Abstract
This manuscript proposes the usage of Statistical Control Charts (SCC) to monitor water consumption in buildings. The charts were employed to study the impact of replacing toilets, providing visual and statistical feedback to measure the efficiency gain resulting from the replacement of outdated flushing equipment with newer devices. The case study was conducted in a building from a university in the South of Brazil. The building has four restrooms, from which a total of 41,554 readings were collected during a 15-month period using digital water meters. After the toilets were replaced, a reduction averaging 30.22% in water consumption was observed (from 7.51 L/flush/day to 5.24 L/flush/day). Additionally, the control charts were able to pinpoint dates when unique events happened during the water-consumption monitoring process.
Highlights
Available water sources are limited, and droughts impact several regions of the world, contributing to the water resource crisis, which represents an obstacle that restricts the world’s sustainable development [1]
To monitor the toilets’ water consumption, data were initially collected from 7 August 2017 to 1 July 2018, a period corresponding to Phase 1
The control charts used in this work proved very useful to detect the water consumption drop after the toilets were replaced
Summary
Available water sources are limited, and droughts impact several regions of the world, contributing to the water resource crisis, which represents an obstacle that restricts the world’s sustainable development [1]. Meireles and Sousa [4] stated that, in addition to its scarcity, water consumption in buildings is related to substantial energy consumption. According to Thornton et al [5], water loss control is a topic of the twenty-first century, as the loss is considered a universal problem that occurs both at the end-users plumbing system and at the water supplier’s distribution piping. It is essential, to monitor water consumption to avoid losses and identify effective measures to enforce water consumption reduction
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