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Sewage heats and cools military hospital

Budapest’s Military Hospital State Health Centre is now heated and cooled using energy recovered from urban sewage and wastewater networks.

Minister of defence Csaba Hende and mayor of Budapest Istvan Tarlos inaugurated the new system, which is based on patented technology developed by Hungarian company Thermowatt.

The thermal energy recovered from the underlying sewage and wastewater networks provides heating for the centre’s two biggest buildings, amounting to 40,000 sq m.

On hot days, the system also cools the buildings by putting excess heat back into the wastewater stream.

It is also capable of heating and cooling different parts of the same building simultaneously.

Comprising a 3.8MW unit (3.2MW for cooling), this is the largest installation of its kind in the world.

Thermowatt managing director Pál Kisssaid: “After six years of developing and operating Thermowatt systems we have the expertise to design and build heating and cooling solutions for large buildings and building complexes of any size, given an adequate wastewater stream.”

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