Study On Rainstorm Application And Water Saving Method Based On LEED System

Focusing on water saving and localized application, the thesis has studied the rain-storm water saving and collecting application based on LEED system.In order to demonstrate local solution of water saving credits in LEED system and recommendation to develop national Green-Building standard, LEED localized audit case have been studied and analyzed as typical applications. With comparing and analyzing the various climate features and demands in different areas (Suzhou and Gansu as example), the thesis concludes the localized application characteristics, complementarily adjusting the various indexes without limitation of one specific index operation, and designing the flexible green localized solution based on the various natural situations and economic sta-tus in different areas.Based on the assessment credits of LEED system, the thesis has compared and ana-lyzed the traditional gravity and siphonic system in principles, studied the causes & condi-tions of siphonic effect, plus the hydraulic characteristics of rainstorm drainage, and then demonstrated the great energy saving performances of siphonic system. With the applica-tion of advanced engineering hydro mechanics theory, the thesis has set the rainstorm siphonic fluid optimal model, and then the conclusions have been got that the tail pipes and horizontal collect-pipes are the key parts in siphonic drainage system, and the slope angle of its horizontal collect-pipe is vital to siphon priming. When making the slope angle bigger, the full pipe flow and siphonic effect will be delayed longer, that result in the whole system tend to failure. This conclusion offers the great assistance on the further re-search of siphonic system.On account of LEED systemic layout required, the thesis has also made the related hydraulic analysis of siphonic system and calculated the pressure and flow rate of the var-ious pipe sections. Then it has set the optimal model and found out the best solution for pipe lay-out, aiming at minimum costs with the considerations of related constrains condi-tions.Adopting the advanced evaluation measures of LEED system, the thesis has prelimi-narily demonstrated the workable principles for the rainstorm collection and storage, with the eye to the latest study both domestic and abroad. With the specific example of LEED authentication, the thesis has offered the new calculating method of rainstorm reservoir capacity, aiming at the realization of LEED water saving target.With the orientation of multi-objectives selection of rainstorm application, it has adopted the non-linear programming method of constraint conditions and set up the multi- objective optimization model. With the application of this model, the feasible localized rainstorm solution has been worked out with view of the various regional characteristics and development needs.