https://hdl.handle.net/20.500.12852/531 2026-04-05T18:25:09Z https://hdl.handle.net/20.500.12852/3569 Design, fabrication and evaluation of a seaweed chopper Lucena, Dee B. The study was conducted to design and evaluate the performance of the seaweed chopper intended for local seaweed pre-processing. The fabrication was done at Rubit’s Machine Shop in Lapuz, Iloilo City from October to November 2016 and the performance testing and evaluation were conducted on November 28, 2016 and December 6, 2016, respectively, at the Appropriate Technology Center of the College of Agriculture, Resources and Environmental Sciences, Central Philippine University in Jaro, Iloilo City. The seaweed chopper consists of the following parts: a) main frame structure that holds the whole machine for stability, b) chopping board where seaweed materials are cut, c) guide frame that guides and secures the chopping assembly when mounted, and d) chopping assembly responsible for cutting of seaweeds. The machine chops seaweed materials into a length of 1.27 to 2.54 cm (1/2 to 1 in.). The operation of the chopper starts from the loading of seaweeds into the cutting area and are cut by the vertical shearing action of the chopping blades. The chopped seaweeds are then discharged into a container by pulling the chopping board sideward. Results revealed that the machine has an average chopping capacity of 0.60 kg/min or 36 kg/hr with an overall chopping efficiency of 97.13%, resulting in a chopped length of 2.16 cm of seaweeds. It has an investment cost of Php7,000.00. The fixed and variable costs per day amounted to Php 12.85 and Php2,576.00, respectively, giving a total cost of Php2,588.85 per day. With this, the cost incurred in operating the machine is Php 11.99 per kg of seaweed material. Abstract only 2017-04-01T00:00:00Z https://hdl.handle.net/20.500.12852/3244 Design, fabrication and field test evaluation of a portable stainless parshall flume Gualin, Chiara Alexandra B. The study was conducted to design and evaluate the performance of a portable stainless Parshall flume for field use. It was fabricated at a machine shop in Molo, Iloilo City from October to November 2018 while field testing and evaluation were done on January 2019 in a lateral canal located in Brgy. Pagsanga-an, Pavia, Iloilo. The device consisted of: (a) converging section where the irrigated water enters and where the primary measurement is positioned, (b) throat section where the secondary measurement is positioned and (c) diverging section where the irrigated water exits from the flume. The flume also consisted of other parts like the spirit level, staff gauges and handle. The operation started when the Parshall flume was leveled and established in a non-lined open channel, then embankments or wingwall were constructed adjacent to the converging and diverging sections of the device. There were 10 tests performed which represented 10 different depths of water starting from 9 to 45 cm. The volumetric flow rate measured using the Parshall flume ranged from 5.879 x 10-3m3/s to 0.075 m3/s. Whereas, the computed volumetric flow rate using the float method ranged from 5.624 x 10-3 m3/s to 0.120 m3/s. The accuracy of the flume for the first 5 depths (9 cm to 18.5 cm) was computed to be within or close to the +/- 2 to 5% difference, which indicated a relatively accurate volumetric flow rate. The five remaining depths (22 cm to 45 cm), however, showed inaccuracies due to seepage. Adding the total material cost, labor cost and contingencies gave a total expense of PHP12,630.00 for the flume. Abstract only 2019-03-01T00:00:00Z https://hdl.handle.net/20.500.12852/3242 Hydrologic and climatic study of Cameros Communal Irrigation System, Anilao, Iloilo Boy, Josie Abelita The study was conducted from July to October 1984 in Cameros Communal Irrigation System which covered five barangays of Anilao, Iloilo. The objective of the study was to gather and consolidate hydrologic and climatic data which affect the amount and supply of irrigation water so as to serve as theoretical bases for water distribution and rotational plans, assessment of water used and wasted. The study also aimed to have a data on crop water requirement and water availability. Results showed that irrigation water supplied during the months of August, September and July were 18 .59, 1 6 .8 and 15 .02 cm, respectively. The peak precipitation occurred in the month of September with 33.5 cm, followed by the months of August and July with 24.74 and 17.7 cm, respectively. Water requirements for the months of August, September and July were 18.85, 18.05 and 17.95 centimeters, respectively. The daily average water requirement was 0 .5984 cm or 5,984 liters/ha/day while rainfall was 0.869 cm or 86,900 liters/ha/day. This implies that on the average the amount of precipitation can meet the water requirement of crops with an excess of 0.27 cm/day on the ground surface. The total water supply (irrigation + rainfall) was 1 .419 cm/day, which means that about 0.82 cm/day or 82,000 liters/ha/day was applied in excess of the crop water requirement. The average daily water use efficiency was 42 percent, 30 percent or 0.4344 cm/day or 43,440 liters/day/ha was due to evapotranspiration and 12 percent or 0.169 cm per day or 164,000 liters/day/ha had seeped and percolated. Water requirement was not significantly affected by irrigation water but affected significantly by precipitation. Regression coefficients indicate that for every 1 cm of water consumed, irrigation increased by 0.299 cm, and for every 1 cm increase in rainfall, water requirement increased by 0.097 cm. The irrigation water decreases significantly by 0.00672 cm for every 1 cm increase in rainfall. Water supply was sufficient during the period of the study. Floods occurred three weeks before and during harvesting. It was also observed that more than 50 percent of the water was lost and used unwisely. Based on the results of the study, the following are recommended to minimize water losses: 1. The irrigation association should make a cropping calendar using the data available which will serve as their guide for irrigation practices, that is, what sector or field must b e irrigated first; 2. A small farm ditch must be provided to deliver irrigation water from the canal to the different field to eliminate paddy to paddy irrigation; 3. There must be a periodic cleaning and checking of irrigation canals and structures to minimize leakage; and 4. Further study is also recommended with a duration of at least one year to have a complete basis for cropping calendar, and will include drainage data. Abstract only 1985-08-01T00:00:00Z https://hdl.handle.net/20.500.12852/3239 Design and evaluation of a manually operated forage chopper Pelaez, Xykster Celso The study was conducted to design and evaluate the performance of the manually operated forage chopper. The fabrication was done at a local welding shop in Mina, Iloilo on May 4to 11, 2009 and the performance testing and evaluation were conducted from May 13 to14, 2009 at Brgy. Cabalabaguan, Mina Iloilo. The forage chopper consists of the feed hopper, handle, discharge chute, flywheel and cutting rotor as major components. It chopsforage materials into short parallel lengths. Operation of the shredder starts from loading forage material into the feeding hopper. The materials are cut by shearing action of the cutting blades of the machine. Performance evaluation of the forage chopper revealed that it can easily chop 2 kg of swamp cabbage in an average of 35 sec operating time at an approximate speed of 60 rpm. It has a chopping capacity of 3.49 kg/min at 10 min/day operation, just enough to provide the forage needed for backyard raising, The machine has a chopping efficiency of 93.33% producing chopped materials with an average length of 1.42 in. Data show that the forage chopper can be fabricated using locally available materials. It has an investment cost of P4,000.00 The fixed and variable costs per day amounted to P7.35 and P25, respectively, giving a total cost of P32.25 per day. The cost incurred in operating the machine is P0.93 per kg of forage material. Abstract only 2009-07-01T00:00:00Z