Development of huller for robusta and excelsa coffee beans/ Kenneth Cedryk M. Acosta, Rowia Miralie C. Alcantara, Kenneth M. Bueta, Juaquin Alonzo O. Cartabio, and Jethro S. Montances .--

Bachelor's thesis

College of Industrial Technology .-- Bachelor of Engineering Technology major in Electrical Technology: Technological University of the Philippines, 2024.

Includes bibliographic references and index.

The existing hulling machine used by coffee farmers in Amadeo, Cavite, has limitations,
including high energy consumption and inconsistent performance. It struggles with
handling larger input weights, leading to inefficiencies in coffee bean processing. The new
huller machine has features such as a high-speed motor, an agitator for efficient hulling,
and an emergency stop button for safety. It was tested many times at TUP Manila to
evaluate its capacity, efficiency, and speed in processing coffee beans. The results showed
slight improvements compared to the existing machine used by Sir Randy in Amadeo,
Cavite. Test results indicate that the prototype processes robusta coffee beans more
efficiently, eliminating husk in the final output with only a small percentage of broken
beans. When hulling Excelsa beans, the prototype takes longer and produces more husks
and broken beans, attributed to the bean's larger size and harder texture. However, the
prototype performs better than the existing machine in handling higher input weights
without interruptions. The prototype was evaluated by 30 evaluators composed of, coffee
farmers, professors and students under the Electrical Department of Technological
University of the Philippines - Manila with an overall mean of 4.57 with a descriptive rating
of "Excellent" rating. It was concluded that the developed machine meets a standard
usability and less electricity consumption.

Keywords: coffee huller, prototype, efficiency, safety, robusta beans, excelsa beans,
parchment, energy consumption and broken beans.