基于成本加成的再生水阶梯定价方法研究

再生水作为城市的第二水源,能有效缓解水资源危机。以再生水管网建设的资金回收为前提条件,运用成本加成的方法,确定用户使用再生水的成本价格与需求量、输水距离之间的函数关系,并根据用户与水厂之间的距离划分不同的用户群;进而针对用户群内用户需求量的差异,采用阶梯定价的方法对再生水的价格制定进行研究,建立了基于再生水用户需水量、输水距离等因素的复合阶梯定价模型。最后,以西安市第二污水处理厂为例,运用模型计算其用户-西郊热电厂的再生水使用价格,验证了此定价模型的准确性与实用性,为再生水价格市场化发展提供了理论依据。

Research on ladder pricing method of reclaim water based on cost-plus

Reclaimed water is the second water source of city and can effectively alleviate the water crisis. Taking that the funds of reclaimed water network construction should be recovered as the premise,the paper used the method of cost-plus to determine the functional relation between cost price, demand and transportation distance of reclaimed water used by users. The users are divided into different groups according to the distance between users and water plant.According to the demand diversity in different users, it took to price reclaimed water and set up a complex tiered pricing method based on water requirement of reclaimed water and the distance of conveyance. Finally, taking the second sewage treatment plant in Xi'an for example,the paper used model to calculate the water price of user - western suburbs power plant of Xi'an,and verified the accuracy and usefulness of pricing model. The result can provide a theoretical basis for the development of market of recycled water price.