An Optimal Design And The Development Of The Experimental Platform Of Water Supply And Drainage Based On A Evaluation Method Of Fuzzy Mathematics

A water supply and drainage system is one of the important components of a modern building. In order to satisfy the diverse requirements of practical function for the modern building, a lot of new systems are derived from the corresponding engineering of water supply and drainage, and the layout of pipes and equipments in each system becomes increasingly complex. An experimental platform is developed to fully and intuitively display the components of each system in the engineering of water supply and drainage.The fuzzy comprehensive evaluation theory of fuzzy mathematics is adopted to optimize the running methods for the water supply system, the drainage system, and the fire hydrant system in the experimental platform, respectively, which leads to the following results: the best effect for the water supply system is obtained by the parallel connection way of directly pressurized by a variable frequency pump and zoning; the technique,economy and social environment indexes are more excellent since the special venting pipes are used in the drainage system; when the type of the building in the experimental platform is assumed to be the first and second class construction in the national building code, respectively, the corresponding fire hydrant system adopts the water supply system of the parallel connection of fire pumps and zoning and the water supply one of the variable frequency pumps.The characteristic coefficient method of branch pipes is used to optimize the design of the automatic sprinkler system in this paper. By testing the pressures of the pipes in the experimental platform and comparing the measured values of the pipe pressures with the calculated ones of the fitting curve in the theoretical pressure scatter plot, the results can be obtained, indicating that the design of the automatic sprinkler system in the experimental platform is consistent with the results of theoretical calculation.According to the testing methods above, the systems of water supply, fire hydrant, and automatic sprinkler are tested, respectively. The results show that the experimental platform can measure the parameters of set point's pressures, flow rates and pipe flows of each system in the engineering of water supply and drainage. The basic tests and experiments of the variable frequency water supply, the pipe's connection of each system, the variable laws of water, air-flow in the horizontal tube and vertical tube of the drainage system, fire hydrant system, automatic sprinkler system, and water spray system fire-extinguishing can be carried out on the experimental platform. The experimental platform can be used as both the main teaching laboratory equipment of the water supply and drainage engineering laboratory and the tool to verify the design and calculation on pipe networks of the water supply and drainage system in the building.