High-rise Building Water Supply System Optimization Design Study

High-rise's water supply system is an important component of high-rise,who is far superior to general water supply system in technology scope and design depth because of the particularity of high-rise, such as more floors, big height, wide functions, complex structure and being restricted to all kinds of external conditions. In the design of high-rise water supply system there are many unsolved problems both here and abroad.Especially, with the perfection of all kinds of establishmnent such as water supplyhot water system, drainage water, fire control, central heating and wiring, which lead to the increase of all kinds of pipes and consequently the fee will increase. Under this condition it is necessary to look for the most economical optimal design, including selecting rational water supply manners, having optimal vertical subarea, pipe networks optimal design and rational pump selection, to save investment and resource.However little work has been done in these fields to this day. This paper is just based on this demand and to do some work on the optimal design of high-rise water supply system. Some satisfied results have been got.This paper emp1oys Analytical Hierarchy Process (ALP for short) to select waterSupply manner. Aiming at all kinds of manners (eight kinds), this paper considersquestion from possessive building area, equipment investment, water supply reliability. energy consumption and management convenience extent and also considers the opinions of owner and experts as well as manner's applicabi1ity synthetically. By the way of ALP we can get a building's relatively optimal water supply manner. The result shows that : this way can supply a gist for scheme selectionand make it more rational.From the viewpoint of system this paper makes an optimal water supply verticalsubarea for high-rise. On the precondition of satisfying the consumers' waterutilization demands this paper considers the factors of the investment of pipes andequipment, management fee, construction investment. Through a mathematical model,we can get the optimal subarea number, each riser pipes' diameter, horizontaldistribution pipes' diameter and select each subarea's pump type also. This subareaselection manner overcomes the shortcoming of taking sanitary ware's utmost bearingforce as the gist of vertical subarea, and can consider the question of economicefficiency and water utilization's reliability By this way can we get water supplysystem's optimal subarea number.This paper benefits from the experience of city pipe network's optima1 designand predecessors' research accomplishments, combines the characteristics of building ABSTRACT一pipe network and establishes linearprogr删ming model andnon－linearProgrammingmodel to pipe network under outdoorpipe network pressure and pump pressureresgectivelt·几 the formerthis paPertakesthe standarddiameter'spipe lengthasoPtimal variable,the least pipe network investment as objective function along withvelocity and pressure as restriction conditionic form a linearprograrnming model．The model can be solved by simplex method,T帅ugh the model we can get thetubulations'oPtimal diameter．h the ataterthis papertakes standard diameter asoptimal variable to all the pipes and takesthe least pipe network investment or leastannual cost as function's objective to establish a non－linear progra。lug．The paperemploys Genetic Algorithm to solve this model．The result shows that:by this mannercan we obtain rational pipe network tubing and have pump selection also,and at thesame time the optimal design has the effect ofsaving investment and improvingdesign efficiency． According to this paper's researchresult,relatedprogramming ofpipe networkoptimal design has been programmed including linear programming program,GeneticAlgorithm program．These programs haVe versatility and it can be used in other kindsofpipe network"s optimal design．...