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- W2245816062 abstract "In the current evolution towards renewable energy supply in buildings, district heating networks are seen as a promising solution for the distribution of renewable heat from a central generation plant to the consumers. However, when it comes to the actual design of such systems, questions rise about which system components (e.g. storage tanks) and control strategies (e.g. continuous versus discontinuous operation of the network) are interesting to increase the energy-efficiency of the district heating system while not decreasing the end-user comfort. In this study, a building energy simulation model is set up (using TRNSYS) for investigation of the gross energy use and energy-efficiency of district heating systems. Especially the distribution network and the local substations are regarded, and (so far) the focus is on small district heating systems in the residential sector. The main components of the simulation model are energy demand profiles for space heating and domestic hot water, the substation model and the supply and return networks which serve heat for both space heating and domestic hot water. Two types of substations were modelled (with and without a local storage tank) and for each substation a continuous and discontinuous network operation mode was designed. The first results indicate that the design concept of the substation has an important impact on the energy use of the entire system and that in the small and well-insulated network, the distribution heat losses are low. Therefore the distribution network operation modes have a limited impact on the amount of heat delivered to the distribution system. However they can possibly have a significant influence on the efficiency of the heat production technology and thus the gross energy use of the system. As the energy demand profiles influence the behaviour and energy use of the system, it is important to expand them further. Regarding the development of the simulation model, it is necessary to make it more manageable for the simulation of larger districts in the future." @default.
- W2245816062 created "2016-06-24" @default.
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- W2245816062 date "2012-01-01" @default.
- W2245816062 modified "2023-09-27" @default.
- W2245816062 title "Prediction of energy use in district heating systems using BES" @default.
- W2245816062 hasPublicationYear "2012" @default.
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