Design And Development Of Rainwater Conservation System For Application In School

Hii, Ding Fung (2020) Design And Development Of Rainwater Conservation System For Application In School. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

In this study, a feasible RWH system has been conceptually developed for the selected school premise which is a building in SJK(C) Ayeh Keroh. The design of the RWH system is mainly based on the purpose of the RWH system application within the school premise. The purpose of this RWH system is to supply as backup toilet flushing water for the school building and helps to solve water shortage problems in the school. If the rainwater is abundant, this system can replace the municipal water for flushing toilet purpose. The design components including collection system, piping system, filtering system and storage system. The components of the RWH system are uPVC gutters, filters, uPVC pipes, a 3000 liters polywater tank and a 1/2 HP booster pump. For the water tank component, material selection analysis compared three types of materials which are polywater tank, steel water tank and stainless-steel water tank. Ultimately, polywater tank material was chosen due to its high durability, easy installation, easy to maintenance and variety. The 3000 liters water tank capacity is determined by the demand side approach which the storage tank capacity is determined by analyzing the water demands of that building. For performance analysis, a stress analysis has been conducted by using Solidworks for storage tank component. The result shows that thee storage tank can withstand up to a maximum von Mises stress of 106986.1 N/m2 and a minimum von Mises stress of 32.0 Nm2 by defining a pressure of 126477.5 Pa that act onto the inlet of the water tank. The total estimated initial install cost by considering all the material costs and labor costs for this RWH system is about RM 5109.88, without considering the maintenance cost. The cost, application, treatment system, rainfall characteristics, policy, and public perception are the practice and implementation issues that we might face. Lastly, a comprehensive study about the RWH system need to be done before designing the RWH system due to various factors such as cost, application, rainfall characteristics, purposes of RWH system and implementation issues

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