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Adiabatic cooling in a technology centre

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Adiabatic cooling in Technologie- und Gründerzentrums (TGZ) Würzburg / Germany / 2015


Adiabat cooling, Rainwater harvesting


2x AQUALOOP, PURAIN 200, RWZ 14-60-P


Operating point, water treatment

1,2 m³/ day

Operating point, rainwater harvesting

4,2 m³/ h

Useful volume concrete storage tank

25,7 m³

Connected roof area

1.170 m²,

Expiration coefficient c = 0,5


The newly erected building, covering an area of around 3,600m², offers technology-oriented, young companies rooms, service, advice and networks. The planned uses are office and training rooms as well as the 600m² workshop for the installation of test facilities. The building meets the quality standard KfW 55 Passive House. The TGZ provides a home for young start-ups and, thanks to its close ties to the university, offers the opportunity for intensive knowledge transfer.

A particular highlight is the INTEWA rainwater system with AQUALOOP disinfection for adiabatic evaporation cooling. Compared to conventional cooling systems, energy savings of up to 80% are achieved. The use of a reverse osmosis system is no longer necessary as the rainwater is particularly low in lime.

Total project sum: 11.825 million EUR

System components:

  • 2 AQUALOOP membranes for rainwater disinfection
  • Rainwater storage tank with usable volume 25.7 m³,
  • Pre-filtering by PURAIN 200 rainwater filter
  • RWZ-14-60-P for WC, urinals and for irrigating green areas
  • Submersible motor pump Multi-04 for supplying adiabatic cooling