of dust collected on module) for a location.
Similar(57)
Here, a statistical analysis has been done in finding out the correlation between thicknesses of dust collected on photovoltaic module and the difference in efficiencies of the module for a whole year considering all seasons of a composite climate.
An effort has been made to develop an equation with the given data for all seasons for a location (Lucknow, India) consisting of composite climate, which is further helpful in developing a relation between difference in efficiencies of module with respect to thicknesses of dust collected on the module.
The authors (Mekhilef et al. 2012) have correlated between thickness of dust collected on PV module and difference in efficiencies in composite climate.
Correlation between the monthly average of thicknesses of dust collected on photovoltaic module and the monthly average of difference in efficiencies for a whole year (2010 to 2011).
In Table 1, both variables are taken as monthly average value of difference in efficiencies and monthly average value of thicknesses of dust collected on the module.
On the other hand, thickness of dust particles collected on the module is calculated using the following the basic formula: Thickness of dust collected = Volume of dust collected/Area of solar panel, Open image in new window (1).
Here, reading is taken three times for each month after every 10 days, and finally, the average of the three readings is taken as measured value of the data for both the variables (difference in efficiencies and thicknesses of dust collected on the module) for that particular month.
The beams were collected on a multi collector module with eight movable and one fixed Faraday cup displaying a maximum relative mass range of 17%.
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