Low budget solar cookers: An alternative to diminish the use of wood as a source of fuel

The report shows the results of the Low Budget Solar Cookers less than US$20 designed and developed at the School of Physics seeking to reduce the consumption of wood as an energy source. According to National statistics this source of energy represents 53% of the primary energy consumed in the country. The solar cookers are made with cardboard, glass, aluminum foil iron sheet, and vegetable residues as thermal insulator, other insulators are polyurethane residue which testing have determined its thermal resistance. The Solar cookers are tested before the presentation to the community. Optical efficiency, thermal efficiency, Merits numbers F1-F2, and cooking capabilities are among the tests performed on the solar cookers. The University personnel also test the nutrient contents of various dishes prepared on the solar cooker comparing the results with those obtained from conventional cooking procedures. The University promotes the solar cooker with the community during extensive training throughout various regions of the country. Personnel also dedicate time to instruct several community leaders at the University facilities. The Salvadoran population that has being exposed to solar cookers have shown acceptance to this alternative energy source replacing the scarce and more expensive wood fuels specially in rural areas of the country.