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AssigneeLyonnaise Des Eaux France
InventorFrederic Duong
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The invention relates to a method for extracting heat from an effluent (2) circulating in a conduit (1), especially a waste water collector, according to which a heat exchanger (E) is installed, at least in the bottom of the conduit, said heat exchanger (E) lying in the effluent and being formed by coating tubes (3) with sufficiently heat-conductive concrete cast around the tubes intended for the circulation of a heat-transfer fluid, the heat exchange with the effluent of the conduit being carried out through the moulded coating. The concrete (4) of the coating consists of a least 50 weigh % of silicon carbide, a load of needles made of a heat-conductive and mechanically resistant material, a binding agent and the remainder of alumina, metal powder or carbon.
A method for extracting heat from an effluent flowing along a pipe, notably a sewer, the method comprising installing, at least in the bottom of the pipe, a heat exchanger (E) which is immersed in the effluent the heat exchanger (E) being formed by coating tubes with a sufficiently thermally conductive concrete poured around tubes through which a heat-transfer fluid is intended to circulate, the exchange of heat with the effluent of the pipe taking place through the cast coating,
An exchanger for extracting heat from an effluent flowing along a pipe, notably a sewer, installed at least in the bottom of the pipe so that it is immersed in the effluent, the exchanger comprising tubes embedded in a thermally conductive concrete poured around tubes through which a heat-transfer fluid is intended to circulate, the exchange of heat with the effluent of the pipe taking place through the cast coating,
Dependencies are inferred from the claim text.