Performance analysis of a solar type box for water treatment focus on synergy of IR and UV radiation

• Main Authors: Ismelda Isabel López Tohom, 杜伊湄
• Other Authors: 陳長仁
• Format: Others
• Language: en_US
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/23667907698728130330

碩士 === 崑山科技大學 === 機械工程研究所 === 99 === Water is the most abundant component in the planet, its physical and chemical characteristics allows life in oceans, rivers, lakes, mountains, and all over the planet’s surface. It is the most important liquid to preserve life; even so it needs treatment to be drinkable. The Millennium Declaration Goals include a target to “Halve the proportion of people who are unable to reach or afford safe drinking water by 2015” Since long time ago, there has been recognized the relative importance of water quality, quantity, sanitation and hygiene not only to protect but also to improve health. In this work, the performance of a solar type box is evaluated as an alternative to water treatment technology at a household level. In order to analyze different conditions which the water can be warmed up inside the solar type box, several experiments carried out at Department of solar Energy laboratory, Kun Shan University, Tainan, Taiwan R.O.C. were performed with the main focus on E. Coli. These experiments demonstrated that hanging the water container inside the solar type box instead of placing it over the base, allows 40% more UV radiation and the same IR radiation. In relation to materials as a water container; plastic bag (polietilene), glass and PET suggested an efficiency of 75%, 50% and 45% respectively relative to IR, and 88%, 76.49% and 74.94% concerning to UV radiation. The SODIS method vs. solar type box experiment and conceptual analysis comparison indicated that the first one needs 4,800Wh of solar radiation and 16.61Wh of UV radiation to eliminate 99.99% of bacteria; the solar type box needs 1050Wh of total solar radiation and 7.39W.h of UV radiation to get the same results leading to an efficiency of 6.92% and. 52.82% when compare with the first method regarding IR radiation and 56.19% vs. 24.95% in relation with UV radiation. The Solar type box for water treatment is an option for the solution of the drinking water problem, financially viable and physically useful.