HUBER RoWin Heat Exchanger for direct preheating of process water in a hospital
A flow of high-temperature wastewater is passed through the heat exchanger through which fresh drinking water flows from the other side. In this case, it is not necessary to use a heat pump as the heat already has a high temperature level. In the university hospital "Klinikum rechts der Isar" in Munich heat is directly recovered from the surgical instruments washers and returned to the washers on the fresh water side (see fig. 2). Heat recovery in such a small circuit offers two advantages: First, the systems used are relatively simple in most cases and therefore cheap to implement. Second, the time offset from when the warm wastewater is generated to when fresh water is needed is short. The unique buffer function combined with the patented cleaning of the HUBER RoWin Heat Exchanger makes this application so efficient.
RoWin for a win-win
The company Lindenschmidt KG in Kreuztal, Germany, is a disposal company for problematic oil-containing materials. Biological degradation of these materials leads to a strong rise of the wastewater temperature in the aeration tank so that cooling is welcome. With the use of the HUBER RoWin Heat Exchanger energy can be extracted from the waster in the bio-system and directly passed on to the waste oil storage tank. This solves two problems at a time: First, the temperature in the bio-system is optimised. Second, fossil energy carriers that would be required to heat the waste oil storage tanks can be saved.
A variety of application possibilities in various industries
The basic idea of these economical applications for heat recovery from polluted media can also be transferred to for example food industries (preheating of feed water for vapour generation), paper mills as well as disposal companies and other producing industries that generate warm/hot wastewater.