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Topics: Rice, Cereal, Irrigation Pages: 27 (7077 words) Published: August 26, 2013
Design and Performance Evaluation of an Improvised Mechanical Grain Dryer

PHYSICAL SCIENCE

A Research Paper Presented
To the Faculty of
Santa Barbara National Comprehensive High School
Santa Barbara, Iloilo

In Partial Fulfillment of the Requirements
In Research II

By:

Bren Andrew S. Jalique
Mark Robert C. Suelo
Ace June M. Sequito

IV-SSC

August 2009

Acknowledgement
The researchers would like to extend their deepest gratitude and thanks for all the people who made this study possible. To the Almighty God, for giving the researchers all the blessings, guidance, and patience that made this study possible. To Mr. Rogelio Oscares, the principal of Santa Barbara National Comprehensive High School who served as one of the inspirations for this research study. To Ms. Oliva Suelo, the Head of the Science Department, for her unending support, assistance and encouragement to make this research study a success. To Eufemia Sonza, Research II Adviser, for all the genuine support, understanding, advises and guidance she selflessly offered to all of us to make this study worth doing.

To our parents who were always there to give their love, guidance and understanding and for their moral and financial support.
To Mr. Domingo Somcio, physics teacher, for his knowledge about physical operations and knowledge about concepts of Physics.
To Engr. Remia Capistrano, Engr. Rodrigo Trio, and Engr.Yvonne Grace Herbo, for sharing their expertise and knowledge on almost all about rice drying and grain dryers and source of literature.
To Engr. John Suelo, for his support, assistance and participation during the construction and testing of the dryer.
To Engr. Boy Somogod, for his support and knowledge and expertise about rice grains and the concept of drying and for allowing the researchers to use their Moisture Content Tester.
To Engr. Aries Roda Romallosa, for giving us knowledge in the field of agricultural technology and for the consultation of our research study.
To Ms. Mercy Florino, Mr. Anecito Sorilia for their valuable contributions and physical assistance in the construction and operation of the mechanical grain dryer.

The Researchers
“Design and Performance Evaluation of an Improvised Mechanical Grain Dryer” Jalique, Bren Andrew S., Suelo, Mark Robert C., Sequito, Ace June M., Santa Barbara National Comprehensive High School, Special Science Class

Abstract

For the present problems of farmers regarding climate change and economic crisis, this study aimed to design and construct an improvised mechanical grain dryer that can dry newly harvested palay to the desired moisture content for longer storage and with less operating cost. The dryer is a flat bed, batch-in-bin type of which some parts were recycled and improvised. The dryer uses the principle of heat convection in the drying process. The design was made such that after harvesting and drying the palay, the dryer can also serve as storage of dried palay. Rice hulls served as fuel for the dryer. It can dry to a maximum of 20 sacks per drying period.

The performance and efficiency of the dryer were tested as the drying rate, final weight of the grain, moisture reduction per hour, fuel consumption rate, operating cost, return-on-investment, benefit-cost ratio and the payback period. There were three trials during the testing and each trial dried 15 sacks for 8 hours.

Results showed that in average, the drying rate was 81.6 kg of palay per hour and the final weight of the grains was 606.83 kg. The moisture reduction rate was 5.75 kg/hr; the fuel consumption rate was 6.85 kg of rice hulls per hour.

It also showed that the operating cost of the dryer was 0.27 peso per kilo which is half the cost of drying of a local rice mill. The Return-On-Investment was 47.5%, the Benefit-Cost Ratio was 1.34 and the Payback Period was 210.17 days. This means that...

References: Technology Breakthroughs. BPRE
Rice Hull Energy Research at the University of the Philippines, Los Baños, Laguna, 2000 to present
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