Abstract
The building sector has a huge potential for reducing greenhouse gas emission without the need of a higher sufficiency. The key is to build and retrofit buildings with good envelopes as well as choosing efficient heating systems. A heating system with a brine-water heat pump and PVT collectors as single heat source is suggested here as an alternative to an air-water heat pump system for single family houses. In the system simulations performed, the PVT-heat pump System (“L-Sol”) is more efficient than an air-water heat pump system and still affordable. As the System L-Sol produces heat and electricity on the same area it saves space, disadvantages like noise emission of air-water heat pumps or costly drilling of bore holes are omitted. The system has been optimized in terms of efficiency by testing different dimensioning of the components and regarding the grid purchase by optimizing the system control.
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