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| Water supply is based on the rainwater collection from 24 m² (~ 80%) of the roof,
which is covered with TRIMO TP 835 panels. Rainwater is drained by RHEINZINK gutters into
the vertical downspouts where EPM rubber trap are installed. From the trap the water is drained
into a rainwater storage tank with a capacity of 400 litres. Lower trap is also an overflow siphon,
which limits the level of rainwater in the tank Rainwater is transported by membrane pump into a thermostatic valve DANFOSS RAVK 25-45°C and coil heat exchanger, which is integrated into the SONNENKRAFT solar heat storage tank, in which water is heated. The volume of the coil heat exchanger is 5 litres. The water is heated to the temperature, which prevents the development of harmful micro-organisms. Thermostatic valve automatically regulates the temperature on the outlets (35°C) by blending the cold water from the rainwater tank and warm water from the heat exchanger of the solar heat storage tank. |
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All the elements of the system are connected by the pipeline network, which is made from a TITAN UPONOR MLCP multi-layer pipe. The pipes have an inside layer made of aluminium, which prevents the oxygen diffusion. The inner and outer layer of the pipes is made from high temperature resistant polyethylene (PE-RT), which prevents deposition of impurities and corrosion. The system of colour coded fittings for pipelines connections enables a great flexibility in the construction of the system also in smaller spaces of the Cell. |
| Before the out-flow points of the pipeline there is a built-in set of filters consisting of a particulate, carbon and microbiological filter. This ensures that warm sanitary water reaches the quality of drinking water. |
| Out flow points in the kitchen and sanitary unit are equipped with KOLPA products. Sink Kolpa San Fruit 50 and kitchen sink are made from Kerrock+, which contains an antibacterial agent and can be recycled. |
FAQ
| Is the water in the Cell drinkable? A: The rainwater, which is used in the Cell achieves the standards of drinking water, but due to the regulations, it is not used as a drinking water. Therefore all out-flow points are equipped with a warning! The residents of Cell drink bottled water. Is a rainwater tank big enough? A: The size of the rainwater tank can be determined based on experiences or with computer tools. Experience based selection is based on the roof surface area used for rainwater collection (in the Cell 24 m²), roofing material, the annual volume of precipitation (in Ljubljana 1150 litters per m² per year) and the effectiveness of the separator in the downspouts pipe. Based on this, suitable size of the rainwater tank in the Cell would be 650 litres. With computer programs hourly precipitation and consumption dynamics can also be considered. TRNSYS software calculations have shown that, for a constant supply of water we would need a reservoir with a volume of 2 m³. Critical is the period in the second half of February. Because we predict that the sanitary water consumption in the Cell will be lower than in typical household, residents will be warned about economical water use by SmartMonitor (more at: >monitoring > SmartMonitor), we built a rainwater tank with a capacity of 400 litres in the Cell. |
 
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