Energy self-sufficient Hotel
The hotel aquaTurm in Radolfszell, Germany, measures 50,5 meters in height and, after some reconstruction, is now host to an extravagant designer hotel.
World’s First Zero-Energy sky scraper
The heart of the aquaTurm’s regulation system are two UVR1611 and three CAN-I/O 35 or 44 of the Technische Alternative. These devices individually regulate several heating and DHW circuits, as well as the natural cooling of the building via subterranean water. The excess heat of the floor heating is conveyed downstream to the heating pump to achieve a higher CoP. Additionally, two solar thermal systems are regulated using pump speed control and two solar-powered laundry dryers.
The residential heating, DHW and laundry dryers get their heat primarily from two separate fields of vacuum tube collectors (roof-integrated, 32,1 m2 and façade integration with 16,2 m2 of surface). Remaining heat demands are covered by a ground water heat pump with a maximum heating load of 44 kW. The ground water well is also depraved of the necessary natural cooling energy.
The heating is done via floor heating systems with individual room regulation. The DHW supply is decentralized via DHW stations in the floors. Additionally, two laundry dryers are supplied with energy from the solar cylinder.
The solar yield is fed into a seasonal glass fiber storage tank with 10.124 liters of capacity. The DHW preparation, a backup charging cylinder with 1.180 liters of capacity is in place.