The research is concerned with design and simulation of parabolic trough solar collector to produce energy for student café food cooking and studying its feasibility by cross checking financial analysis. The reason way to do this research is to solve the problem of economic extravagant for buying the fuel oil to run the student café boiler water heater. Since 3000 liters of fuel oil is needed every 22 days and this oil needs 53,280 birr it was better to change this fuel energy by solar power and the parabolic trough solar collector is designed and simulated. A three seriously connected parabolic trough solar concentrators of aperture area of 1.44 m× 2.083m each with concentration ratio of 15 has been investigated and the simulation analysis of parabolic trough solar collector with cavity absorber used for water heating. A 54mm×54mm glass square tube has modified to give a C-shape groove in one of its side to serve as a cavity tube absorber. The cavity absorber was selected with simple copper tube absorber external diameter of 30mm, internal diameter of 26mm and tracking mechanism was manual. The data taken in the months of January to September 2017 every first two days’ results have shown that the system with cavity absorber raised the temperature of water in the tank up to 91oC which is shown in simulation result. The daily average solar collector efficiency for the cavity system is better than simple pipe absorber system. Hence, using a cavity absorber was preferable