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Efficient heat utilisation through new technologies

Thermally-driven micro cooling systems, latent heat and cold storage facilities, ORC technologies or thermally-driven heat pumps: The use of modern building technology and the development of distribution technology and system components represent important aspects of the EnEff:Wärme research initiative - just like intelligent control and measuring technologies. Together, they form a fundamentally new heat supply concept.

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Projektstatus: Phase 3
EnEff:Wärme - Forschung für energieeffiziente Wärme- und Kältenetze

Emulsions for supply systems: New fluids as heat transfer mediums in air conditioning and refrigeration technology

Storage media are essential to make use of renewable energy. In addition to this, energy distribution in thermal networks has potential for increasing efficiency by increasing the transport capacity. In this project, researchers work on heat-transfer fluids (PCS) with at least twice the energy density of water as a heat medium. They developed simulation models to map complex hydraulic networks with two-substance fluids and phase change media.

Functional prototype, 160 kW (Hummel)
Projektstatus: Phase 4
EnEff:Wärme - Forschung für energieeffiziente Wärme- und Kältenetze

Field test of absorption cooling technology for trigeneration systems

As part of a nationwide field test, approx. 15 absorption cooling systems with a total capacity of 1.25 MW were installed for a wide range of applications and tested in operation. These systems are based on absorption chillers with nominal cooling capacities of 50 kW (Biene – bee) or 160 kW (Hummel – bumblebee), which were developed in a forerunner project as functional prototypes.

Projektstatus: Phase 3
EnEff:Wärme - Forschung für energieeffiziente Wärme- und Kältenetze

On-site calibration of flow meters in district heating

The project makes an important contribution to energy optimisation of district heating networks. With the development of a laser-optical procedure for on-site calibration of large-scale flow meters, they can be calibrated while the network is operational, reducing balancing uncertainties.

Projektstatus: Phase 3
EnEff:Wärme - Forschung für energieeffiziente Wärme- und Kältenetze

Cost-effective transport of district heat for developing combined heat and power

The aim of the project is to make use of co-generation heat from particularly effective large-scale plants in areas where heat was previously generated in less effective and particularly expensive units. In addition, it is also intended to reduce the construction costs for district heating transport pipelines through planning, structural and constructional further developments.

Main building of Gießen University Hospital
Projektstatus: Phase 3
EnEff:Wärme - Forschung für energieeffiziente Wärme- und Kältenetze

Energy plant at Gießen University Hospital

The operation of hospitals places considerable demands on the energy supply security, since the failure of necessary energy flows can have far-reaching implications. The use of waste heat from the exhaust gas and cooling water from gas engines, the incorporation of high-temperature heat from the fuel cell unit as well as cooling using absorption and vapour compression chillers provides a wide range of thermal energy that is utilised in combination with combined heat and power generation. The diversity of individual power systems and the provision of redundancy using an oil-fired boiler that can be immediately switched on in emergencies guarantee optimum supply security at Gießen University Hospital.