The Study of Improvement of Energy Consumption in the Building Hot Water Systems

• Main Authors: Chung-Yi Lai, 賴忠毅
• Other Authors: 李孟杰
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/wdnj4b

碩士 === 國立臺中科技大學 === 室內設計系碩士班 === 101 === The water heating system consumes the most energy of hot water using in a building. This study aims at the energy and water saving of hot water systems. The hot water system is divided into the central hot water systems and the individual hot water systems. The energy consumption of central hot water systems can be saved by changing into to heat pumps, and the energy consumption of individual hot water systems can be reduced by changing into circulation hot water systems. This study builds a 20m-length circulation hot water system, including 2 different pipe diameters (13mm and 19mm), 6 different pipe lengths (1m, 2m, 4m, 8m, 16m and 20m). Comparing with the non-circulation hot water system, the individual circulation system and bypass circulation system can save up to 55% electric energy and 20% gas consumption, without wasting the cold water. According to the experiment results, the circulation water system saves more energy than the non-circulation system. The open building concept can be adopted as the circulated piping system installation. In order to achieve the aesthetic and the easy-to-maintenance objectives, the water pipes can be put under the raised floor or the skirt board integrated with the circulation water system. Another piping method is the bypass circulation hot water system which almost consumes the same energy and water saving efficiency as the individual circulation hot water systems.