in the above Fig. 10, it can be seen that sometimes Cd is increasing with respect to time and it decreasing with respect to solar radiation. Generally the value of Cd was found more during noon and less in the evening. The effect of solar collector inside NWIGHD (Case-I) can be seen in Fig. 6, the curves are more standardised as compared (Case-II). The maximum Cd(0.0827) was achieved during the third day of experiment at 8 h in Case-II.