Energy Supply Systems for Buildings
Profile of Market Area
New residential buildings are built to be increasingly energy efficient and have a low heating demand. The building envelope is airtight to a large extent and therefore a ventilation system, preferably with waste heat recovery, is generally necessary. In residential buildings that are especially energy efficient, e.g. passive houses, the heating demand for the hot water can be greater than the demand for the space heating. Comparable goals in energy efficiency can be attained, when building renovation is carried out using the state-of-the-art technology available today.
For these high efficiency buildings, a suitable building technology system (HVAC) is required. Ventilation units having a high degree of heat recovery, low energy consumption and low noise level are important assets for achieving efficient buildings. Particularly interesting for these low energy yields is a mono-energetic energy supply provided only by electricity and an efficient heat supply provided by a heat pump. In buildings which are especially efficient, the co-generation of electricity and heat by means of small Stirling motors, gas turbines or fuel cells often can take place without the use of a costly back-up heating unit. Using biomass for the heating supply greatly increases the CO2 balance of the building. The integration of the heating supply unit and the ventilation unit into one saves costs. Within the scope of an integral building planning strategy, an HVAC system in combination with a thermal solar system further increases the efficiency.
