Solar local heating
Back to project overviewProject description
Long-term monitoring of existing plants in
Hamburg, Hanover and Steinfurt
Scientific support for the refurbishment and conversion of the long-term heat storage facility into a multifunctional storage facility
Analysis and evaluation of a regenerative low-temperature heat distribution network (50/30°C)
Special investigations into problems with collector fields
Solar thermal energy 2000 research project - Solar local heating supply
Projects
Larger solar thermal systems with short-term heat storage are preferably integrated into the central DHW heating systems of apartment buildings, hotels, retirement homes, hospitals and housing estates. The solar thermal systems are designed to cover around 40-50% of the heat demand for domestic hot water heating. In residential buildings, approx. 10-20% of the total heat requirement can be covered in this way.
A central heat supply is a prerequisite for the construction of larger solar systems in housing estates. The local heating supply systems consist of a heating center, a heat distribution network and a house transfer station. The central system offers a high degree of flexibility in terms of rapid adaptation to more efficient heat generators, a more environmentally friendly choice of fuel and the cost-effective use of renewable energy sources (biomass).
A seasonal heat storage system is required in order to achieve a significantly higher solar contribution to the total heat demand in housing estates. This long-term heat storage system compensates for the temporal shift between solar energy supply and heating demand. Pilot systems realized to date have been designed for solar coverage shares of 30-50% of the total heat demand.
In a long-term heat storage system, the heat storage capacity is only used up to twice a year. This requires particularly cost-effective storage technologies with the lowest possible heat losses. Long-term heat storage requires large storage volumes to which a correspondingly large number of residential units can be connected via the central heat supply of the housing estate.
The Solar Thermal 2000 research project draws attention to the diverse potential of solar local heating concepts. The use of renewable energy sources and thus the possibility of "heating with the sun" is probably the most important aspect. However, the creative integration of technology into the natural environment can also be meaningfully included in the planning process. In this way, exemplary installations can be created that provide further impetus.