Tham khảo tài liệu 'water conservation part 6', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 66 Water Conservation Vittal K. Vijayalakshmi K. Rao U. 1983 Effect of deep tillage on dryland crop production in red soils of India. Soil and tillage research 3 377-384. 5 Determination of the Storage Volume in Rainwater Harvesting Building Systems Incorporation of Economic Variable Marina Sangoi de Oliveira Ilha1 and Marcus André Siqueira Campos2 department of Architecture and Construction School of Civil Engineering Architecture and Urban Design University of Campinas Campinas SP 2School of Civil Engineering Federal University of Goiás Goiânia GO Brazil 1. Introduction Rainwater harvesting has been used as a technique to promote water conservation in buildings as it substitutes the potable water in activities where the use of potable water is not required. In spite of the surge in interest over recent years some questions still remain regarding to these systems mainly what involves the reservoir sizing. There are many methods for this purpose that use different inputs such as rainwater demand catchment area roof material rainy data daily or monthly and dry periods. Even in the Brazilian Standard ABNT 2007 there is no consensus as to which method should be used. Table 1 shows the main methods found in the literature and their respective inputs. Mainly in developing countries actions that promote water conservation must be economically feasible so it can raise the interest in investments. Moreover urban lots are progressively smaller and more expensive. These variables can restrict the size of the reservoirs used in a rainwater system and this should be considered in their design. This article proposes the use of an optimization technique to find the most adequate volume of rainwater reservoirs . the optimal economical result measured by the Net Present Value NPV the Particle Swarm Optimization PSO . PSO is a population-based technique of stochastic nonlinear functions. Its use was inspired by social behavior in flocking birds or school of fishes Boeringer .
