Efficiency of rainwater reuse by dual installation under real precipitation conditions
DOI:
https://doi.org/10.36119/15.2021.12.6Keywords:
dual installation, real precipitation, rainwater harvesting, rainwater reuse efficiencyAbstract
The paper presents the exemplary efficiency analysis for rainwater reuse by a dual installation system under real precipitation conditions. The dual installation system was designed for a hotel building and its aim was to collect water from roof, store it in the external tank unit and further reuse it for toilet flushing. The efficiency of the dual installation was tested by a numerical simulation, considering the real precipitation, which covers one hydrological year (01.11-31.10) and is characterized by the annual precipitation equal to 1037 mm. The model analysis was performed in SWMM 5.1 software. The aim of the paper was to answer the question whether the rain wastewater collected from the hotel roof during rainfalls is enough to cover the water demand for toilet flushing. Additionally, the water level in storage tank and the frequency of additional storage supply was analyzed. The obtained results enabled the required improvements in the dual installation system in order to recycle water more efficiently, especially under very irregular precipitation conditions.
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