Reliability analysis of rainwater tanks in Melbourne using daily water balance model

被引:87
作者
Imteaz, Monzur Alam [1 ]
Ahsan, Amimul [2 ]
Naser, Jamal [1 ]
Rahman, Ataur [3 ]
机构
[1] Swinburne Univ Technol, Fac Engn & Ind Sci, Melbourne, Vic, Australia
[2] Univ Putra Malaysia, Fac Engn, Dept Civil Engn, Serdang, Malaysia
[3] Univ Sydney, Sch Engn, Sydney, NSW 2006, Australia
关键词
Rainwater tank; Daily water balance; Climatic conditions; Reliability and historical rainfall; COLLECTION SYSTEM;
D O I
10.1016/j.resconrec.2011.09.008
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
With the aim of developing a comprehensive decision support tool for the performance analysis and design of rainwater tanks, a simple spreadsheet based daily water balance model was developed using daily rainfall data, contributing roof area, rainfall loss factor, available storage volume, tank overflow and rainwater demand. In order to assess reliability of domestic rainwater tanks in augmenting partial household water demand in Melbourne (Australia) area, the developed water balance model was used for three different climatic conditions (i.e. dry, average, and wet years). Historical daily rainfall data was collected from a rainfall station near Melbourne city central. From historical rainfall data three representative years (driest, average and wettest) were selected for the current analysis. Reliability is defined as percentage of days in a year when rainwater tank was able to supply the intended partial demand for a particular condition. For the three climatic conditions, several reliability charts are presented for domestic rainwater tanks in relations to tank volume, roof area, number of people in a house (i.e. water demand) and percentage of total water demand to be satisfied by harvested rainwater. In brief, for a two-people household scenario, similar to 100% reliability can be achieved with a roof size of 150-300 m(2) having a tank size of 5000-10,000 L However, for a four-people household scenario, it is not possible to achieve a 100% reliability, even with a roof size of 300 m(2) and a tank size of 10,000 L (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码:80 / 86
页数:7
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