| Summary: | 碩士 === 國立臺灣科技大學 === 建築系 === 94 === Recently, the new buildings have been in general introduced the saving water sanitary facilities due to the national building regulation, as well as in the existing residential and office buildings. The result of initiating the saving water policy could already be seen. However, the use of lower volume water closets to save water in the existing buildings might have other difficulties. As an example, the lower flush volume might influence the ordure-transferring performance in a drainage system. Thus, in order to explore and understand the difficulties of using the lower volume water closet in the existing buildings, this research firstly focused on gathering the saving water system related methodologies and standards, as well as on investigating its development and current condition of the usage. The result would be the basic information for setting up the ordure-transferring forecast formula of the lower volume closet. Moreover, there were required experiments completed using domestic lower volume water closets for studying its effects on the existing drainage systems and verifying the prediction model. The outcome of the study provides a chance for the designers and users to test their products by applying the prediction model. After the low volume water closets were introduced, the study was a start to concern the issue of balancing between saving water and ensuring the performance of the drainage systems.
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