The installation space required for the heat exchanger is 6.5 m². The big challenge was the complicated integration into the existing building – the heat exchanger was divided into three sections, flanges were mounted and the sections reconnected on site. Another challenge for the planning office generally is control engineering and the definition of interfaces.
Since November 2014, the energetic potential of the effluent from the ZSVA's dishwashers is used by the heat exchanger to preheat the demineralized water that is needed to operate the cleaning and disinfection devices. The temperature raise of the demineralized water cycle can be up to 20 °C. Through connection of the sensing devices to the building control system the temperature raise can be retraced any time. Also the volume flows can be controlled and documented this way. The plant has operated without interruption since the 4th quarter of 2014, ensuring the reliable utilisation of the energetic potential of the effluent from the ZSVA's washing equipment. In 2014, the degree of capacity utilisation of the ZSVA was 65% – the plant will have paid off after about 8.5 years on this basis. The plant has however been designed for the actual capacity expected for the next years. The fact that the capacity utilisation increases year by year has a positive effect on the economic efficiency of the plant.
You are welcome to get an impression of this innovative and sustainable installation with your own eyes!
Visit us at the IFAT in Munich: Join our free tours of the wastewater heat recovery plant at the hospital "Klinikum rechts der Isar" on Thursday, 2nd June!
We will also be pleased to welcome you on our stand (No. 351 in hall A2) where we present a comprehensive range of products and solutions for wastewater treatment, heat recovery, sludge treatment and drinking water supply.