DESIGN AND MANUFACTURING OF CROSS-FLOW TURBINE TO POWER COFFEE PROCESSING PLANT & NEARBY COMMUNITY VILLAGE IN KAFFA ZONE

Hydro energy, a well-studied form of energy, takes the lions share in energy generation. Lately, it has become evident that the power generated at large scale hydro power plants will not be costeffective for electrification of small rural villages located remarkably far from the grid lines. Thus, huge sum of money is required for the extension of major grid lines to small rural and scattered settlement settings, which in turn has created a large opportunity for more research and development in the area of micro hydro power plants development. This paper encompasses the study and analysis of the hydrology of a location found in the kaffa area of the SNNPR in Ethiopia including the corresponding design and manufacture of a cross flow turbine for the area to generate power that would be accessed by the local village and coffee processing plant. The plant is able to generate 19.39 KW's of energy with an approximate efficiency of 80 % which can light up to 152 households assuming a 3hour usage per day including powering a pulping machine with an average working duration of 8hours per day. The design initiating from the hydrological study has covered design of the runner, shaft, nozzle and belt including selection of alternator and control unit. Moreover, the absence of a clear and simple design manual for the design of this machine has inspired the research for the development of a computer program that would simplify the designing process for professionals working on cross flow turbines.