Potential of solar industrial process heating in dairy industry in India and consequent carbon mitigation

An attempt to estimate the potential of solar industrial process heating (SIPH) and corresponding mitigation of greenhouse gas emissions in dairy industry in India is presented. An assessment of availability of solar radiation as well as of the ambient conditions at various locations with milk processing plants has been made. The effect of the choice of design value of direct normal irradiance on the annual performance of solar process heating systems has been studied using model developed for hourly simulation of the performance of solar process heating system. Further, state wise estimates for useful thermal energy delivery and corresponding solar fraction have also been obtained. The total process heating potential in term of useful energy requirement in dairy sector in India has been estimated at 6.40 PJ/annum which reduces to 4.50 PJ per annum if the process heating requirement is restricted to only pasteurization stage of milk processing. The corresponding solar collector area requirement for process heating in dairy industry in India is estimated in the range of 1.54-1.83 million m(2) with the average solar fraction estimated in the range 0.18-032. The use of solar energy for meeting milk processing related thermal energy demand is expected to mitigate (32-144 thousand tonnes) of CO2 emissions annually. (C) 2016 Elsevier Ltd. All rights reserved.