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Emerging Technology and Advanced Engineering

Although sun light outside the earth’s atmosphere is relatively constant, the situation at the earth’s surface is more complex. Terrestrial sunlight changes dramatically and unpredictably in availability, intensity and spectral composition. On clear days, the length of the sunlight’s path through the atmosphere or the optical air mass is an important parameter. The indirect or diffuse component of sunlight can be particularly important for less ideal conditions. Reasonable estimates of global radiation (direct plus diffuse) received annually on horizontal surfaces are available for most regions of the world. However, there are uncertainties involved in using this for a specific site because of the large deviations that can be caused by local geographical conditions and approximations involved in conversion to radiation on inclined surface [1,2]. II. EXPERIMENTAL WORK The solar array, milliameter, voltmeter and rheostat are connected in the circuit which is shown in figure – 3. In this paper we have taken different datas from IDAR (Latitude: 23.8400277°, Longitude: 73.0021534°) a taluka place during the month of November-2013 by illuminating the solar light on the multicrystalline silicon solar array we got different parameters of the solar cell like open circuit voltage (Voc) across the array (when voltmeter is directly connected across the solar array without any load) and short circuit current (Isc) (when milliameter is connected in series with solar array), Fill Factor and Efficiency etc. [3, 4]. All the parameters are discussed below in detail