https://hdl.handle.net/20.500.12852/615 2026-04-05T18:25:09Z https://hdl.handle.net/20.500.12852/2588 Low cost solar hot water system Tyler, Michael T. Solar Hot Water systems are extensively used in some of the more developed countries in the world. They have been subject to much research and are now extremely efficient units. With all of these improvements the cost has escalated to result in units which cannot be afforded in the lesser developed countries. It was because of the high cost that we in Central Philippine University decided to develop a low cost unit, which although not so efficient would be affordable and simple to construct. It should also be designed in a way that it could be used for educational purposes. Journal article 2000-01-01T00:00:00Z https://hdl.handle.net/20.500.12852/2586 Open laboratory Rio, Walden S. The education imparted to the student today is based on the lecture being done by the faculty and the laboratory work undertaken by the students with the teacher doing the supervision of the laboratory work. The objective of laboratory work is to bridge the gap between the theory taught in the classroom and the actual practice in the field. At present students are not inclined or motivated to learn from the laboratory work because of lack of space, equipment and competent teacher. The open laboratory concept requires each student to actually perform the laboratory work any time the laboratory is open. In doing this the student will have to learn since they individually have to undertake the laboratory exercise and will be checked by the teacher. The open laboratory may require additional personnel space and equipment but if it will be implemented it will result in students learning more from the laboratory work. Journal article 2000-07-01T00:00:00Z https://hdl.handle.net/20.500.12852/2477 The non-conventional energy systems (NES) census of Panay and Guimaras Militar, Jeriel G. This paper presents in brief selected results of the census of non-conventional energy systems (NES) of Panay and Guimaras. The census was conducted by the Central Philippine University- Affiliated Non-conventional Energy Center (CPU-ANEC) as part of the National Census of NES mandated by the Department of Energy (DOE) through its Non-Conventional Energy Division (NCED). One important finding shown by the results of the census is that biomass is the greatest contributor of non-conventional energy in Panay and Guimaras. Another important finding which is somewhat already expected, is that wind pumps proliferate in Iloilo. However, many of these are inoperational due to technical failure and a good number had been damaged by strong typhoons. Findings like these can serve as useful inputs in the formulation of area-based energy plans to effectively promote the widespread use of non-conventional energy. Furthermore, other government and private institutions, individual researchers, project implementors and entrepreneurs can also make good use of these findings as well as other additional information that can be gleaned from the results of the census. The complete results are available at the CPU-ANEC office to interested parties upon request. Journal article 1996-07-01T00:00:00Z https://hdl.handle.net/20.500.12852/2476 Monitoring the performance of anaerobic digesters at high loading rates for failure control and optimization Carnaje, Naomi P. The anaerobic digestion process is of world wide significance for the treatment of highly concentrated wastes such as industrial and rural effluents, and sewage sludge. As its by product, a renewable fuel is produced. However, this process is known to be relatively unstable. Especially when loaded with high concentrations of organic material, volatile fatty acids (VFA) are produced rather than methane (CH) gas resulting in severe ecological, hygienic, and economic problems. The performance of a 1-liter laboratory anaerobic digester (CSTR) under high loading rates was investigated. The changes in the conversion efficiency of the digester, volatile fatty acid concentrations, H₂ partial pressure and pH were monitored at every step increase in the loading rate to determine the behavior of the digester near the maximum sustainable loading rate and under overloaded conditions. Some microbiological and chemical principles which explain why anaerobic digesters fail and how to prevent failure are likewise discussed. The findings reported in this study may be useful in the design of a control technique for the safe operation of anaerobic digesters. Journal article 1996-07-01T00:00:00Z