thediscussionofwater-savingtechnologyaboutwatersupplyanddrainageinbuilding-外文文獻(xiàn)-全文預(yù)覽
【正文】 pipe circulation method, the volume of ineffectual cold water in theory，volume of water saving，and the estimate cost of corresponding backwater systems engineering are correspondingly calculated. Based on the amount of watersaving and the view of satisfaction, the order from good to bad is branch pipe circulation, stand pipe circulation and main pipe circulation and loop free system. Based on the capital payoff time, branch pipe circulation is about 30 years, stand pipe circulation is about years, and main pipe circulation is about years [3]. Therefore, considering the watersaving effect and the engineering cost, main pipe circulation method and loop free system should better not be use in the new buildings’ centralized hot water supply system. According to Architectural Nature, architectural standards, regional economic conditions and the specific situation, branch pipe circulation or stand pipe circulation can be used to reduce even eliminate the waste of ineffectual cold water. IV. ADOPT WATERSAVING WATERDISPENSING FIXTURES AND SANITARY WARE A. Adopt watersaving waterdispensing fixtures. When hydraulic pressure is the same, the amount of saving water of Ceramic core watersaving taps and inflating taps, etc. is between 20% ~ 30%. The ceramic core watersaving tap not only has good sealing performance, there is nodrip after switch on and off tens of thousands of times, but also has significant watersaving effect. Especially when static pressure is higher and the water yield of ordinary tap is larger, the volume of saving water of watersaving taps is larger. Watersaving shower only need 9 L water every minute which can save half amount of water pared with ordinary shower. In public buildings the delayedselfclosing or photoelectriccontrol faucets and flush valve is used to avoid waste of water. Because the time of discharge of these sanitary appliances can be adjusted within a certain range. On the other hand, these sanitary appliances can operate by themselves to prevent spread of bacterium. B. Adopt watersaving sanitary ware The amount of water volume of the flushing toilet in residence occupies about 30% ~ 40% water volume of the whole day. In current toilet of residence, big and urination Share the same toilet stool and adopt the same flushing water, the flushes water volume is larger or equal 11L. Water consumption is large. This is obviously a waste. In addition to the toilet bowl whose volume of flushing water is less or equal 6L has been promoted to use, there is a kind of toilet stool which has two gears’ cistern [4]. The flushing water is 3L when flushing urination, while flushing water is 6L when flushing shit. V. PROMOTE THE UTILIZATION OF HIGHQUALITY PIPE AND VALVE Galvanized steel pipe has been widely used in drinking water supply system in the internal building as a water main pipe. However, corrosion of galvanized steel is easy to produce and breed bacteria, which can not only cause serious secondary pollution for water quality, but also the leakage of corrosion can lead to the waste of architectural environment and water resources. China39。 and at the same time the emissions will reduce 35% ~ 50%。 insist on the bination of watersaving and water resources’ development。 Wastewater Engineering, Vol. 34 2020, . [5] Tan Chunan, The Study of Reuse of Reclaimed Water in Building and the Rationality of Technical and Economic. [D], Dalian University of Technology, 2020, . [6] Xiong Jiaqing, Rational Exploiting and Using Water Resource of Green Human Settlement.[D], Xi’an University of Architecture and Technology, 2020, . 672671。 Wastewater Engineering Vol. 33 2020, . [3] Fu Wanxia. Zeng Xuehua. Discussion on Building Water Saving, Wateramp。 scientific research instituti
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