Change in heat load profile for typical Danish multi-storey buildings when energy-renovated and supplied with low-temperature district heating
Abstract
Denmark has a long-term objective of being free of fossil fuels by 2050 with the energysupply-mix for buildings being free of fossil fuels by 2035. Hence energy consumption from existing buildings needs to be decreased concurrent with the conversion from fossil-fuel supply into renewable-energy (RE) supply. When end-use-savings are implemented in buildings concurrent with the application of low-temperature district heating (DH) (supply=55°C, return=25°C) the heat demand profiles for the individual buildings will change. The reduction in peak load is important since it is the dimensioning foundation for the future DH-systems and in order to avoid oversized RE-based capacity, a long-term perspective needs to be taken. The results show that it is possible to design the DH-plants based on an average value of the 5 days with highest daily average loads without compromising with indoor thermal comfort. Applying low-temperature DH to existing buildings without changing the heating system imply reduced radiator performance, and it is of great importance that acceptable comfort temperatures can still be provided. The results indicate that it is possible to apply low-temperature DH for approximately 90% of the year without compromising thermal comfort when energy renovations are carried out.
Info
Conference Paper, 2013
UN SDG Classification
DK Main Research Area
Science/Technology
