Kumar, VishalThokchom, Dinesh2020-11-262020-11-262020MT/PFE/494/2018-19https://krishikosh.egranth.ac.in/handle/1/5810155832In India, roasted or boiled sweet corns are sold by the street vendors very highly and also the roasted and boiled corns are popular snacks enjoyed by many people. Many have tried and various technologies have been created for the process of quicker and easy, low cost, stress-free roasting to be obtained. The limitation of unavailability of an integrated corn roasting cum boiling unit is mainly due to the huge gap between the affordability of Indian street vendors and the high cost of the machines for roasting and boiling corns. Beside from this, the Indian vendors also experience another drawback in the form of drudgery involved during roasting and boiling where they are constantly exposed to heat. At times when the corn is over or under roasted, the traditional roasting process affects the outer beauty or attractiveness of the corn. The use of power driven and automated equipments are impossible for Indian street vendors due to their economic conditions. Therefore, developing of a corn roasting device with increased efficiency, productivity and with affordable price is very much needed in order to face the stress and limitations during roasting. A low cost portable corn roaster-cum-boiler was designed and developed and its performance evaluation was evaluated. It was designed and fabricated which can roast around 20 corns and can boil 24 corns in an hour. The average heat utilization factor in no load condition was found to be 0.14 while at full load condition it was 0.26. An average thermal efficiency of 51.05 per cent was obtained for the unit. The mean roasting efficiency of the developed corn cob roaster cum boiler was determined to be 95.09%.Total cost of the functional prototype is Rs 20,000.The net present worth calculated for next 5 years was Rs 1, 64,990, internal rate of return 243 per cent, benefit cost ratio 1.44 and payback period 0.40 years inferring that the developed unit is economically viable.EnglishThesis