This paper discusses about the parametric studies carried out on 10 m3/day capacity multi effect distillation desalination plant. In the present work studies were performed to determine the effect of process parameters on the production capacity of the MED plant. GOR of plant is around 3.6. Effect of solar irradiation on the evaporation rate in each effect is determined and presented with respect to time. Influence of the operating pressure and temperature on the performance of each effect is measured during the experiment and presented in the current work. Influence of steam input on the system performance is discussed. It was observed that increase in solar irradiation influences the steam production. Increase in the steam production rate influences GOR. Increase in the solar irradiation by 24% maximum on a typical day resulted in increase of evaporation rate by 20.6%, 17.3%, 15.7% and 12.3% corresponding to the effect 1, 2, 3 and 4 respectively. It was also observed that the production rate is found to be higher after the mid noon compared to the forenoon even though the solar irradiation is measured to be comparatively higher in forenoon than after mid noon.