For Case-I, the maximum heat losses through the vent was 372.099 W at 11 h, 367.266 W at 12 h W and 260.784 W at 15 h
during the first, second and third day respectively. However, for Case-II it was 310.649 W, 436.366 W and 326.718 W during the first, second and third day respectively. By using solar collector inside the NWIGHD the chances for heat recovery increases, which can be utilised for crop drying.