Apparently, necessity is the mother of invention: eco-pioneer Rudolf Weimann from St. Georgen an der Gusen has been working with alternative energy sources and sustainable electricity for decades and does not shy away from trying things out for himself. His latest idea sounds strange.
“A heat pump was used to extract 22 degrees Celsius from the 25-degree warm waste water from the bathtub, thus recovering this energy. The heat pump uses this to heat the house. I have applied for a patent for a heat exchanger for this concept,” explains the inventor. The pioneer carried out the first self-experiments last winter and got through the cold season very well. This winter, too, Weimann wants to rely on his “heating with waste water” system again. Reduced operating costsHe sees enormous potential in this – especially in times of crisis like these, when everything is becoming more and more expensive and scarce: “The operating costs for energy would be reduced in public housing for always sink, the warm waste water from the baths is available 365 days a year free of charge. The warm water currently disappears unused into the sewage system. We have to use the energy that we lose there.” There are obstacles, but such a changeover would probably not be possible overnight. According to Weimann, not every waste water is suitable for heat generation. You would need two different downpipes, i.e. derivations: “The first downpipe would be for the kitchen and toilet. In the kitchen, for example, too much fat and oil comes down the drain, which would clog the heat exchanger. The remaining waste water from the bathroom then comes in the second downpipe, and you can use that.”
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