An investigation on effect of variation of mass flow rate and number of collectors on yearly efficiency of single slope solar still by incorporating N similar photovoltaic thermal flat plate collectors

The effect of variation of mass flow rate ((m)over dot(f)) and number of collectors (N) on yearly efficiency of single slope solar still by incorporating series connected N similar photovoltaic thermal flat plate collectors (NPVTFPCSS) has been investigated keeping a constant water depth in basin as 0.14 m. The various parameters have been calculated taking into account all four types of weather conditions for New Delhi using computing code developed in MATLAB-2015a. All equations and required data have been fed to the computing code for evaluating different relevant parameters. It has been concluded that the value of all types of annual efficiencies except annual electrical efficiency diminish with increase in value of (m)over dot(f) at selected value of N till (m)over dot(f) = 0.10 kg/s and then become almost constant. Optimal values of N from annual overall exergy efficiency and annual overall thermal efficiency viewpoints have been found as four and ten respectively.