给水管道技术经济比较中应重视常年运行费用的量化分析(精).docx

给水管道技术经济比较中应重视常年运行费用的量 化分析 摘要：应用达西一魏斯巴赫(Darcy-Weisbach)公式，曼宁(Manning)公式及谢才 (Chezy)公式，以管道的摩阻系数为其础，以塑料和钥筋混凝土两种管道为例， 对“动态分析法”计算给水管道工程最低成本时的常年运行费用 (30年全寿命 期间、残值为零)展开量化分析。 关键词：技术经济比较 常年运行费用 量化分析 折现 工程成本 水力坡降 Focus On Data An alasis Of the Cost Of Op erati on in Comp ari ng Water Pipe Tech ni cal Economy Abstract : By tak ing the p p lastic pipe(PP) and rein forced pipe(PCP) for example ，this paper is to give a data analysis with a view to the cost of op erati on (COOjesidual value is duri ng its 30-year life span), which is worked out by the dyn amic an alysis method to compute the lowest cost of water pipe project ，with the employment of the eqcuati ons of thee:Darcy-weisbach, Manning and Chezy and the hydralic frictio n coefficie nt as the base.As the flow and pipe 3 diameter(eg.Q=100,000m /d， DN1000)being fixed,the hydralic gradient on the calculati ng pip eli ne is an alyzed order compare the differe nee of the COO and that of the static cost(maily refferri ng to the cost of the pipe material) Prior to comp arisi on ,the differe nee should be disco un ted (rate i=10%)i nto the cost of inv estme nt for a p roject.Sec on dly,to compare the carry ing cap acity of pip e(CC OP) of the two kinds of pipe of the same diameter(DN1000) : provided,the outlay exceeds the COO by 18.8%,the CCOP of the PP will be 35.7 % higher than the RCP ; if the consumption is equal to the COO,the CCOP will be 27.5 % .When the CCOP ie defined as the same(Q=100,000^d),the diameter of the PP will be smaller than that of the RCP.Also ，there will be reduction in the COO.The above said (4) (4) dynamic cost and static cost will have a great impact on the cost of work,and are very likely to choice of a plan. Keywords：comparing technical economy ；cost of operation(COO) data analysis ；discount ； cost of work ；hydraulic gradient 工程设计方案技术经济比较的实质，就是各方案所体现的经济效果，即能 以最少的人力、物力、财力消耗获得最佳的工程效益。为了正确评价方案经济 效果的优劣，人们意识到“资金的时间价值”以后，感觉到“动态分析法”比 “静态分析法”更符合客观经济规律。然而，采用了正确的评价方法，不等于 评价出的结果就一定正确，因为人们往往对动态成本即常年运行费用等经常性 的成本并未做